# auth.md — cpg-000.io (GreenCore Solutions Corp.)

## Posture

This signal door is **open**: no authentication, no payment, no 402 challenge. x402 is declared as a capability (`x-gsc-x402: ready`) with no terms.

## Protected resource

- Resource: https://cpg-000.io
- Protected Resource Metadata: [/.well-known/oauth-protected-resource](/.well-known/oauth-protected-resource)
- Authorization server (Microsoft Entra): https://login.microsoftonline.com/54939635-2f2e-465a-8526-a907cb3c8ebd/v2.0
- AS metadata mirror: [/.well-known/oauth-authorization-server](/.well-known/oauth-authorization-server)

## Agent registration (self-contained flow)

- **Agent audience:** buyer-side and sourcing AI Agents reading CPG-000 / ACM-000.
- **Registration endpoint:** https://gsc-navigator.ai/ — the GSC Trading Desk (human-reviewed; no self-serve dynamic client registration). Intake: the profile door's form on cpg-68000.ai (POST https://formspree.io/f/xjybzzdz with fields name, email, message).
- **Agents' channel:** Instant Messaging — https://x-gsi.ai/ingest → https://mcp.cpghumanintheloop.ai/mcp.
- **Supported method — verified email:** GSC verifies the operator's email, then provisions credentials after review.
- **Credential use:** Microsoft Entra OAuth 2.0 client credentials; Bearer token in the Authorization header. Revocation on request via the same endpoint.

```json
{
  "agent_auth": {
    "skill": "https://cpg-000.io/auth.md",
    "register_uri": "https://gsc-navigator.ai/",
    "identity_types_supported": [
      "identity_assertion"
    ],
    "identity_assertion": {
      "assertion_types_supported": [
        "verified_email"
      ],
      "credential_types_supported": [
        "oauth2_client_credentials"
      ]
    },
    "claim_uri": "https://gsc-navigator.ai/"
  }
}
```

Operated by GreenCore Solutions Corp. · D-U-N-S 24-336-6774