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WebSocketCrypto

Chainlink Data Streams (WebSocket API)

Chainlink Data Streams (WebSocket API) is a websocket from Chainlink (SmartContract / Chainlink Labs) providing crypto data. Chainlink Data Streams is a low-latency, pull-based oracle that delivers sub-second, cryptographically signed price reports over WebSocket (and REST), verifiable on-chain. For a Polymarket bot it provides the same decentralized BTC/ETH/altcoin oracle layer that underlies "will X close above $Y" markets, giving an authoritative mid and liquidity-weighted bid/ask reference to price and hedge those markets faster than block-confirmed feeds.

At a glance

ProviderChainlink (SmartContract / Chainlink Labs)
TypeWebSocket
CategoryCrypto
Real-timeYes — streaming
AuthAPI key
PricingContact sales; custom subscription. Free testnet endpoint with API credentials (pay-per-verification model deprecated). — Testnet: free streaming via wss://ws.testnet-dataengine.chain.link (requires issued API credentials), Mainnet: subscription-based billing — pricing not public, contact Chainlink for access and terms, Legacy pay-per-verification billing model is deprecated

What data it provides

  • Benchmark mid price per stream (Report Schema v3 for crypto, e.g. BTC/USD, ETH/USD)
  • LWBA (liquidity-weighted bid and ask) quotes published alongside the benchmark price
  • Market-status / staleness indicators flagging offline or unavailable markets
  • Signed fullReport blob + feedID payload for on-chain verification
  • Report timestamps (observationsTimestamp / validFromTimestamp) for freshness checks
  • Additional schemas cover FX/exchange rates (v7), equities & RWAs (v8/v11), tokenized assets (v10)

Features

  • Sub-second, real-time price reports streamed over WebSocket (wss://ws.dataengine.chain.link/api/v1/ws)
  • Pull-based oracle design with verifiable, cryptographically signed reports for on-chain use
  • Official SDKs in Go, Rust, and TypeScript that auto-handle auth and report decoding
  • Multi-site, distributed infrastructure targeting 99.9%+ uptime
  • Coverage spans crypto (BTC/ETH/altcoins) plus FX, US equities, ETFs, and commodities
  • REST API also available for on-demand report retrieval alongside the WS stream

Links

Use it in a bot

Other crypto data sources

Listed, not endorsed. Pricing and capabilities change without notice — check the provider's own documentation before you depend on anything here. Browse the full data resources directory or the strategy database.
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