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Alchemy WebSockets are available through Uniblock for broad multi-chain streaming support.

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Supported chains

Alchemy supports many networks, including:
  • 1
  • 10
  • 137
  • 8453
  • 42161
  • stellar-mainnet
  • stellar-testnet

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Endpoints

  • HTTP (Validation): https://websocket.uniblock.dev/alchemy/validate?chainId=${chainId}
  • WebSocket (WSS): wss://websocket.uniblock.dev/alchemy?chainId=${chainId}

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Authentication

  • Include the X-API-KEY header in both validation and connection requests.
  • Reuse the same chainId and headers when moving from validation to WSS.

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Workflow

  1. Validate against the Alchemy HTTP endpoint.
  2. Open the matching WSS endpoint.
  3. Send your JSON-RPC subscription payload.

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Resources