DEVELOPER PLATFORM

Cold email infrastructure your agent can use.

Control campaigns, mailboxes, replies, and results through a clean REST API, CLI, MCP server, and signed webhooks.

See API docsInstall the CLI
  • REST API
  • MCP
  • CLI
  • Webhooks
The Sendsets moth working from a laptop

WHAT YOU GET

Everything needed. Nothing in the way.

One API

Create campaigns, connect mailboxes, manage replies, and read results from one surface.

Built for agents

Claude Code and Codex can install the skill, sign in, and work through the CLI or MCP.

Safe retries

Idempotency keys, stable errors, scoped keys, and audit logs keep automation predictable.

Realtime events

Subscribe over WebSocket or receive signed webhooks when campaign state changes.

HOW IT WORKS

From setup to results.

  1. 01

    Create a key

    Choose only the permissions your workflow needs.

  2. 02

    Call the API

    Use REST, CLI, MCP, or the language of your choice.

  3. 03

    Subscribe

    Receive replies, sends, opens, clicks, and audit events live.

READY WHEN YOU ARE

Send better outreach from the tools you already use.

Start freeSee pricing
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