x402 List

x402 Protocol Service Directory

Open Source Filings (OSF)

Data PAYMENT-READY

payment-ready until 2026-08-20

Pay per record marketplace of provenance stamped US government and scientific data for AI agents: 8.1 million records across 80 official sources. Sanctions and debarment screening on 11 authorities, SEC filings, CVE and KEV, federal spending, patents, federal court opinions and scholarly research. Every priced endpoint can be tried free on the same URL by adding ?trial=1: one real call per endpoint per hour, no wallet, no signup and no key. Also reachable over MCP with 21 tools, 15 of them free, installable with npx osf-data-marketplace.

Pay from $0.05 per request in USDC on Base, settled onchain via the x402 protocol, no signup, no API key needed.

first settlement 2026-07-21 · $11.48 all-time · settled via coinbase

BASE URL https://api.osf-master-server.com WEBSITE https://osf-master-server.com ENDPOINTS 14 NETWORK Base ASSET USDC MEMBER SINCE 2026-07-21 MONITORED SINCE 2026-07-21

ASSESSMENT

updated 3h ago

Evidence-backed signals, not a single score. Click any chip for the proof. Measured values stay read-only; unknown is honest.

reliability 99.9%
uptime 24h
100%
uptime 7d
100%
uptime 30d
99.9%
uptime 90d
99.9%
response p95
296ms
avg response
198ms
total checks
2,066

Measured on the unpaid 402 handshake, not the paid call. A service can 402 correctly and still fail after payment.

compliance A (14/14)

14 of 14 x402 conformance checks pass. Full checklist below.

jump to compliance checklist

price $0.05 (p84 in Data)
price (min)
$0.05
category percentile (min)
p84 in Data
endpoints / prices
14 / 1
model
flat
stability
0%
risk clean

No deterministic risk flag. Risk fires only on an exact blocklist match, or a reserved-brand name with a mismatched verified payTo. Never from low uptime, a high price, or a model guess.

domain age
83d
registrar
NameCheap, Inc.
hosting
custom
domain created
2026-05-20

Identity facts, not a risk score.

traction $11.492 30d · 6 buyers
volume 30d
$11.492
buyers 30d
6
settlements 30d
281
first settlement
2026-07-21
last settlement
2026-08-13
top buyer share
83% of 30d volume
trend 7d vs 30d
0.26x the 30d daily rate
networks
eip155:8453
volume all-time
$11.48
settlements all-time
281
median settlement 30d
$0.05
max settlement 30d
$0.08
settled via
coinbase ($11.49, 281 tx)

Conservative undercount: only USDC settlements via facilitators we measure are counted. A measured floor, not an estimate.

Top buyer share is a concentration signal, not part of the ranking score.

CHANGES

4 events, detecting since 2026-07-24

Payout, price, and schema changes detected on this service's x402 wire. A payout rotation at an unchanged price shows up here even when nothing else moves. Full feed at /changes.

changes price changed 17d ago (4 since 2026-07-24)

price changed · 17d ago

GET /x402/identity/entity/example · eip155:8453 · USDC: 1000050000

price changed · 17d ago

GET /x402/consumer/protection/example · eip155:8453 · USDC: 1000050000

GET /x402/cyber/threats/example · eip155:8453 · USDC: 1000050000

GET /x402/economic/indicators/example · eip155:8453 · USDC: 1000050000

GET /x402/environment/data/example · eip155:8453 · USDC: 1000050000

GET /x402/gov/spending/example · eip155:8453 · USDC: 1000050000

GET /x402/healthcare/records/example · eip155:8453 · USDC: 1000050000

GET /x402/legal/cases/example · eip155:8453 · USDC: 1000050000

GET /x402/regulations/law/example · eip155:8453 · USDC: 1000050000

GET /x402/research/papers/example · eip155:8453 · USDC: 1000050000

GET /x402/screen/sanctions/example · eip155:8453 · USDC: 1000050000

GET /x402/sec/filings/example · eip155:8453 · USDC: 1000050000

GET /x402/security/cve/CVE-2021-44228 · eip155:8453 · USDC: 1000050000

price changed · 18d ago

GET /x402/consumer/protection/example · eip155:8453 · USDC: 5000010000

GET /x402/cyber/threats/example · eip155:8453 · USDC: 5000010000

GET /x402/economic/indicators/example · eip155:8453 · USDC: 5000010000

GET /x402/environment/data/example · eip155:8453 · USDC: 5000010000

GET /x402/gov/spending/example · eip155:8453 · USDC: 5000010000

GET /x402/healthcare/records/example · eip155:8453 · USDC: 5000010000

GET /x402/legal/cases/example · eip155:8453 · USDC: 5000010000

GET /x402/regulations/law/example · eip155:8453 · USDC: 5000010000

GET /x402/research/papers/example · eip155:8453 · USDC: 5000010000

GET /x402/sec/filings/example · eip155:8453 · USDC: 5000010000

price changed · 18d ago

GET /x402/screen/sanctions/example · eip155:8453 · USDC: 8000010000

GET /x402/security/cve/CVE-2021-44228 · eip155:8453 · USDC: 8000010000

Amounts are on-wire atomic units in the named asset.

see all changes for this service

WHAT IT DOES

ai-derived

Provides access to various types of public record data including government filings, economic indicators, legal cases, and security vulnerabilities through an API marketplace.

category
data-marketplace
in
path
data-marketplacepublic-recordsgovernment-datasecuritylegaleconomicidentityhealthcare

AI-generated summary. The measured data is never altered by it.

ENDPOINTS

Service endpoints with HTTP method, path, description, pricing, and network
METHOD PATH DESCRIPTION PRICE NETWORK ASSET 402 CHANNEL
GET /x402/buy/standard/1174150 $0.05 Base USDC header
GET /x402/consumer/protection/example $0.05 Base USDC header
GET /x402/cyber/threats/example $0.05 Base USDC header
GET /x402/economic/indicators/example $0.05 Base USDC header
GET /x402/environment/data/example $0.05 Base USDC header
GET /x402/gov/spending/example $0.05 Base USDC header
GET /x402/healthcare/records/example $0.05 Base USDC header
GET /x402/identity/entity/example $0.05 Base USDC header
GET /x402/legal/cases/example $0.05 Base USDC header
GET /x402/regulations/law/example $0.05 Base USDC header
GET /x402/research/papers/example $0.05 Base USDC header
GET /x402/screen/sanctions/example $0.05 Base USDC header
GET /x402/sec/filings/example $0.05 Base USDC header
GET /x402/security/cve/CVE-2021-44228 $0.05 Base USDC header
14 endpoints

REQUEST / RESPONSE EXAMPLE

An unpaid request to GET /x402/buy/standard/1174150 returns HTTP 402 with the payment terms. Settle onchain via your facilitator, then retry with the X-Payment header.

// request
curl -i 'https://api.osf-master-server.com/x402/buy/standard/1174150'
// 402 response (captured by monitor) · 14 payloads · click to expand
[
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x72f62dE8b70d6CFa8Cc2dF6f21F243f289F3396c",
        "amount": "50000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://api.osf-master-server.com/x402/cyber/threats/:query",
      "tags": [
        "cve",
        "security",
        "cybersecurity",
        "threat intelligence",
        "vulnerability search",
        "CVE NVD",
        "exploited vulnerabilities",
        "MITRE ATT&CK"
      ],
      "mimeType": "application/json",
      "description": "Search cybersecurity intelligence by keyword, vendor, or product: the full NVD CVE corpus since 1988, CVE Program records, EU EUVD vulnerabilities, CISA KEV, 3,900+ CISA ICS advisories, EPSS scores, GitHub advisories, the full CWE catalog, and MITRE ATT&CK. Returns id, title, severity or score, and a provenance URL per match. For threat intel, vulnerability management, DevSecOps.",
      "serviceName": "Open Source Filings"
    },
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "type": "http",
            "method": "GET",
            "pathParams": {
              "query": "example"
            },
            "queryParams": {
              "format": "json"
            }
          },
          "output": {
            "type": "json",
            "example": {
              "result": "MATCHES_FOUND",
              "matches": [
                {
                  "id": "CVE-2021-44228",
                  "title": "Apache Log4j2 RCE",
                  "source": "CISA_KEV",
                  "record_id": 12345,
                  "severity_or_score": 10
                }
              ],
              "match_count": 2
            }
          }
        },
        "schema": {
          "type": "object",
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "required": [
            "input"
          ],
          "properties": {
            "input": {
              "type": "object",
              "required": [
                "type",
                "method"
              ],
              "properties": {
                "type": {
                  "type": "string",
                  "const": "http"
                },
                "method": {
                  "enum": [
                    "GET",
                    "HEAD",
                    "DELETE"
                  ],
                  "type": "string"
                },
                "pathParams": {
                  "type": "object",
                  "required": [
                    "query"
                  ],
                  "properties": {
                    "query": {
                      "type": "string",
                      "description": "Keyword(s): vendor, product, CVE id, or technique. E.g. 'Microsoft Exchange' or 'SQL injection'."
                    }
                  }
                },
                "queryParams": {
                  "type": "object",
                  "properties": {}
                }
              },
              "additionalProperties": false
            },
            "output": {
              "type": "object",
              "required": [
                "type"
              ],
              "properties": {
                "type": {
                  "type": "string"
                },
                "example": {
                  "type": "object"
                }
              }
            }
          }
        },
        "routeTemplate": "/x402/cyber/threats/:query"
      }
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x72f62dE8b70d6CFa8Cc2dF6f21F243f289F3396c",
        "amount": "50000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://api.osf-master-server.com/x402/consumer/protection/:query",
      "tags": [
        "recalls",
        "consumer complaints",
        "product recalls",
        "vehicle safety",
        "CFPB",
        "FDA recalls"
      ],
      "mimeType": "application/json",
      "description": "Search US consumer protection data by keyword: financial complaints (CFPB), vehicle recalls (NHTSA), product safety recalls (CPSC), and FDA recall enforcement for drugs, devices, and food (openFDA, full history since 2004). Returns product/company, complaint or recall details, dates, and a provenance URL per match. For consumer risk, product safety, and compliance agents.",
      "serviceName": "Open Source Filings"
    },
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "type": "http",
            "method": "GET",
            "pathParams": {
              "query": "example"
            },
            "queryParams": {
              "format": "json"
            }
          },
          "output": {
            "type": "json",
            "example": {
              "result": "MATCHES_FOUND",
              "matches": [
                {
                  "title": "Incorrect information on your report",
                  "source": "CFPB",
                  "record_id": 12345
                }
              ],
              "match_count": 1
            }
          }
        },
        "schema": {
          "type": "object",
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "required": [
            "input"
          ],
          "properties": {
            "input": {
              "type": "object",
              "required": [
                "type",
                "method"
              ],
              "properties": {
                "type": {
                  "type": "string",
                  "const": "http"
                },
                "method": {
                  "enum": [
                    "GET",
                    "HEAD",
                    "DELETE"
                  ],
                  "type": "string"
                },
                "pathParams": {
                  "type": "object",
                  "required": [
                    "query"
                  ],
                  "properties": {
                    "query": {
                      "type": "string",
                      "description": "Keyword(s): product, company, or issue. E.g. 'airbag recall' or 'mortgage complaint'."
                    }
                  }
                },
                "queryParams": {
                  "type": "object",
                  "properties": {}
                }
              },
              "additionalProperties": false
            },
            "output": {
              "type": "object",
              "required": [
                "type"
              ],
              "properties": {
                "type": {
                  "type": "string"
                },
                "example": {
                  "type": "object"
                }
              }
            }
          }
        },
        "routeTemplate": "/x402/consumer/protection/:query"
      }
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x72f62dE8b70d6CFa8Cc2dF6f21F243f289F3396c",
        "amount": "50000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://api.osf-master-server.com/x402/legal/cases/:query",
      "tags": [
        "case law",
        "court opinions",
        "SCOTUS",
        "citation lookup",
        "case name search",
        "appellate circuits",
        "SEC enforcement",
        "docket metadata",
        "legal research"
      ],
      "mimeType": "application/json",
      "description": "Look up US federal court cases by case name, party, court, or citation across 1.55 million+ opinion records: SCOTUS all time and all 13 federal appellate circuits (CourtListener), plus SEC litigation releases and SEC administrative proceedings. Returns case name, court, date, citations and a provenance URL per match. Case metadata and citations, not opinion full text.",
      "serviceName": "Open Source Filings"
    },
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "type": "http",
            "method": "GET",
            "pathParams": {
              "query": "example"
            },
            "queryParams": {
              "format": "json"
            }
          },
          "output": {
            "type": "json",
            "example": {
              "result": "MATCHES_FOUND",
              "matches": [
                {
                  "date": "1966-06-13",
                  "source": "COURTLISTENER",
                  "citations": "384 U.S. 436",
                  "record_id": 12345,
                  "case_or_title": "Miranda v. Arizona"
                }
              ],
              "match_count": 1
            }
          }
        },
        "schema": {
          "type": "object",
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "required": [
            "input"
          ],
          "properties": {
            "input": {
              "type": "object",
              "required": [
                "type",
                "method"
              ],
              "properties": {
                "type": {
                  "type": "string",
                  "const": "http"
                },
                "method": {
                  "enum": [
                    "GET",
                    "HEAD",
                    "DELETE"
                  ],
                  "type": "string"
                },
                "pathParams": {
                  "type": "object",
                  "required": [
                    "query"
                  ],
                  "properties": {
                    "query": {
                      "type": "string",
                      "description": "Keyword(s): case name, party, topic, citation, or court. E.g. 'miranda arizona' or 'ninth circuit qualified immunity'."
                    }
                  }
                },
                "queryParams": {
                  "type": "object",
                  "properties": {}
                }
              },
              "additionalProperties": false
            },
            "output": {
              "type": "object",
              "required": [
                "type"
              ],
              "properties": {
                "type": {
                  "type": "string"
                },
                "example": {
                  "type": "object"
                }
              }
            }
          }
        },
        "routeTemplate": "/x402/legal/cases/:query"
      }
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x72f62dE8b70d6CFa8Cc2dF6f21F243f289F3396c",
        "amount": "50000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://api.osf-master-server.com/x402/screen/sanctions/:name",
      "tags": [
        "sanctions",
        "ofac",
        "compliance",
        "kyc",
        "aml",
        "screening",
        "sanctions screening",
        "OFAC SDN",
        "EU sanctions",
        "UK sanctions",
        "UN sanctions",
        "AML compliance",
        "debarment"
      ],
      "mimeType": "application/json",
      "description": "Sanctions and watchlist screening across 11 authorities and 280,000+ parties in one call: OFAC SDN and Consolidated, EU, UK, UN, Trade.gov CSL, FBI Wanted, World Bank debarment, HHS OIG exclusions, SAM.gov exclusions, and Federal Reserve enforcement actions. Returns matched names, programs, provenance URLs, and an audit receipt. For AML compliance, KYC, KYB, and counterparty screening.",
      "serviceName": "Open Source Filings"
    },
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "type": "http",
            "method": "GET",
            "pathParams": {
              "name": "example"
            },
            "queryParams": {
              "format": "json"
            }
          },
          "output": {
            "type": "json",
            "example": {
              "query": "Vladimir Putin",
              "result": "POTENTIAL_MATCH",
              "matches": [
                {
                  "list": "EU_SANCTIONS",
                  "match_basis": "primary_name",
                  "matched_name": "PUTIN Vladimir Vladimirovich",
                  "provenance_url": "https://www.sanctionsmap.eu/"
                }
              ],
              "service": "OSF Sanctions Screening",
              "match_count": 1,
              "audit_receipt": {
                "screening_id": "uuid",
                "result_sha256": "..."
              },
              "coverage_note": "Screened against OFAC SDN, OFAC Consolidated (non-SDN), EU Consolidated, UK OFSI, and UN Security Council Consolidated sanctions lists, plus the Trade.gov Consolidated Screening List (denied and restricted parties), FBI Wanted notices, the World Bank Listing of Ineligible Firms and Individuals (debarments and cross debarments), the HHS OIG List of Excluded Individuals and Entities (federal healthcare program exclusions), the SAM.gov federal exclusions list (government wide debarments, suspensions, and ineligibilities), and Federal Reserve Board enforcement actions (banking prohibitions and related orders). This does NOT cover all global sanctions or watchlists.",
              "compliance_note": "A name match is a SCREENING SIGNAL, not a determination. Verify against the official source and follow your institution's escalation process before acting. Sanctions screening is a regulated activity.",
              "screening_evidence": {
                "totals": {
                  "records_in_scope": 291758,
                  "lists_screened_ok": 11,
                  "candidates_examined": 12
                },
                "clearance_statement": "On <ts> UTC, OSF screened the name '<name>' against 291,758 records across 11 of 11 configured lists ...",
                "negative_result_confidence": "complete_negative"
              }
            }
          }
        },
        "schema": {
          "type": "object",
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "required": [
            "input"
          ],
          "properties": {
            "input": {
              "type": "object",
              "required": [
                "type",
                "method"
              ],
              "properties": {
                "type": {
                  "type": "string",
                  "const": "http"
                },
                "method": {
                  "enum": [
                    "GET",
                    "HEAD",
                    "DELETE"
                  ],
                  "type": "string"
                },
                "pathParams": {
                  "type": "object"
                },
                "queryParams": {
                  "type": "object",
                  "required": [
                    "format"
                  ],
                  "properties": {
                    "format": {
                      "type": "string",
                      "description": "Response format (json)."
                    }
                  }
                }
              },
              "additionalProperties": false
            },
            "output": {
              "type": "object",
              "required": [
                "type"
              ],
              "properties": {
                "type": {
                  "type": "string"
                },
                "example": {
                  "type": "object",
                  "required": [
                    "service",
                    "query",
                    "result",
                    "match_count",
                    "matches",
                    "compliance_note",
                    "audit_receipt"
                  ],
                  "properties": {
                    "query": {
                      "type": "string"
                    },
                    "result": {
                      "type": "string",
                      "description": "POTENTIAL_MATCH or NO_MATCH"
                    },
                    "matches": {
                      "type": "array"
                    },
                    "service": {
                      "type": "string"
                    },
                    "match_count": {
                      "type": "integer"
                    },
                    "audit_receipt": {
                      "type": "object"
                    },
                    "coverage_note": {
                      "type": "string"
                    },
                    "compliance_note": {
                      "type": "string"
                    },
                    "screening_evidence": {
                      "type": "object",
                      "description": "Proof of work performed: per list record counts and ingest dates, how many candidate records were actually evaluated, the exact match criteria and their limitations, and a clearance statement. Makes a NO_MATCH auditable rather than merely asserted."
                    }
                  }
                }
              }
            }
          }
        },
        "routeTemplate": "/x402/screen/sanctions/:name"
      }
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x72f62dE8b70d6CFa8Cc2dF6f21F243f289F3396c",
        "amount": "50000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://api.osf-master-server.com/x402/identity/entity/:query",
      "tags": [
        "entity verification",
        "KYC",
        "KYB",
        "counterparty due diligence",
        "business registry"
      ],
      "mimeType": "application/json",
      "description": "Entity and counterparty verification by identifier or name. Resolves US healthcare providers (CMS NPI), legal entities (GLEIF LEI), US banks (FDIC), SEC filers (EDGAR CIK or ticker), and US tax exempt orgs (IRS EIN). Returns legal name, status, jurisdiction, identifiers, and a provenance URL to the official source. For KYC, KYB, due diligence, and onboarding agent workflows.",
      "serviceName": "Open Source Filings"
    },
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "type": "http",
            "method": "GET",
            "pathParams": {
              "query": "example"
            },
            "queryParams": {
              "format": "json"
            }
          },
          "output": {
            "type": "json",
            "example": {
              "query": "254900C6J3WN4F1AU607",
              "result": "FOUND",
              "matches": [
                {
                  "name": "Defiance KSM TipRanks Analyst ETF",
                  "registry": "GLEIF",
                  "identifier": "254900C6J3WN4F1AU607",
                  "entity_type": "legal_entity",
                  "match_basis": "identifier",
                  "jurisdiction": "US-DE",
                  "provenance_url": "https://search.gleif.org/#/record/254900C6J3WN4F1AU607",
                  "identifier_type": "LEI"
                }
              ],
              "service": "OSF Identity - Entity Lookup",
              "match_count": 1,
              "audit_receipt": {
                "lookup_id": "uuid",
                "result_sha256": "..."
              },
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              "matches": [
                {
                  "doi": "10.5555/3295222.3295349",
                  "year": 2017,
                  "title": "Attention Is All You Need",
                  "venue": "NeurIPS",
                  "source": "CROSSREF",
                  "record_id": 12345
                }
              ],
              "match_count": 2
            }
          }
        },
        "schema": {
          "type": "object",
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "required": [
            "input"
          ],
          "properties": {
            "input": {
              "type": "object",
              "required": [
                "type",
                "method"
              ],
              "properties": {
                "type": {
                  "type": "string",
                  "const": "http"
                },
                "method": {
                  "enum": [
                    "GET",
                    "HEAD",
                    "DELETE"
                  ],
                  "type": "string"
                },
                "pathParams": {
                  "type": "object",
                  "required": [
                    "query"
                  ],
                  "properties": {
                    "query": {
                      "type": "string",
                      "description": "Keyword(s): topic, author, title terms, or DOI. E.g. 'CRISPR off-target' or 'transformer attention'."
                    }
                  }
                },
                "queryParams": {
                  "type": "object",
                  "properties": {}
                }
              },
              "additionalProperties": false
            },
            "output": {
              "type": "object",
              "required": [
                "type"
              ],
              "properties": {
                "type": {
                  "type": "string"
                },
                "example": {
                  "type": "object"
                }
              }
            }
          }
        },
        "routeTemplate": "/x402/research/papers/:query"
      }
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x72f62dE8b70d6CFa8Cc2dF6f21F243f289F3396c",
        "amount": "50000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://api.osf-master-server.com/x402/gov/spending/:query",
      "tags": [
        "federal contracts",
        "government spending",
        "govcon awards",
        "solicitations",
        "grant funding"
      ],
      "mimeType": "application/json",
      "description": "Search US federal spending by keyword: contract awards (USAspending), open solicitations (SAM.gov), and grant funding opportunities (Grants.gov) in one call. Returns recipient or agency, dollar amount, dates, NAICS, and a provenance URL to the official source per match. For govcon market intelligence, competitor award tracking, and procurement agents.",
      "serviceName": "Open Source Filings"
    },
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "type": "http",
            "method": "GET",
            "pathParams": {
              "query": "example"
            },
            "queryParams": {
              "format": "json"
            }
          },
          "output": {
            "type": "json",
            "example": {
              "result": "MATCHES_FOUND",
              "matches": [
                {
                  "title": "MONO MACHINES LLC",
                  "agency": "General Services Administration",
                  "amount": 3868.5,
                  "source": "USASPENDING",
                  "record_id": 12345,
                  "provenance_url": "https://www.usaspending.gov/award/..."
                }
              ],
              "match_count": 2
            }
          }
        },
        "schema": {
          "type": "object",
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "required": [
            "input"
          ],
          "properties": {
            "input": {
              "type": "object",
              "required": [
                "type",
                "method"
              ],
              "properties": {
                "type": {
                  "type": "string",
                  "const": "http"
                },
                "method": {
                  "enum": [
                    "GET",
                    "HEAD",
                    "DELETE"
                  ],
                  "type": "string"
                },
                "pathParams": {
                  "type": "object",
                  "required": [
                    "query"
                  ],
                  "properties": {
                    "query": {
                      "type": "string",
                      "description": "Keyword(s): recipient, agency, NAICS, program, or subject. E.g. 'radar navy' or 'maritime grant'."
                    }
                  }
                },
                "queryParams": {
                  "type": "object",
                  "properties": {}
                }
              },
              "additionalProperties": false
            },
            "output": {
              "type": "object",
              "required": [
                "type"
              ],
              "properties": {
                "type": {
                  "type": "string"
                },
                "example": {
                  "type": "object"
                }
              }
            }
          }
        },
        "routeTemplate": "/x402/gov/spending/:query"
      }
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x72f62dE8b70d6CFa8Cc2dF6f21F243f289F3396c",
        "amount": "50000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://api.osf-master-server.com/x402/security/cve/:cve_id",
      "tags": [
        "cve",
        "vulnerability",
        "exploit",
        "security",
        "CVE lookup",
        "exploited vulnerabilities",
        "CISA KEV",
        "EPSS score",
        "vulnerability management"
      ],
      "mimeType": "application/json",
      "description": "CVE lookup and exploit check by CVE id. Answers is this CVE actively exploited in the wild using the US CISA Known Exploited Vulnerabilities (KEV) catalog, with the EPSS exploitation probability score and CVSS severity. Each field carries a provenance URL to the official US source. For vulnerability management, patch prioritization, threat intelligence, and DevSecOps agents.",
      "serviceName": "Open Source Filings"
    },
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "type": "http",
            "method": "GET",
            "pathParams": {
              "cve_id": "CVE-2021-44228"
            },
            "queryParams": {
              "format": "json"
            }
          },
          "output": {
            "type": "json",
            "example": {
              "nvd": {
                "cvss_severity": "CRITICAL"
              },
              "epss": {
                "epss_probability": 0.984,
                "exploitation_band": "Critical"
              },
              "query": "CVE-2026-33017",
              "result": "FOUND",
              "service": "OSF Security - CVE Exploit Check",
              "audit_receipt": {
                "check_id": "uuid",
                "result_sha256": "..."
              },
              "coverage_note": "Direct lookup against the US CISA Known Exploited Vulnerabilities (KEV) catalog, the FIRST EPSS model score, and the NVD CVE record. 'actively_exploited' reflects presence on the CISA KEV catalog ONLY. A CVE that is NOT on KEV is not necessarily safe or unexploitable - it simply is not on CISA's confirmed-exploited list. EPSS is a probability estimate, not proof.",
              "compliance_note": "This is a decision-support signal, not a guarantee. Confirm against the linked authoritative sources (cisa.gov, nvd.nist.gov, first.org) before acting.",
              "provenance_urls": {
                "cisa_kev": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog"
              },
              "actively_exploited": true,
              "exploitation_summary": "ON the CISA KEV catalog - confirmed exploited in the wild."
            }
          }
        },
        "schema": {
          "type": "object",
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "required": [
            "input"
          ],
          "properties": {
            "input": {
              "type": "object",
              "required": [
                "type",
                "method"
              ],
              "properties": {
                "type": {
                  "type": "string",
                  "const": "http"
                },
                "method": {
                  "enum": [
                    "GET",
                    "HEAD",
                    "DELETE"
                  ],
                  "type": "string"
                },
                "pathParams": {
                  "type": "object"
                },
                "queryParams": {
                  "type": "object",
                  "required": [
                    "format"
                  ],
                  "properties": {
                    "format": {
                      "type": "string",
                      "description": "Response format (json)."
                    }
                  }
                }
              },
              "additionalProperties": false
            },
            "output": {
              "type": "object",
              "required": [
                "type"
              ],
              "properties": {
                "type": {
                  "type": "string"
                },
                "example": {
                  "type": "object",
                  "required": [
                    "service",
                    "query",
                    "result",
                    "actively_exploited",
                    "compliance_note",
                    "audit_receipt"
                  ],
                  "properties": {
                    "nvd": {
                      "type": "object"
                    },
                    "epss": {
                      "type": "object"
                    },
                    "query": {
                      "type": "string"
                    },
                    "result": {
                      "type": "string",
                      "description": "FOUND, NOT_FOUND, or INVALID_INPUT"
                    },
                    "service": {
                      "type": "string"
                    },
                    "audit_receipt": {
                      "type": "object"
                    },
                    "coverage_note": {
                      "type": "string"
                    },
                    "compliance_note": {
                      "type": "string"
                    },
                    "provenance_urls": {
                      "type": "object"
                    },
                    "actively_exploited": {
                      "type": "boolean",
                      "description": "True if on the CISA KEV catalog."
                    },
                    "exploitation_summary": {
                      "type": "string"
                    }
                  }
                }
              }
            }
          }
        },
        "routeTemplate": "/x402/security/cve/:cve_id"
      }
    },
    "x402Version": 2
  }
]

OVER TIME

All charts use the 30d selector; each series spans only the dates it has data for. Every series is also served as JSON at /api/v1/services/open-source-filings-osf/price, /scores, /volume and /buyers. On-chain volume and distinct buyers are measured over the service's settlement address and are a conservative undercount (only settlements that reach a measured facilitator are counted). The on-chain series roll up hourly, so the latest day can be up to about an hour behind; distinct buyers are counted per payout address, so a service that settles to more than one address is an upper bound.

UPTIME
07-21 · uptime 100.0% · 206ms avg07-22 · uptime 100.0% · 193ms avg07-23 · uptime 100.0% · 158ms avg07-24 · uptime 100.0% · 181ms avg07-25 · uptime 98.9% · 167ms avg07-26 · uptime 100.0% · 155ms avg07-27 · uptime 100.0% · 147ms avg07-28 · uptime 100.0% · 124ms avg07-29 · uptime 97.8% · 177ms avg07-30 · uptime 100.0% · 134ms avg07-31 · uptime 100.0% · 133ms avg08-01 · uptime 100.0% · 189ms avg08-02 · uptime 100.0% · 268ms avg08-03 · uptime 100.0% · 273ms avg08-04 · uptime 100.0% · 282ms avg08-05 · uptime 100.0% · 307ms avg08-06 · uptime 100.0% · 265ms avg08-07 · uptime 100.0% · 295ms avg08-08 · uptime 100.0% · 208ms avg08-09 · uptime 100.0% · 189ms avg08-10 · uptime 100.0% · 181ms avg08-11 · uptime 100.0% · 216ms avg08-12 · uptime 100.0% · 167ms avg08-13 · uptime 100.0% · 100ms avg07-2108-13
30d UPTIME 99.9%
RESPONSE TIME
07-21 · 206ms avg07-21 · 206ms avg07-22 · 193ms avg07-22 · 193ms avg07-23 · 158ms avg07-23 · 158ms avg07-24 · 181ms avg07-24 · 181ms avg07-25 · 167ms avg07-25 · 167ms avg07-26 · 155ms avg07-26 · 155ms avg07-27 · 147ms avg07-27 · 147ms avg07-28 · 124ms avg07-28 · 124ms avg07-29 · 177ms avg07-29 · 177ms avg07-30 · 134ms avg07-30 · 134ms avg07-31 · 133ms avg07-31 · 133ms avg08-01 · 189ms avg08-01 · 189ms avg08-02 · 268ms avg08-02 · 268ms avg08-03 · 273ms avg08-03 · 273ms avg08-04 · 282ms avg08-04 · 282ms avg08-05 · 307ms avg08-05 · 307ms avg08-06 · 265ms avg08-06 · 265ms avg08-07 · 295ms avg08-07 · 295ms avg08-08 · 208ms avg08-08 · 208ms avg08-09 · 189ms avg08-09 · 189ms avg08-10 · 181ms avg08-10 · 181ms avg08-11 · 216ms avg08-11 · 216ms avg08-12 · 167ms avg08-12 · 167ms avg08-13 · 100ms avg08-13 · 100ms avg07-2108-13
AVG RESP 198ms
PRICE (captured 402, USD)
07-21 · $0.0507-26 · $0.0107-27 · $0.0508-13 · $0.05$0.0507-2108-13

Median across 14 endpoints. Use the selector to isolate one.

SUB-SCORES (uptime + x402 compliance)
07-21 uptime: 100.0% compliance: 100% checks07-22 uptime: 100.0% compliance: 100% checks07-23 uptime: 100.0% compliance: 100% checks07-24 uptime: 100.0% compliance: 100% checks07-25 uptime: 99.7% compliance: 100% checks07-26 uptime: 99.8% compliance: 100% checks07-27 uptime: 99.8% compliance: 100% checks07-28 uptime: 99.8% compliance: 100% checks07-29 uptime: 99.9% compliance: 100% checks07-30 uptime: 99.6% compliance: 100% checks07-31 uptime: 99.7% compliance: 100% checks08-01 uptime: 99.7% compliance: 100% checks08-02 uptime: 99.7% compliance: 100% checks08-03 uptime: 99.7% compliance: 100% checks08-04 uptime: 99.8% compliance: 100% checks08-05 uptime: 99.8% compliance: 100% checks08-06 uptime: 99.8% compliance: 100% checks08-07 uptime: 99.8% compliance: 100% checks08-08 uptime: 99.8% compliance: 100% checks08-09 uptime: 99.8% compliance: 100% checks08-10 uptime: 99.8% compliance: 100% checks08-11 uptime: 99.8% compliance: 100% checks08-12 uptime: 99.8% compliance: 100% checks08-13 uptime: 99.9% compliance: 100% checksuptimecompliance07-2108-13

checklist grew 11->14 on 2026-07-28; a step here is a metric change, not a regression

PILLARS OVER TIME (measured)

Measured site and economics pillars from the assessment history, so the latest value shown elsewhere on this page reads as a point on a trend rather than a permanent state.

VOLUME (on-chain settlement, USD)
07-21 · $107-22 · $0.6407-23 · $0.4207-24 · $0.3207-25 · $207-26 · $0.3307-27 · $107-28 · $0.3007-29 · $0.1107-30 · $0.1007-31 · $0.1508-01 · $0.3008-02 · $208-03 · $0.9508-04 · $0.2508-05 · $0.1008-06 · $0.1008-07 · $0.1008-08 · $0.1008-09 · $0.1008-10 · $0.1008-11 · $0.1008-12 · $0.1008-13 · $0.10peak $207-2108-13
DISTINCT BUYERS
07-21 · 3 buyers07-22 · 3 buyers07-23 · 2 buyers07-24 · 2 buyers07-25 · 2 buyers07-26 · 2 buyers07-27 · 2 buyers07-28 · 2 buyers07-29 · 1 buyer07-30 · 1 buyer07-31 · 2 buyers08-01 · 1 buyer08-02 · 1 buyer08-03 · 1 buyer08-04 · 1 buyer08-05 · 1 buyer08-06 · 1 buyer08-07 · 1 buyer08-08 · 1 buyer08-09 · 1 buyer08-10 · 1 buyer08-11 · 1 buyer08-12 · 1 buyer08-13 · 1 buyerpeak 3 buyers07-2108-13

COMPLIANCE

14/14 checks pass · grade A

last 402 captured 2026-07-27 · last up 2026-08-13

  • 402 payload captured
  • accepts[] array present
  • payTo address recoverable
  • payTo at accepts[0].payTo (conformant shape)
  • payTo is a valid on-chain address
  • atomic price declared
  • atomic price in a sane range
  • asset (token) address declared
  • network resolves to CAIP-2
  • payment scheme declared
  • served over HTTPS
  • declares the current x402 version (2)
  • EIP-712 domain parameters present on every EVM entry
  • x402 v2 envelope delivered in the payment-required header

SITE PILLARS

  • homepage reachable
  • openapi doc
  • pricing page
  • llms.txt
  • robots.txt
  • terms page
recent checks (18) live · click to expand
TIME STATUS RESP CAUSE
● OK 108ms
● OK 95ms
● OK 113ms
● OK 102ms
● OK 75ms
● OK 81ms
● SLOW 335ms
● OK 123ms
● OK 115ms
● OK 105ms
● OK 102ms
● OK 90ms
● OK 77ms
● OK 83ms
● OK 105ms
● OK 79ms
● OK 79ms
● OK 93ms

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