Open data for Codex

Codex data.
Ready to build with.

Not affiliated with OpenAI. An independent, open mirror and dataset for the OpenAI Codex client.

The official model catalog, verified feature flags, the ModelInfo schema and hook product data for developers building on Codex. Open JSON endpoints, immutable snapshots, and a traceable source for every dataset.

Open model catalog Explore endpoints

Data at a glance

Mirror health: See health endpoint
Last successful check: See metadata
Content fetched: See metadata
Source plan: See metadata
Schema tag: Verified tags
Feature registry tag: Verified tags

Catalog checks and content updates are separate. Schema and feature versions follow verified Codex tags. Health comes from /healthz; missing metadata is not a healthy status.

START BUILDING

Quick start

Fetch the model catalog as JSON. Use its ETag with If-None-Match for subsequent requests.

curl -fsS https://data.cp.dev/v1/codex/models.json

API reference / v1

The catalog is mirrored live from chatgpt.com/backend-api/codex/models and served only at data.cp.dev. Every other dataset is a static file generated from the sources in the repository, so it can be mirrored anywhere.

Endpoint	Description
`/v1/index.json`	Discovery: endpoints, last sync summary, licenses.
`/v1/codex/models.json`	Latest official Codex catalog envelope `{"models":[…]}`, unmodified. `ETag` + `If-None-Match` supported.
`/v1/codex/meta.json`	When it was fetched/checked, client version used, content hash, source plan label.
`/v1/codex/snapshots/index.json`	Recent immutable snapshots; each at `/v1/codex/snapshots/<sha256>.json`.
`/v1/codex/changes.json`	Models added / removed / changed, newest first.
`/v1/schema/codex-model-info/latest.json`	JSON Schema of the Codex client's `ModelInfo` rejection rules; per verified tag at `/<tag>.json`, tag list at `/index.json`. Static file, updated per verified tag.
`/v1/features/codex/latest.json`	Feature-flag registry per verified Codex tag: key, lifecycle stage, default, official rustdoc + /experimental menu copy, legacy aliases (e.g. `telepathy` → `chronicle`), cross-tag history, and community-curated annotations (zh today; translations welcome). Per tag at `/<tag>.json`, tag list at `/index.json`. Static file, updated per verified tag; field reference in `docs/DATASETS.md`.
`/v1/hooks/codex/latest.json`	Hook products, path matching rules, purpose and removal notes. Contribute a product.
`/v1/compat/codex/latest.json`	Compatibility intelligence for the Codex Pass client: which managed `config.toml` keys each Codex release still accepts, plus upgrade advisories. Probed automatically on every release; maintained by the Codex Pass team and not open for contribution.
`/healthz`	200 after a successful catalog check within 24 hours and with no permanent sync failure; 503 otherwise.

Source & freshness

The Codex catalog reflects one dedicated ChatGPT account's view (plan label in meta.json); other plans may see a different list.
It is fetched with the latest published @openai/codex client version. Older clients ignore unknown fields.
If the upstream is unreachable, the last successfully fetched catalog keeps being served.

Licenses