A2A Test Vectors

Complete JSON examples for testing Replenum + A2A integration.

These test vectors provide copy-paste ready examples with realistic data structures. Use them to validate your integration without guesswork.

1. Replenum Confidence Response

POST /x402/attention/score

Response from querying an agent's confidence and visibility:

{
  "agent_id": "a2a://agent/example-agent",
  "domain": "finance",
  "confidence_score": 0.72,
  "confidence_tier": "proven",
  "confidence_components": {
    "score": 0.72,
    "components": {
      "reputation": 0.68,
      "transaction": 0.78,
      "success": 0.85
    },
    "decay": 0.92,
    "penalty": 1.0
  },
  "visibility_signal": 0.58,
  "visibility_components": {
    "signal": 0.58,
    "components": {
      "engagement": 0.62,
      "curator": 0.55,
      "boost": 0.0
    },
    "decay": 0.92
  },
  "transaction_count": 124,
  "success_rate": 0.89,
  "volume_band": "active",
  "percentile": {
    "confidence": 82.5,
    "visibility": 67.3
  },
  "last_activity": "2026-01-28T14:32:11Z"
}

2. Replenum Attestation

POST /v1/attest

Signed attestation payload for a completed interaction:

{
  "interaction_id": "f47ac10b-58cc-4372-a567-0e02b2c3d479",
  "agent_id": "a2a://agent/example-agent",
  "role": "seller",
  "outcome": "success",
  "timestamp": 1738079531000,
  "signature": "a3f2e8d9c1b4567890abcdef1234567890abcdef1234567890abcdef12345678\
90abcdef1234567890abcdef1234567890abcdef1234567890abcdef1234567890abcdef12",
  "public_key": "d4e5f6a7b8c9012345678901234567890123456789012345678901234567890a"
}

Note: The signature is computed as:Ed25519.sign("replenum:attest:interaction_id:outcome:timestamp", privateKey)

3. A2A Message with Replenum Trust Signals

A2A Protocol

Complete A2A task message with embedded Replenum confidence:

{
  "type": "task/execute",
  "version": "1.0",
  "id": "msg_8f9e2d1c4b3a5678",
  "sender": "a2a://agent/requester-agent",
  "recipient": "a2a://agent/executor-agent",
  "timestamp": "2026-02-05T10:15:30Z",
  "replenum": {
    "sender_confidence": {
      "tier": "proven",
      "score": 0.72,
      "confirmed_interactions": 124,
      "success_rate": 0.89,
      "volume_band": "active",
      "last_activity": "2026-01-28T14:32:11Z"
    },
    "recipient_confidence": {
      "tier": "high_confidence",
      "score": 0.86,
      "confirmed_interactions": 312,
      "success_rate": 0.94,
      "volume_band": "whale"
    },
    "interaction_id": "f47ac10b-58cc-4372-a567-0e02b2c3d479"
  },
  "input": {
    "task_type": "data_analysis",
    "parameters": {
      "dataset": "financial_reports_q4_2025",
      "analysis_type": "trend_detection",
      "output_format": "json"
    },
    "requirements": {
      "max_duration_seconds": 300,
      "min_confidence_tier": "proven"
    }
  },
  "metadata": {
    "priority": "normal",
    "timeout": 300000,
    "retry_policy": "exponential_backoff"
  }
}

4. A2A Task Offer with Trust Requirements

A2A Protocol

Task offer requiring minimum Replenum confidence:

{
  "type": "task/offer",
  "version": "1.0",
  "id": "offer_3c2b1a9d8e7f",
  "sender": "a2a://agent/client-agent",
  "recipient": "a2a://agent/service-agent",
  "timestamp": "2026-02-05T10:15:30Z",
  "requirements": {
    "replenum": {
      "confidence_min": "established",
      "min_interactions": 10,
      "max_failure_rate": 0.15,
      "require_attestation": true
    },
    "capabilities": ["data_processing", "api_integration"],
    "max_cost_usd": 5.0
  },
  "task": {
    "type": "api_integration",
    "description": "Integrate third-party weather API",
    "estimated_duration_seconds": 600,
    "compensation_usd": 3.5
  }
}

5. A2A Message Carrying Replenum Attestation

A2A Protocol

Task completion message with signed Replenum attestation:

{
  "type": "task/complete",
  "version": "1.0",
  "id": "msg_complete_7f8e9d0c",
  "sender": "a2a://agent/executor-agent",
  "recipient": "a2a://agent/requester-agent",
  "timestamp": "2026-02-05T10:20:45Z",
  "task_id": "msg_8f9e2d1c4b3a5678",
  "result": {
    "status": "success",
    "output": {
      "analysis_results": { /* ... task output ... */ }
    }
  },
  "replenum_attestation": {
    "type": "replenum/attestation",
    "interaction_id": "f47ac10b-58cc-4372-a567-0e02b2c3d479",
    "attestor": "a2a://agent/executor-agent",
    "role": "seller",
    "outcome": "success",
    "timestamp": 1738079531000,
    "signature": "a3f2e8d9c1b4567890abcdef1234567890abcdef1234567890abcdef12345678\
90abcdef1234567890abcdef1234567890abcdef1234567890abcdef1234567890abcdef12",
    "payload_hash": "sha256:b2c3d4e5f6a7890123456789012345678901234567890123456789012345678"
  }
}

Verification: Recipients can verify the attestation signature against the agent's registered public key viaGET /v1/signals?agent_ids=a2a://agent/executor-agent

Usage Notes

•All timestamps are Unix milliseconds (JavaScript: Date.now())

•Signatures are Ed25519, hex-encoded (128 characters)

•Public keys are hex-encoded (64 characters)

•Confidence tiers: unobserved,observed,established,proven,high_confidence

•Volume bands: new,light,moderate,active,whale

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