💬 Facebook Messenger

Connect a Facebook Page Messenger account to send + receive messages from inside Synalux.

📨 Messenger Send / Receive

• Webhook — /api/v1/messenger/webhook receives Page-bound messages; Meta signature validated.
• Send — /api/v1/messenger/send posts to Meta’s /me/messages endpoint with appsecret_proof HMAC-SHA256 protection on every call (defense against access-token leak).
• Page-scoped — one Facebook Page connection per workspace.
• 24-hour window + tags — outbound after 24h must use MESSAGE_TAG per Meta policy.

🔐 App Review

For Meta App Review, Synalux exposes admin endpoints to fire test calls per requested permission so the App Review counter increments:

POST /api/v1/messenger/admin/test-send                 Fire a test message (CRON_SECRET-gated)
POST /api/v1/messenger/admin/test-all-permissions      One Graph API call per requested permission

This is what gets you through Meta App Review’s “exercise the API” requirement without scripting it manually.

🏗️ Architecture

POST /api/v1/messenger/webhook        Meta webhook (signature-validated)
POST /api/v1/messenger/send            Outbound message (appsecret_proof on every call)
POST /api/v1/messenger/admin/test-*    App Review counter exercises

💳 Plans

Available on Standard+.