# Blockchain Money Map MCP Operation Stability Ledger

> Blockchain Money Map MCP Operation Stability Ledger is a paid API for AI agents from api.blockchainmoneymap.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-15).

Fingerprints, compares, and verifies MCP API operation definitions by recording and checking hashes of routes, schemas, and payment metadata against a tamper-evident ledger.

## Facts

- Endpoint: POST https://api.blockchainmoneymap.com/api/x402/x402-mcp-operation-stability-ledger
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/blockchain-money-map-mcp-operation-stability-ledger-9ae4e432
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_qxJjTg-YyYOLeZKvrugBK

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability blockchain-money-map-mcp-operation-stability-ledger-9ae4e432 -d '<json body>'
```

Example prompt: Fingerprint the MCP tool 'wallet-screen' at route POST /api/x402/wallet-screen with input schema hash sha256:abc123...def456 and store it in ledger 'my-agent-ledger-001' with standard retention so I have a baseline record of its current definition.

## When to prefer this

Use this endpoint when you need to track schema stability and detect drift in MCP tool definitions over time — especially in agent fleets where API contracts must remain consistent. It is the right choice when you want tamper-evident, ledger-backed fingerprinting of API operation facts (route, schema hashes, payment metadata) rather than simple in-memory version checks. Prefer this over generic versioning systems when you need an auditable, paid notarization record with retention policies.

## Known failure modes

- Invalid mode enum value returns 400 with validation error
- Malformed SHA-256 hash pattern causes schema rejection
- ledger_id or record_id not found returns 404
- lookup_secret mismatch returns 403 forbidden
- Duplicate idempotency_key with conflicting payload returns conflict error
- Missing required facts fields for the chosen mode causes partial processing error
- Payment not received (x402) results in 402 Payment Required response

## How this service works

Choose Blockchain Money Map for human-readable public blockchain reports or x402-paid agent API services.

## Output

Returns a JSON object containing the ledger operation outcome: for 'fingerprint' mode, the stored record ID and hash confirmation; for 'compare' mode, a diff report showing which facts changed between current and reference; for 'verify' mode, a pass/fail stability status with details on any mismatched fields.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "mode": {
   "enum": [
    "fingerprint",
    "compare",
    "verify"
   ]
  },
  "facts": {
   "type": "object",
   "required": [],
   "properties": {
    "method": {
     "type": "string",
     "maxLength": 500
    },
    "route_path": {
     "type": "string",
     "maxLength": 500
    },
    "operation_id": {
     "type": "string",
     "maxLength": 500
    },
    "mcp_tool_name": {
     "type": "string",
     "maxLength": 500
    },
    "resource_hash": {
     "type": "string",
     "pattern": "^sha256:[a-fA-F0-9]{64}$"
    },
    "version_label": {
     "type": "string",
     "maxLength": 500
    },
    "input_schema_hash": {
     "type": "string",
     "pattern": "^sha256:[a-fA-F0-9]{64}$"
    },
    "output_schema_hash": {
     "type": "string",
     "pattern": "^sha256:[a-fA-F0-9]{64}$"
    },
    "payment_metadata_hash": {
     "type": "string",
     "pattern": "^sha256:[a-fA-F0-9]{64}$"
    }
   },
   "additionalProperties": false
  },
  "policy": {
   "type": "object",
   "additionalProperties": true
  },
  "ledger_id": {
   "type": "string",
   "pattern": "^[A-Za-z0-9_-]{12,160}$",
   "maxLength": 160,
   "minLength": 12
  },
  "notary_id": {
   "type": "string",
   "pattern": "^[A-Za-z0-9_-]{12,160}$",
   "maxLength": 160,
   "minLength": 12
  },
  "record_id": {
   "type": "string",
   "pattern": "^[A-Za-z0-9_-]{12,160}$",
   "maxLength": 160,
   "minLength": 12
  },
  "lookup_secret": {
   "type": "string",
   "pattern": "^[A-Za-z0-9_-]{43,160}$",
   "maxLength": 160,
   "minLength": 43
  },
  "idempotency_key": {
   "type": "string",
   "pattern": "^[A-Za-z0-9_-]{32,160}$",
   "maxLength": 160,
   "minLength": 32
  },
  "reference_facts": {
   "type": "object",
   "required": [],
   "properties": {
    "method": {
     "type": "string",
     "maxLength": 500
    },
    "route_path": {
     "type": "string",
     "maxLength": 500
    },
    "operation_id": {
     "type": "string",
     "maxLength": 500
    },
    "mcp_tool_name": {
     "type": "string",
     "maxLength": 500
    },
    "resource_hash": {
     "type": "string",
     "pattern": "^sha256:[a-fA-F0-9]{64}$"
    },
    "version_label": {
     "type": "string",
     "maxLength": 500
    },
    "input_schema_hash": {
     "type": "string",
     "pattern": "^sha256:[a-fA-F0-9]{64}$"
    },
    "output_schema_hash": {
     "type": "string",
     "pattern": "^sha256:[a-fA-F0-9]{64}$"
    },
    "payment_metadata_hash": {
     "type": "string",
 
… (truncated)
```

## Response schema (JSON Schema)

```json
{
 "type": "json"
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/blockchain-money-map-mcp-operation-stability-ledger-9ae4e432/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.blockchainmoneymap.com](https://www.zero.xyz/host/api.blockchainmoneymap.com/llms.txt)