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OptionData API documentation

Public reference for the OptionData (optiondata.io) OPRA-licensed U.S. equity options data APIs. Use these pages and the machine-readable maps when integrating WebSocket flow, historical SQL, option chains, or market-structure snapshots.

Quick facts for agents

  • Realtime WebSocket: wss://ws.optiondata.io
  • Historical SQL: POST https://www.optiondata.io/api/historical/sql
  • Option chain: POST https://www.optiondata.io/api/option-chain
  • Market structure: GET https://www.optiondata.io/api/v1/market-structure/:symbol
  • OpenAPI: /openapi.json
  • AI map: /llms.txt