# Register OAuth client (DCR)

Open endpoint — no authentication required. Desktop/CLI apps call this once to obtain a client_id they persist locally and reuse for all future authorize flows.

Endpoint: POST /public/v1/oauth/register/
Version: 1.0.0

## Request fields (application/json):

  - `client_name` (string, required)
    Human-readable name of the client application.

  - `redirect_uris` (array, required)
    List of allowed redirect URIs. At least one is required. The redirect_uri used in the authorization request must exactly match one of these.

  - `scope` (string)
    Space-separated list of requested scopes. Available value: `all`. Defaults to `all` if omitted.

## Response 201 fields (application/json):

  - `client_id` (string, required)
    Unique identifier for the registered client. Persist this value — it is required for all subsequent authorization requests.

  - `client_name` (string, required)
    Human-readable name of the client application.

  - `redirect_uris` (array, required)
    Registered redirect URIs for this client.

  - `scope` (string, required)
    Space-separated list of scopes granted to this client.

  - `token_endpoint_auth_method` (string, required)
    Authentication method for the token endpoint. Always `none` (public client, PKCE required).

  - `grant_types` (array, required)
    Supported grant types. Always `[authorization_code, refresh_token]`.

  - `response_types` (array, required)
    Supported response types. Always `[code]`.

  - `client_id_issued_at` (integer, required)
    Unix timestamp of when the client_id was issued.

## Response 400:

  - `400` (unknown)
    Invalid client metadata

## Response 400 fields (application/json):

  - `error` (any)
    Human-readable description of what went wrong. Shape varies per endpoint: string on most paths, DRF field-error object on validation paths of creators_api enrich/* and enrichment_batch_api create, list of strings on discovery filter validation. See the per-endpoint example response.
    Example: Insufficient credits.

  - `error_code` (string, required)
    Machine-readable snake_case slug identifying the error class. Stable across API versions; **the only field guaranteed present on every public-API error**. Use for programmatic branching instead of parsing `error`.
    Example: insufficient_credits

  - `message` (string)
    Optional long-form detail sibling to `error`. Present on endpoints that historically returned both a short label and a long explanation (rate limits, polling, batch state, insufficient_credits on resume).
    Example: Poll every 30-60 seconds. Excessive polling results in rate limiting.

  - `retry_after` (integer)
    Seconds the caller should wait before retrying. Present on 429s where the OLD endpoint set it; mirrored in the `Retry-After` HTTP header.
    Example: 60

  - `response_meta` (object)
    Echo of request metadata on a few unwrapped endpoints (notably download_batch_enrichment_csv: batch_id, batch_status). Internal-only on wrapped endpoints; stripped before reaching the client.

  - `available_credits` (number)
    Credits currently available. Present on the 403 insufficient_credits response of `POST /public/v1/enrichment/batch/{id}/resume/`.

  - `required_minimum` (number)
    Minimum credits needed. Pairs with `available_credits`.

  - `current_status` (string)
    Current resource state. Present on 400 responses where the operation requires a different state (e.g. `batch_not_ready`, `batch_not_resumable`).

  - `active_batches` (integer)
    Active batch count when `error_code: batch_limit_reached`.

  - `max_allowed` (integer)
    Per-client batch ceiling. Pairs with `active_batches`.

## Response 401:

  - `401` (unknown)
    Unauthorized — missing or invalid API key.

## Response 401 fields (application/json):

  - `error` (any)
    Human-readable description of what went wrong. Shape varies per endpoint: string on most paths, DRF field-error object on validation paths of creators_api enrich/* and enrichment_batch_api create, list of strings on discovery filter validation. See the per-endpoint example response.
    Example: Insufficient credits.

  - `error_code` (string, required)
    Machine-readable snake_case slug identifying the error class. Stable across API versions; **the only field guaranteed present on every public-API error**. Use for programmatic branching instead of parsing `error`.
    Example: insufficient_credits

  - `message` (string)
    Optional long-form detail sibling to `error`. Present on endpoints that historically returned both a short label and a long explanation (rate limits, polling, batch state, insufficient_credits on resume).
    Example: Poll every 30-60 seconds. Excessive polling results in rate limiting.

  - `retry_after` (integer)
    Seconds the caller should wait before retrying. Present on 429s where the OLD endpoint set it; mirrored in the `Retry-After` HTTP header.
    Example: 60

  - `response_meta` (object)
    Echo of request metadata on a few unwrapped endpoints (notably download_batch_enrichment_csv: batch_id, batch_status). Internal-only on wrapped endpoints; stripped before reaching the client.

  - `available_credits` (number)
    Credits currently available. Present on the 403 insufficient_credits response of `POST /public/v1/enrichment/batch/{id}/resume/`.

  - `required_minimum` (number)
    Minimum credits needed. Pairs with `available_credits`.

  - `current_status` (string)
    Current resource state. Present on 400 responses where the operation requires a different state (e.g. `batch_not_ready`, `batch_not_resumable`).

  - `active_batches` (integer)
    Active batch count when `error_code: batch_limit_reached`.

  - `max_allowed` (integer)
    Per-client batch ceiling. Pairs with `active_batches`.

## Response 403:

  - `403` (unknown)
    Forbidden — caller is not permitted to perform this action.

## Response 403 fields (application/json):

  - `error` (any)
    Human-readable description of what went wrong. Shape varies per endpoint: string on most paths, DRF field-error object on validation paths of creators_api enrich/* and enrichment_batch_api create, list of strings on discovery filter validation. See the per-endpoint example response.
    Example: Insufficient credits.

  - `error_code` (string, required)
    Machine-readable snake_case slug identifying the error class. Stable across API versions; **the only field guaranteed present on every public-API error**. Use for programmatic branching instead of parsing `error`.
    Example: insufficient_credits

  - `message` (string)
    Optional long-form detail sibling to `error`. Present on endpoints that historically returned both a short label and a long explanation (rate limits, polling, batch state, insufficient_credits on resume).
    Example: Poll every 30-60 seconds. Excessive polling results in rate limiting.

  - `retry_after` (integer)
    Seconds the caller should wait before retrying. Present on 429s where the OLD endpoint set it; mirrored in the `Retry-After` HTTP header.
    Example: 60

  - `response_meta` (object)
    Echo of request metadata on a few unwrapped endpoints (notably download_batch_enrichment_csv: batch_id, batch_status). Internal-only on wrapped endpoints; stripped before reaching the client.

  - `available_credits` (number)
    Credits currently available. Present on the 403 insufficient_credits response of `POST /public/v1/enrichment/batch/{id}/resume/`.

  - `required_minimum` (number)
    Minimum credits needed. Pairs with `available_credits`.

  - `current_status` (string)
    Current resource state. Present on 400 responses where the operation requires a different state (e.g. `batch_not_ready`, `batch_not_resumable`).

  - `active_batches` (integer)
    Active batch count when `error_code: batch_limit_reached`.

  - `max_allowed` (integer)
    Per-client batch ceiling. Pairs with `active_batches`.

## Response 422:

  - `422` (unknown)
    Unprocessable entity — validation failed.

## Response 429:

  - `429` (unknown)
    Too Many Requests — rate or capacity limit exceeded. Inspect the `Retry-After` header and the `retry_after` body field for the wait time in seconds.

## Response 429 fields (application/json):

  - `error` (any)
    Human-readable description of what went wrong. Shape varies per endpoint: string on most paths, DRF field-error object on validation paths of creators_api enrich/* and enrichment_batch_api create, list of strings on discovery filter validation. See the per-endpoint example response.
    Example: Insufficient credits.

  - `error_code` (string, required)
    Machine-readable snake_case slug identifying the error class. Stable across API versions; **the only field guaranteed present on every public-API error**. Use for programmatic branching instead of parsing `error`.
    Example: insufficient_credits

  - `message` (string)
    Optional long-form detail sibling to `error`. Present on endpoints that historically returned both a short label and a long explanation (rate limits, polling, batch state, insufficient_credits on resume).
    Example: Poll every 30-60 seconds. Excessive polling results in rate limiting.

  - `retry_after` (integer)
    Seconds the caller should wait before retrying. Present on 429s where the OLD endpoint set it; mirrored in the `Retry-After` HTTP header.
    Example: 60

  - `response_meta` (object)
    Echo of request metadata on a few unwrapped endpoints (notably download_batch_enrichment_csv: batch_id, batch_status). Internal-only on wrapped endpoints; stripped before reaching the client.

  - `available_credits` (number)
    Credits currently available. Present on the 403 insufficient_credits response of `POST /public/v1/enrichment/batch/{id}/resume/`.

  - `required_minimum` (number)
    Minimum credits needed. Pairs with `available_credits`.

  - `current_status` (string)
    Current resource state. Present on 400 responses where the operation requires a different state (e.g. `batch_not_ready`, `batch_not_resumable`).

  - `active_batches` (integer)
    Active batch count when `error_code: batch_limit_reached`.

  - `max_allowed` (integer)
    Per-client batch ceiling. Pairs with `active_batches`.