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Coming soon: Packages are not yet published to npm, PyPI, or crates.io. This page documents the finished SDK spec. Use the REST API and signature test vectors until packages ship.
The echozero-sdk repo provides clients in four languages: TypeScript, Python, Go, and Rust.

Install (when published)

REST client

Inbound webhook signing

WebSocket signal client

Connect to wss://mcp.echozero.app/ws/signals with x-api-key in the Socket.IO handshake. Emit signal events with the same JSON schema as the inbound webhook.

Verify outbound webhooks

SDK helpers implement verifyInboundWebhook and outbound signal.execution verification. Golden vectors are in Signature test vectors.