# Connect DeepSeek to LotsMail

Canonical page: https://lotsmail.to/agents/deepseek
Steps checked: 2026-10-01

Ask DeepSeek to read, search and draft replies in your LotsMail business inbox. Add LotsMail to DeepSeek as a remote MCP server with an API key.

MCP server URL: https://api.lotsmail.to/mcp
REST API docs: https://api.lotsmail.to/docs
Setup instructions for your agent: https://lotsmail.to/skill.md

## What you can do once connected

- Read and search your mailboxes: list conversations by folder, open a whole conversation and find messages by person, subject or text.
- Write drafts and reply drafts that wait in Drafts for you to review and send.
- Send, reply and send a draft, once you have turned sending on for that mailbox, and check whether each message was delivered.
- Mark messages read or unread, star them and move them between inbox, archive, trash and spam.
- Start domain setup and show how your domains are paid for. Domains, DNS, team access and agent permissions stay yours, in the dashboard.

The LotsMail dashboard does the whole job too: a full inbox on every device, plus domains, mailboxes, team and agent permissions. Your agent for speed, the dashboard for control.

## You need

- DeepSeek Harness with the dsh-mcp-client package in your profile
- A LotsMail API key supplied through the LOTSMAIL_API_KEY environment variable
- A LotsMail account. You can create one during sign-in.

## Connect DeepSeek to LotsMail

1. **Register a remote MCP entry.** Add this entry to your DeepSeek Harness profile using its documented dsh-mcp-client configuration. Use the HTTP configuration below.

```
- id: mcp-lots-mail
  name: '@deepseek-ai/dsh-mcp-client'
  config:
    serverName: lots-mail
    transport: streamable-http
    url: https://api.lotsmail.to/mcp
    headers:
      Authorization: !!js '`Bearer ${process.env.LOTSMAIL_API_KEY}`'
```

2. **Supply the key and restart the harness.** Create a key at https://www.lotstech.com/api and store it securely in the runtime environment. After startup, tools appear under mcp__lots-mail__. Confirm discovery with a read-only request before changing anything.

## What to ask next

- “What came in for sales@ today? Summarise anything that needs a reply.”
- “Draft a reply to the latest message from the supplier and leave it for me to check.”
- “Find last month’s invoice from our supplier and tell me the amount and due date.”
- “Check whether my last email to Acme was delivered.”

## Questions and troubleshooting

### How do I connect DeepSeek to LotsMail?

Follow the DeepSeek setup above to add https://api.lotsmail.to/mcp. Configure your LotsMail API key using the credential settings shown. Then ask “List my LotsMail mailboxes”.

### Does the DeepSeek chat app connect to LotsMail?

This guide covers DeepSeek Harness and its Streamable HTTP MCP client, not the DeepSeek consumer chat. Follow the steps above with a LotsMail API key.

### Do I need an API key to use LotsMail with DeepSeek?

Yes. Create one at https://www.lotstech.com/api and keep it out of chats, logs and committed files. Where DeepSeek offers sign-in, use that instead.

### What does LotsMail cost?

Current plans and prices are on https://lotsmail.to/pricing. Your agent’s own plan or usage fees are separate.

### Can my agent send email without me?

Only if you turn on sending for that mailbox. Sending is off until you do. With read or draft access your agent can search, read and write drafts that wait in Drafts for you to review and send.

### Which mailboxes can my agent open?

Only the mailboxes you can open yourself. For each one you choose what agents may do: read and search, write drafts, or send. Owners do not get private mailboxes by default.

### Can I limit who my agent emails?

Yes. A mailbox can be restricted to a list of addresses it may send to, and any other recipient refuses the whole send. Only a workspace owner or admin changes restrictions, in the dashboard.

### Can my agent change my domain or DNS?

No. It can start domain setup, which gives you the steps and the dashboard link. Domains, DNS, billing, team access and agent permissions stay with you, in the dashboard.

### LotsMail tools are not available

Check that LotsMail is enabled for this session and authentication has completed. Reload the connection or start a new session to refresh its tools.

## Sources

- [DeepSeek Harness: official MCP client](https://github.com/deepseek-ai/deepseek-harness/blob/master/packages/mcp/mcp-client/README.md)