> ## Documentation Index > Fetch the complete documentation index at: https://docs.particle.pro/llms.txt > Use this file to discover all available pages before exploring further. # Look up podcasts by external platform identifier > Resolves one or more external platform identifiers (Apple Podcasts collection IDs, Spotify show IDs, YouTube channel IDs, …) — or RSS feed URLs via `platform=rss` — to Particle podcasts. Pass `platform` once and a comma-separated list of identifiers (up to 100 per call). Each result echoes the input identifier alongside the matched podcast; unresolved identifiers omit the `podcast` field entirely so bulk callers can correlate inputs and outputs by key presence without doing a separate join. Use this when you already hold platform-native IDs and want a deterministic mapping; for fuzzy name search use GET /v1/podcasts/search. ## OpenAPI ````yaml /openapi.json get /v1/podcasts/lookup openapi: 3.1.0 info: description: Public API for Particle — news intelligence, financial data, and analysis. title: Particle API version: 0.1.0 x-guidance: >- Podcast, people, company and topic intelligence. Authenticate with a pp_ API key (X-API-Key header) or pay per request with x402: a keyless call to a billable endpoint returns 402 with the payment requirements in the PAYMENT-REQUIRED header; sign the USDC transfer and repeat the request with PAYMENT-SIGNATURE. Start with GET /v1/podcasts/search?q=; the slugs in responses are the inputs to the other endpoints. Docs: https://docs.particle.pro; agent onboarding recipe: https://api.particle.pro/auth.md. servers: - url: https://api.particle.pro security: - ApiKeyHeader: [] - BearerAuth: [] paths: /v1/podcasts/lookup: get: tags: - Podcasts - tier:standard summary: Look up podcasts by external platform identifier description: >- Resolves one or more external platform identifiers (Apple Podcasts collection IDs, Spotify show IDs, YouTube channel IDs, …) — or RSS feed URLs via `platform=rss` — to Particle podcasts. Pass `platform` once and a comma-separated list of identifiers (up to 100 per call). Each result echoes the input identifier alongside the matched podcast; unresolved identifiers omit the `podcast` field entirely so bulk callers can correlate inputs and outputs by key presence without doing a separate join. Use this when you already hold platform-native IDs and want a deterministic mapping; for fuzzy name search use GET /v1/podcasts/search. operationId: lookup-podcasts parameters: - description: >- External platform slug (e.g. 'apple', 'spotify', 'youtube'). Must be one of the slugs reported on /v1/podcasts/{id}/external-links responses, or one of the in-house aliases: 'itunes' (alias for 'apple') and 'rss' (match against the canonical podcast feed URL). explode: false in: query name: platform required: true schema: description: >- External platform slug (e.g. 'apple', 'spotify', 'youtube'). Must be one of the slugs reported on /v1/podcasts/{id}/external-links responses, or one of the in-house aliases: 'itunes' (alias for 'apple') and 'rss' (match against the canonical podcast feed URL). examples: - apple type: string - description: >- One or more platform-native identifiers to resolve. Pass a comma-separated list to look up many at once (max 100 per call). explode: false in: query name: identifier required: true schema: description: >- One or more platform-native identifiers to resolve. Pass a comma-separated list to look up many at once (max 100 per call). examples: - - '1535809341' - '1200361736' items: type: string maxItems: 100 minItems: 1 type: - array - 'null' responses: '200': content: application/json: schema: $ref: '#/components/schemas/PodcastLookup' description: OK '402': content: application/problem+json: schema: $ref: '#/components/schemas/PlatformError' description: >- Payment Required. The request carried no credential; pay $0.01 in USDC per request with x402 (payment requirements in the PAYMENT-REQUIRED header) or send a pp_ API key. See https://docs.particle.pro/x402. default: content: application/problem+json: schema: $ref: '#/components/schemas/PlatformError' description: Error x-codeSamples: - label: cURL lang: curl source: |- curl -H "X-API-Key: $PARTICLE_API_KEY" \ "https://api.particle.pro/v1/podcasts/lookup?platform=apple&identifier=1535809341%2C1200361736" components: schemas: PodcastLookup: additionalProperties: false properties: results: description: One result per unique input identifier, in request order items: $ref: '#/components/schemas/PodcastLookupResult' type: - array - 'null' required: - results type: object PlatformError: additionalProperties: false properties: detail: description: >- A human-readable explanation specific to this occurrence of the problem. examples: - Property foo is required but is missing. type: string error_code: type: string errors: description: Optional list of individual error details items: $ref: '#/components/schemas/ErrorDetail' type: - array - 'null' instance: description: >- A URI reference that identifies the specific occurrence of the problem. examples: - https://example.com/error-log/abc123 format: uri type: string resolve: $ref: '#/components/schemas/ErrorResolve' status: description: HTTP status code examples: - 400 format: int64 type: integer title: description: >- A short, human-readable summary of the problem type. This value should not change between occurrences of the error. examples: - Bad Request type: string type: default: about:blank description: A URI reference to human-readable documentation for the error. examples: - https://example.com/errors/example format: uri type: string type: object PodcastLookupResult: additionalProperties: false properties: identifier: description: The platform-native identifier as supplied in the request type: string podcast: $ref: '#/components/schemas/PodcastCompact' description: >- The matched podcast. Omitted when the identifier does not resolve to any podcast — callers should test for key presence rather than null. required: - identifier type: object ErrorDetail: additionalProperties: false properties: location: description: >- Where the error occurred, e.g. 'body.items[3].tags' or 'path.thing-id' type: string message: description: Error message text type: string value: description: The value at the given location type: object ErrorResolve: additionalProperties: false properties: action: type: string endpoint: type: string message: type: string method: type: string url: type: string required: - message type: object PodcastCompact: additionalProperties: false properties: best_rank: $ref: '#/components/schemas/PodcastRankingHandle' description: >- The single best (lowest-numbered) chart position this podcast currently holds across all charts. Omitted when the podcast holds no current chart appearances, and on endpoints that do not attach it. Reading a full chart (with country/category/source filters and history) remains premium; a single show's own placement is available on every plan. id: description: Podcast ID type: string image_url: description: Cover image URL type: string popularity: description: >- Global popularity percentile in (0,1], a cume_dist ranking over all currently-charting podcasts (Apple Podcasts charts). Higher is more popular. Omitted when the podcast is not currently charting, and on endpoints that build this resource from a projection rather than the full podcast row. format: double type: number publisher: $ref: '#/components/schemas/PodcastPublisherCompact' description: >- Publisher (network) attributed to this podcast. Present only when the embedding endpoint preloads publisher attribution and the podcast's publisher is known. slug: description: Human-readable slug identifier type: string title: description: Podcast title type: string required: - id - title type: object PodcastRankingHandle: additionalProperties: false properties: captured_at: format: date-time type: string category_slug: type: string chart_type: enum: - top_podcasts type: string country: type: string rank: format: int64 type: integer source: enum: - apple - spotify type: string required: - source - chart_type - rank - captured_at type: object PodcastPublisherCompact: additionalProperties: false properties: id: description: Publisher ID type: string name: description: Publisher name type: string slug: description: >- Human-readable slug identifier (e.g., 'goalhanger', 'iheartpodcasts'). When present, accepted in place of the ID anywhere a publisher reference is taken in the API. Occasionally absent on publishers whose name doesn't slugify (e.g., scripts not representable in ASCII URL slugs). type: string required: - id - name type: object securitySchemes: ApiKeyHeader: description: Pass your API key in the X-API-Key header (recommended). in: header name: X-API-Key type: apiKey BearerAuth: description: Pass your API key as a Bearer token in the Authorization header. scheme: bearer type: http ````