Replyz / MCP server
An email MCP server that gives your agent its own inbox.
Most email MCP servers connect your agent to your Gmail or Outlook. Replyz gives the agent an inbox of its own, so it can sign up for services, read verification codes and reply, without access to your personal mail.
How do you connect it?
Remote MCP endpoint, Streamable HTTP, authenticated with your API key:
https://mcp.replyz.io/mcp Authorization: Bearer $REPLYZ_API_KEY
Claude Code
claude mcp add --transport http replyz https://mcp.replyz.io/mcp \ --header "Authorization: Bearer $REPLYZ_API_KEY"
Or let the CLI set it up
npx -y @replyz/cli mcp install
Which tools does it have?
create_inbox, list_inboxes
A new address for each agent or task.
wait_for_email
Waits up to 45 s for a matching email, by sender, subject or time, then returns it.
get_verification
Returns the code or link from the latest matching email, even if it arrived before the call.
list_messages, read_message
Read the inbox. Email content is always marked as untrusted.
email_my_human
The agent writes to you, its human, for approval or to report back.
account_status
Limits, usage and whether the account is claimed.
What does a session look like?
you Sign up for the service and tell me when it's done. agent create_inbox → signups-4f2a@youreplyz.com agent get_verification(from: "*@service.example") ✓ code: 482913
Why not use a Gmail MCP server?
- Scope. A Gmail MCP server hands the agent your whole inbox. With Replyz it only sees mail sent to its own address.
- No Google OAuth app. Nothing to approve on your Google account, and nothing to revoke later.
- Built for agents. Waiting for an email and pulling out a code are single tool calls.
- EU-hosted. Mail is stored in the European Union.
Frequently asked questions
What is an email MCP server?
An MCP server that gives an AI agent email tools. Most connect the agent to your Gmail or Outlook. Replyz gives the agent an inbox of its own instead.
How do I connect the Replyz MCP server?
Point your MCP client at https://mcp.replyz.io/mcp over Streamable HTTP and send your API key as a Bearer token. The Replyz CLI can also do it for you with replyz mcp install.
Which tools does the Replyz MCP server have?
create_inbox, list_inboxes, list_messages, read_message, wait_for_email, get_verification, email_my_human and account_status.
How long does wait_for_email wait?
Up to 45 seconds per call. If nothing arrives it returns a timeout and the agent simply calls it again.
Is email content safe to give to the model?
Every tool marks email content as untrusted, so the agent treats instructions inside an email as data, not as commands.
Should I use the MCP server or the CLI?
Use the CLI or the skill for agents that run on your machine (Claude Code, OpenClaw, Hermes): it is faster and keeps the API key out of the model's context. Use the MCP server for remote agents such as Claude on the web. ChatGPT needs OAuth, which Replyz plans to add after launch.