> ## Documentation Index > Fetch the complete documentation index at: https://docs.felixfusion.ai/llms.txt > Use this file to discover all available pages before exploring further. # Query dataset > Query a dataset with time filters, pagination, selected columns, and optional resampling. ## OpenAPI ````yaml GET /v1/datasets/{dataset_id}/query openapi: 3.1.0 info: title: GridCertainty Public API description: >- Read-only public API for ERCOT datasets, pricing locations, reports, and system metadata. version: 1.0.0 servers: - url: https://api.felixfusion.ai description: Production public API - url: http://localhost:8001 description: Local public API security: - ApiKeyHeader: [] - ApiKeyQuery: [] paths: /v1/datasets/{dataset_id}/query: get: tags: - Query Data summary: Query dataset description: >- Query a dataset with time filters, pagination, selected columns, and optional resampling. operationId: query_dataset parameters: - $ref: '#/components/parameters/dataset_id' - $ref: '#/components/parameters/order' - $ref: '#/components/parameters/filter_column' - $ref: '#/components/parameters/filter_value' - $ref: '#/components/parameters/filter_operator' - $ref: '#/components/parameters/limit' - $ref: '#/components/parameters/page' - $ref: '#/components/parameters/page_size' - $ref: '#/components/parameters/columns' - $ref: '#/components/parameters/cursor' - $ref: '#/components/parameters/timezone' - $ref: '#/components/parameters/time' - $ref: '#/components/parameters/time_comparison' - $ref: '#/components/parameters/start_time' - $ref: '#/components/parameters/end_time' - $ref: '#/components/parameters/publish_time' - $ref: '#/components/parameters/publish_time_start' - $ref: '#/components/parameters/publish_time_end' - $ref: '#/components/parameters/resample_frequency' - $ref: '#/components/parameters/resample_by' - $ref: '#/components/parameters/resample_function' - $ref: '#/components/parameters/return_format' - $ref: '#/components/parameters/download' - $ref: '#/components/parameters/json_schema' responses: '200': description: Query results content: application/json: schema: $ref: '#/components/schemas/QueryDatasetResponse' text/csv: schema: type: string '404': $ref: '#/components/responses/NotFound' components: parameters: dataset_id: name: dataset_id in: path required: true schema: type: string description: Dataset identifier. order: name: order in: query schema: type: string enum: - asc - desc default: asc description: Sort order. filter_column: name: filter_column in: query schema: type: string description: Column name to filter on. filter_value: name: filter_value in: query schema: type: string description: Filter value for the selected filter column. filter_operator: name: filter_operator in: query schema: type: string default: eq description: Filter operator. limit: name: limit in: query schema: type: integer description: Optional limit for returned rows. page: name: page in: query schema: type: integer default: 1 description: Page number. page_size: name: page_size in: query schema: type: integer default: 500 description: Page size. columns: name: columns in: query schema: type: string description: Comma-separated list of columns to return. cursor: name: cursor in: query schema: type: string description: Cursor for pagination. timezone: name: timezone in: query schema: type: string default: UTC description: Timezone for localized datetime output. time: name: time in: query schema: type: string description: Single timestamp filter value. time_comparison: name: time_comparison in: query schema: type: string default: '=' description: Comparison operator for `time`. start_time: name: start_time in: query schema: type: string description: Start of time range filter. end_time: name: end_time in: query schema: type: string description: End of time range filter. publish_time: name: publish_time in: query schema: type: string description: Single publish time filter. publish_time_start: name: publish_time_start in: query schema: type: string description: Start of publish time range filter. publish_time_end: name: publish_time_end in: query schema: type: string description: End of publish time range filter. resample_frequency: name: resample_frequency in: query schema: type: string description: Resample interval such as `5min` or `1h`. resample_by: name: resample_by in: query schema: type: string description: Comma-separated grouping columns for resampling. resample_function: name: resample_function in: query schema: type: string default: mean description: Aggregation function used during resampling. return_format: name: return_format in: query schema: type: string enum: - json - csv default: json description: Return response as JSON or CSV. download: name: download in: query schema: type: boolean default: false description: Set true to request a downloadable attachment response. json_schema: name: json_schema in: query schema: type: string default: array_of_objects description: Optional JSON schema output mode. schemas: QueryDatasetResponse: type: object properties: data: type: array items: type: object additionalProperties: true meta: $ref: '#/components/schemas/Metadata' dataset_metadata: type: object additionalProperties: true Metadata: type: object properties: page: type: - integer - 'null' limit: type: - integer - 'null' page_size: type: - integer - 'null' hasNextPage: type: - boolean - 'null' cursor: type: - string - 'null' additionalProperties: true ErrorResponse: type: object properties: detail: oneOf: - type: string - type: object additionalProperties: true responses: NotFound: description: Resource not found content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' example: detail: Dataset not found securitySchemes: ApiKeyHeader: type: apiKey in: header name: x-api-key ApiKeyQuery: type: apiKey in: query name: api_key ````