Read Reoon credits, quick-check emails, and run confirmed bulk verification jobs. For marketers and operations teams using Reoon Email Verifier. 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": {
"reoon-email-verifier": {
"url": "https://reoon-email-verifier.usefulapi.io/mcp"
}
}
}Add to VS Code or add this to .vscode/mcp.json:
{
"servers": {
"reoon-email-verifier": {
"type": "http",
"url": "https://reoon-email-verifier.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.
Read remaining daily and instant credits before starting your next verification job.
reoon_account_balance
After confirming vendor credit usage, run a QUICK check for syntax, domain and disposable-address signals. This check does not establish that an inbox exists.
Changes data · reoon_verify_email
Confirm credit usage to submit 10–1,000 addresses for POWER verification, then retrieve the job progress and completed results.
Changes data · reoon_create_bulk_verification reoon_bulk_results
Read a page of completed results from an existing task to review address-level verification outcomes.
reoon_bulk_results
The login page asks for your Reoon API key.
Create a key in the Reoon Email Verifier dashboard. Connecting only checks your credit balance; it does not verify an address. Verification tools can spend your Reoon credits and require confirmation. QUICK mode checks syntax and domain signals, not inbox existence; bulk jobs use POWER mode. A changed API key creates a separate UsefulAPI billing identity.
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 Reoon 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 Reoon Email Verifier connector, then ask in plain words. The AI picks the tools.
| Tool | Type | What it does |
|---|---|---|
reoon_account_balance | read | Check Reoon verification credits Read remaining daily and instant Reoon credits without verifying an email. |
reoon_verify_email | write | Quick-check an email with Reoon Check email syntax, domain/MX and disposable-address signals in QUICK mode. Does NOT verify inbox existence or guarantee delivery. Can spend Reoon credits; confirm:true is required. Do not run continuously in more than five parallel requests. Use bulk verification for lists. |
reoon_create_bulk_verification | write | Create a Reoon bulk verification job Submit 10–1,000 emails for asynchronous POWER verification. Starts a vendor job and can spend verification credits. Requires confirm:true; the job may continue if the response is lost. Check the dashboard before resubmitting. Results are later read with reoon_bulk_results. |
reoon_bulk_results | read | Read Reoon bulk progress and results Read a previously created bulk task, its progress, and a bounded page of completed email results. Does not start new verification. Wait between polls. Very large upstream exports must be downloaded in the Reoon dashboard. |
reoon_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. | |
reoon_request_feature | Request a missing feature Tell usefulapi that the user needs something the Reoon Email Verifier 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. | |
reoon_upgrade | Upgrade to Pro (unlimited*) Get Pro: unlimited tool calls (fair use limit: 10,000 a month) on Reoon Email Verifier (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. | |
reoon_cancel_subscription | Cancel the Pro subscription Cancel the caller's Reoon Email Verifier 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 reoon_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 |
| Proper user | $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 Reoon Email Verifier server only. Subscribe with reoon_upgrade (it returns a Stripe Checkout link). Cancel any time with reoon_cancel_subscription: Pro continues to the end of the paid period, with no refund for the current period, and running reoon_upgrade before then undoes the cancel. Or write to [email protected].
Check verification capacity. Screen a new email address. Verify a contact list in bulk. Review a completed verification job. See what you can do for the details.
No. usefulapi is an independent service. It is not affiliated with or endorsed by Reoon Email Verifier. The server calls the Reoon Email Verifier API with your own Reoon Email Verifier 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 Reoon 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 Reoon 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 Reoon Email Verifier 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 Reoon Email Verifier.
Yes, if you approve it. 2 of the 4 Reoon Email Verifier tools can create or change data. The other 2 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 Reoon Email Verifier server only. Cancel any time: Pro then runs to the end of the paid period. Run reoon_usage_status to see how many calls you used.
Ask the AI to run reoon_upgrade: it returns a Stripe Checkout link. To cancel, run reoon_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 reoon_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.