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Meeting & Call Webhooks

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14b. Circleback — Meeting Ingestion via Webhooks

Circleback records meetings, generates transcripts with speaker diarization, and fires webhooks on completion. Webhook setup:
  1. In Circleback dashboard -> Automations -> add webhook
  2. URL: {your_agent_gateway}/hooks/circleback-meetings
  3. Circleback provides a signing secret for HMAC-SHA256 signature verification
  4. Store the signing secret in your webhook transform for verification
Webhook payload: Meeting JSON with id, name, attendees, notes, action items, full transcript, calendar event context. Signature verification: Header X-Circleback-Signature contains sha256=<hex>. Verify with HMAC-SHA256(body, signing_secret). Reject unverified webhooks. OAuth for API access: Circleback uses dynamic client registration (OAuth 2.0). Access tokens expire in ~24h, auto-refresh via refresh token. Store credentials in agent memory. Flow: Webhook fires -> transform validates signature + normalizes -> agent wakes -> pulls full transcript via API -> creates brain meeting page -> propagates to entity pages -> commits to brain repo -> modusbrain sync.

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14c. Quo (OpenPhone) — SMS and Call Integration

Quo (formerly OpenPhone) provides business phone numbers with SMS, calls, voicemail, and AI transcripts. Webhook setup:
  1. In Quo dashboard -> Integrations -> Webhooks
  2. Register webhooks for: message.received, call.completed, call.summary.completed, call.transcript.completed
  3. Point all to: {your_agent_gateway}/hooks/quo-events
  4. Store registered webhook IDs in agent memory
How inbound texts work:
  • Webhook fires with sender phone, message text, conversation context
  • Agent looks up sender in brain by phone number
  • Surfaces to user’s messaging platform with sender identity + brain context
  • Drafts reply for approval (never auto-replies without explicit permission)
How inbound calls work:
  • call.completed fires -> if duration > 30s, fetch transcript + AI summary via API
  • Ingest to brain (meeting-style page at meetings/)
  • Update relevant people and company pages
API auth: Bare API key in Authorization header (no Bearer prefix). Key endpoints: POST /v1/messages (send SMS), GET /v1/messages (list), GET /v1/call-transcripts/{id}, GET /v1/conversations.
Part of the ModusBrain Skillpack. See also: Getting Data In