n8n + Nextmail
An inboxfor n8n.
Agents built with n8n read, reply and send from the addresses you approve. They load the Nextmail tools over MCP, with a sign-in you give once.
https://api.nextmail.sh/mcpIn n8n, paste it as the endpoint of an MCP Client Tool, keep HTTP Streamable and choose MCP OAuth2 to sign in.
Three steps.
Then it works on its own.
- 01
Add the MCP Client Tool
Attach it to your AI Agent node, paste the address as its endpoint and keep HTTP Streamable.
- 02
Sign in with MCP OAuth2
Create an MCP OAuth2 credential with the same address as its server URL. n8n registers itself and opens Nextmail for you to approve.
- 03
Pick the tools
Under Tools to Include, choose Selected and keep the ones the workflow needs.
Tasks for your n8n agent.
In plain words.
Each prompt shows the tools it is likely to call.
Summarise my unread mail at [email protected] and draft replies. Don't send them yet.
- listThreads
- getThread
- createDraft
Answer Ada's refund question in her thread, then file it under refunds.
- getThread
- replyToEmail
- modifyLabels
Find the invoice Jonas sent last month and sum up the thread.
- listThreads
- getThreadSummary
Add Noor Haddad to my contacts and to the Beta audience.
- createContact
- addContactToAudience
You approve it.
Like any other app.
When the client signs in, you pick the workspace, what it may do, which addresses it reaches and for how long. Account → Connected apps changes or removes it later.
- Your role is the ceiling
- An app never holds a permission you lack, and when your role loses one, the app loses it on its next call.
- Some things are never granted
- No app can create or rotate API keys, open billing or manage the workspace, whatever you tick.
- Risky changes wait for you
- Adding a webhook, writing a rule, changing roles or removing a domain needs your verification code, or a 60-minute allowance you switch on for that app.
Asked first.
Answered plainly.
More frameworks and tools.
Same server, your stack.
Give it an address.
Watch it work.
MCP, the API and the command line come with every plan, the free one included. Connect a client and approve exactly what it reaches.
claude mcp add --transport http nextmail https://api.nextmail.sh/mcp
Google Workspace