← The evidence ledger
Evidence row 76442
Observed , by baseline/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://http--forest-gas-station-mainnet--lcjl27p8lmjs.code.run/mcp/contract-check
- Recorded
- Previous row
- None: the first of its kind about this subject
- Body SHA-256
- 4be5a9567f35f6597bccf487ee75e6c5310042ab7333d42d575eb7c812bf7698
- Leaf
- 0x740e0888503e2301767e978f06caa9a994ab3127403dec159263b82644006d76
What was observed
{
"endpoints": [
[
"x402",
"https://http--forest-gas-station-mainnet--lcjl27p8lmjs.code.run/mcp/contract-check"
]
],
"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": "Inspect one public MCP HTTP endpoint, auto-detect the stateless 2026-07-28 era or fall back to the legacy initialize lifecycle, then normalize tools/list schemas into a deterministic SHA-256 contract fingerprint. Forest never invokes an advertised tool or attempts authentication. Base mainnet USDC",
"extensions": {
"bazaar": {
"info": {
"input": {
"body": {
"url": "https://http--forest-gas-station-mainnet--lcjl27p8lmjs.code.run/fixtures/mcp"
},
"bodyType": "json",
"method": "POST",
"type": "http"
},
"output": {
"example": {
"capability": "mcp.contract-check",
"data": {
"auth_required": false,
"capabilities": [],
"invalid_tool_count": 0,
"latency_ms": 0,
"protocol_era": "modern",
"protocol_version": "example",
"reachable": false,
"schema_valid": false,
"scope": "mcp_protocol_discovery_and_tools_schema_contract_only",
"tool_count": 0,
"tools": [],
"tools_hash": "0000000000000000000000000000000000000000000000000000000000000000",
"transport": "http-jsonrpc",
"truncated": false,
"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": {
"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.contract-check",
"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"
},
"capabilities": {
"description": "Public capabilities value used to scope this lookup.",
"items": {
"type": "string"
},
"type": "array"
},
"invalid_tool_count": {
"description": "Public invalid tool count value used to scope this lookup.",
"minimum": 0,
"type": "integer"
},
"latency_ms": {
"description": "Public latency ms value used to scope this lookup.",
"minimum": 0,
"type": "integer"
},
"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_protocol_discovery_and_tools_schema_contract_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"
]
},
"tools": {
"description": "Public tools value used to scope this lookup.",
"items": {
"additionalProperties": false,
"properties": {
"input_schema_hash": {
"description": "Public tools hash value used to scope this lookup.",
"pattern": "^[a-fA-F0-9]{64}$",
"type": [
"string",
"null"
]
},
"name": {
"description": "Public DNS hostname to resolve.",
"type": [
"string",
"null"
]
},
"output_schema_hash": {
"description": "Public tools hash value used to scope this lookup.",
"pattern": "^[a-fA-F0-9]{64}$",
"type": [
"string",
"null"
]
}
},
"required": [
"name",
"input_schema_hash",
"output_schema_hash"
],
"type": "object"
},
"maxItems": 200,
"type": "array"
},
"tools_hash": {
"description": "Public tools hash value used to scope this lookup.",
"pattern": "^[a-fA-F0-9]{64}$",
"type": [
"string",
"null"
]
},
"transport": {
"description": "Public transport value used to scope this lookup.",
"enum": [
"http-jsonrpc",
"sse"
]
},
"truncated": {
"description": "Public truncated value used to scope this lookup.",
"type": "boolean"
},
"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",
"reachable",
"protocol_era",
"protocol_version",
"transport",
"auth_required",
"capabilities",
"tool_count",
"tools_hash",
"schema_valid",
"invalid_tool_count",
"tools",
"truncated",
"warnings",
"latency_ms",
"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": "2026-10-25T19:05:58.711Z",
"quality": {
"l30DaysTotalCalls": 4,
"l30DaysUniquePayers": 2,
"lastCalledAt": "2026-10-25T19:05:58.524Z"
},
"resource": "https://http--forest-gas-station-mainnet--lcjl27p8lmjs.code.run/mcp/contract-check",
"serviceName": "Forest Agent Tools",
"tags": [
"mcp",
"contract",
"tools",
"agent",
"check"
],
"type": "http",
"x402Version": 2
},
"source": "x402_bazaar",
"summary": "Inspect one public MCP HTTP endpoint, auto-detect the stateless 2026-07-28 era or fall back to the legacy initialize lifecycle, then normalize tools/list schemas into a deterministic SHA-256 contract fingerprint. Forest never invokes an advertised tool or attempts authentication. Base mainnet USDC"
}What the leaf hashes
{"body":"4be5a9567f35f6597bccf487ee75e6c5310042ab7333d42d575eb7c812bf7698","id":76442,"kind":"listing","method":"baseline/1","observed_us":1793025492276077,"prev":null,"subject":"x402_bazaar:https://http--forest-gas-station-mainnet--lcjl27p8lmjs.code.run/mcp/contract-check","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).
- 0x740dc30d066957eba3e043eda855269d8d27a767f1e1fb94f3131bf87b266838
- 0xd0c49254a577f6e238c57d0fde3c06771d043e0016f6932a0a3347ac4f75a237
- 0x5fa56f173ec23c044de0d32f1e4ab17dbfc8cd2be21df81165ca2630d0114636
- 0x18e61ab6eb4e40a2985f2311fe56cde6a17fcf93ba2c1221e58783f31040442c
- 0xb1f85f14b5e8fffb6f0fa2109b88e6a5c9ef22dd7360fe946a2f67f45c6d5bda
- 0x4c7a275e5e657b09de13bbff29ec42e3d0383e697e5029462e28f845335ad8d3
- 0xe3792670120d0575ee33bc38369fbe9dea0adea76079820fa3736fd4a8530d07
- 0x68ee69a09183eaaef73a98a2ae30724a36c3223f83451d8086369e8483bcdeb0
- 0x5e4bebbaa53792392b5802563be0d83eabf1737db429041ee64a520576a37254
- 0xe7a9c6724a437c9a1fa4cdc48c7f0de9a8d253a4be67ec315658101040ef40d6
- 0x9adfaac1e332051e6999b9b702c6d539c2d639f94fd57735f2ddd441a4b5230c
- 0x3f193b47c78cf4e7b9e4988cd716854b0e1011e5fcbca161f5a885f1aa02857d
- 0x06064dc1eb2363bec8c2a752e0a28aafc4bf0cb21d1b1b755821c1575bb77a96
- 0xc4fe2177880ea1b0e82b6fe4c270090fd0fbe5af3a42a8cbf6a6ba2fa35625f6
- 0x15039087bf60ae9b06b756ec3cbc299760e59923a438bbd91e34d105186db0ed
- 0x2b6e23e3624a1b66e1d2298cfbce99a93ce6b13d24a58112a71802d79c5f7a76
- 0xd21942ae3214eff88e08ab04884fd4b11958b51af9a0741b7668e2d07a2c56c9
- 0x9a9024edb5069d88a324facb310a5ce8e495214bbaa968f077bede437390194f
- 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a
- Day root
- 0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8
- Chained
- 0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a
- Published
- On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae