Publisher MCP server

Tools: 19

Ratum Mail

Ratum Mail is SMTP infrastructure for AI agents: mail lands in a database you own and is read over MCP or REST, including a blocking wait for the message that has not arrived yet.

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https://ratummail.com/

MCP

MCPBundles

Remote MCP URL

https://api.ratummail.com/mcp

This server may ask you to sign in when your AI client connects.

Last probed Nov 3, 2026 · api.ratummail.com

19tools discovered

For AI agents — MCPBundles Directory API
For MCP client apps (human connect):
MCP connect URL: https://api.ratummail.com/mcp
Skill page: https://www.mcpbundles.com/skills/ratummail-mcp-d4e1fae4ad

Explore capabilities (19)

write 11

Mail

Mail Whoami

read

mail_whoami

Which account this key is bound to, its sending domain, credits, and the inbox ids mail_send needs. Call this first.

Add to workspace

Tool inventory (19 tools)

Mail Whoami — Which account this key is bound to, its sending domain, credits, and the inbox ids mail_send needs. Call this first.
Mail Inboxes — List the inboxes this key can use, with their ids.
Mail Search — List or search messages, newest first. `q` matches subject, sender and body. Filter with to=, after=, direction. Returns ids for mail_read and mail_reply.
Mail Read — Read one message in full: body (HTML converted to text when there is no plain part), auth verdicts, and any attachments.
Mail Attachment — Download one attachment by message id and attachment id (from mail_read). Returns base64.
Mail Wait — Block until a matching message arrives, then return it. Use after triggering a signup or password reset instead of polling mail_search.
Mail Deleted — List messages that were deleted but are still recoverable, with days left before purge.
Mail Folders — List folders and how many messages each holds. Folders are how work is claimed on a shared inbox.
Mail Create Folder — Create a folder (or return the existing one of that name). Use one folder per agent to claim work from a shared inbox.
Mail Move — Move a message into a folder. This is how you CLAIM work on a shared inbox: by default it only succeeds while the message is still unfiled, so if another agent claimed it first you get told rather than both of you working the same message. Claim first, then do the work.
Mail Send — Send an email. Needs inbox_id (from mail_whoami), recipients, subject, and text and/or html. Costs one credit. Content is not screened — send only what was asked for.

Get your MCP into directories

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Frequently Asked Questions

What is the Ratum Mail MCP server?

Ratum Mail is SMTP infrastructure for AI agents: mail lands in a database you own and is read over MCP or REST, including a blocking wait for the message that has not arrived yet.

How do I connect Ratum Mail to my AI agent?

Use the MCP endpoint listed on this page in your MCP client configuration. One-click install pills support Claude, Cursor, VS Code, and other hosts. Copy the remote MCP URL if your client needs a manual entry.

How many tools does Ratum Mail provide?

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Mail Reply — Reply to a message by id. Recipient, subject and threading come from the original.

Mail Delete — Delete ONE message (soft delete, recoverable 30 days). For more than a handful, use mail_delete_many instead — it takes up to 500 ids in a single call and avoids the rate limit.

Mail Delete Many — Delete up to 500 messages in ONE call. Use this instead of calling mail_delete repeatedly — per-message deletion burns the rate limit and is roughly 100x slower over a large mailbox. Soft delete: everything stays recoverable for 30 days.

Mail Restore Many — Restore up to 500 deleted messages in one call.

Mail Move Many — Claim up to 500 messages into a folder in one call. Only messages still unfiled move, so two agents cannot claim the same batch.

Mail Restore — Restore a previously deleted message.

Mail Create Inbox — Create a new inbox on this account's domain, e.g. local_part 'invoice-bot'. Returns its id for sending.

Mail Delete Inbox — Remove an inbox. Refuses while it still holds mail unless force is set — that destroys those messages permanently and is NOT recoverable.

Schemas and invoke metadata: Directory API

MCPBundles probed 19 tools on the live server. The tool list on this page reflects what was discovered at the last refresh — connect your client to see the full set available to your session.

What authentication does Ratum Mail require?

Ratum Mail may require signing in to the provider before tools can run. Connect through MCPBundles or your MCP client and complete any provider login when prompted.

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