← The evidence ledger
Evidence row 121930
Observed , by baseline/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://stall-row-production.up.railway.app/v1/recheck
- Recorded
- Previous row
- None: the first of its kind about this subject
- Body SHA-256
- 66d11c60b3fac705392da7cf66068e19ae53eeb2213ac33825057307529d7ac1
- Leaf
- 0xb1aa1bc188fae61296fc275ba4dcd8fb61aeed8ea2dd44f285ff5fce8bbb25bb
What was observed
{
"endpoints": [
[
"x402",
"https://stall-row-production.up.railway.app/v1/recheck"
]
],
"name": "stall-row",
"owner_address": "0x097f9685d1e0752bf8b02d61e5ce9be7ea0fba7f",
"raw": {
"accepts": [
{
"amount": "5000",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"maxTimeoutSeconds": 300,
"network": "eip155:8453",
"payTo": "0x097f9685D1e0752bF8B02d61E5Ce9be7eA0FBA7F",
"scheme": "exact"
}
],
"description": "Change detection for anything with a URL, built for monitoring loops: probe one x402 resource or web page WITHOUT paying it and answer BASELINE, UNCHANGED, or CHANGED with a field-by-field diff (price, asset, payTo, schema, page body) against the last check for that watch. Use this when an agent runs on a schedule and needs to know what changed before spending money or attention. Watch and pack state persist across redeploys on the service volume. Packs: $1 for 250 checks on one endpoint.",
"extensions": {
"bazaar": {
"info": {
"input": {
"body": {
"url": "https://token-verdict-production.up.railway.app/v1/verdict",
"watch_id": "token-verdict-main"
},
"bodyType": "json",
"method": "POST",
"type": "http"
},
"output": {
"example": {
"changes": [
{
"after": "25000",
"before": "20000",
"field": "amount"
}
],
"checked_at": "2026-10-24T16:00:00Z",
"current": {
"amount": "25000",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"description_hash": "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa",
"network": "eip155:8453",
"payTo": "0x097f9685D1e0752bF8B02d61E5Ce9be7eA0FBA7F",
"schema_hash": "bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb",
"status_code": 402
},
"kind": "x402",
"status": "CHANGED",
"summary": "Changed since the previous check: amount.",
"url": "https://token-verdict-production.up.railway.app/v1/verdict",
"watch_id": "token-verdict-main"
},
"schema": {
"properties": {
"changes": {
"items": {
"properties": {
"after": {
"type": [
"string",
"integer",
"null"
]
},
"before": {
"type": [
"string",
"integer",
"null"
]
},
"field": {
"type": "string"
}
},
"required": [
"field",
"before",
"after"
],
"type": "object"
},
"type": "array"
},
"checked_at": {
"type": "string"
},
"current": {
"type": "object"
},
"kind": {
"enum": [
"x402",
"web"
],
"type": "string"
},
"status": {
"enum": [
"BASELINE",
"UNCHANGED",
"CHANGED"
],
"type": "string"
},
"summary": {
"type": "string"
},
"url": {
"type": "string"
},
"watch_id": {
"type": "string"
}
},
"required": [
"watch_id",
"url",
"kind",
"status",
"changes",
"current",
"checked_at",
"summary"
],
"type": "object"
},
"type": "json"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"properties": {
"pack_id": {
"type": "string"
},
"url": {
"type": "string"
},
"watch_id": {
"type": "string"
}
},
"required": [
"url"
],
"type": "object"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
},
"method": {
"enum": [
"POST",
"PUT",
"PATCH"
],
"type": "string"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method",
"bodyType",
"body"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"changes": {
"items": {
"properties": {
"after": {
"type": [
"string",
"integer",
"null"
]
},
"before": {
"type": [
"string",
"integer",
"null"
]
},
"field": {
"type": "string"
}
},
"required": [
"field",
"before",
"after"
],
"type": "object"
},
"type": "array"
},
"checked_at": {
"type": "string"
},
"current": {
"type": "object"
},
"kind": {
"enum": [
"x402",
"web"
],
"type": "string"
},
"status": {
"enum": [
"BASELINE",
"UNCHANGED",
"CHANGED"
],
"type": "string"
},
"summary": {
"type": "string"
},
"url": {
"type": "string"
},
"watch_id": {
"type": "string"
}
},
"required": [
"watch_id",
"url",
"kind",
"status",
"changes",
"current",
"checked_at",
"summary"
],
"type": "object"
},
"schema": {
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}
}
},
"lastUpdated": "2026-10-25T21:04:10.09Z",
"quality": {
"l30DaysTotalCalls": 7,
"l30DaysUniquePayers": 4,
"lastCalledAt": "2026-10-25T21:04:09.921Z"
},
"resource": "https://stall-row-production.up.railway.app/v1/recheck",
"serviceName": "stall-row",
"tags": [
"monitoring",
"x402",
"change-detection",
"diff",
"agents"
],
"type": "http",
"x402Version": 2
},
"source": "x402_bazaar",
"summary": "Change detection for anything with a URL, built for monitoring loops: probe one x402 resource or web page WITHOUT paying it and answer BASELINE, UNCHANGED, or CHANGED with a field-by-field diff (price, asset, payTo, schema, page body) against the last check for that watch. Use this when an agent runs on a schedule and needs to know what changed before spending money or attention. Watch and pack state persist across redeploys on the service volume. Packs: $1 for 250 checks on one endpoint."
}What the leaf hashes
{"body":"66d11c60b3fac705392da7cf66068e19ae53eeb2213ac33825057307529d7ac1","id":121930,"kind":"listing","method":"baseline/1","observed_us":1793025620681862,"prev":null,"subject":"x402_bazaar:https://stall-row-production.up.railway.app/v1/recheck","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).
- 0xb1aa527b89cc48d922f39e1bba7140bcb4f4ede801f0fad4d3b7c3ef9ceb5474
- 0xef4993c7422377082514ebbd55d3f4ec4e32957d3c55c032eec2dcaa3a766f66
- 0xbc7f84836965a75d26aeeb9056a8dd681643020756426a5af5f7da6713bd4d10
- 0x4d9e8544f61190908b8580c7f64de45f3dfc7dd5e66a36060daa5328d8ea129a
- 0xc588b7f89e5da08d6683300886ba8af667179e0d4d687ee3777cf451154b7c83
- 0x404ae4c8b53cf78df1730d6f4e06b3cf09f293fa1b4c433534fdc21df012973f
- 0x4234d00d938bcdee4b2f6d379a923aaf1472c7a0212cd24391e3a69ab4f5a6bf
- 0xd523e0e141f7bab8247f84ee9e15f23d1c43c72c32b0c34c876dd20ae8d20438
- 0xce7b52aea929e25bddd38b0f456f23a397675312e4cb7db15eb3b5cd4faf39c1
- 0xd5cd216c2216432b3046cca4e23b3c34d41ceff1aa810aa4eea5bd58437939ce
- 0xb673e7e79847b2398685ec91a7c3b2395fccef249a8f8983b5eecc97a794a3ec
- 0xce1aeb889b974291cea1fbfd01595655bd2c1b3636dc5b56eeb8904adb9f6c65
- 0x3b1c0e225d1b1cb24cd5d5ea4af2de20ed68a1eaf8b61924ed1b81e4b9cf7e39
- 0x083427e39db4dd470662401f6db5db8fadf084fc4274cf8621b368416952b78b
- 0x1a74ed3b3756b9cd946da49701bcec120ec88645013da99fa9eea60b39e1a570
- 0x123ec8bee20ddc55223eeef5a4f4d6c4b6416515adbb911c56759f5cde56e452
- 0xd0651cb9bc8155eb52b5247d506e74b8a935057dc190ba52091702ac25ed3a40
- 0x9a9024edb5069d88a324facb310a5ce8e495214bbaa968f077bede437390194f
- 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a
- Day root
- 0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8
- Chained
- 0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a
- Published
- On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae