generated: '2026-08-26' method: probed source: https://modretro.com/.well-known/ note: >- ModRetro's storefront runs on Shopify. The /.well-known/ documents below are served from modretro.com — the company's own domain — and are shop-specific: the OIDC/OAuth issuer carries ModRetro's Shopify shop id (82920341806), its authorization, token, logout and JWKS endpoints are on orders.modretro.com, and the UCP merchant profile names ModRetro as the Google Pay merchant (merchant_name "ModRetro", merchant_origin "modretro.com"). Platform-delivered, ModRetro-scoped — recorded the same way a templated {site}/wp-json surface is. hit_count: 3 hosts: - host: https://modretro.com documents: - path: /.well-known/openid-configuration status: 200 content_type: application/json file: modretro-openid-configuration.json note: Shopify Customer Accounts OIDC discovery for shop 82920341806. - path: /.well-known/oauth-authorization-server status: 200 content_type: application/json file: modretro-oauth-authorization-server.json note: RFC 8414 authorization-server metadata; identical body to the OIDC document. - path: /.well-known/ucp status: 200 content_type: application/json file: modretro-ucp.json note: >- Universal Commerce Protocol merchant profile (version 2026-04-08). Not an IANA-registered well-known name; published by ucp.dev and advertised in ModRetro's own robots.txt and /agents.md. Declares the MCP transport endpoint, capabilities and payment handlers. - path: /.well-known/security.txt status: 404 - path: /.well-known/api-catalog status: 404 - path: /.well-known/ai-plugin.json status: 404 - path: /.well-known/agent-card.json status: 404 - path: /.well-known/agent.json status: 404 - host: https://support.modretro.com documents: - path: /.well-known/security.txt status: 404 - path: /.well-known/openid-configuration status: 404 - path: /.well-known/oauth-authorization-server status: 404 - path: /.well-known/api-catalog status: 404 - path: /.well-known/agent-card.json status: 404 - path: /.well-known/agent.json status: 404 - host: https://forums.modretro.com documents: - path: /.well-known/security.txt status: 404 - path: /.well-known/agent-card.json status: 404 - path: /.well-known/agent.json status: 404 - path: /.well-known/openid-configuration status: 200 note: >- SOFT 200 — not a document. The forum sits behind a "Checking your browser" interstitial (Stile challenge) that answers 200 with a 2.9KB HTML body for every /.well-known/* path, including /.well-known/api-catalog and /.well-known/oauth-authorization-server. No file saved and no pointer emitted. - path: /.well-known/api-catalog status: 200 note: Same challenge HTML shell as above. Not a document. soft_404_control: host: https://forums.modretro.com probe: /.well-known/openid-configuration bytes: 2941 body: challenge interstitial HTML