Check BounceBan credits, verify emails and read asynchronous bulk verification results. Hosted by usefulapi: connect it to Claude, ChatGPT, Cursor or any MCP client.
Turn on the BounceBan connector, then ask in plain words. The AI picks the tools.
For marketers and operations teams using BounceBan to review contact addresses.
Read BounceBan verification credits and account rate limits before starting new checks. These allowances are shared across the account’s API keys.
Confirm credit usage to verify one email. If the result is pending, keep its task ID and check that existing task later instead of submitting another verification.
Changes dataConfirm credit usage to submit 1–1,000 email addresses for asynchronous verification, then read the task’s progress and aggregate results. Wait between status checks.
Changes dataCheck the task’s status, then read up to 100 existing email results. Follow further pages only when a continuation cursor is returned; pending tasks need time to finish.
The login page asks for your BounceBan API key.
Find or create a key in BounceBan → API → Settings. Paste only the key, without a Bearer prefix. Connecting only reads your credit balance and rate limits. Verification tools require confirmation and can spend BounceBan credits. All keys in an account share credits, rate limits and any optional IP whitelist; per-key expiry and credit quotas also apply. If a key is rejected, check API Settings and verify your account email. Changing the key creates a separate UsefulAPI billing identity.
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": {
"bounceban": {
"url": "https://bounceban.usefulapi.io/mcp"
}
}
} Add to VS Code or add this to .vscode/mcp.json:
{
"servers": {
"bounceban": {
"type": "http",
"url": "https://bounceban.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 BounceBan 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 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 BounceBan server only. Ask your AI to run bounceban_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 bounceban_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 bounceban_upgrade before then undoes the cancel. Or write to [email protected].
bounceban_accountbounceban_single_statusbounceban_bulk_statusbounceban_bulk_resultsbounceban_verify_emailbounceban_create_bulk_verificationbounceban_usage_statusbounceban_request_featurebounceban_upgradebounceban_cancel_subscriptionCheck credits and account limits. Verify a single contact address. Verify a contact list in bulk. Review an existing bulk task’s results. See what you can do for the details.
No. usefulapi is an independent service. It is not affiliated with or endorsed by BounceBan. The server calls the BounceBan API with your own BounceBan 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 BounceBan 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 BounceBan 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 BounceBan 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 BounceBan.
Yes, if you approve it. 2 of the 6 BounceBan tools can create or change data. The other 4 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 BounceBan server only. Cancel any time: your paid plan then runs to the end of the paid period. Run bounceban_usage_status to see how many calls you used.
Ask the AI to run bounceban_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 bounceban_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 bounceban_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.