Prerequisites
- OpenMail account (free, no credit card)
- An API key from the console
Pick your agent
Each guide installs the integration, creates an inbox, and sends a first email.
MCP server
One hosted URL for Claude, Cursor, and any MCP client. No install.
OpenClaw
Install the plugin and enable your agent to send and read emails.
Hermes Agent
Plugin with guided setup. Three command lines and OpenMail is live.
Claude Code
Install the CLI and the
openmail skill. Also works for Cursor and Codex.
CLI
Every
openmail command, for agents and scripts that work from a shell.
API / SDK
Create inboxes and send email programmatically in any language.
Narrow the agent’s key
An account-wide key reaches every inbox. Give the agent a scoped key instead, so a compromised agent can reach nothing beyond its own inbox or pod. The OpenClaw and Hermes plugins narrow the key during setup; for the CLI and API paths, mint one yourself. See Agent keys.Next steps
Handle inbound email
Route replies to your agent over WebSockets or webhooks.
Email deliverability
Warm-up schedules and content best practices.
Threading
How threads work across inbound and outbound.
API reference
Every endpoint, for programmatic workflows.