D Line API
REST and webhooks for calls, texts, voicemail and your workspace.
Changelog
Within v1 we only add: new endpoints, fields, event types and enum values. Breaking changes go to a new major version with at least 12 months of overlap. Every webhook carries an api_version date.
2026-10-11: API is live
- v1 is live at https://api.d-line.app/v1. Contract version 1.0.0.
- Workspace admins create API keys and webhook endpoints in Settings → Developers. Requests and webhook deliveries need a paid plan.
2026-10-11: Preview contract published
- First design-first draft of v1: workspace, phone numbers, users, extensions, messages, media, conversations, opt-outs, calls (recording, transcript, summary), voicemail, webhook endpoints, deliveries, events and the event catalog.
- Webhooks follow Standard Webhooks (webhook-id, webhook-timestamp, webhook-signature). Payload api_version 2026-11-01.
- Published as a preview ahead of the launch.