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API Overview ​

Reference for Signal API V2 endpoint groups.

What is API V2? ​

API V2 is the public HTTP interface used by Signal clients and external integrations. It groups the available routes into focused areas for projects, jobs, posts, and tagging.

Scope ​

This documentation covers V2 endpoints only (/v2/...).

Authentication ​

Most endpoints require API key authentication. See Authentication.

API areas ​

Doc rev.1.12.3 2026.05.08