Read audiences, members, campaigns and reports; add, update, tag and archive subscribers. For email marketers and small business owners who send newsletters with Mailchimp. Hosted by usefulapi — connect from Claude, ChatGPT, 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": {
"mailchimp": {
"url": "https://mailchimp.usefulapi.io/mcp"
}
}
}Add to VS Code or add this to .vscode/mcp.json:
{
"servers": {
"mailchimp": {
"type": "http",
"url": "https://mailchimp.usefulapi.io/mcp"
}
}
}No Add custom MCP server option? It depends on your account or workspace settings: see OpenAI's guide.
Run these commands. The second one opens the login page:
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 AI lists campaign reports and opens one with opens, clicks, bounces and unsubscribes. It compares campaigns and points out the best and weakest.
mailchimp_list_reports mailchimp_get_campaign_report mailchimp_list_campaigns
The AI lists audiences and reads one with its subscriber stats and default from-name and email. You see which lists are large.
mailchimp_list_audiences mailchimp_get_audience
The AI searches members by email or name and reads one member's status, merge fields and tags. You learn if a person is subscribed.
mailchimp_search_members mailchimp_get_member mailchimp_list_member_tags
The AI adds a new member to an audience or updates an existing one by email. A pending status sends a double opt-in email.
Changes data · mailchimp_add_member mailchimp_update_member
The AI adds or removes tags on a member, or archives the member. Archive is a soft removal and not a permanent delete.
Changes data · mailchimp_add_member_tags mailchimp_archive_member
The login page asks for your Mailchimp API key.
Find it in Mailchimp → Account & billing → Extras → API keys. Copy the whole key including the trailing datacenter suffix (-us21) — it tells us which Mailchimp server your account lives on. 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 Mailchimp 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 Mailchimp connector, then ask in plain words. The AI picks the tools.
| Tool | Type | What it does |
|---|---|---|
mailchimp_get_account | read | Get account Get the API Root — the authenticated Mailchimp account: account name, total subscribers, contact info, plan and industry stats. REST: GET /. |
mailchimp_list_audiences | read | List audiences (lists) List the account's audiences — Mailchimp's `/lists` resource (an audience is a list of subscribers). Paginated, with optional sort. REST: GET /lists. |
mailchimp_get_audience | read | Get audience (list) Get a single audience (list) by id, including subscriber stats, default from-name/email and settings. REST: GET /lists/{list_id}. |
mailchimp_list_members | read | List members List members of an audience (list). Paginated, with an optional status filter and sort. REST: GET /lists/{list_id}/members. |
mailchimp_get_member | read | Get member Get a single audience member (subscriber) by email or subscriber_hash, including status, merge fields, tags and stats. REST: GET /lists/{list_id}/members/{subscriber_hash} (email → MD5 hash). |
mailchimp_search_members | read | Search members Search for members across the account (or one audience) by email, name or other fields. Returns exact + full-text matches. REST: GET /search-members. |
mailchimp_list_campaigns | read | List campaigns List the account's campaigns (email sends). Paginated, with optional type/status/audience filters and sort. REST: GET /campaigns. |
mailchimp_get_campaign | read | Get campaign Get a single campaign by id, including its settings, recipients and send status. REST: GET /campaigns/{campaign_id}. |
mailchimp_list_reports | read | List reports List campaign reports (aggregate performance for sent campaigns). Paginated, with an optional type filter. REST: GET /reports. |
mailchimp_get_campaign_report | read | Get campaign report Get the report for one campaign — opens, clicks, bounces, unsubscribes and other engagement summary stats. REST: GET /reports/{campaign_id}. |
mailchimp_list_automations | read | List automations List the account's classic automations (automated email workflows). Paginated. REST: GET /automations. |
mailchimp_list_templates | read | List templates List the account's email templates (saved and pre-built layouts). Paginated, with optional type filter and sort. REST: GET /templates. |
mailchimp_list_segments | read | List segments List an audience's segments and tags (saved segments include static tags). Paginated. REST: GET /lists/{list_id}/segments. |
mailchimp_list_member_tags | read | List member tags List the tags applied to a single audience member (by email or subscriber_hash). Paginated. REST: GET /lists/{list_id}/members/{subscriber_hash}/tags (email → MD5 hash). |
mailchimp_add_member | write | Add member Add a new member (subscriber) to an audience (list). Note: status "pending" triggers a double-opt-in confirmation email. REST: POST /lists/{list_id}/members. |
mailchimp_update_member | write | Update member Update an existing audience member (by email or subscriber_hash). Only the fields you supply change. REST: PATCH /lists/{list_id}/members/{subscriber_hash} (email → MD5 hash). |
mailchimp_add_member_tags | write | Add/remove member tags Add and/or remove tags on an audience member (by email or subscriber_hash). `tags` are added (status active); `removeTags` are removed (status inactive). Mailchimp returns HTTP 204 (no body). REST: POST /lists/{list_id}/members/{subscriber_hash}/tags (email → MD5 hash). |
mailchimp_archive_member | write | Archive member Archive (soft-remove) an audience member — reversible; this is NOT the permanent-delete action. REST: DELETE /lists/{list_id}/members/{subscriber_hash} (email → MD5 hash). Returns HTTP 204 (no body). |
mailchimp_usage_status | Usage status (free-tier meter) Report the caller's current usage: the plan, calls used this month, the limit of the plan (the free monthly cap or the Pro fair use limit), remaining, and whether the limit is reached. Read-only; does not count against the meter. | |
mailchimp_request_feature | Request a missing feature Tell usefulapi that the user needs something the Mailchimp 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. | |
mailchimp_upgrade | Upgrade to Pro (unlimited*) Get Pro: unlimited tool calls (fair use limit: 10,000 a month) on Mailchimp (the free tier caps monthly usage). Plans: "monthly" — $9/month; "yearly" — $90/year (2 months free). Cancel any time: Pro then runs to the end of the paid period, so it also suits a one-time job. *A fair use limit applies. For heavy use (near Pro's limit): "plus" or "plus_yearly" — Pro+, $39/month or $390/year, unlimited tool calls (fair use limit: 100,000 a month); an existing Pro subscription changes to Pro+ in place (needs confirm: true; the price difference for the rest of the period is charged at once). Otherwise returns a short link to open in your browser (it opens Stripe Checkout); after payment the account upgrades automatically. Does not count against the meter. | |
mailchimp_cancel_subscription | Cancel the Pro subscription Cancel the caller's Mailchimp Pro subscription at the end of the paid period (no refund for the current period; Pro continues until then, then the free tier applies). Requires confirm: true. Run mailchimp_upgrade later to undo the cancel before the period ends. Does not count against the meter. |
| Plan | Price | Limit |
|---|---|---|
| Free | $0 | 50 tool calls / month |
| Pro | $9/mo · $90/yr | Unlimited* |
*Pro fair use limit: 10,000 tool calls a month on this server. For more, write to [email protected].
Pro covers this Mailchimp server only. Subscribe with mailchimp_upgrade (it returns a Stripe Checkout link). Cancel any time with mailchimp_cancel_subscription: Pro continues to the end of the paid period, with no refund for the current period, and running mailchimp_upgrade before then undoes the cancel. Or write to [email protected].
Compare how your campaigns performed. Check the size of each audience. Look up a subscriber and their tags. Add or update a subscriber. Tag or archive subscribers one by one. See what you can do for the details.
No. usefulapi is an independent service. It is not affiliated with or endorsed by Mailchimp. The server calls the Mailchimp API with your own Mailchimp access, so it sees only the data that your account can see.
Yes. In Claude, add this server's URL as a custom connector. In ChatGPT, add it as a custom MCP server in Plugins. Then log in once. Cursor, VS Code, Claude Code and Codex work too. See the setup steps.
The login page asks for your Mailchimp 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 Mailchimp 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 Mailchimp 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 Mailchimp.
Yes, if you approve it. 4 of the 18 Mailchimp tools can create or change data. The other 14 are marked read-only. Most MCP clients ask you to approve a tool call before it runs.
The Free plan gives 50 tool calls / month. Pro costs $9/mo or $90/yr, with unlimited tool calls (fair use limit: 10,000 tool calls a month), for this Mailchimp server only. Cancel any time: Pro then runs to the end of the paid period. Run mailchimp_usage_status to see how many calls you used.
Ask the AI to run mailchimp_upgrade: it returns a Stripe Checkout link. To cancel, run mailchimp_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 mailchimp_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, ChatGPT, Codex, 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.
Need a tool this server does not have, or a connection to another system? We build custom integrations and MCP servers.