Manage lists, contacts and campaigns, and read campaign performance reports on EmailOctopus. 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": {
"emailoctopus": {
"url": "https://emailoctopus.usefulapi.io/mcp"
}
}
}Add to VS Code or add this to .vscode/mcp.json:
{
"servers": {
"emailoctopus": {
"type": "http",
"url": "https://emailoctopus.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 EmailOctopus API key.
Find it in EmailOctopus → Settings → API keys (app.emailoctopus.com → API keys). 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 EmailOctopus 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 EmailOctopus connector, then ask in plain words. The AI picks the tools.
| Tool | Type | What it does |
|---|---|---|
emailoctopus_list_lists | read | List lists List all lists in the account. Returns {data:[...],paging:{...}} — each list's id, name, contact counts by status, and created_at. Paginate with `limit` (max 100) and `starting_after` (cursor from the previous page). EmailOctopus: GET /lists. |
emailoctopus_get_list | read | Get list Get a single list by its id. Returns the list's full state — name, contact counts by status, and created_at. EmailOctopus: GET /lists/{list_id}. |
emailoctopus_list_contacts | read | List contacts List the contacts in a list. Returns {data:[...],paging:{...}} — each contact's id, email_address, fields, tags, status, and created_at. Paginate with `limit` (max 100) and `starting_after`. EmailOctopus: GET /lists/{list_id}/contacts. |
emailoctopus_get_contact | read | Get contact Get a single contact in a list. Returns email_address, fields, tags, status, and created_at. `contact_id` is the MD5 hash of the lowercased email address, or the `id` returned by emailoctopus_list_contacts. EmailOctopus: GET /lists/{list_id}/contacts/{contact_id}. |
emailoctopus_list_campaigns | read | List campaigns List all campaigns in the account. Returns {data:[...],paging:{...}} — each campaign's id, name, status, subject, and created_at. Paginate with `limit` (max 100) and `starting_after`. EmailOctopus: GET /campaigns. |
emailoctopus_get_campaign | read | Get campaign Get a single campaign by its id. Returns the campaign's full state — name, status, subject, from, content, and created_at. EmailOctopus: GET /campaigns/{campaign_id}. |
emailoctopus_get_campaign_report | read | Get campaign report Get a campaign's aggregate performance report — sent, opened, clicked, bounced, unsubscribed, complained, and related counts. EmailOctopus: GET /campaigns/{campaign_id}/reports/summary. |
emailoctopus_get_campaign_links_report | read | Get campaign links report Get a campaign's per-link click report — for each link in the campaign, the URL and its click counts. EmailOctopus: GET /campaigns/{campaign_id}/reports/links. |
emailoctopus_create_list | write | Create list CREATES a new list — this MODIFIES live data. Provide a `name`. EmailOctopus: POST /lists. Returns the created list. |
emailoctopus_update_list | write | Update list UPDATES an existing list by id — this MODIFIES live data. Sets the list's `name`. EmailOctopus: PUT /lists/{list_id}. Returns the updated list. |
emailoctopus_create_contact | write | Create contact CREATES a new contact in a list — this MODIFIES live data (adds a subscriber). `email_address` is required; optionally set `fields` (keyed by field tag), `tags`, and `status`. EmailOctopus: POST /lists/{list_id}/contacts. Returns the created contact. |
emailoctopus_update_contact | write | Update contact UPDATES an existing contact in a list — this MODIFIES live data. Send only the fields you want to change (email_address, fields, tags, status). `contact_id` is the MD5 hash of the lowercased email address, or the id from list_contacts. EmailOctopus: PUT /lists/{list_id}/contacts/{contact_id}. Returns the updated contact. |
emailoctopus_delete_contact | write | Delete contact PERMANENTLY REMOVES a contact from a list — this MODIFIES live data and cannot be undone. `contact_id` is the MD5 hash of the lowercased email address, or the id from list_contacts. EmailOctopus: DELETE /lists/{list_id}/contacts/{contact_id}. |
emailoctopus_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. | |
emailoctopus_request_feature | Request a missing feature Tell usefulapi that the user needs something the EmailOctopus 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. | |
emailoctopus_upgrade | Upgrade to Pro (unlimited) Subscribe to the Pro plan for UNLIMITED EmailOctopus 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. | |
emailoctopus_cancel_subscription | Cancel the Pro subscription Cancel the caller's EmailOctopus 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 emailoctopus_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 |
| Proper user | $9/mo · $90/yr | Unlimited |
Pro covers this EmailOctopus server only. Subscribe with emailoctopus_upgrade (it returns a Stripe Checkout link). Cancel any time with emailoctopus_cancel_subscription: Pro continues to the end of the paid period, with no refund for the current period, and running emailoctopus_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 EmailOctopus. The server calls the EmailOctopus API with your own EmailOctopus access, so it sees only the data that your account can see.
The login page asks for your EmailOctopus 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 EmailOctopus 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 EmailOctopus 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 EmailOctopus.
Yes, if you approve it. 5 of the 13 EmailOctopus tools can create or change data. The other 8 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 EmailOctopus server only. Run emailoctopus_usage_status to see how many calls you used.
Ask the AI to run emailoctopus_upgrade: it returns a Stripe Checkout link. To cancel, run emailoctopus_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 emailoctopus_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.