MinuteMail
Disposable email infrastructure for AI agents and end-to-end tests.
What it can do
- Mailboxes.List: List the tenant's active mailboxes (owner is derived from the API key). Optionally look up a single mailbox by exact address.
- Mailboxes.Create: Create a new temporary mailbox. The domain defaults to the tenant's default domain; the owner is always the API key's owner.
- Mailboxes.Get: Fetch a single mailbox by ID.
What data it sees
Do you need an account
No: the server works without sign-in
Disposable email infrastructure for AI agents and end-to-end tests.
MinuteMail gives your agent 39 tools for testing anything that touches email or OAuth: ephemeral mailboxes, inbound mail simulation, attachments, custom domains, team management, and a mock OAuth IdP.
Test signup flows, email verification, password resets, and OAuth logins — without real inboxes or real identity providers. Create a mailbox, trigger your flow, read the mail, extract the code, done. Everything expires automatically, so CI runs start clean.
Requires a free MinuteMail API key — create one at minutemail.co. The MCP server is a stateless proxy: it holds no credentials or local data of its own — your key is forwarded to the MinuteMail API, and all state (mailboxes, mails, identities) lives there.
How to connect
How to connect MinuteMail to Claude
The server address to paste into Claude settings:
https://minutemail--minutemailco.run.tools
- Open Claude (claude.ai or the desktop app).
- Go to Settings → Connectors.
- Click Add custom connector.
- Paste the server address copied below into Remote MCP server URL and click Add.
- In a chat, click + → Connectors and switch the new connector on.
Custom connectors are available on Free, Pro, Max, Team and Enterprise plans (Free is limited to one). On Team and Enterprise an organization Owner adds the connector first under Organization settings → Connectors.
Authorization
After you click Add, a sign-in window for the service opens. Sign in with your own account and approve access. Claude never sees your password.
How to connect MinuteMail to ChatGPT
The server address to paste into ChatGPT settings:
https://minutemail--minutemailco.run.tools
- Open ChatGPT in a browser (chatgpt.com). A Plus, Pro, Business, Enterprise or Edu plan is required.
- Turn on developer mode once: Settings → Apps → Advanced settings → Developer mode.
- Open Settings → Connectors and click Create.
- Fill in the form: Name (anything), Description (one line about what the service does), MCP server URL (copy it below).
- Under Authentication choose OAuth if the service requires sign-in, otherwise None. Click Create.
- In a new chat open + → Apps/Connectors and enable the connector.
OpenAI has renamed this section before (Connectors → Apps/Plugins). If the label differs, search settings for "developer mode". On Business/Enterprise workspaces an admin must allow custom connectors first.
Authorization
On first use ChatGPT opens the service's sign-in window. Sign in and approve access.
How to connect MinuteMail to Cursor
The server address to paste into Cursor settings:
https://minutemail--minutemailco.run.tools
Fastest: click Open in Cursor below and confirm the prompt.
Manually:
- In Cursor open Settings → Cursor Settings → MCP and click Add new global MCP server.
- Paste the JSON copied below into
~/.cursor/mcp.json(per project:.cursor/mcp.jsonin the repo root). - Save the file. The server appears in the MCP list; authorize it there if asked.
Authorization
If the service needs sign-in, an authorize button appears next to the server in the MCP list.
Server tool list (39)
Raw names from tools/list. Only developers need these.
| mailboxes.list | List the tenant's active mailboxes (owner is derived from the API key). Optionally look up a single mailbox by exact address. |
| mailboxes.create | Create a new temporary mailbox. The domain defaults to the tenant's default domain; the owner is always the API key's owner. |
| mailboxes.get | Fetch a single mailbox by ID. |
| mailboxes.delete | Delete a mailbox and its contents by ID. |
| mailboxes.delete_bulk | Delete several mailboxes at once by ID. |
| mails.list | List the emails in a mailbox, newest first. |
| mails.inject | Inject a simulated inbound email into a mailbox (multipart upload). No external mail is sent; use this to simulate inbound mail for flow testing. |
| mails.get | Fetch a single email by ID, including body and attachment metadata. |
| mails.delete | Delete a single email. |
| mails.delete_bulk | Delete several emails of one mailbox at once. |
| attachments.list | List the attachments of an email (metadata only). |
| attachments.add | Attach a file to a test-injected email (base64 payload). |
| attachments.get | Download an attachment. The file contents are returned base64-encoded in the JSON "data" field. |
| attachments.delete | Delete a single attachment. |
| attachments.delete_bulk | Delete several attachments of one email at once. |
| archived.list | List the tenant's archived (expired but recoverable) mailboxes. |
| archived.get | Fetch a single archived mailbox by ID. |
| archived.delete | Permanently delete an archived mailbox. |
| archived.reactivate | Reactivate an archived mailbox back to active state. |
| domains.list | List the tenant's custom domains with their DNS verification status. |
| domains.register | Register a new custom domain. DNS records (TXT token + MX) must then be added before verification can succeed. |
| domains.verify | Trigger DNS verification (TXT + MX) of a registered domain. |
| domains.delete | Delete a registered custom domain. |
| team.members.list | List the tenant's team members. |
| team.members.add | Add a team member directly (no invitation flow). |
| team.members.get | Fetch a single team member by ID. |
| team.members.delete | Remove a team member. |
| team.invitations.create | Create a team invitation for an email address (SMTP invite is sent by the team service). |
| team.invitations.list | List the tenant's team invitations. |
| team.invitations.delete | Revoke a team invitation. |
| identities.list | List the tenant's mock identities, optionally filtered by OAuth client or mailbox address. |
| identities.create | Create a mock identity bound to a mailbox for OAuth flow testing. |
| identities.get | Fetch a single mock identity by ID. |
| identities.delete | Delete a mock identity. |
| oauth.clients.list | List the tenant's OAuth clients for mock identity testing. |
| oauth.clients.create | Register an OAuth client for mock identity flows. The plaintext clientSecret is returned once at creation. |
| oauth.clients.get | Fetch a single OAuth client by its public client ID. |
| oauth.clients.delete | Delete an OAuth client by its public client ID. |
| oauth.clients.rotate_secret | Rotate an OAuth client's secret. The new plaintext secret is returned once. |