Databento

Databento Live Streaming API

Low-latency live market data delivered over a raw TCP binary streaming protocol using Databento Binary Encoding (DBN) - the same normalized schemas as the historical API. Sessions authenticate with a CRAM challenge-response handshake using your API key, then subscribe to symbols and schemas per dataset gateway. This is a binary TCP protocol, not a documented public WebSocket; it is consumed via the official Python, C++, and Rust clients and has no OpenAPI description.

GitHub

Documentation

📖
Documentation
https://databento.com/docs/api-reference-live
📖
Authentication
https://databento.com/docs/api-reference-live/basics/authentication
📖
Documentation
https://databento.com/docs/standards-and-conventions/databento-binary-encoding

API entry from apis.yml

apis.yml Raw ↑ 
aid: databento:databento-live-streaming-api
name: Databento Live Streaming API
tags:
- Live Market Data
- Streaming
- Market Data
- Trading
- Low Latency
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
humanURL: https://databento.com/docs/api-reference-live
baseURL: tcp://GLBX.MDP3.lsg.databento.com
properties:
- url: https://databento.com/docs/api-reference-live
  type: Documentation
- url: https://databento.com/docs/api-reference-live/basics/authentication
  type: Authentication
- url: https://databento.com/docs/standards-and-conventions/databento-binary-encoding
  type: Documentation
description: Low-latency live market data delivered over a raw TCP binary streaming protocol using Databento
  Binary Encoding (DBN) - the same normalized schemas as the historical API. Sessions authenticate with
  a CRAM challenge-response handshake using your API key, then subscribe to symbols and schemas per dataset
  gateway. This is a binary TCP protocol, not a documented public WebSocket; it is consumed via the official
  Python, C++, and Rust clients and has no OpenAPI description.