●

witnessd

AI PAYMENT-READY

payment-ready until 2026-08-20

A neutral witness for the machine-readable web. Pay $0.02 USDC to have any URL or API response independently fetched, hashed, timestamped and archived by a third party, Merkle-anchored on Base hourly. Certified evidence retrieval ($0.05) for agent-commerce disputes. Certificates verify for free — by anyone, without trusting us.

Pay from $0.02 to $1.00 in USDC on Base, settled onchain via the x402 protocol, no signup, no API key needed.

first settlement 2026-08-03 · $0.11 all-time · settled via coinbase

BASE URL https://witnessd.vip │ WEBSITE https://witnessd.vip │ ENDPOINTS 3 │ NETWORK Base │ ASSET USDC │ MEMBER SINCE 2026-08-03 │ MONITORED SINCE 2026-08-03

ASSESSMENT

updated 5h 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: 100%
response p95: 421ms
avg response: 237ms
total checks: 903

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 $0.02 to $1.00 (p58 in AI)

price (min): $0.02
price (max): $1.00
category percentile (min): p58 in AI
category percentile (max): p76 in AI
endpoints / prices: 3 / 3
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 $0.11 30d · 2 buyers

volume 30d: $0.11
buyers 30d: 2
settlements 30d: 4
first settlement: 2026-08-03
last settlement: 2026-08-12
top buyer share: 55% of 30d volume
trend 7d vs 30d: 2.73x the 30d daily rate
networks: eip155:8453
volume all-time: $0.11
settlements all-time: 4
median settlement 30d: $0.02
max settlement 30d: $0.05
settled via: coinbase ($0.11, 4 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.

WHAT IT DOES

ai-derived

Provides a service to witness, timestamp, and archive web content or API responses with cryptographic proof.

category: content-witnessing
in: body
auth: api key

witnessingtimestampingarchivingcryptographic-proofmerkle-tree

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

ENDPOINTS

Service endpoints with HTTP method, path, description, pricing, and network
METHOD	PATH	PRICE	NETWORK	ASSET	402 CHANNEL
POST	/api/credits	$1.00	Base	USDC	header
GET	/api/retrieve/ws_76cae2b76822b099d37882c4	$0.05	Base	USDC	header
POST	/api/witness	$0.02	Base	USDC	header

3 endpoints

REQUEST / RESPONSE EXAMPLE

An unpaid request to GET /api/retrieve/ws_76cae2b76822b099d37882c4 returns HTTP 402 with the payment terms. Settle onchain via your facilitator, then retry with the X-Payment header.

// request

curl -i 'https://witnessd.vip/api/retrieve/ws_76cae2b76822b099d37882c4'

// 402 response (captured by monitor) · 3 payloads · click to expand

[
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0xf058D8A375343DAA6967adF3ac6d425f3c9C8dfc",
        "amount": "1000000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 120
      }
    ],
    "resource": {
      "url": "https://witnessd.vip/api/credits",
      "mimeType": "",
      "description": "Buy a prepaid credit pack (100¢ of witness/retrieve credit) usable via X-Api-Key; required for scheduled watches."
    },
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "body": {},
            "type": "http",
            "method": "POST",
            "bodyType": "json"
          },
          "output": {
            "type": "json",
            "example": {
              "api_key": "wk_…",
              "credits_cents": 100
            }
          }
        },
        "schema": {
          "type": "object",
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "required": [
            "input"
          ],
          "properties": {
            "input": {
              "type": "object",
              "required": [
                "type",
                "method",
                "bodyType",
                "body"
              ],
              "properties": {
                "body": {
                  "type": "object",
                  "properties": {}
                },
                "type": {
                  "type": "string",
                  "const": "http"
                },
                "method": {
                  "enum": [
                    "POST"
                  ],
                  "type": "string"
                },
                "bodyType": {
                  "enum": [
                    "json",
                    "form-data",
                    "text"
                  ],
                  "type": "string"
                }
              },
              "additionalProperties": false
            },
            "output": {
              "type": "object",
              "required": [
                "type"
              ],
              "properties": {
                "type": {
                  "type": "string"
                },
                "example": {
                  "type": "object"
                }
              }
            }
          }
        }
      }
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0xf058D8A375343DAA6967adF3ac6d425f3c9C8dfc",
        "amount": "50000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 120
      }
    ],
    "resource": {
      "url": "https://witnessd.vip/api/retrieve/ws_76cae2b76822b099d37882c4",
      "mimeType": "",
      "description": "Retrieve the archived snapshot (body + certificate + Merkle inclusion proof) for a witnessd snapshot id. Any payer, any snapshot — this is how third parties obtain evidence."
    },
    "x402Version": 2
  },
  {
    "error": "Payment required",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "payTo": "0xf058D8A375343DAA6967adF3ac6d425f3c9C8dfc",
        "amount": "20000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 120
      }
    ],
    "resource": {
      "url": "https://witnessd.vip/api/witness",
      "mimeType": "",
      "description": "Independently fetch, hash, timestamp and archive a URL or API response; returns a signed certificate. Merkle-anchored on Base hourly. Neutral third-party evidence for agent commerce disputes."
    },
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "body": {
              "url": "https://api.coinbase.com/v2/prices/ETH-USD/spot"
            },
            "type": "http",
            "method": "POST",
            "bodyType": "json"
          },
          "output": {
            "type": "json",
            "example": {
              "id": "ws_76cae2b76822b099d37882c4",
              "retrieve_url": "https://witnessd.vip/api/retrieve/ws_76cae2b76822b099d37882c4",
              "certificate_url": "https://witnessd.vip/api/certificate/ws_76cae2b76822b099d37882c4"
            }
          }
        },
        "schema": {
          "type": "object",
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "required": [
            "input"
          ],
          "properties": {
            "input": {
              "type": "object",
              "required": [
                "type",
                "method",
                "bodyType",
                "body"
              ],
              "properties": {
                "body": {
                  "type": "object",
                  "required": [
                    "url"
                  ],
                  "properties": {
                    "url": {
                      "type": "string",
                      "format": "uri",
                      "description": "The http(s) URL or API endpoint to witness right now"
                    }
                  }
                },
                "type": {
                  "type": "string",
                  "const": "http"
                },
                "method": {
                  "enum": [
                    "POST"
                  ],
                  "type": "string"
                },
                "bodyType": {
                  "enum": [
                    "json",
                    "form-data",
                    "text"
                  ],
                  "type": "string"
                }
              },
              "additionalProperties": false
            },
            "output": {
              "type": "object",
              "required": [
                "type"
              ],
              "properties": {
                "type": {
                  "type": "string"
                },
                "example": {
                  "type": "object"
                }
              }
            }
          }
        }
      }
    },
    "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/witnessd/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

30d UPTIME 100%

RESPONSE TIME

AVG RESP 234ms

PRICE (captured 402, USD)

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

SUB-SCORES (uptime + x402 compliance)

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

PILLARS OVER TIME (measured)

price percentile in AI

site signals present (of 6)

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)

DISTINCT BUYERS

COMPLIANCE

14/14 checks pass · grade A

last 402 captured 2026-08-03 · 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

15:22:19 UTC ● OK 20ms

15:06:20 UTC ● OK 132ms

14:50:21 UTC ● OK 98ms

14:34:13 UTC ● OK 73ms

14:18:21 UTC ● OK 57ms

14:02:18 UTC ● OK 33ms

13:46:19 UTC ● OK 68ms

13:30:17 UTC ● OK 69ms

13:14:19 UTC ● OK 59ms

12:58:24 UTC ● OK 83ms

12:42:18 UTC ● OK 56ms

12:26:18 UTC ● OK 83ms

12:10:17 UTC ● OK 7ms

11:54:19 UTC ● OK 70ms

11:38:19 UTC ● OK 77ms

11:22:18 UTC ● OK 207ms

11:06:18 UTC ● OK 34ms

10:50:20 UTC ● OK 173ms

EMBED THIS BADGE

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

status

witnessd uptime on x402-list — live uptime

// HTML

<a href="https://x402-list.com/services/witnessd?utm_source=badge&utm_medium=referral&utm_campaign=embed">
  <img src="https://x402-list.com/badge/witnessd.svg" alt="witnessd listed on x402-list" height="28">
</a>

// Markdown

[![witnessd on x402-list](https://x402-list.com/badge/witnessd.svg)](https://x402-list.com/services/witnessd?utm_source=badge&utm_medium=referral&utm_campaign=embed)

// HTML · live uptime variant

<a href="https://x402-list.com/services/witnessd?utm_source=badge&utm_medium=referral&utm_campaign=embed">
  <img src="https://x402-list.com/badge/witnessd.svg?data=uptime" alt="witnessd uptime on x402-list" height="28">
</a>

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) ]

To request delisting, email info@x402-list.com or update your listing at /services/witnessd/update.