> ## 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. # Rank publishers by political bias metric > Returns a paginated leaderboard ranking publishers by a chosen bias metric: most_left_leaning, most_right_leaning, most_political, most_diverse, most_monolithic, or most_analyzed. min_analyzed_podcasts and min_political_podcasts gate small-sample publishers from the ranking. Optional political_context, since, and until restrict the corpus before aggregation. ## OpenAPI ````yaml /openapi.json get /v1/podcasts/bias/publishers/leaderboard 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/bias/publishers/leaderboard: get: tags: - Podcast Bias - tier:premium summary: Rank publishers by political bias metric description: >- Returns a paginated leaderboard ranking publishers by a chosen bias metric: most_left_leaning, most_right_leaning, most_political, most_diverse, most_monolithic, or most_analyzed. min_analyzed_podcasts and min_political_podcasts gate small-sample publishers from the ranking. Optional political_context, since, and until restrict the corpus before aggregation. operationId: get-podcast-publisher-bias-leaderboard 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 metric. most_left/right_leaning rank by avg_lean_score; most_political by share of political podcasts in the catalog; most_diverse / most_monolithic by stddev of lean across political podcasts; most_analyzed by catalog coverage. explode: false in: query name: metric required: true schema: description: >- Ranking metric. most_left/right_leaning rank by avg_lean_score; most_political by share of political podcasts in the catalog; most_diverse / most_monolithic by stddev of lean across political podcasts; most_analyzed by catalog coverage. enum: - most_left_leaning - most_right_leaning - most_political - most_diverse - most_monolithic - most_analyzed type: string - description: >- Restrict the underlying corpus to a single political framework before aggregating. explode: false in: query name: political_context schema: description: >- Restrict the underlying corpus to a single political framework before aggregating. enum: - US - UK - EU - CANADA - AUSTRALIA - INDIA - OTHER - UNKNOWN type: string - description: >- Only rank publishers with at least this many analyzed podcasts. Below the default of 5, aggregate signals are unreliable. explode: false in: query name: min_analyzed_podcasts schema: default: 5 description: >- Only rank publishers with at least this many analyzed podcasts. Below the default of 5, aggregate signals are unreliable. format: int64 maximum: 500 minimum: 1 type: integer - description: >- Only rank publishers with at least this many political podcasts. Applied to score and diversity metrics; ignored for coverage metrics. explode: false in: query name: min_political_podcasts schema: default: 5 description: >- Only rank publishers with at least this many political podcasts. Applied to score and diversity metrics; ignored for coverage metrics. format: int64 maximum: 500 minimum: 1 type: integer - description: Restrict to analyses evaluated on or after this timestamp (RFC 3339) explode: false in: query name: since schema: description: >- Restrict to analyses evaluated on or after this timestamp (RFC 3339) format: date-time type: string - description: >- Restrict to analyses evaluated strictly before this timestamp (RFC 3339) explode: false in: query name: until schema: description: >- Restrict to analyses evaluated strictly before this timestamp (RFC 3339) format: date-time type: string responses: '200': content: application/json: schema: $ref: '#/components/schemas/PagePodcastPublisherBiasLeaderboardEntry' 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/bias/publishers/leaderboard?limit=25&metric=most_left_leaning&min_analyzed_podcasts=5&min_political_podcasts=5" components: schemas: PagePodcastPublisherBiasLeaderboardEntry: additionalProperties: false properties: cursor: description: Pass to next request for more results type: string data: description: List of results items: $ref: '#/components/schemas/PodcastPublisherBiasLeaderboardEntry' 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 PodcastPublisherBiasLeaderboardEntry: additionalProperties: false properties: coverage: $ref: '#/components/schemas/PodcastPublisherBiasCoverage' description: Catalog size and how much of it has been analyzed last_evaluated_at: description: Most recent evaluated_at across the publisher's analyses format: date-time type: string lean: $ref: '#/components/schemas/PodcastPublisherBiasLean' description: >- Ideological lean across political podcasts. Absent from the response when political_content.podcasts == 0. political_content: $ref: '#/components/schemas/PodcastPublisherBiasPoliticalContent' description: How political the analyzed catalog is, regardless of which side publisher: $ref: '#/components/schemas/PodcastPublisherCompact' description: Publisher reference rank: description: Position in the leaderboard format: int64 type: integer required: - rank - publisher - coverage - political_content 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 PodcastPublisherBiasCoverage: additionalProperties: false properties: analyzed_coverage: description: >- analyzed_podcasts / total_podcasts (0..1). Treat as a confidence proxy for the rolled-up verdict. format: double type: number analyzed_podcasts: description: >- Number of catalog podcasts with at least one non-deleted bias analysis format: int64 type: integer total_podcasts: description: >- Number of podcasts in the publisher's catalog (denormalized from podcast_publishers.podcast_count) format: int64 type: integer required: - total_podcasts - analyzed_podcasts - analyzed_coverage type: object PodcastPublisherBiasLean: additionalProperties: false properties: avg_score: description: >- Average lean across political podcasts on a -3 (extreme left) to +3 (extreme right) ordinal scale: EXTREME_LEFT=-3, LEFT=-2, LEANS_LEFT=-1, CENTER=0, LEANS_RIGHT=+1, RIGHT=+2, EXTREME_RIGHT=+3. format: double type: - number - 'null' dominant_bias: description: >- Modal political bias bucket across the publisher's political podcasts. type: string stddev: description: >- Sample standard deviation of the lean score across political podcasts — a diversity signal. Low = monolithic publisher; high = heterogeneous catalog. Null when only one political podcast (stddev undefined for n=1). format: double type: - number - 'null' required: - avg_score - stddev - dominant_bias type: object PodcastPublisherBiasPoliticalContent: additionalProperties: false properties: avg_topic_percentage: description: >- Average share of episodes flagged under one of the political root topics across analyzed podcasts (0..1). Sparse — omitted when no analyzed podcast carries this signal. format: double type: number podcasts: description: Analyzed podcasts whose latest result is not NOT_POLITICAL format: int64 type: integer share: description: >- podcasts / analyzed_podcasts (0..1) — distinguishes news-heavy publishers from entertainment-heavy publishers format: double type: number required: - podcasts - share 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 ````