← The evidence ledger
Evidence row 121049
Observed , by baseline/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://scrooge-x402-tool-mill.vercel.app/v1/watch
- Recorded
- Previous row
- None: the first of its kind about this subject
- Body SHA-256
- 886b3a48a8be9cb5849e6da38e882c2614bcdf0e2073fb599accc681bd272daa
- Leaf
- 0x7b6ff170145248a9a7482e679e67aa14c4629c6088e5d331624f6d398252eb66
What was observed
{
"endpoints": [
[
"x402",
"https://scrooge-x402-tool-mill.vercel.app/v1/watch"
]
],
"name": "scrooge-x402-tool-mill.vercel.app/v1/watch",
"owner_address": "0xfe2353c808f2409ccb81508005a62cef29457706",
"raw": {
"accepts": [
{
"amount": "100000",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"maxTimeoutSeconds": 300,
"network": "eip155:8453",
"payTo": "0xfE2353C808F2409cCb81508005A62cef29457706",
"scheme": "exact"
}
],
"description": "Watch one public page for 7 days. Checks hourly. When the content hash changes, POST {watch_id,url,old_fingerprint,new_fingerprint,changed_at} to your https callback (5s timeout, one retry). POST JSON {\"url\":\"https://example.com\",\"callback_url\":\"https://example.com/hook\"}. Returns {watch_id,url,expires,status_url}. Free status is GET /v1/watch/:id and does not show the callback. At 500 active watches, POST returns 503 before payment. $0.10 USDC on Base (eip155:8453). No API key.",
"extensions": {
"bazaar": {
"info": {
"input": {
"body": {
"callback_url": "https://example.com/hook",
"url": "https://example.com"
},
"bodyType": "json",
"method": "POST",
"type": "http"
},
"output": {
"example": {
"expires": "2026-10-12T00:00:00.000Z",
"status_url": "https://scrooge-x402-tool-mill.vercel.app/v1/watch/0123456789abcdef0123456789abcdef",
"url": "https://example.com/",
"watch_id": "0123456789abcdef0123456789abcdef"
},
"type": "json"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"additionalProperties": false,
"properties": {
"callback_url": {
"description": "Public https URL that receives one POST when the page content hash changes",
"format": "uri",
"type": "string"
},
"url": {
"description": "Public http(s) URL to fetch (SSRF-safe; private/link-local blocked)",
"format": "uri",
"type": "string"
}
},
"required": [
"url",
"callback_url"
],
"type": "object"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
},
"method": {
"enum": [
"POST"
],
"type": "string"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method",
"bodyType",
"body"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"additionalProperties": false,
"properties": {
"expires": {
"description": "When the 7-day watch ends",
"format": "date-time",
"type": "string"
},
"status_url": {
"description": "GET this for status. The callback URL is not included.",
"type": "string"
},
"url": {
"description": "Page being watched",
"type": "string"
},
"watch_id": {
"description": "Id for the free status URL",
"type": "string"
}
},
"required": [
"watch_id",
"url",
"expires",
"status_url"
],
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}
}
},
"lastUpdated": "2026-10-08T06:27:14.817Z",
"quality": {
"l30DaysTotalCalls": 2,
"l30DaysUniquePayers": 2,
"lastCalledAt": "2026-10-08T06:27:14.239Z"
},
"resource": "https://scrooge-x402-tool-mill.vercel.app/v1/watch",
"type": "http",
"x402Version": 2
},
"source": "x402_bazaar",
"summary": "Watch one public page for 7 days. Checks hourly. When the content hash changes, POST {watch_id,url,old_fingerprint,new_fingerprint,changed_at} to your https callback (5s timeout, one retry). POST JSON {\"url\":\"https://example.com\",\"callback_url\":\"https://example.com/hook\"}. Returns {watch_id,url,expires,status_url}. Free status is GET /v1/watch/:id and does not show the callback. At 500 active watches, POST returns 503 before payment. $0.10 USDC on Base (eip155:8453). No API key."
}What the leaf hashes
{"body":"886b3a48a8be9cb5849e6da38e882c2614bcdf0e2073fb599accc681bd272daa","id":121049,"kind":"listing","method":"baseline/1","observed_us":1793025619198869,"prev":null,"subject":"x402_bazaar:https://scrooge-x402-tool-mill.vercel.app/v1/watch","subject_kind":"source_record"}Proof
Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of (296695 rows).
- 0x7b703fed0614423b348513d1e7a2e24042f57f2726eae4152d92a7e657a95090
- 0x17dafeaef8f8e1a274a5c32602d41052286ec76287ace70d2f542a9c3b6d1e62
- 0x7b7eb6dba62b443bce30adf8967add5dd36f9d36fbd80b9477ef689db22cd781
- 0x232192f819cd57545f33b543c1bd58fa34a971c13a57013ad9f2ddf06ddfa52c
- 0x1293fbaca5992a145dcb5fe22d2dbb20993a0cb3e5a59ebfc44e0ed5e6bfe3da
- 0x4e12518c8d28ac21482c8809305c343e1ce8c3f58447e7f0cfe387eec3c672b4
- 0x2ca88fcc2d3a3db802e8cbf944952b19b04d72450d050d9b2ad6eb1804865a12
- 0xfdd7c06a060d74df58821137620114ba96b581c31fe2f2e91fa30fdb587ddeb5
- 0xea27996197dfdf1dffb31590f1a512e6206a8c51ca8f78c38534fe5bf31b37b7
- 0xf2381ca3135154cac94d3453c232f31feb3dabefbf1c73459b1e84459d545370
- 0xe7152aaccc7d7d5da2d13bc6ee8ec470b8c1a5abe7dfed1431f0ed53ec50ebc5
- 0xa6406b1a5540d26e0cbd03bb274a01c10968fadb17913a6043bb9427ddfb71ba
- 0x01c95624b1f2385ef774ee258a9ae58a4df07a1bdaa829de84e1d5201f3f39c2
- 0x7721d38652b6444b18e1193824e50490ade04851ce6221771f6e374c4527d80f
- 0x15039087bf60ae9b06b756ec3cbc299760e59923a438bbd91e34d105186db0ed
- 0x2b6e23e3624a1b66e1d2298cfbce99a93ce6b13d24a58112a71802d79c5f7a76
- 0xd21942ae3214eff88e08ab04884fd4b11958b51af9a0741b7668e2d07a2c56c9
- 0x9a9024edb5069d88a324facb310a5ce8e495214bbaa968f077bede437390194f
- 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a
- Day root
- 0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8
- Chained
- 0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a
- Published
- On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae