Changelog

Each entry gives the date, the type and what changed. The API has one version, v1.

2026-09-04#

Added. Rate limit headers X-RateLimit-Limit, X-RateLimit-Remaining and X-RateLimit-Reset on every authenticated response. See Rate limits. No action needed.

Added. Idempotency-Key on POST /prospects, POST /suppressions and POST /hooks. See Idempotency keys. Requests without the header behave as before.

Added. Five write endpoints: POST /campaigns/{id}/prospects, POST /campaigns/{id}/pause, POST /campaigns/{id}/resume, PATCH /replies/{id} and DELETE /suppressions/{id}. See Campaigns, Replies and Suppressions.

Added. Thirteen GET endpoints for prospects, campaigns, companies, replies, offers, suppressions, hooks and mailboxes.

Added. The MCP server at /api/mcp, with one tool for each endpoint.

2026-09-03#

Changed. The last segment of an email domain must start with a letter. An address that does not meet this rule returns invalid-email.

2026-08-29#

Added. company_name on prospects.

Added. The campaign query parameter on POST /prospects, which enrols the new prospect in a campaign.

Added. POST /suppressions, POST /hooks and DELETE /hooks/{id}.

2026-08-23#

Added. The clicked event in the workspace webhook.

2026-08-22#

Added. POST /prospects and PATCH /prospects/{id}, workspace API tokens, a rate limit of 60 requests per minute and the workspace webhook.