MCP server for Nylas — read email, calendars, events and contacts, and send email or create events. Hosted by usefulapi — connect from Claude, Cursor, or any MCP client.
Team and Enterprise: an Owner adds the connector for the organization first.
Run this command, then run /mcp in Claude Code to log in:
Add to Cursor or add this to ~/.cursor/mcp.json:
{
"mcpServers": {
"nylas": {
"url": "https://nylas.usefulapi.io/mcp"
}
}
}Add to VS Code or add this to .vscode/mcp.json:
{
"servers": {
"nylas": {
"type": "http",
"url": "https://nylas.usefulapi.io/mcp"
}
}
}Other MCP clients (Windsurf, Cline, Zed and more): add the URL as a remote MCP server (Streamable HTTP). The client then opens the login page in your browser. Do not add an Authorization header: see Before you connect.
The login page asks for your Nylas API key and Region.
Optional: Default grant id.
Find your API key in the Nylas dashboard → API keys, and pick the region your Nylas application lives in. A default grant id is optional — you can set one now or pass grant_id per call (list connected accounts with nylas_list_grants). Your API key is used only to call the API on your behalf and to derive a private account id; it is never shown to anyone.
Add only the URL. Do not add an Authorization header or an API key to the client config. The server signs you in with OAuth: the login page asks for your Nylas API key and Region. If the config has such a header, remove it: some clients then send that header instead of the login token, and every call fails with 401.
Turn on the Nylas connector, then ask in plain words. The AI picks the tools.
| Tool | Type | What it does |
|---|---|---|
nylas_list_grants | read | List grants (connected accounts) List the connected accounts (grants) on this Nylas application, each with a grant_id used to scope other tools. Not grant-scoped. Nylas v3: GET /v3/grants. |
nylas_get_grant | read | Get a grant Get details for a single connected account (grant). Nylas v3: GET /v3/grants/{grant_id}. |
nylas_list_messages | read | List messages List email messages for the connected account, with optional filters. Nylas v3: GET /v3/grants/{grant_id}/messages. |
nylas_get_message | read | Get a message Get a single email message by id. Nylas v3: GET /v3/grants/{grant_id}/messages/{message_id}. |
nylas_list_folders | read | List folders List mail folders/labels for the connected account. Nylas v3: GET /v3/grants/{grant_id}/folders. |
nylas_list_calendars | read | List calendars List calendars for the connected account (each has a calendar_id used by the events tools). Nylas v3: GET /v3/grants/{grant_id}/calendars. |
nylas_get_calendar | read | Get a calendar Get a single calendar by id. Nylas v3: GET /v3/grants/{grant_id}/calendars/{calendar_id}. |
nylas_list_events | read | List events List calendar events. Requires calendar_id (sent as a query param). Nylas v3: GET /v3/grants/{grant_id}/events. |
nylas_get_event | read | Get an event Get a single calendar event by id. Requires calendar_id (sent as a query param). Nylas v3: GET /v3/grants/{grant_id}/events/{event_id}. |
nylas_list_contacts | read | List contacts List contacts for the connected account, with optional email/phone filters. Nylas v3: GET /v3/grants/{grant_id}/contacts. |
nylas_get_contact | read | Get a contact Get a single contact by id. Nylas v3: GET /v3/grants/{grant_id}/contacts/{contact_id}. |
nylas_list_drafts | read | List drafts List draft emails for the connected account. Nylas v3: GET /v3/grants/{grant_id}/drafts. |
nylas_send_message | write | Send an email SENDS a real email via the connected account. This dispatches an actual message. Nylas v3: POST /v3/grants/{grant_id}/messages/send. |
nylas_create_event | write | Create a calendar event Creates a calendar event (may send invites to participants). Requires calendar_id (sent as a query param). Nylas v3: POST /v3/grants/{grant_id}/events. |
nylas_create_draft | write | Create a draft email Creates a draft email (does NOT send — safe/additive). Nylas v3: POST /v3/grants/{grant_id}/drafts. |
nylas_usage_status | Usage status (free-tier meter) Report the caller's current free-tier usage this month: calls used, monthly limit, remaining, and whether the cap is reached. Read-only; does not count against the meter. | |
nylas_request_feature | Request a missing feature Tell usefulapi that the user needs something the Nylas tools cannot do yet (a missing tool, field or filter). Call it only when the user asks for something none of the tools can do, and tell the user that you send the request. Do not call it for errors or for normal requests. Do not include personal data, credentials or customer records. Stored with the product name and the client type (for example Claude or Cursor), without the user's account. At most 5 requests per day. Does not count against the meter. | |
nylas_upgrade | Upgrade to Pro (unlimited) Subscribe to the Pro plan for UNLIMITED Nylas tool calls (the free tier caps monthly usage). Choose monthly ($9/month) or yearly ($90/year — 2 months free) billing. Returns a Stripe Checkout link to open in your browser; after payment your account upgrades automatically. Does not count against the meter. | |
nylas_cancel_subscription | Cancel the Pro subscription Cancel the caller's Nylas Pro subscription at the end of the paid period (no refund for the current period; unlimited calls continue until then, then the free tier applies). Requires confirm: true. Run nylas_upgrade later to undo the cancel before the period ends. Does not count against the meter. |
| Plan | Price | Limit |
|---|---|---|
| Free | $0 | 100 tool calls / month |
| Pro | $9/mo · $90/yr | Unlimited |
Pro covers this Nylas server only. Subscribe with nylas_upgrade (it returns a Stripe Checkout link). Cancel any time with nylas_cancel_subscription: Pro continues to the end of the paid period, with no refund for the current period, and running nylas_upgrade before then undoes the cancel. Or write to [email protected].
No. usefulapi is an independent service. It is not affiliated with or endorsed by Nylas. The server calls the Nylas API with your own Nylas access, so it sees only the data that your account can see.
The login page asks for your Nylas API key and Region. See Before you connect for where to find them.
No. Add only the URL. Do not add an Authorization header or an API key to the client config. The server signs you in with OAuth: the login page asks for your Nylas API key and Region. If the config has such a header, remove it: some clients then send that header instead of the login token, and every call fails with 401.
The login stores them encrypted in the authorization grant of your connection. The server uses them to call the Nylas API for you and to derive a private account id for usage metering. usefulapi does not show them on any page or in any reply. To stop all access, remove the connector and change or delete these credentials in Nylas.
Yes, if you approve it. 3 of the 15 Nylas tools can create or change data. The other 12 are marked read-only. Most MCP clients ask you to approve a tool call before it runs.
The Free plan gives 100 tool calls / month. Pro costs $9/mo or $90/yr, with unlimited tool calls, for this Nylas server only. Run nylas_usage_status to see how many calls you used.
Ask the AI to run nylas_upgrade: it returns a Stripe Checkout link. To cancel, run nylas_cancel_subscription. Pro continues to the end of the paid period.
Tell the AI what you wanted to do. It can send the request with nylas_request_feature. We store the text with the server name, the type of AI client and the tool you tried, not with your account, and read every request when we plan new tools. You can send up to 5 requests per day.
Any client that supports remote MCP servers (Streamable HTTP) with OAuth login: Claude (web and desktop), Claude Code, Cursor, VS Code, Windsurf and others.
This is a Model Context Protocol endpoint — meant to be connected from an AI client, not opened in a browser. An invalid_token response at the URL is the auth gate working as designed; clients authenticate automatically.