Audit Layer

Understanding the logging, monitoring, and reputation management components of MCP-I

Introduction to the Audit Layer

The Audit Layer in MCP-I ensures that all identity and delegation activities are properly logged, monitored, and made available for oversight and compliance purposes. This layer serves several critical functions:

  1. Accountability: Maintaining records of which agents performed which actions
  2. Transparency: Enabling visibility into delegation chains and agent activities
  3. Compliance: Supporting regulatory requirements for audit trails
  4. Security: Enabling detection of suspicious patterns or misuse
  5. Reputation: Providing data for agent reputation assessments

Audit Integration Points

The Audit Layer integrates with other MCP-I components:

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Audit Record Format

MCP-I audit records follow a standardized format:

{
  "id": "urn:uuid:f81d4fae-7dec-11d0-a765-00a0c91e6bf6",
  "timestamp": "2025-06-15T19:23:24Z",
  "eventType": "VerificationSucceeded",
  "actorType": "Agent",
  "actorId": "did:example:agent456",
  "delegator": "did:example:principal123",
  "resource": "https://api.example.com/data/customer-records",
  "action": "read:customer-records",
  "credentialId": "urn:uuid:3978344f-8596-4c3a-a978-8fcaba3903c5",
  "verifierSystem": "edge-proxy-east-1",
  "requestId": "req-1a2b3c",
  "clientInfo": {
    "ipAddress": "203.0.113.42",
    "userAgent": "MCP-I Agent/1.0"
  },
  "result": {
    "status": "success",
    "statusCode": 200,
    "responseTime": 123
  },
  "proof": {
    "type": "Ed25519Signature2020",
    "created": "2025-06-15T19:23:25Z",
    "verificationMethod": "did:example:logger#key-1",
    "proofValue": "z43BsK5Fu9Sdw..."
  }
}

Error Detection and Response

The Audit Layer can help identify and respond to errors:

  1. Error Patterns: Detecting repeated verification failures
  2. Threshold Alerts: Notifications when errors exceed thresholds
  3. Automated Responses: Taking action based on error patterns
  4. Forensic Analysis: Detailed investigation of security incidents

Key Topics