Changelog

Every change to the public API, newest first. Within v1 changes are only ever additive: see Versioning & changes for what that promises.

2026-10-05#

Documentation: the reference is now one page per resource, every endpoint a section on it with its code beside it. Old endpoint links (/docs/reference/sendMessage) still work and land on the endpoint.

Webhook endpoints: subscribing to an event family needs the matching read scope (message.* needs messages:read, and so on); * needs all of them. A missing one answers insufficient_scope.
Flows: contact_id, contact_phone, phone, phone_number, customer and keys starting with _ are reserved and refused in variables. A run is always for the contact you name.
Media: DELETE /v1/media/{id} needs a live key.
Authentication: repeated failed keys from one address are slowed down with rate_limited. A valid key is never affected.

v1 released. Messages of every type (text, template, media, location, contacts, interactive, reaction), Instagram and Messenger replies, read receipts; numbers, templates (read, create, delete), media, contacts, tags and custom fields, conversations and members, campaigns, flows and flow runs, usage.
Test mode with simulated delivery, webhooks v2 with Standard Webhooks signatures, idempotency keys, request logs.