# auth.md — elyssah.ai (GreenCore Solutions Corp.)

## Posture

Public content and machine files on this surface are **open by design** — no authentication is required. Discovery endpoints (/.well-known/*) are public.

Transactional agentic commerce is authorized at the **GSC Navigator boundary** using **Microsoft Entra OAuth 2.0** (2-factor; human-in-the-loop on every commit).

## Protected resource

- Resource: https://elyssah.ai
- 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)
- Bearer tokens are presented in the Authorization header.

## Agent registration (self-contained flow)

- **Agent audience:** AI agents and operators integrating with the SPARKS CPG Knowledge Graph (MCP, https://mcp.cpgknowledgegraph.ai/mcp) and the ACM-68000 protocol surfaces.
- **Registration endpoint:** https://elyssah.ai/#contact — this surface's live contact form, reviewed at the GSC Navigator Human-in-the-Loop boundary (POST https://formspree.io/f/meajdorq with fields name, email, message). There is no self-serve dynamic client registration; every registration is human-reviewed.
- **Supported method — verified email:** GSC verifies the operator's email, then provisions credentials after review.
- **Credential use:** GSC issues **Microsoft Entra OAuth 2.0 client credentials** (client_credentials grant against the issuer above); present the access token as a **Bearer token in the Authorization header**. Revocation on request via the same endpoint.

```json
{
  "agent_auth": {
    "skill": "https://elyssah.ai/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/"
  }
}
```

Operator: GreenCore Solutions Corp. · D-U-N-S 24-336-6774 · Microsoft AI Cloud Partner.