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@mailworker/cli

v0.1.0

Published

Programmatic inboxes that send and receive real email. The agent-facing surface: human and machine readable at once.

Vulnerabilities

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  • 0Medium
  • 0Low

Links

Git

Maintainers

guangzhengliguangzhengli

Keywords

emailemail-testinginboxotpagentai-agentclicloudflaree2e-testing

Readme

@mailworker/cli

Programmatic inboxes that send and receive real email, aimed at agents and test automation rather than at humans reading mail. Installs one command, mailworker.

npx @mailworker/cli@latest help --agent

This CLI talks to your own Mailworker deployment on Cloudflare. It is not a hosted service: point it at a deployment you control with MAILWORKER_URL and MAILWORKER_TOKEN.

Why a CLI and not an MCP server

There is no MCP server by design; agents drive Mailworker through this CLI and the REST API. That raises the bar on its design, since it has to work for humans and machines at once:

  • --json on everything, with a schema kept stable within a major version
  • zero interaction when stdin is not a TTY — never block waiting for input
  • one command completes one whole intent (wait --extract otp prints the code itself, not a message to parse)
  • exit codes carry meaning, so a script or agent can branch without reading text

| Code | Meaning | |---|---| | 0 | success | | 1 | generic error | | 2 | usage error | | 3 | authentication failed | | 4 | wait timed out | | 5 | rejected by policy — quota, allowlist, loop breaker or suppression | | 6 | quota or rate limit |

mailworker help --agent prints the whole surface in one page, which is what an agent should read instead of this file.

Configuration

export MAILWORKER_URL=https://mailworker.your-worker.dev
export MAILWORKER_TOKEN=mw_live_…

Both may also come from .mailworker/config.json, project directory first then home. Prefer the environment: a token in argv is visible in ps and in shell history.

The shape of a test

id=$(mailworker inbox create --prefix signup --json | jq -r .id)
# … drive your signup flow against the printed address …
CODE=$(mailworker wait --inbox "$id" --extract otp --timeout 60s) || exit $?

get --raw > fixture.eml into inject fixture.eml is the loop that turns a strange production message into a regression test.

Using it from a coding agent

npx skills add guangzhengli/mailworker

Installs the mailworker skill into Claude Code, Codex, Cursor and other skills-compatible agents.

License

MIT