> ## Documentation Index > Fetch the complete documentation index at: https://developer.ammdistro.com/llms.txt > Use this file to discover all available pages before exploring further. # Look up UPCs and ISRCs > Whether releases (by UPC) or recordings (by ISRC) are in AMM Distro, and how far along. Needs `ingestion:read`. Up to 50 identifiers; unknown ones come back with `found: false`. ## OpenAPI ````yaml /api-reference/openapi.json get /ingestion/lookup openapi: 3.1.0 info: title: AMM Distro API version: '2026-10-22' description: >- Deliver releases and catalog transfers to AMM Distro from your own systems, check readiness, and follow each release's status. API access is turned on per account by AMM Distro. The account's admins then create keys in **Settings → API**. contact: name: AMM Distro support email: support@ammdistro.com url: https://ammdistro.com servers: - url: https://api.ammdistro.com/api/v2/external description: Production security: - bearerAuth: [] tags: - name: Accounts - name: Releases description: Create, update, validate and submit releases, and read their status. - name: Files description: Upload artwork and audio yourself instead of sending URLs. - name: Catalog transfers description: Move already-released catalog from another distributor. - name: Reference data - name: Ingestion check description: Look up any UPC or ISRC in the account's catalog. paths: /ingestion/lookup: get: tags: - Ingestion check summary: Look up UPCs and ISRCs description: >- Whether releases (by UPC) or recordings (by ISRC) are in AMM Distro, and how far along. Needs `ingestion:read`. Up to 50 identifiers; unknown ones come back with `found: false`. operationId: lookupGet parameters: - name: upc in: query description: Repeat or comma-separate. schema: type: array items: type: string style: form explode: true - name: isrc in: query description: Repeat or comma-separate. schema: type: array items: type: string style: form explode: true responses: '200': description: Results in request order. content: application/json: schema: $ref: '#/components/schemas/LookupResult' '400': description: Bad identifiers. content: application/json: schema: $ref: '#/components/schemas/Error' examples: invalid_request: value: error: invalid_request message: Provide at least one UPC or ISRC. too_many_identifiers: value: error: too_many_identifiers message: At most 50 identifiers per request. invalid_identifier: value: error: invalid_identifier message: One or more identifiers are malformed. '401': description: No key, or a revoked key. content: application/json: schema: $ref: '#/components/schemas/Error' examples: missing_api_key: value: error: missing_api_key message: 'Send your API key as `Authorization: Bearer `.' invalid_api_key: value: error: invalid_api_key message: API key is invalid or has been revoked. '403': description: The key can't do this, or API access is off for its accounts. content: application/json: schema: $ref: '#/components/schemas/Error' examples: insufficient_scope: value: error: insufficient_scope message: This key does not grant delivery:write. api_access_disabled: value: error: api_access_disabled message: >- API access is not turned on for the accounts this key covers. '429': description: >- Rate limit reached. Wait for the time in the `RateLimit-Reset` header. content: application/json: schema: $ref: '#/components/schemas/Error' examples: rate_limited: value: error: rate_limited message: >- Rate limit of 60 requests per minute exceeded for this key. components: schemas: LookupResult: type: object properties: upcs: type: array items: type: object properties: input: type: string upc: type: string found: type: boolean matches: type: array items: type: object properties: matchedOn: type: string enum: - release_upc - alternate_delivery_upc release: $ref: '#/components/schemas/LookupRelease' isrcs: type: array items: type: object properties: input: type: string isrc: type: string found: type: boolean matches: type: array items: type: object properties: matchedOn: type: string enum: - isrc - dolby_isrc - isrc_alias track: type: object properties: id: type: string title: type: string artists: type: array items: type: string isrc: type: string discNumber: type: integer trackNumber: type: integer release: $ref: '#/components/schemas/LookupRelease' summary: type: object properties: requested: type: integer found: type: integer notFound: type: integer checkedAt: type: string format: date-time Error: type: object required: - error - message properties: error: type: string description: Stable code to branch on. example: invalid_payload message: type: string description: What happened, in plain words. details: type: array description: >- Per-field problems (payload errors) or per-release problems (transfer submit). items: oneOf: - $ref: '#/components/schemas/PayloadProblem' - $ref: '#/components/schemas/Issue' - $ref: '#/components/schemas/TransferReleaseProblem' LookupRelease: type: object properties: id: type: string title: type: string artists: type: array items: type: string releaseType: type: string upc: type: - string - 'null' status: type: string enum: - draft - in_review - rejected - approved - delivering - on_hold - delivered - live - takedown_requested - taken_down - unknown ingested: type: boolean description: True once the release is accepted for distribution. releaseDate: type: - string - 'null' format: date createdAt: type: string format: date-time submittedAt: type: - string - 'null' reviewedAt: type: - string - 'null' deliveryQueuedAt: type: - string - 'null' updatedAt: type: string format: date-time PayloadProblem: type: object required: - path - message properties: path: type: string description: Where in your request body the problem is. example: tracks[2].credits[0].roles[1] message: type: string example: '"Wizard" is not a known role (see GET /reference/credit-roles)' Issue: type: object required: - severity - message properties: severity: type: string enum: - error - warning rule: type: string description: Stable rule code, when the problem comes from a release rule. example: credit.production field: type: - string - 'null' example: credits track: type: object description: Which track, when the problem is on one. properties: externalId: type: - string - 'null' discNumber: type: integer trackNumber: type: integer message: type: string TransferReleaseProblem: type: object properties: externalId: type: string errors: type: array items: $ref: '#/components/schemas/Issue' securitySchemes: bearerAuth: type: http scheme: bearer description: An API key from Settings → API in AMM Distro. ```` This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.