Read subscribers, groups, campaigns, fields, segments, automations, webhooks; safe additive writes. 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": {
"mailerlite": {
"url": "https://mailerlite.usefulapi.io/mcp"
}
}
}Add to VS Code or add this to .vscode/mcp.json:
{
"servers": {
"mailerlite": {
"type": "http",
"url": "https://mailerlite.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 MailerLite API key.
Find it in MailerLite → Integrations → API (or Developers API). Your 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 MailerLite API key. 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 MailerLite connector, then ask in plain words. The AI picks the tools.
| Tool | Type | What it does |
|---|---|---|
mailerlite_list_subscribers | read | List subscribers List subscribers, optionally filtered by status. Cursor-paginated. MailerLite API: GET /subscribers. |
mailerlite_get_subscriber | read | Get subscriber Fetch a single subscriber by id or email address. MailerLite API: GET /subscribers/{id}. |
mailerlite_list_groups | read | List groups List subscriber groups/lists, optionally filtered by name. Page-paginated. MailerLite API: GET /groups. |
mailerlite_list_group_subscribers | read | List group subscribers List the subscribers belonging to a group, optionally filtered by status. Cursor-paginated. MailerLite API: GET /groups/{group_id}/subscribers. |
mailerlite_list_campaigns | read | List campaigns List campaigns, optionally filtered by status. Page-paginated. Read-only — this server does NOT send campaigns. MailerLite API: GET /campaigns. |
mailerlite_get_campaign | read | Get campaign Fetch a single campaign by id. Read-only. MailerLite API: GET /campaigns/{campaign_id}. |
mailerlite_list_fields | read | List fields List custom/default subscriber fields, optionally filtered by type or keyword. Page-paginated. MailerLite API: GET /fields. |
mailerlite_list_segments | read | List segments List segments. Page-paginated. MailerLite API: GET /segments. |
mailerlite_list_automations | read | List automations List automations (workflows), optionally filtered by enabled state. Page-paginated. MailerLite API: GET /automations. |
mailerlite_list_webhooks | read | List webhooks List configured webhooks. Page-paginated. MailerLite API: GET /webhooks. |
mailerlite_upsert_subscriber | write | Upsert subscriber Creates or updates a subscriber (upsert by email). Additive — does NOT send any email. MailerLite API: POST /subscribers. |
mailerlite_create_group | write | Create group Creates a subscriber group/list (additive). MailerLite API: POST /groups. |
mailerlite_assign_subscriber_to_group | write | Assign subscriber to group Adds a subscriber to a group (additive membership). MailerLite API: POST /subscribers/{subscriber_id}/groups/{group_id}. |
mailerlite_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. | |
mailerlite_request_feature | Request a missing feature Tell usefulapi that the user needs something the MailerLite 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. | |
mailerlite_upgrade | Upgrade to Pro (unlimited) Subscribe to the Pro plan for UNLIMITED MailerLite 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. | |
mailerlite_cancel_subscription | Cancel the Pro subscription Cancel the caller's MailerLite 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 mailerlite_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 MailerLite server only. Subscribe with mailerlite_upgrade (it returns a Stripe Checkout link). Cancel any time with mailerlite_cancel_subscription: Pro continues to the end of the paid period, with no refund for the current period, and running mailerlite_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 MailerLite. The server calls the MailerLite API with your own MailerLite access, so it sees only the data that your account can see.
The login page asks for your MailerLite API key. See Before you connect for where to find it.
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 MailerLite API key. 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 MailerLite 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 MailerLite.
Yes, if you approve it. 3 of the 13 MailerLite tools can create or change data. The other 10 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 MailerLite server only. Run mailerlite_usage_status to see how many calls you used.
Ask the AI to run mailerlite_upgrade: it returns a Stripe Checkout link. To cancel, run mailerlite_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 mailerlite_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.