MailFlat — MCP server
Native Model Context Protocol server for
MailFlat. Gives Claude Desktop, Cursor, or any MCP client
real inbox tooling: create inboxes, wait for OTP codes, send DKIM-signed mail, and
clean up when the task is done. Each address is permanent and stays until you delete it;
only the messages inside expire, on a retention window you choose. Built on the mailflat Python SDK.
Run
# zero-install, isolated (recommended)
MAILFLAT_API_KEY=mf_live_… uvx mailflat-mcp
# or install it
pipx install mailflat-mcp
MAILFLAT_API_KEY=mf_live_… mailflat-mcp
Claude Desktop / Cursor config
Add to claude_desktop_config.json (or your client's MCP config):
{
"mcpServers": {
"mailflat": {
"command": "uvx",
"args": ["mailflat-mcp"],
"env": { "MAILFLAT_API_KEY": "mf_live_..." }
}
}
}
Get your API key from the MailFlat dashboard → Agents.
Tools (19)
| Tool | What it does |
|---|---|
create_inbox(prefix?, label?, retention_hours?) |
Open an inbox; retention_hours capped by your plan |
list_inboxes() |
All inboxes this key can see |
read_messages(address, direction="in") |
Read messages; received mail by default (out / all for the rest) |
wait_for_otp(address, timeout=30) |
Poll until an OTP arrives, then return it |
wait_for_message(address, timeout=30) |
Poll until a new message arrives; ignores mail you sent |
send_email(address, to, subject?, body?, html?) |
Send a DKIM-signed mail from the inbox |
reply(address, message_id, body?, html?) |
Answer a message in the same conversation (threading headers filled in) |
wait_until_sent(address, message_id, timeout=60) |
Did that mail actually go out? A timeout means still queued, not lost: do not send again |
mark_read(address, message_id) |
Mark one message read so later polls skip it |
burn_inbox(address) |
Delete every message but KEEP the address |
delete_inbox(address) |
Delete the inbox and its messages |
delete_message(address, message_id) |
Delete one message; the inbox itself stays |
list_calendar_events(address, include_cancelled=False) |
Meetings from calendar invitations the inbox received, with this inbox's answer (my_status) |
rsvp_to_invite(address, event_id, response, comment?) |
Accept, decline or tentatively accept; the organizer's calendar shows the answer |
create_calendar_event(address, title, start, attendees, ...) |
Schedule a meeting from the inbox and email the invitations (Yes / No / Maybe in the attendees' calendars) |
update_calendar_event(address, event_id, ...) |
Move or edit a meeting the inbox organized; the same event updates in every calendar |
cancel_calendar_event(address, event_id, message?) |
Cancel a meeting the inbox organized |
get_calendar_feed(address) |
Read-only subscribe link for the inbox's calendar, to hand to a person (Google, Apple, Outlook). The same link on every call |
rotate_calendar_feed(address) |
Replace the subscribe link; the old one stops working at once |
Reads return received mail by default. Without that, sending to a peer and then waiting for the reply would immediately match your own outgoing message.
Configuration
MAILFLAT_API_KEY— your account API key (required).MAILFLAT_API_URL— override the API base (defaulthttps://mailflat.net; for self-hosted / BYOD).
Registry
mcp-name: io.github.MailFlat/mailflat-mcp
This line is the ownership marker the official MCP Registry looks for in a PyPI package's
README. It proves the same owner controls both the GitHub namespace and the published
package, so the registry entry cannot be claimed by someone else. Keep it in sync with the
name field in server.json; a test asserts the two match.
License
MIT
1 maintainer
Metadata
1 maintainer
Release files for mailflat-mcp 0.12.0
For a detailed explanation of source distributions (sdists) and built distributions (wheels), please see the package formats documentation.
Source distribution (sdist)
| File | Size | Uploaded | |
|---|---|---|---|
| mailflat_mcp-0.12.0.tar.gz | 12.3 kB | Details |
Built distribution (wheel)
| File | Interpreter | ABI | Platform | Reset |
|---|---|---|---|---|
| mailflat_mcp-0.12.0-py3-none-any.whl | Python 3 | none | any | Details |
Total release size: 25.9 kB
Release files / mailflat_mcp-0.12.0.tar.gz
| Download URL | mailflat_mcp-0.12.0.tar.gz |
|---|---|
| Size | 12.3 kB |
| Tags | Source |
|
SHA-256 checksum How to use checksums |
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|
|
BLAKE2b-256 checksum How to use checksums |
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|
| Upload date | |
|
Uploaded using Trusted Publishing? What is trusted publishing? |
No |
| Uploaded via |
twine/7.0.0 CPython/3.11.9
|
Release files / mailflat_mcp-0.12.0-py3-none-any.whl
| Download URL | mailflat_mcp-0.12.0-py3-none-any.whl |
|---|---|
| Size | 13.6 kB |
| Tags | Python 3 |
|
SHA-256 checksum How to use checksums |
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|
|
BLAKE2b-256 checksum How to use checksums |
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|
| Upload date | |
|
Uploaded using Trusted Publishing? What is trusted publishing? |
No |
| Uploaded via |
twine/7.0.0 CPython/3.11.9
|
