Quandl (Nasdaq Data Link) Datasets API

openapi: 3.1.0
info:
  title: Nasdaq Data Link Time-Series REST Databases Datasets API
  description: Nasdaq Data Link REST API (formerly Quandl) provides access to financial and economic time-series datasets including stock prices, economic indicators, interest rates, and commodity data in JSON, XML, and CSV formats. Authenticated users receive up to 50,000 API calls per day.
  version: 3.0.0
  contact:
    name: Nasdaq Data Link Support
    url: https://docs.data.nasdaq.com/docs/contact-support
  license:
    name: Nasdaq Data Link Terms of Use
    url: https://data.nasdaq.com/terms
servers:
- url: https://data.nasdaq.com/api/v3
  description: Nasdaq Data Link API
security:
- apiKeyQuery: []
- apiKeyHeader: []
tags:
- name: Datasets
  description: Time-series dataset retrieval
paths:
  /datasets/{databaseCode}/{datasetCode}:
    get:
      operationId: getDataset
      summary: Get a time-series dataset
      description: Returns time-series data from a Nasdaq Data Link dataset. Supports date range filtering, column selection, frequency transformation, and return type selection (JSON, XML, CSV).
      tags:
      - Datasets
      parameters:
      - $ref: '#/components/parameters/DatabaseCode'
      - $ref: '#/components/parameters/DatasetCode'
      - name: limit
        in: query
        description: Number of rows to return (0 returns all)
        schema:
          type: integer
          default: 100
          maximum: 10000
      - name: column_index
        in: query
        description: Request a specific column (1-based index)
        schema:
          type: integer
      - name: start_date
        in: query
        description: Retrieve data rows on and after this date (YYYY-MM-DD)
        schema:
          type: string
          format: date
      - name: end_date
        in: query
        description: Retrieve data rows up to and including this date (YYYY-MM-DD)
        schema:
          type: string
          format: date
      - name: order
        in: query
        description: Return data in ascending or descending date order
        schema:
          type: string
          enum:
          - asc
          - desc
          default: desc
      - name: collapse
        in: query
        description: Frequency to collapse data to
        schema:
          type: string
          enum:
          - none
          - daily
          - weekly
          - monthly
          - quarterly
          - annual
          default: none
      - name: transform
        in: query
        description: Mathematical transformation to apply to values
        schema:
          type: string
          enum:
          - none
          - diff
          - rdiff
          - rdiff_from
          - cumul
          - normalize
          default: none
      - name: api_key
        in: query
        description: Your Nasdaq Data Link API key
        schema:
          type: string
      responses:
        '200':
          description: Dataset data
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/DatasetResponse'
        '400':
          $ref: '#/components/responses/BadRequest'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
        '429':
          $ref: '#/components/responses/RateLimited'
  /datasets/{databaseCode}/{datasetCode}/metadata:
    get:
      operationId: getDatasetMetadata
      summary: Get dataset metadata
      description: Returns metadata for a dataset including column names, description, and date range.
      tags:
      - Datasets
      parameters:
      - $ref: '#/components/parameters/DatabaseCode'
      - $ref: '#/components/parameters/DatasetCode'
      responses:
        '200':
          description: Dataset metadata
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/DatasetMetadataResponse'
        '404':
          $ref: '#/components/responses/NotFound'
components:
  schemas:
    DatasetResponse:
      type: object
      properties:
        dataset:
          $ref: '#/components/schemas/DatasetWithData'
    DatasetWithData:
      type: object
      properties:
        id:
          type: integer
          description: Internal dataset ID
        dataset_code:
          type: string
        database_code:
          type: string
        name:
          type: string
        description:
          type: string
        refreshed_at:
          type: string
          format: date-time
        newest_available_date:
          type: string
          format: date
        oldest_available_date:
          type: string
          format: date
        column_names:
          type: array
          description: Column names in order matching data rows
          items:
            type: string
          example:
          - Date
          - Open
          - High
          - Low
          - Close
          - Volume
          - Adj. Close
        frequency:
          type: string
          enum:
          - annual
          - quarterly
          - monthly
          - weekly
          - daily
        type:
          type: string
          enum:
          - Time Series
        premium:
          type: boolean
          description: True if this is a premium (paid) dataset
        data:
          type: array
          description: Array of data rows; each row matches column_names order
          items:
            type: array
            items:
              oneOf:
              - type: string
              - type: number
              - type: 'null'
        start_date:
          type: string
          format: date
        end_date:
          type: string
          format: date
    DatasetMetadataResponse:
      type: object
      properties:
        dataset:
          type: object
          properties:
            id:
              type: integer
            dataset_code:
              type: string
            database_code:
              type: string
            name:
              type: string
            description:
              type: string
            refreshed_at:
              type: string
              format: date-time
            newest_available_date:
              type: string
              format: date
            oldest_available_date:
              type: string
              format: date
            column_names:
              type: array
              items:
                type: string
            frequency:
              type: string
            type:
              type: string
            premium:
              type: boolean
    QuandlError:
      type: object
      properties:
        quandl_error:
          type: object
          properties:
            code:
              type: string
            message:
              type: string
  responses:
    NotFound:
      description: Dataset or database not found
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/QuandlError'
    RateLimited:
      description: Rate limit exceeded
      headers:
        X-RateLimit-Limit:
          schema:
            type: integer
          description: Number of requests allowed per day
        X-RateLimit-Remaining:
          schema:
            type: integer
          description: Number of requests remaining today
        X-RateLimit-Reset:
          schema:
            type: integer
          description: Epoch timestamp when limit resets
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/QuandlError'
    BadRequest:
      description: Invalid request parameters
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/QuandlError'
    Unauthorized:
      description: Invalid or missing API key
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/QuandlError'
  parameters:
    DatabaseCode:
      name: databaseCode
      in: path
      required: true
      description: Database code (e.g., FRED, WIKI, CHRIS, BCOM)
      schema:
        type: string
    DatasetCode:
      name: datasetCode
      in: path
      required: true
      description: Dataset code within the database (e.g., GDP, AAPL)
      schema:
        type: string
  securitySchemes:
    apiKeyQuery:
      type: apiKey
      in: query
      name: api_key
      description: Nasdaq Data Link API key passed as query parameter
    apiKeyHeader:
      type: apiKey
      in: header
      name: X-Api-Token
      description: Nasdaq Data Link API key passed as header