Changelog

Backward-compatible changes (new fields, new filters, new events) are published here without prior notice. Deprecations are announced 6 months in advance.

2026-10-14

• Developer Hub published, with the reference generated from the API's actual definition, guides for getting started, authentication, limits, errors, pagination, webhooks and recipes. Downloadable OpenAPI and Postman collection.

2026-09-26

• API keys with scopes (contacts, campaigns, conversations, automations, reports) and optional expiry.
• Outbound webhooks with X-WM-Signature signature, retries and automatic pausing. Active events: contact.created, contact.updated, contact.stage_changed, campaign.finished.

Upcoming

• messages:send: send messages in open conversations.
• conversations:write: assign, close and reopen conversations.
• templates:read: list templates and their approval status.
• Contact lookup by exact phone or email; custom fields in the API.
• X-RateLimit-* and Idempotency-Key headers.
• wm_test_… test keys against a test organization.