Give your agent its own email address with graduated human oversight — from full approval to autonomous sending.
If you already use Multimail Dev MCP, the multimail dev mcp mcp server is the piece that lets your assistant work with it directly. Give your agent its own email address with graduated human oversight — from full approval to autonomous sending.
Your agent doesn't have email yet because nobody trusts it with email yet. MultiMail fixes that. A real email address with a trust ladder from read-only to fully autonomous, cryptographic identity on every message, and per-recipient sending controls.
Because this one is hosted, setup is mostly authentication — you point your client at the endpoint and approve access. Nothing runs on your machine, so there is no runtime to keep patched.
The toolset is worth reading before you wire it up, because it tells you what the integration is really for:
send_email — Send email as markdown. Supports attachments, idempotency_key, scheduled delivery via send_atcheck_inbox — List emails with filters: status, sender, subject, date range, direction, attachments, paginationread_email — Full email content. Trusted metadata and untrusted body returned as separate content blocksreply_email — Reply in-thread. Threading headers set automaticallyget_thread — All emails in a conversation thread with participants and metadatadownload_attachment — Download attachment as base64 with content typecancel_message — Cancel a pending or scheduled emailedit_scheduled_email — Edit scheduled email before it sendswait_for_email — Block until matching email arrives or timeout (max 120s)get_tags — Get all tags on an email. Persistent key-value agent memory across sessionsset_tags — Set tags on an email. Merges with existing tagsdelete_tag — Delete a specific tag key from an emailConfiguration is passed through the environment: MULTIMAIL_API_KEY, MULTIMAIL_MAILBOX_ID, MULTIMAIL_API_URL. Treat anything key-shaped as a real credential — scope it to the minimum the server needs, and rotate it if it ever lands in a shared config.
This sits in the team communication group, where several servers overlap in what they claim to do but differ sharply once you actually set them up. Multimail Dev MCP's toolset — send_email, check_inbox, read_email and 11 more — is a fair guide to whether it matches your workflow. It is maintained by multimail-dev; worth a glance at recent repository activity before you build anything load-bearing on it.
This entry was verified against Multimail Dev MCP's own documentation before publication; SyncDev keeps the directory reviewed rather than auto-generated.
| Tool | What it does |
|---|---|
| send_email | Send email as markdown. Supports attachments, idempotency_key, scheduled delivery via send_at. |
| check_inbox | List emails with filters: status, sender, subject, date range, direction, attachments, pagination. |
| read_email | Full email content. Trusted metadata and untrusted body returned as separate content blocks. |
| reply_email | Reply in-thread. Threading headers set automatically. |
| get_thread | All emails in a conversation thread with participants and metadata. |
| download_attachment | Download attachment as base64 with content type. |
| cancel_message | Cancel a pending or scheduled email. |
| edit_scheduled_email | Edit scheduled email before it sends. |
| wait_for_email | Block until matching email arrives or timeout (max 120s). |
| get_tags | Get all tags on an email. Persistent key-value agent memory across sessions. |
| set_tags | Set tags on an email. Merges with existing tags. |
| delete_tag | Delete a specific tag key from an email. |
| Oversight | The Oversight tool exposed by this server. |
| list_pending | Emails awaiting oversight decision (requires oversight scope). |
{
"mcpServers": {
"multimail": {
"type": "url",
"url": "https://mcp.multimail.dev/mcp"
}
}
}Configuration as documented by the project. Restart the client after saving.
| Variable | Description | Required |
|---|---|---|
| MULTIMAIL_API_KEY | Credential the server authenticates with. | Yes |
| MULTIMAIL_MAILBOX_ID | Configuration value read at startup. | Optional |
| MULTIMAIL_API_URL | Endpoint or connection string the server talks to. | Yes |
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