An inbox for your next workflow.

Start with the API

Create a key in the console. Store it in TMPKIT_API_KEY, then create a mailbox. Reuse an idempotency key when retrying the same creation.

# Create one mailbox; repeat with the same key on retry.
curl 'https://tmpkit.com/api/v1/mailboxes' \
  -H "Authorization: Bearer $TMPKIT_API_KEY" \
  -H 'Content-Type: application/json' \
  -H 'Idempotency-Key: my-first-inbox' \
  -d '{"label":"Signup test"}'

Send from your own test system, then list messages or wait up to 20 seconds. A timeout is a normal result, not a failed delivery claim.

Connect with MCP

Use this URL in a client supporting Streamable HTTP and OAuth. Review permissions before connecting.

https://tmpkit.com/mcp

Codex CLI

codex mcp add tmpkit --url https://tmpkit.com/mcp
codex mcp login tmpkit
codex mcp list

Use a different name if tmpkit is already configured for another server. Open a new client session, then call get_capabilities and get_usage to check the connection without consuming tool allowance.

Local stdio option: download the bundle and follow tmpkit-mcp/README.md. Run npm install --omit=dev in that directory, then configure your client to run node /absolute/path/tmpkit-mcp/index.mjs with TMPKIT_API_KEY in its environment. Requires Node.js 20+. The package is distributed as a download.

Skill installation

Copy the extracted tmpkit folder to your client's skills directory; for Codex, use ~/.agents/skills/tmpkit/. It guides email verification, diagnostics and local utilities. The helper needs Python 3.10+. Credentials stay in the environment.