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Fastmail

Mail, contacts, and calendars over JMAP.

Connect FastmailAll toolkits
Auth: API keyCatalog preview
Tools

What your agent can do with Fastmail

FASTMAIL_SEARCH

Search across Fastmail records and content.

FASTMAIL_CREATE

Create a new item in Fastmail with validated fields.

FASTMAIL_UPDATE

Update an existing Fastmail item by id.

FASTMAIL_LIST

List and filter Fastmail items with pagination.

Setup
Option A — MCP (no code)
  1. Sign up and connect Fastmail from your dashboard.
  2. Copy your gateway URL: mcp.conduit.dev/you
  3. Paste it into Claude, Cursor, or any MCP client.
Option B — API
curl -X POST https://api.conduit.dev/v1/tools/execute \
  -H "Authorization: Bearer $API_KEY" \
  -d '{
    "tool_slug": "FASTMAIL_CREATE",
    "external_user_id": "user_123",
    "arguments": { ... }
  }'

Put Fastmail to work

Get started for free
See use cases →