API Documentation

General information

• Open API documentation: https://open-api.capital.com/
• Base URL: https://api-capital.backend-capital.com/
• Base URL demo: https://demo-api-capital.backend-capital.com/
• WebSocket streaming service:
  wss://api-streaming-capital.backend-capital.com/connect
• In order to use the endpoints a session should be launched. This can be done using the POST ​​/session endpoint.
• The API covers the full range of available instruments, licences and trading functionality.
• Trading, general account and market prices functionality is available with the REST API GET /prices prices can be also found in the WebSocket API.

API limitations

• The maximum request rate is 10 per second.
• WebSocket session duration is 10 minutes. In order to keep the session live use the ping endpoint.
• POST /positions and POST /workingOrders endpoint limit is 1000 requests per hour in the Demo account.
• The WebSocket API allows subscription to a maximum of 40 instruments.
• WebSocket streaming falls off when the financial account is changed with the help of the PUT​ /session endpoint.