MCP server for NeverBounce — business email verification, credits and bulk jobs. Hosted by usefulapi: connect it to Claude, ChatGPT, Cursor or any MCP client.
Turn on the NeverBounce connector, then ask in plain words. The AI picks the tools.
For B2B sales, marketing, recruiting and business development teams with a NeverBounce account.
Read your credit balance and the number of jobs in each processing state.
List jobs, inspect a selected job and page through its verification results.
Create a bulk job from the addresses you provide without starting paid verification. Start it separately with a maximum credit allowance.
Changes dataCheck one address at its point of entry. Each check spends vendor credits; existing lists should use bulk jobs.
Changes dataThe login page asks for your NeverBounce API key.
Create a Custom Integration app in the NeverBounce dashboard (Apps → Custom Integration) and copy the key (secret_...) from its overview page. Use a V4 key; old V3 credentials do not work. Verifying addresses and starting jobs spends your NeverBounce credits. Use a dedicated Custom Integration key; only connect systems authorized to process these business contacts. Requested addresses, job results and account-credit information pass to your chosen AI client and its LLM provider; verifying addresses sends them to NeverBounce and spends vendor credits. Three write tools verify one address, create a bulk job, or start/sample a job; they do not send email. Single checks are for point-of-entry use, not loops over lists. Review NeverBounce data-contribution privacy settings and terms, which govern its use of business contact data. Reset this app key in NeverBounce to stop access. Billing is per key and changes if it is reset.
Team and Enterprise: an Owner adds the connector for the organization first.
No Add custom MCP server option? It depends on your account or workspace settings: see OpenAI's guide.
Run this command, then run /mcp in Claude Code to log in:
Add to Cursor or add this to ~/.cursor/mcp.json:
{
"mcpServers": {
"neverbounce": {
"url": "https://neverbounce.usefulapi.io/mcp"
}
}
} Add to VS Code or add this to .vscode/mcp.json:
{
"servers": {
"neverbounce": {
"type": "http",
"url": "https://neverbounce.usefulapi.io/mcp"
}
}
} Run these commands. The second one opens the login page:
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 NeverBounce 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.
| Plan | Price | Limit |
|---|---|---|
| Free | $0 | 50 tool calls / month |
| Proper Custom Integration API key | $9/mo · $90/yr | 10,000 tool calls / month |
| Pro+per Custom Integration API key | $39/mo · $390/yr | 100,000 tool calls / month |
Each paid plan covers this NeverBounce server only. Ask your AI to run neverbounce_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 neverbounce_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 neverbounce_upgrade before then undoes the cancel. Or write to [email protected].
neverbounce_get_account_infoneverbounce_list_jobsneverbounce_get_jobneverbounce_get_job_resultsneverbounce_download_job_resultsneverbounce_verify_emailneverbounce_create_jobneverbounce_start_jobneverbounce_usage_statusneverbounce_request_featureneverbounce_upgradeneverbounce_cancel_subscriptionCheck remaining verification credits. Review a bulk verification job. Prepare a business contact list. Verify a newly entered business email. See what you can do for the details.
No. usefulapi is an independent service. It is not affiliated with or endorsed by NeverBounce. The server calls the NeverBounce API with your own NeverBounce 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 NeverBounce 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 NeverBounce 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 NeverBounce 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 NeverBounce.
Yes, if you approve it. 3 of the 8 NeverBounce tools can create or change data. The other 5 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 10,000 tool calls / month. Pro+ costs $39/mo or $390/yr, with 100,000 tool calls / month. Each subscription covers this NeverBounce server only. Cancel any time: your paid plan then runs to the end of the paid period. Run neverbounce_usage_status to see how many calls you used.
Ask the AI to run neverbounce_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 neverbounce_cancel_subscription. Your paid plan continues to the end of the paid period.
Tell the AI what you wanted to do. It can send the request with neverbounce_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.