openapi: 3.0.1
info:
  title: Blockchair Address Dashboards Outputs Database API
  description: The Blockchair API provides unified, multi-blockchain access to on-chain data across 40+ blockchains. It exposes per-chain dashboards (address, transaction, block), raw node data, network statistics, a SQL-like database query interface (blocks, transactions, outputs, addresses), and transaction broadcasting. Requests are authenticated with an optional `key` query parameter; up to 1440 requests per day are allowed without a key for personal or testing use.
  termsOfService: https://blockchair.com/api/docs
  contact:
    name: Blockchair Support
    url: https://github.com/Blockchair/Blockchair.Support
  version: 2.0.80
servers:
- url: https://api.blockchair.com
  description: Blockchair production API
security:
- apiKey: []
tags:
- name: Outputs Database
  description: SQL-like database query interface.
paths:
  /{chain}/outputs:
    get:
      operationId: queryOutputs
      tags:
      - Outputs Database
      summary: Query the outputs database
      description: SQL-like query over the outputs table on Bitcoin-like chains, supporting filtering by column, sorting, aggregation, offset, and limit.
      parameters:
      - $ref: '#/components/parameters/chain'
      - name: q
        in: query
        required: false
        description: Filter expression, e.g. `recipient(1A1zP...),is_spent(false)`.
        schema:
          type: string
      - name: s
        in: query
        required: false
        description: Sort expression, e.g. `value(desc)`.
        schema:
          type: string
      - name: a
        in: query
        required: false
        description: Aggregation expression, e.g. `sum(value)`.
        schema:
          type: string
      - $ref: '#/components/parameters/limit'
      - $ref: '#/components/parameters/offset'
      - $ref: '#/components/parameters/key'
      responses:
        '200':
          description: OK
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/DatabaseResponse'
  /{chain}/blocks:
    get:
      operationId: queryBlocks
      tags:
      - Outputs Database
      summary: Query the blocks database
      description: SQL-like query over the blocks table on Bitcoin-like chains.
      parameters:
      - $ref: '#/components/parameters/chain'
      - name: q
        in: query
        required: false
        schema:
          type: string
      - $ref: '#/components/parameters/limit'
      - $ref: '#/components/parameters/offset'
      - $ref: '#/components/parameters/key'
      responses:
        '200':
          description: OK
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/DatabaseResponse'
  /{chain}/transactions:
    get:
      operationId: queryTransactions
      tags:
      - Outputs Database
      summary: Query the transactions database
      description: SQL-like query over the transactions table.
      parameters:
      - $ref: '#/components/parameters/chain'
      - name: q
        in: query
        required: false
        schema:
          type: string
      - $ref: '#/components/parameters/limit'
      - $ref: '#/components/parameters/offset'
      - $ref: '#/components/parameters/key'
      responses:
        '200':
          description: OK
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/DatabaseResponse'
components:
  parameters:
    limit:
      name: limit
      in: query
      required: false
      description: Maximum number of rows to return.
      schema:
        type: integer
    key:
      name: key
      in: query
      required: false
      description: API key.
      schema:
        type: string
    offset:
      name: offset
      in: query
      required: false
      description: Number of rows to skip.
      schema:
        type: integer
    chain:
      name: chain
      in: path
      required: true
      description: Blockchain slug (e.g. bitcoin, ethereum, litecoin, dogecoin).
      schema:
        type: string
        example: bitcoin
  schemas:
    DatabaseResponse:
      type: object
      properties:
        data:
          type: array
          description: Array of result rows from the database query.
          items:
            type: object
        context:
          $ref: '#/components/schemas/Context'
    Context:
      type: object
      description: Metadata describing the request, cost, and server state.
      properties:
        code:
          type: integer
          example: 200
        source:
          type: string
        results:
          type: integer
        state:
          type: integer
          description: Current best block height of the chain.
        cache:
          type: object
        api:
          type: object
          properties:
            version:
              type: string
            last_major_update:
              type: string
            next_major_update:
              type: string
        request_cost:
          type: number
          description: Number of API request units this call consumed.
        time:
          type: number
  securitySchemes:
    apiKey:
      type: apiKey
      in: query
      name: key
      description: Optional API key passed as the `key` query parameter. Up to 1440 requests per day are allowed without a key for personal/testing use.