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OpenAPI Specification

openapi: 3.2.0
info:
  title: Transpose Block SQL Analytics API
  description: 'Historical blockchain data REST API providing access to transaction history, token transfers, NFT metadata, smart contract events, DEX swaps, and price data across Ethereum and other EVM-compatible chains. Offers five enterprise-grade REST APIs plus a SQL Analytics API for querying indexed blockchain data across Ethereum, Polygon, Optimism, Base, Arbitrum, Avalanche, BSC, Bitcoin, and Tron.

    '
  version: 1.0.0
  contact:
    name: Transpose Support
    url: https://www.transpose.io/
  license:
    name: Commercial
    url: https://www.transpose.io/pricing
servers:
- url: https://api.transpose.io
  description: Transpose production API
security:
- ApiKeyAuth: []
tags:
- name: SQL Analytics API
  description: 'Custom SQL query interface against Transpose''s entire indexed blockchain dataset.

    '
paths:
  /sql:
    post:
      tags:
      - SQL Analytics API
      summary: Execute SQL Query
      operationId: executeSqlQuery
      description: 'Execute a custom SQL query against Transpose''s entire indexed blockchain dataset. Tables are namespaced by chain (e.g., ethereum.nft_sales, polygon.tokens). Supports pagination, parameterized queries, and cross-chain multichain queries. Credits consumed are returned in the X-Credits-Charged response header.

        '
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/SqlQueryRequest'
            examples:
              nft_sales:
                summary: Recent NFT sales on Ethereum
                value:
                  sql: SELECT * FROM ethereum.nft_sales ORDER BY timestamp DESC LIMIT 10;
              token_transfers:
                summary: Recent USDC transfers
                value:
                  sql: SELECT * FROM ethereum.token_transfers WHERE contract_address = '0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48' ORDER BY timestamp DESC LIMIT 25;
              block_query:
                summary: Recent blocks
                value:
                  sql: SELECT block_number, timestamp, transaction_count FROM ethereum.blocks ORDER BY block_number DESC LIMIT 5;
      responses:
        '200':
          description: Successful query response.
          headers:
            X-Credits-Charged:
              schema:
                type: integer
              description: Number of API credits consumed by this query.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/SqlQueryResponse'
        '400':
          description: Bad request — invalid SQL syntax or unsupported query.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
        '401':
          description: Unauthorized — missing or invalid API key.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
        '429':
          description: Rate limit exceeded.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
components:
  schemas:
    SqlQueryRequest:
      type: object
      required:
      - sql
      properties:
        sql:
          type: string
          description: 'SQL query against Transpose''s indexed blockchain data. Tables are namespaced by chain (e.g., ethereum.nft_sales, polygon.tokens).

            '
          example: SELECT * FROM ethereum.nft_sales ORDER BY timestamp DESC LIMIT 10;
    SqlQueryResponse:
      type: object
      properties:
        status:
          type: string
          description: Query status.
        results:
          type: array
          items:
            type: object
            additionalProperties: true
          description: Array of result rows as key-value objects.
        columns:
          type: array
          items:
            type: string
          description: Column names of the result set.
    ErrorResponse:
      type: object
      properties:
        status:
          type: string
          example: error
        message:
          type: string
          description: Human-readable error description.
  securitySchemes:
    ApiKeyAuth:
      type: apiKey
      in: header
      name: X-API-KEY
      description: API key obtained from your Transpose team dashboard.