> ## 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. # List related episodes > Returns episodes from other shows that cover the same story or subject as this episode, best first: a live nearest-neighbour search over episode content, reranked on shared salient entities, shared topics and a shared news story. Each result carries a calibrated score and a band (strong / moderate / weak); pass include=basis to see the signals behind each match. Use published_within_days for 'who else covered this story this week'; pass same_podcast=true to admit the show's own episodes. Returns an empty page when the episode has no embedded content yet, and 404 when the episode is not found. ## OpenAPI ````yaml /openapi.json get /v1/podcasts/episodes/{id}/related openapi: 3.1.0 info: description: Public API for Particle — news intelligence, financial data, and analysis. title: Particle API version: 0.1.0 servers: - url: https://api.particle.pro security: - ApiKeyHeader: [] - BearerAuth: [] paths: /v1/podcasts/episodes/{id}/related: get: tags: - Podcast Episodes - tier:standard summary: List related episodes description: >- Returns episodes from other shows that cover the same story or subject as this episode, best first: a live nearest-neighbour search over episode content, reranked on shared salient entities, shared topics and a shared news story. Each result carries a calibrated score and a band (strong / moderate / weak); pass include=basis to see the signals behind each match. Use published_within_days for 'who else covered this story this week'; pass same_podcast=true to admit the show's own episodes. Returns an empty page when the episode has no embedded content yet, and 404 when the episode is not found. operationId: list-related-episodes parameters: - description: Results per page explode: false in: query name: limit schema: default: 25 description: Results per page format: int64 maximum: 100 minimum: 1 type: integer - description: Opaque pagination cursor from previous response explode: false in: query name: cursor schema: description: Opaque pagination cursor from previous response type: string - description: Episode slug or ID in: path name: id required: true schema: description: Episode slug or ID type: string - description: >- Admit episodes of the same show. Off by default: a show's own episodes are its episode list (GET /v1/podcasts/{id}/episodes), not its related content. explode: false in: query name: same_podcast schema: description: >- Admit episodes of the same show. Off by default: a show's own episodes are its episode list (GET /v1/podcasts/{id}/episodes), not its related content. type: boolean - description: >- Only episodes published within this many days of the query episode, on either side. Omit (or 0) for no window. Use a short window (7–30) for 'who else covered this story'. explode: false in: query name: published_within_days schema: description: >- Only episodes published within this many days of the query episode, on either side. Omit (or 0) for no window. Use a short window (7–30) for 'who else covered this story'. format: int64 maximum: 3650 minimum: 0 type: integer - description: >- Optional response sections. Pass include=basis to attach, for every result, the signals that make the two episodes related: content similarity, shared entities (with names), shared topics, a shared news story, shared guests, and days apart. explode: false in: query name: include schema: description: >- Optional response sections. Pass include=basis to attach, for every result, the signals that make the two episodes related: content similarity, shared entities (with names), shared topics, a shared news story, shared guests, and days apart. items: enum: - basis type: string type: - array - 'null' responses: '200': content: application/json: schema: $ref: '#/components/schemas/PageRelatedEpisode' description: OK 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/episodes/{id}/related?limit=25" components: schemas: PageRelatedEpisode: additionalProperties: false properties: cursor: description: Pass to next request for more results type: string data: description: List of results items: $ref: '#/components/schemas/RelatedEpisode' type: - array - 'null' has_more: description: Whether more results exist type: boolean required: - data - has_more 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 RelatedEpisode: additionalProperties: false properties: band: description: >- Coarse class of the score: strong (the same story or subject), moderate (overlapping subject), weak (a loose connection). Branch on this rather than on exact score thresholds. enum: - strong - moderate - weak type: string basis: $ref: '#/components/schemas/RelatedEpisodeBasis' description: Why the episodes are related. Present only with include=basis. episode: $ref: '#/components/schemas/EpisodeCompactWithPodcast' description: The related episode with its parent podcast. score: description: >- Fused relatedness in (0,1]; higher is more likely to be judged related. Comparable across episodes. format: double type: number required: - episode - score - band 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 RelatedEpisodeBasis: additionalProperties: false properties: content_similarity: description: >- Cosine similarity of the two episodes' content centroids in [0,1]; omitted when either episode has no embedded content segments. format: double type: number days_apart: description: >- Absolute difference between the two publish dates, in days. Omitted when either episode has no publish date. format: double type: number shared_entities: description: >- Up to three shared entities that contribute most, most significant first. Their ids feed GET /v1/entities/{id} and the mentions tools. items: $ref: '#/components/schemas/RelatedEpisodeEntity' type: - array - 'null' shared_entity_count: description: Number of salient knowledge-graph entities both episodes are about. format: int64 type: integer shared_guest_count: description: Number of guests who appear in both episodes. format: int64 type: integer shared_story_count: description: >- Number of news stories both episodes were linked to. Non-zero means the two episodes discuss the same story. format: int64 type: integer shared_topic_count: description: Number of taxonomy topics both episodes were classified under. format: int64 type: integer required: - shared_entity_count - shared_topic_count - shared_story_count - shared_guest_count type: object EpisodeCompactWithPodcast: additionalProperties: false properties: id: description: Episode ID type: string podcast: $ref: '#/components/schemas/PodcastCompact' description: Parent podcast published_at: description: Publication date format: date-time type: string slug: description: Human-readable slug identifier type: string title: description: Episode title type: string required: - id - title type: object RelatedEpisodeEntity: additionalProperties: false properties: id: description: Knowledge-graph entity id, valid on GET /v1/entities/{id}. type: string name: description: Entity name. type: string required: - id - name 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 ````