← The evidence ledger
Evidence row 76441
Observed , by baseline/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://http--forest-gas-station-mainnet--lcjl27p8lmjs.code.run/mcp/changed
- Recorded
- Previous row
- None: the first of its kind about this subject
- Body SHA-256
- 2738587679ae7a3b015891e13e655761e9615cee1e8be479cdbb7e5488a955bf
- Leaf
- 0x99625b346bf9ba0e3ff12d602d57138fb92a82d66fe07d54a2e9f9780ae8cae8
What was observed
{
"endpoints": [
[
"x402",
"https://http--forest-gas-station-mainnet--lcjl27p8lmjs.code.run/mcp/changed"
]
],
"name": "Forest Agent Tools",
"owner_address": "0xb48d918151311f982d542ef5c84cc1cd54cff7a9",
"raw": {
"accepts": [
{
"amount": "4000",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"maxTimeoutSeconds": 120,
"network": "eip155:8453",
"payTo": "0xb48D918151311F982d542eF5C84cc1cd54CFf7a9",
"scheme": "exact"
}
],
"description": "Auto-detect a public MCP endpoint era, fingerprint its complete normalized tools/list schema contract and optionally compare it with a caller-provided previous SHA-256 hash. Cosmetic descriptions are excluded so text-only edits do not trigger contract drift. Base mainnet USDC",
"extensions": {
"bazaar": {
"info": {
"input": {
"body": {
"previous_hash": "0000000000000000000000000000000000000000000000000000000000000000",
"url": "https://http--forest-gas-station-mainnet--lcjl27p8lmjs.code.run/fixtures/mcp"
},
"bodyType": "json",
"method": "POST",
"type": "http"
},
"output": {
"example": {
"capability": "mcp.changed",
"data": {
"auth_required": false,
"changed": false,
"new_hash": "0000000000000000000000000000000000000000000000000000000000000000",
"previous_hash": "0000000000000000000000000000000000000000000000000000000000000000",
"protocol_era": "modern",
"protocol_version": "example",
"reachable": false,
"schema_valid": false,
"scope": "mcp_tools_schema_contract_change_only",
"tool_count": 0,
"transport": "http-jsonrpc",
"url": "example",
"warnings": []
},
"meta": {
"cache": "miss",
"checked_at": "2026-01-01T00:00:00.000Z",
"duration_ms": 0,
"provider": "mcp-contract"
},
"ok": true,
"version": "1"
},
"type": "json"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"additionalProperties": false,
"properties": {
"previous_hash": {
"description": "Earlier result hash used to detect a material change.",
"pattern": "^[a-fA-F0-9]{64}$",
"type": [
"string",
"null"
]
},
"protocol_version": {
"description": "Public protocol version value used to scope this lookup.",
"maxLength": 32,
"minLength": 1,
"type": "string"
},
"url": {
"description": "Public HTTP(S) URL to inspect, resolve, or compare.",
"maxLength": 2048,
"minLength": 1,
"pattern": "^https?://",
"type": "string"
}
},
"required": [
"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": {
"capability": {
"const": "mcp.changed",
"description": "Public capability value used to scope this lookup."
},
"data": {
"additionalProperties": false,
"description": "Public data value used to scope this lookup.",
"properties": {
"auth_required": {
"description": "Public auth required value used to scope this lookup.",
"type": "boolean"
},
"changed": {
"description": "Public changed value used to scope this lookup.",
"type": [
"boolean",
"null"
]
},
"new_hash": {
"description": "Earlier result hash used to detect a material change.",
"pattern": "^[a-fA-F0-9]{64}$",
"type": [
"string",
"null"
]
},
"previous_hash": {
"description": "Earlier result hash used to detect a material change.",
"pattern": "^[a-fA-F0-9]{64}$",
"type": [
"string",
"null"
]
},
"protocol_era": {
"description": "Public protocol era value used to scope this lookup.",
"enum": [
"modern",
"legacy",
null
],
"type": [
"string",
"null"
]
},
"protocol_version": {
"description": "Public protocol version value used to scope this lookup.",
"type": [
"string",
"null"
]
},
"reachable": {
"description": "Public reachable value used to scope this lookup.",
"type": "boolean"
},
"schema_valid": {
"description": "Public schema valid value used to scope this lookup.",
"type": [
"boolean",
"null"
]
},
"scope": {
"const": "mcp_tools_schema_contract_change_only",
"description": "Public scope value used to scope this lookup."
},
"tool_count": {
"description": "Public tool count value used to scope this lookup.",
"minimum": 0,
"type": [
"integer",
"null"
]
},
"transport": {
"description": "Public transport value used to scope this lookup.",
"enum": [
"http-jsonrpc",
"sse"
]
},
"url": {
"description": "Public HTTP(S) URL to inspect, resolve, or compare.",
"type": "string"
},
"warnings": {
"description": "Public warnings value used to scope this lookup.",
"items": {
"type": "string"
},
"type": "array"
}
},
"required": [
"url",
"changed",
"previous_hash",
"new_hash",
"reachable",
"auth_required",
"protocol_era",
"protocol_version",
"transport",
"tool_count",
"schema_valid",
"warnings",
"scope"
],
"type": "object"
},
"meta": {
"additionalProperties": false,
"description": "Public meta value used to scope this lookup.",
"properties": {
"cache": {
"description": "Public cache value used to scope this lookup.",
"enum": [
"hit",
"miss",
"bypass"
]
},
"checked_at": {
"description": "Public checked at value used to scope this lookup.",
"type": "string"
},
"duration_ms": {
"description": "Public duration ms value used to scope this lookup.",
"minimum": 0,
"type": "integer"
},
"provider": {
"description": "Public provider value used to scope this lookup.",
"type": [
"string",
"null"
]
}
},
"required": [
"provider",
"checked_at",
"cache",
"duration_ms"
],
"type": "object"
},
"ok": {
"const": true,
"description": "Public ok value used to scope this lookup."
},
"version": {
"const": "1",
"description": "Package version whose public metadata should be checked."
}
},
"required": [
"ok",
"capability",
"version",
"data",
"meta"
],
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}
}
},
"lastUpdated": "2026-10-25T19:05:55.523Z",
"quality": {
"l30DaysTotalCalls": 4,
"l30DaysUniquePayers": 2,
"lastCalledAt": "2026-10-25T19:05:55.34Z"
},
"resource": "https://http--forest-gas-station-mainnet--lcjl27p8lmjs.code.run/mcp/changed",
"serviceName": "Forest Agent Tools",
"tags": [
"mcp",
"contract",
"monitoring"
],
"type": "http",
"x402Version": 2
},
"source": "x402_bazaar",
"summary": "Auto-detect a public MCP endpoint era, fingerprint its complete normalized tools/list schema contract and optionally compare it with a caller-provided previous SHA-256 hash. Cosmetic descriptions are excluded so text-only edits do not trigger contract drift. Base mainnet USDC"
}What the leaf hashes
{"body":"2738587679ae7a3b015891e13e655761e9615cee1e8be479cdbb7e5488a955bf","id":76441,"kind":"listing","method":"baseline/1","observed_us":1793025492274691,"prev":null,"subject":"x402_bazaar:https://http--forest-gas-station-mainnet--lcjl27p8lmjs.code.run/mcp/changed","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).
- 0x9962602a33abb14e3aed7bca56ce8ebedfc0b0a7295640c606f751cf33ea2632
- 0x1a8d5cd82c9b50a97e70bf61a63c30ec03829753249c790670160466853efdae
- 0xf8227492b90d639be5329a92c2e1232e8b0915552ab6eba34720d90943cdcb90
- 0xd9957075f79eefb0aa462f8b49c73949cd8ee47f6dc0eb354e19fe8cd3e60132
- 0x086a5647776f6b541b6733fc467bf3cc54b1fdbd92683f83333f37c34b2382f7
- 0x3dcb755dd7a65609ec09b882b9f9e667f1e2d62b5757d6aee98f6bb775f3746f
- 0x2f8883210914425f78c7c73ef3fd0f29f406d0bd2329fd88768f80d214c80d02
- 0xfe8c03735b79e93a8e208574594cc19df168cbc8938d0cc60f74377c76bf50c4
- 0xf8ef2b6c2385981df0d65e525be8511d87776483608ec05b763f85d1296badd6
- 0x2902a29ff231b32ccac2765997f18f1504daedb7f97ee4f0577f4a8edf0e7293
- 0xd3f19437d703373e99e0bf69c4ca06561426260f599f7d259e3257085a387573
- 0x6ae9e6ee1b544d831982666bd3570457659e78fc0064894d7ec23f971a37ff2f
- 0x239fd39716710e7412bd120c373072b4c0d8b11bb9ee431dad62a2ce57b3d6f4
- 0x49062da782c4f73855ddd5fdd51840749f928b5f17d1ce75ac50f2d829104e72
- 0xf0bd63870f0bb378fa300bd33563050dcb7b3e02b44eb3ee550c1c534ec4b246
- 0x1ac20d30773e1f4f2f811540e9a99b5cca9177c9e2e029acc0d80cf3f1d11f0f
- 0xd21942ae3214eff88e08ab04884fd4b11958b51af9a0741b7668e2d07a2c56c9
- 0x9a9024edb5069d88a324facb310a5ce8e495214bbaa968f077bede437390194f
- 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a
- Day root
- 0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8
- Chained
- 0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a
- Published
- On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae