> ## 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. # Get chart slot history > Returns historical chart snapshots for a chart slot, ordered most-recent first. Set `since` / `until` to bound the time range; set `podcast_id` to filter to one podcast within the slot. ## OpenAPI ````yaml /openapi.json get /v1/podcasts/rankings/history 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/rankings/history: get: tags: - Podcast Rankings - tier:premium summary: Get chart slot history description: >- Returns historical chart snapshots for a chart slot, ordered most-recent first. Set `since` / `until` to bound the time range; set `podcast_id` to filter to one podcast within the slot. operationId: get-podcast-rankings-history 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: Ranking source platform. explode: false in: query name: source schema: default: apple description: Ranking source platform. enum: - apple - spotify type: string - description: Chart variant within the source. explode: false in: query name: chart_type schema: default: top_podcasts description: Chart variant within the source. enum: - top_podcasts type: string - description: ISO 3166-1 alpha-2 country code; case-insensitive on input. explode: false in: query name: country schema: default: us description: ISO 3166-1 alpha-2 country code; case-insensitive on input. maxLength: 2 minLength: 2 type: string - description: Category slug. Omit for the overall chart. explode: false in: query name: category_slug schema: description: Category slug. Omit for the overall chart. type: string - description: Restrict to one podcast across the chart slot's history. explode: false in: query name: podcast_id schema: description: Restrict to one podcast across the chart slot's history. type: string - description: Lower bound on captured_at (ISO 8601). Omit for no lower bound. explode: false in: query name: since schema: description: Lower bound on captured_at (ISO 8601). Omit for no lower bound. examples: - '2025-01-01T00:00:00Z' type: string - description: Upper bound on captured_at (ISO 8601). Omit for no upper bound. explode: false in: query name: until schema: description: Upper bound on captured_at (ISO 8601). Omit for no upper bound. examples: - '2026-01-01T00:00:00Z' type: string responses: '200': content: application/json: schema: $ref: '#/components/schemas/PagePodcastRanking' 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/rankings/history?limit=25&source=apple&chart_type=top_podcasts&country=us" components: schemas: PagePodcastRanking: additionalProperties: false properties: cursor: description: Pass to next request for more results type: string data: description: List of results items: $ref: '#/components/schemas/PodcastRanking' 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 PodcastRanking: additionalProperties: false properties: captured_at: description: When the snapshot containing this row was captured (UTC). format: date-time type: string category: $ref: '#/components/schemas/Category' description: >- Category the chart belongs to. Null on the overall ('top podcasts') chart. channel_subscriber_count: description: YouTube channel subscriber count when the source is YouTube. format: int64 type: integer chart_total: description: >- Total number of entries in this chart at this capture (typically 200). format: int64 type: integer chart_type: description: >- Chart variant within the source. Currently only 'top_podcasts' is emitted. enum: - top_podcasts type: string country: description: Lowercase ISO 3166-1 alpha-2 country code. type: string external_id: description: >- Source-native identifier for the chart entry (e.g., the Apple collection id '1581410252'). Stable across captures even when the linked podcast hasn't been resolved yet. type: string external_url: description: Canonical URL of the show on the source platform. type: string growth_indicator: description: >- Source-supplied trend hint (e.g. 'up' or 'down') when the source provides one. type: string id: description: >- Stable identifier for this chart entry capture (one row per snapshot per slot per rank). type: string is_current: description: Whether this row belongs to the live snapshot. type: boolean podcast: $ref: '#/components/schemas/PodcastCompact' description: >- Linked podcast in our catalog. Absent when the source's chart entry hasn't been matched to a podcast yet (roughly two thirds of international and long-tail rows). previous_rank: description: >- Source-reported rank from the previous capture, when the source provides it. Apple does not currently populate this; treat its absence as 'unknown', not 'unchanged'. format: int64 type: integer rank: description: Position on the chart (1-based, lower is better). format: int64 type: integer reach_pct: description: Source-supplied audience reach percentage (reach-survey sources). format: double type: number show: $ref: '#/components/schemas/ShowSummary' description: >- Show metadata captured with the chart entry. Always populated, including for chart entries we haven't matched to a podcast in our catalog. source: description: Ranking source platform. enum: - apple - spotify type: string source_updated_at: description: Timestamp the source itself reported for the chart, when present. format: date-time type: string view_count: description: YouTube channel view count when the source is YouTube. format: int64 type: integer weekly_avg_downloads: description: Source-supplied weekly download estimate (Triton/Podtrac sources). format: int64 type: integer required: - id - source - chart_type - rank - captured_at - is_current - external_id - show 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 Category: additionalProperties: false properties: external_id: description: >- Source-native identifier for the category. For Apple this is the iTunes genre id; for Spotify it duplicates the slug. type: string name: description: Display name of the category. type: string parent_slug: description: >- Slug of the parent category, when this is a sub-category of a known hierarchy (Apple). type: string slug: description: >- Universal category slug (e.g. 'comedy', 'business'). Stable across sources, accepted as a filter on every rankings endpoint. type: string required: - slug - name type: object PodcastCompact: additionalProperties: false properties: id: description: Podcast ID type: string image_url: description: Cover image URL type: string 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 ShowSummary: additionalProperties: false properties: content_advisory_rating: description: Source-supplied content advisory rating (e.g. 'clean', 'explicit'). type: string description: description: Show description as reported by the source. type: string feed_url: description: Show's RSS feed URL as reported by the source. type: string genres: description: Source-reported genre tags (Apple). items: $ref: '#/components/schemas/Genre' type: - array - 'null' image_url: description: Best-quality cover art URL available from the source. type: string language: description: ISO 639 language tag as reported by the source. type: string latest_release_date: description: Source-reported latest episode release date, when present. format: date-time type: string name: description: Show name as reported by the source. type: string publisher: description: Publisher name as reported by the source. type: string total_episodes: description: Source-reported episode count, when present. format: int64 type: integer required: - name 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 Genre: additionalProperties: false properties: external_id: description: Source-native genre id. type: string name: description: Display name of the genre. type: string required: - external_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 ````