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io.github.heocoi/mailsink

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Disposable inboxes for AI agents and CI: catch the verification email, read the OTP or link.

Code source Documentation

Installation

Ajoutez ceci à la configuration MCP de votre client (Claude Desktop : claude_desktop_config.json ; Cursor : .cursor/mcp.json ; VS Code et les autres utilisent la même forme « mcpServers »).

NPM package @mailsink/mcp
Claude Code 
claude mcp add mailsink -e 'MAILSINK_API_KEY=<your mailsink_api_key>' -e 'MAILSINK_API_URL=<MAILSINK_API_URL>' -- npx -y @mailsink/mcp@0.1.5
Configuration JSON (Claude Desktop, Cursor, VS Code) 
{
    "mcpServers": {
        "mailsink": {
            "command": "npx",
            "args": [
                "-y",
                "@mailsink/mcp@0.1.5"
            ],
            "env": {
                "MAILSINK_API_KEY": "<your mailsink_api_key>",
                "MAILSINK_API_URL": "<MAILSINK_API_URL>"
            }
        }
    }
}

Variables d'environnement

  • MAILSINK_API_KEY obligatoire secret Your MailSink API key. Get it at https://mailsink.dev/auth/github
  • MAILSINK_API_URL Optional API base URL override (defaults to https://api.mailsink.dev)

Documentation

Tirée du README du projet sur GitHub, actualisée chaque semaine. Les liens ouvrent GitHub.

Sommaire
  1. @mailsink/mcp
  2. Install
  3. Get an API key
  4. Configure your client
  5. Tools
  6. Example agent flow
  7. Environment variables
  8. Source
  9. License

@mailsink/mcp

Model Context Protocol server for MailSink — programmatic temporary email inboxes for AI agents and test automation.

Gives your agent eight typed tools for provisioning disposable addresses, waiting on signup emails, extracting OTP codes and magic links, and cleaning up after itself. Works in Claude Code, Claude Desktop, Cursor, Windsurf, and any other MCP-aware client.

Install

npm install -g @mailsink/mcp

Or run via npx without installing:

npx @mailsink/mcp

Get an API key

  1. Sign in at https://mailsink.dev/app with GitHub.
  2. Copy the key from the one-time reveal. Store it in your password manager or .env.
  3. Export it so the MCP server can read it:
     export MAILSINK_API_KEY="msk_..."

Free tier is 50 inboxes/month and includes MCP. Pro ($15/mo) and Team ($49/mo) lift the inbox cap, raise email size limits, extend TTL, and bump request rates. See pricing.

Configure your client

Claude Code
claude mcp add mailsink -- npx -y @mailsink/mcp
Claude Desktop / Cursor / Windsurf

Add to the mcpServers section of the client's config file:

{
  "mcpServers": {
    "mailsink": {
      "command": "npx",
      "args": ["-y", "@mailsink/mcp"],
      "env": {
        "MAILSINK_API_KEY": "msk_..."
      }
    }
  }
}

Restart the client. You should see the mailsink server listed with its eight tools.

Tools

ToolPurpose
create_inboxProvision a throwaway address. Returns email, id, expires_at.
list_inboxesList active inboxes on the account.
wait_for_emailBlock up to timeout seconds (max 120) for any email to arrive.
get_verification_codeExtract the most recent OTP from the inbox (polls until found or timeout).
get_verification_linkExtract the most recent magic link.
list_messagesSummaries of all messages in an inbox.
get_messageFull content of a specific message by ID.
delete_inboxBurn an inbox immediately.

Example agent flow

> Sign me up for Figma, capture the verification code, confirm, and
> tell me the plan once you're in.

[agent invokes]
  create_inbox()                                → agent@codenotify.net
  [agent fills the Figma signup form with that address]
  wait_for_email(inbox_id)                      → blocks 30s…
                                                → returns email + OTP
  [agent types the OTP into the Figma form]
  delete_inbox(inbox_id)                        → cleanup

No webhook plumbing. No IMAP credentials. No parsing MIME.

Environment variables

  • MAILSINK_API_KEY (required) — your account's API key.
  • MAILSINK_API_URL (optional, default https://api.mailsink.dev) — override for self-hosted or dev API.

Source

https://github.com/heocoi/mailsink/tree/main/mcp

License

MIT — see LICENSE.

Questions fréquentes

Qu'est-ce que io.github.heocoi/mailsink ?

Disposable inboxes for AI agents and CI: catch the verification email, read the OTP or link.

Comment installer io.github.heocoi/mailsink ?

Il s'exécute sur votre machine. Dans Claude Code : claude mcp add mailsink -e 'MAILSINK_API_KEY=<your mailsink_api_key>' -e 'MAILSINK_API_URL=<MAILSINK_API_URL>' -- npx -y @mailsink/mcp@0.1.5. Pour les autres clients, collez la configuration JSON de cette page dans leurs réglages MCP.

Faut-il une clé API pour io.github.heocoi/mailsink ?

Oui. Il attend MAILSINK_API_KEY, à renseigner dans sa configuration.

io.github.heocoi/mailsink est-il open source ?

Oui. Son code est sur GitHub sous licence MIT.

Qui maintient io.github.heocoi/mailsink ?

Il est publié par heocoi. AI.tn le référence sans le maintenir ni le recommander.

Issu du registre MCP officiel. Être listé n'est pas une recommandation : vérifiez le code et les permissions d'un serveur avant de lui donner accès à vos données.