> ## Documentation Index
> Fetch the complete documentation index at: https://cortex-foundation-add13747-droid-1a2462c9-cor-444-sanitize.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Problem catalog

> Dereferenceable type URIs for RFC 9457 documents from api.cortex.foundation.

`PROBLEM_TYPE_BASE` is `https://docs.cortex.foundation/problems`. Each
`ErrorCode` on the wire has a page at `/problems/{code}` whose path is the
snake\_case `code` (not kebab-case).

These pages are the `type` member of a problem document. They are generated
from `crates/cortex-core/src/error.rs` and must stay in lockstep — CI fails
if a code is missing.

| Code                                                               | HTTP | Retryable |
| ------------------------------------------------------------------ | ---- | --------- |
| [`validation_failed`](/problems/validation_failed)                 | 422  | no        |
| [`bad_request`](/problems/bad_request)                             | 400  | no        |
| [`idempotency_key_reuse`](/problems/idempotency_key_reuse)         | 400  | no        |
| [`payload_too_large`](/problems/payload_too_large)                 | 413  | no        |
| [`unsupported_media_type`](/problems/unsupported_media_type)       | 415  | no        |
| [`unauthenticated`](/problems/unauthenticated)                     | 401  | no        |
| [`invalid_credential`](/problems/invalid_credential)               | 401  | no        |
| [`forbidden`](/problems/forbidden)                                 | 403  | no        |
| [`entitlement_required`](/problems/entitlement_required)           | 403  | no        |
| [`not_found`](/problems/not_found)                                 | 404  | no        |
| [`conflict`](/problems/conflict)                                   | 409  | yes       |
| [`gone`](/problems/gone)                                           | 410  | no        |
| [`invalid_state`](/problems/invalid_state)                         | 422  | no        |
| [`quota_exceeded`](/problems/quota_exceeded)                       | 429  | no        |
| [`rate_limited`](/problems/rate_limited)                           | 429  | yes       |
| [`concurrency_limit_reached`](/problems/concurrency_limit_reached) | 429  | no        |
| [`safety_intervention`](/problems/safety_intervention)             | 403  | no        |
| [`content_policy`](/problems/content_policy)                       | 403  | no        |
| [`jurisdiction_restricted`](/problems/jurisdiction_restricted)     | 403  | no        |
| [`internal`](/problems/internal)                                   | 500  | yes       |
| [`upstream_failure`](/problems/upstream_failure)                   | 502  | yes       |
| [`upstream_timeout`](/problems/upstream_timeout)                   | 504  | yes       |
| [`service_unavailable`](/problems/service_unavailable)             | 503  | yes       |
| [`no_capacity`](/problems/no_capacity)                             | 503  | yes       |