usefulapiBenchmark Email MCP server
Manage Benchmark Email lists and contacts, and read campaign reports: opens, clicks, bounces. Hosted by usefulapi: connect it to Claude, ChatGPT, Cursor or any MCP client.
What can I ask?
Turn on the Benchmark Email connector, then ask in plain words. The AI picks the tools.
- How many contacts do I have on each email list?
- How did my last email campaign do for opens and clicks?
- Which email addresses bounced on my latest campaign?
- Add jane.smith@example.com to my Newsletter list.
What you can do with Benchmark Email in Claude and ChatGPT
For small business marketers who send email campaigns with Benchmark Email.
Check how a campaign did
The AI reads the report of an email: recipients, opens, clicks, bounces, unsubscribes and rates. It compares campaigns using the report summaries.
Review opens, clicks, bounces and unsubscribes
The AI lists the contacts who opened or clicked an email, the addresses that bounced with bounce type, and who unsubscribed with the reason.
Count list contacts and check account usage
The AI lists contact lists with their contact counts and reads the plan and contact usage of the account.
Look up an email address or add a contact
The AI finds an email address across all lists, or adds a contact to a list. Adding does not send an email, so only add people who agreed to get email.
Changes dataUpdate or unsubscribe a contact
The AI changes fields of a contact, or moves it to the Do Not Contact list so no campaign reaches it again. The API has no undo for this.
Changes dataHow do I connect Benchmark Email?
Before you connect
The login page asks for your Benchmark Email API token.
Find it in Benchmark Email under Integrations (ui.benchmarkemail.com/Integrate) in the API tab. Any account type, including the free plan, has an API token. The token acts as the account owner; it is used only to call the Benchmark Email API on your behalf and is never shown to anyone.
Claude claude.ai · Desktop
- Open Customize → Connectors, then click + Add → Add custom connector.
- Enter the name Benchmark Email and this URL, then click Add:https://
benchmark-email. usefulapi. io/ mcp - Claude opens the login page: enter your Benchmark Email API token.
- In a chat, click + → Connectors and turn on Benchmark Email.
Team and Enterprise: an Owner adds the connector for the organization first.
ChatGPT chatgpt.com
- Open Plugins, click +, then Add custom MCP server.
- Enter the name Benchmark Email and this URL, choose OAuth as the authentication, confirm the warning and create it:https://
benchmark-email. usefulapi. io/ mcp - ChatGPT opens the login page: enter your Benchmark Email API token.
- In Plugins, install Benchmark Email, then choose it in a chat.
No Add custom MCP server option? It depends on your account or workspace settings: see OpenAI's guide.
Claude Code
Run this command, then run /mcp in Claude Code to log in:
Cursor
Add to Cursor or add this to ~/.cursor/mcp.json:
{
"mcpServers": {
"benchmark-email": {
"url": "https://benchmark-email.usefulapi.io/mcp"
}
}
} VS Code
Add to VS Code or add this to .vscode/mcp.json:
{
"servers": {
"benchmark-email": {
"type": "http",
"url": "https://benchmark-email.usefulapi.io/mcp"
}
}
} Codex
Run these commands. The second one opens the login page:
Other clients
Windsurf, Cline, Zed and other MCP clients: add this URL as a remote MCP server (Streamable HTTP). The client then opens the login page in your browser.
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 Benchmark Email API token. 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.
Pricing
| Plan | Price | Limit |
|---|---|---|
| Free | $0 | 50 tool calls / month |
| Proper user | $9/mo · $90/yr | 10,000 tool calls / month |
| Pro+per user | $39/mo · $390/yr | 100,000 tool calls / month |
Each paid plan covers this Benchmark Email server only. Ask your AI to run benchmark_upgrade and choose Pro or Pro+, billed monthly or yearly (it returns a Stripe Checkout link). If you already have Pro, ask to change it to Pro+. The change requires your confirmation, keeps your billing interval and charges the price difference for the rest of the period immediately. Cancel any time with benchmark_cancel_subscription: your paid plan continues to the end of the paid period, with no refund for the current period, and asking to resume the same plan with benchmark_upgrade before then undoes the cancel. Or write to support@usefulapi.io.
Tools 29
Show all 29 tools (the AI picks them for you)
Read only · 21
- Get account
benchmark_get_accountThe Benchmark Email account this token belongs to: client id, name, company, email, status, plan products, contact count and emails sent. - Get plan and usage
benchmark_get_planThe account's email plan, add-ons and contact usage (active, account and total contacts, percent used). - Get account settings
benchmark_get_settingsDefault sender settings: from name and email, signature, footer, time zone, language and company address. The API token in the reply is removed. - List contact lists
benchmark_list_listsList contact lists with id, name, description, contact count and dates. Use the ids with the contact tools. - Get contact list
benchmark_get_listOne contact list: name, description, active contact count and its custom field names (Field1Name ...). - Get contact list fields
benchmark_get_list_fieldsThe column names of a contact list (email, firstname, lastname and the custom fields). - List segments
benchmark_list_segmentsList the saved segments (filtered subsets of lists) with id and name. - List contacts in a list
benchmark_list_contactsList the contacts of one list with email, name, dates and id. Filter by status (subscribed, unsubscribed, hard_bounced) or search a column. - Get contact
benchmark_get_contactOne contact of a list with all its fields (Field1 ... Field24 hold the custom columns). - Search contacts by email
benchmark_search_contactsFind an email address across all lists: one row per list it is on, with the list name, contact id and master-unsubscribe flag. - List emails (campaigns)
benchmark_list_emailsList email campaigns with id, name, subject, type, status, dates and target lists. - Get email (campaign)
benchmark_get_emailOne email campaign: subject, sender, target and excluded lists, dates and settings. - List email report summaries
benchmark_list_email_reportsReport summaries of sent emails: sends, opens, clicks, bounces, unsubscribes and complaints per campaign. - Get email report
benchmark_get_email_reportThe report summary of one email: recipients, opens, clicks, bounces, unsubscribes, forwards, complaints and rates. - Get email opens
benchmark_get_email_opensWho opened an email: contact, email address, time and device. - Get email clicks
benchmark_get_email_clicksWho clicked a link in an email: contact, email address and time. - Get email bounces
benchmark_get_email_bouncesWhich addresses bounced for an email: contact, email address, time and bounce type. - Get email unsubscribes
benchmark_get_email_unsubscribesWho unsubscribed after an email: contact, email address, time and reason, with a count per reason. - List signup forms
benchmark_list_signup_formsList signup forms with id, name, date and the lists they feed. - Get signup form
benchmark_get_signup_formOne signup form with its settings and target lists. - Get signup form link
benchmark_get_signup_form_linkThe public link of a signup form.
Changes data · 4
- Create contact list
benchmark_create_listWRITE: create an empty contact list. - Add contact to a list
benchmark_add_contactWRITE: add one contact to a list (or update it if the email is already there, as the vendor decides). It does not send any email. Only add people who agreed to get email. - Update contact
benchmark_update_contactWRITE: change fields of one contact in one list. Only the fields you pass are sent. - Unsubscribe contact
benchmark_unsubscribe_contactWRITE: move a contact to the Do Not Contact (master unsubscribe) list, so no campaign reaches it again. The API has no undo for this.
Your usefulapi plan · 4
- Usage status (free-tier meter)
benchmark_usage_statusReport 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. - Request a missing feature
benchmark_request_featureTell usefulapi that the user needs something the Benchmark Email 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. - Upgrade to Pro or Pro+
benchmark_upgradeGet a paid plan for Benchmark Email (the free tier caps monthly usage). Pro: 10,000 tool calls a month, for normal use — plan "monthly" ($9/month) or "yearly" ($90/year, 2 months free). Pro+: 100,000 tool calls a month, for automations and heavy use — plan "plus" ($39/month) or "plus_yearly" ($390/year). Without a plan it returns both Pro and Pro+, each with a payment link, for the user to choose; with a plan, one link. An existing Pro subscription changes to Pro+ in place: call without confirm first, as the reply states the exact charge for this account (the price difference for the rest of the period, or in a free Pro trial the full Pro+ price, as the trial ends); then call with confirm: true. Cancel any time: the plan then runs to the end of the paid period, so it also suits a one-time job. A link opens Stripe Checkout in the browser; after payment the account upgrades automatically. Does not count against the meter. - Cancel the Pro subscription
benchmark_cancel_subscriptionCancel the caller's Benchmark Email 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 benchmark_upgrade later to undo the cancel before the period ends. Does not count against the meter.
FAQ
What can I do with Benchmark Email in Claude or ChatGPT?
Check how a campaign did. Review opens, clicks, bounces and unsubscribes. Count list contacts and check account usage. Look up an email address or add a contact. Update or unsubscribe a contact. See what you can do for the details.
Is this an official Benchmark Email product?
No. usefulapi is an independent service. It is not affiliated with or endorsed by Benchmark Email. The server calls the Benchmark Email API with your own Benchmark Email access, so it sees only the data that your account can see.
Can I connect Benchmark Email to Claude or ChatGPT?
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.
What do I need to connect?
The login page asks for your Benchmark Email API token. See Before you connect for where to find it.
Do I put my Benchmark Email key or an Authorization header in the client config?
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 Benchmark Email API token. 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.
How do you keep my Benchmark Email credentials?
The login stores them encrypted in the authorization grant of your connection. The server uses them to call the Benchmark Email 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 Benchmark Email.
Can the AI change my Benchmark Email data?
Yes, if you approve it. 4 of the 25 Benchmark Email tools can create or change data. The other 21 are marked read-only. Most MCP clients ask you to approve a tool call before it runs.
What does it cost?
The Free plan gives 50 tool calls / month. Pro costs $9/mo or $90/yr, with 10,000 tool calls / month. Pro+ costs $39/mo or $390/yr, with 100,000 tool calls / month. Each subscription covers this Benchmark Email server only. Cancel any time: your paid plan then runs to the end of the paid period. Run benchmark_usage_status to see how many calls you used.
How do I subscribe or cancel?
Ask the AI to run benchmark_upgrade and choose Pro or Pro+, billed monthly or yearly: it returns a Stripe Checkout link. If you already have Pro, ask to change it to Pro+. After you confirm, your existing subscription changes in place, keeps its billing interval and charges the price difference for the rest of the period immediately. To cancel, run benchmark_cancel_subscription. Your paid plan continues to the end of the paid period.
What if a Benchmark Email tool that I need is missing?
Tell the AI what you wanted to do. It can send the request with benchmark_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.
Which AI clients can I use?
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.