19 June 2026

WhatsApp Platform API launch

New feature.

First public release. REST v1 at https://cloudapi.wasync.app/api/v1: GET /connections, GET /messages (cursor-paginated) and POST /messages (text, idempotent via idempotencyKey).

Auth is OAuth 2.0 Authorization Code + PKCE (S256 required, client_secret_post) with discovery under /.well-known/.

A remote MCP server at /api/mcp exposes list_whatsapp_connections, send_whatsapp_message and read_whatsapp_messages.

Webhooks deliver message.received with HMAC-SHA256 signatures (X-WASync-Signature). App registration lives at https://developers.wasync.app; the AI integration kit (/docs, /openapi.json, /llms.txt) shipped the same day.