# Blockchain Money Map A2A Agent Card Trust Radar

> Blockchain Money Map A2A Agent Card Trust Radar 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).

Validates and checks trust/compatibility of an A2A agent card against a policy and optional reference, returning a structured trust assessment.

## Facts

- Endpoint: POST https://api.blockchainmoneymap.com/api/x402/x402-a2a-agent-card-trust-radar
- 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-a2a-agent-card-trust-radar-822a846d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_i-rvhPSZC5fzp1nG_NCvI

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-a2a-agent-card-trust-radar-822a846d -d '<json body>'
```

Example prompt: Can you run a trust radar check on this A2A agent card JSON I received from 'marketplace-listing-42' and verify it against my buyer policy to see if it's safe and compatible with text input and JSON output modes?

## When to prefer this

Choose this endpoint when an AI agent needs to perform due diligence on an A2A agent card before establishing a connection or delegating tasks, especially when a buyer policy must be enforced or when comparing against a known-good reference card. Prefer this over generic schema validators when the use case is specifically about agent-to-agent trust, mode compatibility, and policy adherence in blockchain-native agent ecosystems.

## Known failure modes

- Missing required fields (agentCardJson or sourceLabel) returns a validation error
- agentCardJson exceeds maxProperties:50 limit causing rejection
- Malformed JSON in agentCardJson or buyerPolicy
- Policy object conflicts produce indeterminate results
- x402 payment failure or insufficient USDC balance blocks the call
- Reference card mismatch causes comparison to fail if schema is incompatible

## How this service works

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

## Output

A JSON object containing a trust and compatibility assessment of the submitted A2A agent card, including policy compliance results, mode compatibility findings, and any detected anomalies or mismatches relative to a reference card if provided.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "mode": {
   "enum": [
    "check"
   ]
  },
  "facts": {
   "type": "object",
   "required": [
    "agentCardJson",
    "sourceLabel"
   ],
   "properties": {
    "buyerPolicy": {
     "type": "object",
     "maxProperties": 50,
     "additionalProperties": true
    },
    "sourceLabel": {
     "type": "string",
     "maxLength": 500
    },
    "agentCardJson": {
     "type": "object",
     "maxProperties": 50,
     "additionalProperties": true
    },
    "expectedInputModes": {
     "type": "array",
     "maxItems": 10
    },
    "expectedOutputModes": {
     "type": "array",
     "maxItems": 10
    }
   },
   "additionalProperties": false
  },
  "policy": {
   "type": "object",
   "additionalProperties": true
  },
  "reference_facts": {
   "type": "object",
   "required": [
    "agentCardJson",
    "sourceLabel"
   ],
   "properties": {
    "buyerPolicy": {
     "type": "object",
     "maxProperties": 50,
     "additionalProperties": true
    },
    "sourceLabel": {
     "type": "string",
     "maxLength": 500
    },
    "agentCardJson": {
     "type": "object",
     "maxProperties": 50,
     "additionalProperties": true
    },
    "expectedInputModes": {
     "type": "array",
     "maxItems": 10
    },
    "expectedOutputModes": {
     "type": "array",
     "maxItems": 10
    }
   },
   "additionalProperties": false
  }
 }
}
```

## Response schema (JSON Schema)

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

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/blockchain-money-map-a2a-agent-card-trust-radar-822a846d/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)