x402 List

x402 Protocol Service Directory

Otto AI

AI PAYMENT-READY

payment-ready until 2026-08-20

AI-powered DeFi assistant swarm — 37 services covering market intel, news, token analytics, trading execution. Multi-chain (Base, Polygon, Solana).

Pay from $0.001 to $0.05 per request in USDC on Base / Polygon / Solana, settled onchain via the x402 protocol, no signup, no API key needed.

first settlement 2026-01-26 · $322.54 all-time · settled via coinbase

BASE URL https://x402.ottoai.services WEBSITE https://useotto.xyz ENDPOINTS 3 NETWORK Base / Polygon / Solana ASSET USDC MEMBER SINCE 2026-01-29 MONITORED SINCE 2026-04-15

ASSESSMENT

updated 4h ago

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

reliability 100%
uptime 24h
100%
uptime 7d
100%
uptime 30d
100%
uptime 90d
99.8%
response p95
450ms
avg response
235ms
total checks
7,304

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 $0.001 to $0.05 (p8 in AI)
price (min)
$0.001
price (max)
$0.05
category percentile (min)
p8 in AI
category percentile (max)
p43 in AI
endpoints / prices
3 / 2
model
tiered
stability
100%
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
-
registrar
-
hosting
custom
domain created
---

Identity facts, not a risk score.

traction $152.405 30d · 436 buyers
volume 30d
$152.405
buyers 30d
436
settlements 30d
85,849
first settlement
2026-01-26
last settlement
2026-08-13
top buyer share
80% of 30d volume
trend 7d vs 30d
0.12x the 30d daily rate
networks
eip155:137, eip155:8453, solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdpKuc147dw2N9d
volume all-time
$322.54
settlements all-time
132,336
median settlement 30d
$0.001
max settlement 30d
$1.396
settled via
coinbase ($152.41, 85,849 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

2 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 schema changed 3d ago (2 since 2026-07-24)

schema changed · 3d ago

schema removed GET /crypto-news exact solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v USDC 2 300 {"feePayer":"D6ZhtNQ5nT9ZnTHUbqXZsTx5MH2rPFiBBggX4hY1WePM"}

schema removed GET /mega-report exact solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v USDC 2 300 {"feePayer":"D6ZhtNQ5nT9ZnTHUbqXZsTx5MH2rPFiBBggX4hY1WePM"}

schema removed GET /token-details exact solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v USDC 2 300 {"feePayer":"D6ZhtNQ5nT9ZnTHUbqXZsTx5MH2rPFiBBggX4hY1WePM"}

schema added GET /crypto-news exact solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v USDC 2 300 {"feePayer":"BENrLoUbndxoNMUS5JXApGMtNykLjFXXixMtpDwDR9SP"}

schema added GET /mega-report exact solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v USDC 2 300 {"feePayer":"BENrLoUbndxoNMUS5JXApGMtNykLjFXXixMtpDwDR9SP"}

schema added GET /token-details exact solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v USDC 2 300 {"feePayer":"BENrLoUbndxoNMUS5JXApGMtNykLjFXXixMtpDwDR9SP"}

schema changed · 3d ago

schema removed GET /crypto-news exact solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v USDC 2 300 {"feePayer":"BFK9TLC3edb13K6v4YyH3DwPb5DSUpkWvb7XnqCL9b4F"}

schema removed GET /mega-report exact solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v USDC 2 300 {"feePayer":"BFK9TLC3edb13K6v4YyH3DwPb5DSUpkWvb7XnqCL9b4F"}

schema removed GET /token-details exact solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v USDC 2 300 {"feePayer":"BFK9TLC3edb13K6v4YyH3DwPb5DSUpkWvb7XnqCL9b4F"}

schema added GET /crypto-news exact solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v USDC 2 300 {"feePayer":"D6ZhtNQ5nT9ZnTHUbqXZsTx5MH2rPFiBBggX4hY1WePM"}

schema added GET /mega-report exact solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v USDC 2 300 {"feePayer":"D6ZhtNQ5nT9ZnTHUbqXZsTx5MH2rPFiBBggX4hY1WePM"}

schema added GET /token-details exact solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v USDC 2 300 {"feePayer":"D6ZhtNQ5nT9ZnTHUbqXZsTx5MH2rPFiBBggX4hY1WePM"}

see all changes for this service

WHAT IT DOES

ai-derived

No AI synthesis has been produced for this service yet.

ENDPOINTS

Service endpoints with HTTP method, path, description, pricing, and network
METHOD PATH DESCRIPTION PRICE NETWORK ASSET 402 CHANNEL
GET /crypto-news Crypto news stream $0.001 Base/Polygon/Solana USDC header
GET /mega-report Comprehensive research report $0.05 Base/Polygon/Solana USDC header
GET /token-details Token analytics $0.001 Base/Polygon/Solana USDC header
3 endpoints

REQUEST / RESPONSE EXAMPLE

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

// request
curl -i 'https://x402.ottoai.services/crypto-news'
// 402 response (captured by monitor) · 3 payloads · click to expand
[
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x0E84dDEdAaE6A779c462C22a59F301EC31B6b808",
        "amount": "1000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      },
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2",
          "assetTransferMethod": "permit2"
        },
        "payTo": "0x0E84dDEdAaE6A779c462C22a59F301EC31B6b808",
        "amount": "1000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      },
      {
        "asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x0E84dDEdAaE6A779c462C22a59F301EC31B6b808",
        "amount": "1000",
        "scheme": "exact",
        "network": "eip155:137",
        "maxTimeoutSeconds": 300
      },
      {
        "asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
        "extra": {
          "name": "USD Coin",
          "version": "2",
          "assetTransferMethod": "permit2"
        },
        "payTo": "0x0E84dDEdAaE6A779c462C22a59F301EC31B6b808",
        "amount": "1000",
        "scheme": "exact",
        "network": "eip155:137",
        "maxTimeoutSeconds": 300
      },
      {
        "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
        "extra": {
          "feePayer": "BENrLoUbndxoNMUS5JXApGMtNykLjFXXixMtpDwDR9SP"
        },
        "payTo": "6XcSfqJHr9vNW2vbiRaMqUYVm7shDgLepca54wUTDPN5",
        "amount": "1000",
        "scheme": "exact",
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://x402.ottoai.services/token-details",
      "tags": [
        "token price",
        "market cap",
        "token metrics",
        "token info",
        "price data"
      ],
      "iconUrl": "https://x402.ottoai.services/assets/otto-icon.png",
      "mimeType": "application/json",
      "description": "Token price, market cap, volume, supply, and basic metrics. Works for any listed token.",
      "serviceName": "Otto AI"
    },
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "type": "http",
            "method": "GET",
            "queryParams": {
              "symbol": "BTC"
            }
          },
          "output": {
            "type": "json",
            "example": {
              "data": {
                "details": "=== TOKEN DATA INTELLIGENCE: BTC ===\nGenerated: 2026-06-10T12:00:00Z\n\nToken Overview\n• Name: Bitcoin (BTC)\n• Rank: #1\n• Price: $104250.00\n• Market Cap: $2.05T\n• FDV: $2.19T\n\nToday's Price Action (UTC)\n• Open: $103800.00 | High: $105120.00 | Low: $102940.00 | Current: $104250.00\n• Today's Trend: Up (+0.43% from open)\n\nPrice Performance\n• 1h: +0.12% | 24h: +1.85% | 7d: -2.40% | 30d: +6.10%\n\n📊 Volume Review\n• Volume (24h): $38420.50M | Volume/MCap Ratio: 1.87% | Market Pairs: 11240\n• Liquidity Score: High\n\nToken Supply\n• Circulating: 19.92M | Max Supply: 21.00M | Supply Ratio: 94.9%\n\nMomentum Signal\n• Momentum: 📊 Cooling Off (DYOR)\n\n📝 PROJECT INFO\n• Website, X profile, explorer, token address, and listing date included in the full report"
              },
              "meta": {
                "degraded": false,
                "generatedAt": "2026-08-10T12:00:00.000Z",
                "sourceHealth": {
                  "market-alpha-internal": "unknown"
                }
              },
              "status": "success"
            }
          }
        },
        "schema": {
          "type": "object",
          "$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"
                  ],
                  "type": "string"
                },
                "queryParams": {
                  "type": "object",
                  "required": [
                    "symbol"
                  ],
                  "properties": {
                    "symbol": {
                      "type": "string",
                      "description": "Token symbol (e.g., BTC, ETH, SOL, PEPE)"
                    }
                  }
                }
              },
              "additionalProperties": false
            },
            "output": {
              "type": "object",
              "required": [
                "type"
              ],
              "properties": {
                "type": {
                  "type": "string"
                },
                "example": {
                  "type": "object",
                  "required": [
                    "status",
                    "data",
                    "meta"
                  ],
                  "properties": {
                    "data": {
                      "description": "Token details object on success, error string on failure"
                    },
                    "meta": {
                      "type": "object",
                      "required": [
                        "generatedAt",
                        "degraded",
                        "sourceHealth"
                      ],
                      "properties": {
                        "degraded": {
                          "type": "boolean"
                        },
                        "generatedAt": {
                          "type": "string"
                        },
                        "sourceHealth": {
                          "type": "object"
                        },
                        "stalenessSec": {
                          "type": [
                            "number",
                            "null"
                          ]
                        }
                      },
                      "description": "Freshness. generatedAt = when we built this response. stalenessSec = age of our cached snapshot, absent on live pass-throughs. dataAsOf = vintage of the observations. degraded = an older good version was served."
                    },
                    "status": {
                      "enum": [
                        "success",
                        "failed"
                      ],
                      "type": "string"
                    }
                  }
                }
              }
            }
          }
        }
      },
      "builder-code": {
        "info": {
          "a": "bc_hc2dhq09"
        },
        "schema": {
          "type": "object",
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "a": {
              "type": "string",
              "pattern": "^[a-z0-9_]{1,32}$",
              "description": "App builder code"
            },
            "s": {
              "type": "array",
              "items": {
                "type": "string",
                "pattern": "^[a-z0-9_]{1,32}$"
              },
              "description": "Service builder codes"
            },
            "w": {
              "type": "string",
              "pattern": "^[a-z0-9_]{1,32}$",
              "description": "Wallet builder code"
            }
          },
          "additionalProperties": false
        }
      },
      "offer-receipt": {
        "info": {
          "offers": [
            {
              "format": "eip712",
              "payload": {
                "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
                "payTo": "0x0E84dDEdAaE6A779c462C22a59F301EC31B6b808",
                "amount": "1000",
                "scheme": "exact",
                "network": "eip155:8453",
                "version": 1,
                "validUntil": 1786364283,
                "resourceUrl": "https://x402.ottoai.services/token-details"
              },
              "signature": "0x70ceb5f0541b01c0287207da3d46d4446d2c1aab62908b0671a2cba8c8562fa26b6c4cdef3e4a4e020a27a01ada21c0c8df6f500cba5dee596853ba1a3c080b91c",
              "acceptIndex": 0
            },
            {
              "format": "eip712",
              "payload": {
                "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
                "payTo": "0x0E84dDEdAaE6A779c462C22a59F301EC31B6b808",
                "amount": "1000",
                "scheme": "exact",
                "network": "eip155:8453",
                "version": 1,
                "validUntil": 1786364283,
                "resourceUrl": "https://x402.ottoai.services/token-details"
              },
              "signature": "0x70ceb5f0541b01c0287207da3d46d4446d2c1aab62908b0671a2cba8c8562fa26b6c4cdef3e4a4e020a27a01ada21c0c8df6f500cba5dee596853ba1a3c080b91c",
              "acceptIndex": 1
            },
            {
              "format": "eip712",
              "payload": {
                "asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
                "payTo": "0x0E84dDEdAaE6A779c462C22a59F301EC31B6b808",
                "amount": "1000",
                "scheme": "exact",
                "network": "eip155:137",
                "version": 1,
                "validUntil": 1786364283,
                "resourceUrl": "https://x402.ottoai.services/token-details"
              },
              "signature": "0x4898f0da05ea54f08e725f535c1dbe17581660429afe3888d64e8b69c6464dc41bbe5880c7518e4b3047147876a9ad660d7d0cbe659cbc9b355ad25b0f0f787d1b",
              "acceptIndex": 2
            },
            {
              "format": "eip712",
              "payload": {
                "asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
                "payTo": "0x0E84dDEdAaE6A779c462C22a59F301EC31B6b808",
                "amount": "1000",
                "scheme": "exact",
                "network": "eip155:137",
                "version": 1,
                "validUntil": 1786364283,
                "resourceUrl": "https://x402.ottoai.services/token-details"
              },
              "signature": "0x4898f0da05ea54f08e725f535c1dbe17581660429afe3888d64e8b69c6464dc41bbe5880c7518e4b3047147876a9ad660d7d0cbe659cbc9b355ad25b0f0f787d1b",
              "acceptIndex": 3
            },
            {
              "format": "eip712",
              "payload": {
                "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
                "payTo": "6XcSfqJHr9vNW2vbiRaMqUYVm7shDgLepca54wUTDPN5",
                "amount": "1000",
                "scheme": "exact",
                "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
                "version": 1,
                "validUntil": 1786364283,
                "resourceUrl": "https://x402.ottoai.services/token-details"
              },
              "signature": "0x0281f6273226fb00309df4d00459c3791c75d527720b2d24fbbcc5b114166f1564646560e62efd85ed015b361e35122bde413f3c92d642aae352ef42bead92fd1c",
              "acceptIndex": 4
            }
          ]
        },
        "schema": {
          "type": "object",
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "required": [
            "offers"
          ],
          "properties": {
            "offers": {
              "type": "array",
              "items": {
                "type": "object",
                "required": [
                  "format",
                  "signature"
                ],
                "properties": {
                  "format": {
                    "type": "string"
                  },
                  "payload": {
                    "type": "object",
                    "required": [
                      "version",
                      "resourceUrl",
                      "scheme",
                      "network",
                      "asset",
                      "payTo",
                      "amount"
                    ],
                    "properties": {
                      "asset": {
                        "type": "string"
                      },
                      "payTo": {
                        "type": "string"
                      },
                      "amount": {
                        "type": "string"
                      },
                      "scheme": {
                        "type": "string"
                      },
                      "network": {
                        "type": "string"
                      },
                      "version": {
                        "type": "integer"
                      },
                      "validUntil": {
                        "type": "integer"
                      },
                      "resourceUrl": {
                        "type": "string"
                      }
                    }
                  },
                  "signature": {
                    "type": "string"
                  },
                  "acceptIndex": {
                    "type": "integer"
                  }
                }
              }
            }
          }
        }
      },
      "sign-in-with-x": {
        "info": {
          "uri": "https://x402.ottoai.services/token-details",
          "nonce": "47bff2b24599994f4ecd1ff7de73dcf0",
          "domain": "x402.ottoai.services",
          "version": "1",
          "issuedAt": "2026-08-10T12:13:03.568Z",
          "resources": [
            "https://x402.ottoai.services/token-details"
          ],
          "statement": "Sign in to access Otto AI market intelligence"
        },
        "schema": {
          "type": "object",
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "required": [
            "domain",
            "address",
            "uri",
            "version",
            "chainId",
            "type",
            "nonce",
            "issuedAt",
            "signature"
          ],
          "properties": {
            "uri": {
              "type": "string",
              "format": "uri"
            },
            "type": {
              "type": "string"
            },
            "nonce": {
              "type": "string"
            },
            "domain": {
              "type": "string"
            },
            "address": {
              "type": "string"
            },
            "chainId": {
              "type": "string"
            },
            "version": {
              "type": "string"
            },
            "issuedAt": {
              "type": "string",
              "format": "date-time"
            },
            "notBefore": {
              "type": "string",
              "format": "date-time"
            },
            "requestId": {
              "type": "string"
            },
            "resources": {
              "type": "array",
              "items": {
                "type": "string",
                "format": "uri"
              }
            },
            "signature": {
              "type": "string"
            },
            "statement": {
              "type": "string"
            },
            "expirationTime": {
              "type": "string",
              "format": "date-time"
            }
          }
        },
        "supportedChains": [
          {
            "type": "eip191",
            "chainId": "eip155:8453"
          },
          {
            "type": "eip191",
            "chainId": "eip155:137"
          },
          {
            "type": "ed25519",
            "chainId": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp"
          }
        ]
      },
      "otto-content-receipt": {}
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0x0E84dDEdAaE6A779c462C22a59F301EC31B6b808",
        "amount": "1000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      },
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2",
          "assetTransferMethod": "permit2"
        },
        "payTo": "0x0E84dDEdAaE6A779c462C22a59F301EC31B6b808",
        "amount": "1000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      },
      {
        "asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
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                "type": "object",
                "required": [
                  "format",
                  "signature"
                ],
                "properties": {
                  "format": {
                    "type": "string"
                  },
                  "payload": {
                    "type": "object",
                    "required": [
                      "version",
                      "resourceUrl",
                      "scheme",
                      "network",
                      "asset",
                      "payTo",
                      "amount"
                    ],
                    "properties": {
                      "asset": {
                        "type": "string"
                      },
                      "payTo": {
                        "type": "string"
                      },
                      "amount": {
                        "type": "string"
                      },
                      "scheme": {
                        "type": "string"
                      },
                      "network": {
                        "type": "string"
                      },
                      "version": {
                        "type": "integer"
                      },
                      "validUntil": {
                        "type": "integer"
                      },
                      "resourceUrl": {
                        "type": "string"
                      }
                    }
                  },
                  "signature": {
                    "type": "string"
                  },
                  "acceptIndex": {
                    "type": "integer"
                  }
                }
              }
            }
          }
        }
      },
      "sign-in-with-x": {
        "info": {
          "uri": "https://x402.ottoai.services/mega-report",
          "nonce": "ee1b73b4479922cfb79ab64d77b8ce62",
          "domain": "x402.ottoai.services",
          "version": "1",
          "issuedAt": "2026-08-10T12:13:03.630Z",
          "resources": [
            "https://x402.ottoai.services/mega-report"
          ],
          "statement": "Sign in to access Otto AI market intelligence"
        },
        "schema": {
          "type": "object",
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "required": [
            "domain",
            "address",
            "uri",
            "version",
            "chainId",
            "type",
            "nonce",
            "issuedAt",
            "signature"
          ],
          "properties": {
            "uri": {
              "type": "string",
              "format": "uri"
            },
            "type": {
              "type": "string"
            },
            "nonce": {
              "type": "string"
            },
            "domain": {
              "type": "string"
            },
            "address": {
              "type": "string"
            },
            "chainId": {
              "type": "string"
            },
            "version": {
              "type": "string"
            },
            "issuedAt": {
              "type": "string",
              "format": "date-time"
            },
            "notBefore": {
              "type": "string",
              "format": "date-time"
            },
            "requestId": {
              "type": "string"
            },
            "resources": {
              "type": "array",
              "items": {
                "type": "string",
                "format": "uri"
              }
            },
            "signature": {
              "type": "string"
            },
            "statement": {
              "type": "string"
            },
            "expirationTime": {
              "type": "string",
              "format": "date-time"
            }
          }
        },
        "supportedChains": [
          {
            "type": "eip191",
            "chainId": "eip155:8453"
          },
          {
            "type": "eip191",
            "chainId": "eip155:137"
          },
          {
            "type": "ed25519",
            "chainId": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp"
          }
        ]
      },
      "otto-content-receipt": {}
    },
    "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/otto-ai/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
07-15 · uptime 100.0% · 218ms avg07-16 · uptime 100.0% · 234ms avg07-17 · uptime 100.0% · 216ms avg07-18 · uptime 100.0% · 196ms avg07-19 · uptime 100.0% · 184ms avg07-20 · uptime 100.0% · 194ms avg07-21 · uptime 100.0% · 192ms avg07-22 · uptime 100.0% · 206ms avg07-23 · uptime 100.0% · 207ms avg07-24 · uptime 100.0% · 201ms avg07-25 · uptime 100.0% · 202ms avg07-26 · uptime 100.0% · 208ms avg07-27 · uptime 100.0% · 228ms avg07-28 · uptime 100.0% · 224ms avg07-29 · uptime 100.0% · 240ms avg07-30 · uptime 100.0% · 233ms avg07-31 · uptime 100.0% · 221ms avg08-01 · uptime 100.0% · 209ms avg08-02 · uptime 100.0% · 233ms avg08-03 · uptime 100.0% · 260ms avg08-04 · uptime 100.0% · 223ms avg08-05 · uptime 100.0% · 341ms avg08-06 · uptime 100.0% · 247ms avg08-07 · uptime 100.0% · 270ms avg08-08 · uptime 100.0% · 297ms avg08-09 · uptime 100.0% · 315ms avg08-10 · uptime 100.0% · 294ms avg08-11 · uptime 100.0% · 271ms avg08-12 · uptime 100.0% · 272ms avg08-13 · uptime 100.0% · 280ms avg07-1508-13
30d UPTIME 100%
RESPONSE TIME
07-15 · 218ms avg07-15 · 218ms avg07-16 · 234ms avg07-16 · 234ms avg07-17 · 216ms avg07-17 · 216ms avg07-18 · 196ms avg07-18 · 196ms avg07-19 · 184ms avg07-19 · 184ms avg07-20 · 194ms avg07-20 · 194ms avg07-21 · 192ms avg07-21 · 192ms avg07-22 · 206ms avg07-22 · 206ms avg07-23 · 207ms avg07-23 · 207ms avg07-24 · 201ms avg07-24 · 201ms avg07-25 · 202ms avg07-25 · 202ms avg07-26 · 208ms avg07-26 · 208ms avg07-27 · 228ms avg07-27 · 228ms avg07-28 · 224ms avg07-28 · 224ms avg07-29 · 240ms avg07-29 · 240ms avg07-30 · 233ms avg07-30 · 233ms avg07-31 · 221ms avg07-31 · 221ms avg08-01 · 209ms avg08-01 · 209ms avg08-02 · 233ms avg08-02 · 233ms avg08-03 · 260ms avg08-03 · 260ms avg08-04 · 223ms avg08-04 · 223ms avg08-05 · 341ms avg08-05 · 341ms avg08-06 · 247ms avg08-06 · 247ms avg08-07 · 270ms avg08-07 · 270ms avg08-08 · 297ms avg08-08 · 297ms avg08-09 · 315ms avg08-09 · 315ms avg08-10 · 294ms avg08-10 · 294ms avg08-11 · 271ms avg08-11 · 271ms avg08-12 · 272ms avg08-12 · 272ms avg08-13 · 280ms avg08-13 · 280ms avg07-1508-13
AVG RESP 235ms
PRICE (captured 402, USD)
07-14 · $0.00108-13 · $0.001$0.00107-1408-13

Median across 3 endpoints. Use the selector to isolate one.

SUB-SCORES (uptime + x402 compliance)
07-15 uptime: 100.0% compliance: 92% checks07-16 uptime: 100.0% compliance: 92% checks07-17 uptime: 100.0% compliance: 100% checks07-18 uptime: 100.0% compliance: 100% checks07-19 uptime: 100.0% compliance: 100% checks07-20 uptime: 100.0% compliance: 100% checks07-21 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: 100.0% compliance: 100% checks07-26 uptime: 100.0% compliance: 100% checks07-27 uptime: 100.0% compliance: 100% checks07-28 uptime: 100.0% compliance: 100% checks07-29 uptime: 100.0% compliance: 100% checks07-30 uptime: 100.0% compliance: 100% checks07-31 uptime: 100.0% compliance: 100% checks08-01 uptime: 100.0% compliance: 100% checks08-02 uptime: 100.0% compliance: 100% checks08-03 uptime: 100.0% compliance: 100% checks08-04 uptime: 100.0% compliance: 100% checks08-05 uptime: 100.0% compliance: 100% checks08-06 uptime: 100.0% compliance: 100% checks08-07 uptime: 100.0% compliance: 100% checks08-08 uptime: 100.0% compliance: 100% checks08-09 uptime: 100.0% compliance: 100% checks08-10 uptime: 100.0% compliance: 100% checks08-11 uptime: 100.0% compliance: 100% checks08-12 uptime: 100.0% compliance: 100% checks08-13 uptime: 100.0% compliance: 100% checksuptimecompliance07-1508-13

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)
07-15 · $507-16 · $807-17 · $1007-18 · $507-19 · $1507-20 · $607-21 · $1207-22 · $1007-23 · $507-24 · $907-25 · $1707-26 · $807-27 · $1507-28 · $607-29 · $307-30 · $307-31 · $208-01 · $208-02 · $0.3108-03 · $208-04 · $0.5808-05 · $0.5308-06 · $0.8108-07 · $0.3108-08 · $0.3508-09 · $0.3808-10 · $108-11 · $108-12 · $0.3508-13 · $0.35peak $1707-1508-13
DISTINCT BUYERS
07-15 · 36 buyers07-16 · 30 buyers07-17 · 20 buyers07-18 · 35 buyers07-19 · 21 buyers07-20 · 22 buyers07-21 · 22 buyers07-22 · 28 buyers07-23 · 61 buyers07-24 · 36 buyers07-25 · 78 buyers07-26 · 34 buyers07-27 · 31 buyers07-28 · 29 buyers07-29 · 50 buyers07-30 · 56 buyers07-31 · 68 buyers08-01 · 53 buyers08-02 · 21 buyers08-03 · 30 buyers08-04 · 25 buyers08-05 · 20 buyers08-06 · 29 buyers08-07 · 20 buyers08-08 · 24 buyers08-09 · 36 buyers08-10 · 21 buyers08-11 · 34 buyers08-12 · 21 buyers08-13 · 21 buyerspeak 78 buyers07-1508-13

COMPLIANCE

14/14 checks pass · grade A

last 402 captured 2026-08-10 · 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 281ms
● OK 175ms
● OK 112ms
● OK 165ms
● OK 280ms
● OK 209ms
● OK 225ms
● OK 238ms
● OK 203ms
● OK 158ms
● OK 193ms
● OK 269ms
● OK 203ms
● OK 231ms
● SLOW 407ms
● OK 224ms
● OK 327ms
● OK 102ms

EMBED THIS BADGE

Show that Otto AI is monitored on x402-list. Paste this on your site or README, it links back to this live listing.

Otto AI listed on x402-list
status
Otto AI uptime on x402-list
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// HTML · live uptime variant
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RUN THIS SERVICE?

Keep this listing accurate: propose changes to the name, description, website, category or add new endpoints to monitor. Ownership is verified with a domain proof and every change is reviewed manually; measured data stays read-only.

[ update this listing ]

Earn the verified tier: x402list pays a real call to this endpoint and, if it delivers, the service is delivery-verified. The fee covers the cost of the probe, not the badge; there is no refund if the call does not deliver. Agent and API only, no in-browser signing. See /api.

[ verify this service ($0.25) ]

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