# gsc-registry.ai — GSC Registry (the resolver)

The GSC resolver — the working index of everything GSC operates. Ask it about a GSC AI Agent or surface, get verified facts back: signed records, key-attested against the estate keyring at dpuone.ai. 90 hostnames indexed.

Resolve: https://gsc-registry.ai/resolve?host=<hostname> or https://gsc-registry.ai/resolve/<hostname> — signed facts record (operator, fleet membership, card + kid, key attestation, signal endpoint, jurisdiction, as-of). Unknown host = honest 404 JSON.
Estate index: https://gsc-registry.ai/index.json (paged)
Keyring attestation: https://gsc-registry.ai/keyring.json — the authoritative keyring is https://dpuone.ai/.well-known/jwks.json (the resolver attests the key)
Records signed: gsc-cards-2026-08 (JWS RFC 7515 over RFC 8785 canonical form)
Enforcement posture: open-by-declaration · migration: OAuth 2.1 + PKCE challenge (401 + WWW-Authenticate) on mcp:transact methods per MCP 2025-11-25 · trigger: ecosystem GA of credentialed counterparties · window: Q4 2026 - Q1 2027 · declared 2026-08-24

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