# Registry Stack identifier resolver

Canonical host: https://id.registrystack.org/

This host resolves stable Registry Stack identifiers for problem types, JSON-LD namespaces and vocabularies, JSON Schemas, JSON-LD contexts, and response profiles.

Authority boundary: This site publishes the current Registry Stack identifiers from a digest-bound source catalog. Product source and the actual service response remain authoritative for runtime behavior.

For RFC 9457 problem responses, use the stable code extension and the response status/detail fields. Do not parse URL paths for program logic.

Machine catalogs:

- https://id.registrystack.org/index.json
- https://id.registrystack.org/problems/index.json
- https://id.registrystack.org/schemas/index.json
- https://id.registrystack.org/namespaces/index.json
- https://id.registrystack.org/contexts/index.json
- https://id.registrystack.org/profiles/index.json
- https://id.registrystack.org/vocabularies/index.json

Public documentation:

- https://docs.registrystack.org/
- https://docs.registrystack.org/reference/errors/
- https://docs.registrystack.org/llms.txt
- https://docs.registrystack.org/llms-full.txt