> ## 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 companies > Returns a paginated list of companies. Filter by entity slug (e.g., 'apple'), ticker, domain, CIK, or QID. Search by name or fetch updates since a timestamp. ## OpenAPI ````yaml /openapi.json get /v1/companies 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/companies: get: tags: - Companies - tier:standard summary: List companies description: >- Returns a paginated list of companies. Filter by entity slug (e.g., 'apple'), ticker, domain, CIK, or QID. Search by name or fetch updates since a timestamp. operationId: list-companies 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: Search by name (case-insensitive partial match) explode: false in: query name: q schema: description: Search by name (case-insensitive partial match) examples: - Apple maxLength: 200 type: string - description: >- Only items updated after this ISO 8601 date or date-time (e.g. 2024-01-01 or 2024-01-01T00:00:00Z). Useful for incremental syncing. explode: false in: query name: updated_after schema: description: >- Only items updated after this ISO 8601 date or date-time (e.g. 2024-01-01 or 2024-01-01T00:00:00Z). Useful for incremental syncing. examples: - '2024-01-01T00:00:00Z' type: string - description: >- Bulk multi-get: one or more company slugs (e.g. 'apple'), domains (e.g. 'apple.com'), or IDs, comma-separated (max 100) — the same identifiers GET /v1/companies/{id} accepts. When set, returns exactly those companies and the other filters/search and pagination are ignored. Refs that don't resolve are omitted from the response. explode: false in: query name: ids schema: description: >- Bulk multi-get: one or more company slugs (e.g. 'apple'), domains (e.g. 'apple.com'), or IDs, comma-separated (max 100) — the same identifiers GET /v1/companies/{id} accepts. When set, returns exactly those companies and the other filters/search and pagination are ignored. Refs that don't resolve are omitted from the response. examples: - - apple - tesla.com - nvidia items: type: string maxItems: 100 type: - array - 'null' - description: Filter by stock ticker symbol(s), comma-separated explode: false in: query name: ticker schema: description: Filter by stock ticker symbol(s), comma-separated examples: - - AAPL - GOOG items: type: string maxItems: 100 type: - array - 'null' - description: Filter by company domain(s), comma-separated explode: false in: query name: domain schema: description: Filter by company domain(s), comma-separated examples: - - apple.com items: type: string maxItems: 100 type: - array - 'null' - description: Filter by SEC CIK(s), comma-separated explode: false in: query name: cik schema: description: Filter by SEC CIK(s), comma-separated examples: - - '0000320193' items: type: string maxItems: 100 type: - array - 'null' - description: Filter by Wikidata QID(s), comma-separated explode: false in: query name: qid schema: description: Filter by Wikidata QID(s), comma-separated examples: - - Q312 items: type: string maxItems: 100 type: - array - 'null' - description: Entity slug(s) (e.g., 'apple', 'nvidia') or ID(s), comma-separated explode: false in: query name: entity_id schema: description: Entity slug(s) (e.g., 'apple', 'nvidia') or ID(s), comma-separated items: type: string maxItems: 100 type: - array - 'null' responses: '200': content: application/json: schema: $ref: '#/components/schemas/PageCompany' 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/companies?limit=25" components: schemas: PageCompany: additionalProperties: false properties: cursor: description: Pass to next request for more results type: string data: description: List of results items: $ref: '#/components/schemas/Company' 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 Company: additionalProperties: false properties: description: description: Company description type: string id: description: Unique identifier type: string identifiers: $ref: '#/components/schemas/CompanyIdentifiers' description: External identifiers name: description: Company name type: string updated_at: description: Last updated timestamp format: date-time type: string required: - id - name 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 CompanyIdentifiers: additionalProperties: false properties: cik: description: SEC Central Index Key type: string domain: description: Company domain type: string entity: $ref: '#/components/schemas/EntityCompact' description: Linked knowledge graph entity qid: description: Wikidata QID type: string ticker: description: Primary stock ticker symbol type: string type: object EntityCompact: additionalProperties: false properties: company: $ref: '#/components/schemas/EntityCompany' description: Linked company record, if this entity is a known company description: description: Short description type: string id: description: Entity ID type: string image_url: description: Entity image URL type: string name: description: Entity name type: string person: $ref: '#/components/schemas/EntityPerson' description: Linked person record, if this entity is a known person slug: description: Human-readable slug identifier type: string type: $ref: '#/components/schemas/EntityType' description: Category. Omitted when the entity falls outside the supported set. wikipedia_url: description: Wikipedia URL type: string required: - id - slug - name type: object EntityCompany: additionalProperties: false properties: domain: description: Company website domain type: string id: description: Company identifier type: string ticker: description: Primary stock ticker symbol type: string required: - id type: object EntityPerson: additionalProperties: false properties: company: description: Current company name type: string id: description: Person identifier type: string image_url: description: Person headshot URL type: string title: description: Current role title type: string required: - id type: object EntityType: additionalProperties: false properties: name: description: Human-friendly display label (e.g. 'Company'). type: string slug: description: >- Stable identifier, safe to pass to the type query parameter (e.g. 'company'). type: string required: - slug - 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 ````