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SimpleVerifier MCP server

by Ahmedmkarrar
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Remote

SimpleVerifier MCP server

A remote Model Context Protocol server that gives ChatGPT, Claude, Cursor, VS Code and other MCP clients email and phone checks as tools.

  • Endpoint: https://simpleverifier.com/api/mcp (Streamable HTTP)

  • Auth: OAuth sign-in (ChatGPT, claude.ai, Claude Code) or Authorization: Bearer <API key>

  • Plan: MCP and API access need a SimpleVerifier Pro, Business or Agency plan. Tool calls count against the plan's monthly API calls. Pricing

  • Docs: https://simpleverifier.com/docs/mcp

This repo holds the registry manifest (server.json) and ready-to-copy client configs. The server itself is hosted; there is nothing to install or run.

Tools

Tool

What it does

verify_email

One address: valid, risky or invalid, with a reason. Syntax, domain, disposable and live mailbox (SMTP) checks.

verify_emails

Up to 100 addresses in one call, deduplicated. Returns every result, or a job_id for get_job_results.

get_job_results

Progress and per-address results of a verify_emails job, paged.

check_phone_format

Format, E.164 form, country and numbering-plan line type. A format check only: it never says whether a number is in service.

check_domain

A domain's MX, SPF and DMARC records, disposable status, and an optional catch-all probe.

get_usage

Your plan, what it includes, this month's usage and the rate limit.

Only valid means the mail server confirmed the mailbox. Anything unconfirmed (catch-all domains, providers that hide mailbox status, servers that don't answer) comes back risky.

Related MCP server: InboxValid MCP Server

Connect

Claude Code

claude mcp add --transport http simpleverifier https://simpleverifier.com/api/mcp
# then run /mcp inside a session to sign in, or pass a key:
claude mcp add --transport http simpleverifier https://simpleverifier.com/api/mcp --header "Authorization: Bearer YOUR_API_KEY"

ChatGPT and claude.ai: add a custom connector with the URL https://simpleverifier.com/api/mcp, choose OAuth, then sign in on the SimpleVerifier screen. Step-by-step: https://simpleverifier.com/docs/mcp

Cursor, VS Code, Claude Desktop, Windsurf: copy the matching file from configs/:

Client

File

Goes in

Cursor

cursor.mcp.json

~/.cursor/mcp.json or .cursor/mcp.json

VS Code

vscode.mcp.json

.vscode/mcp.json (asks for the key once, stores it securely)

Claude Desktop

claude_desktop_config.json

Settings > Developer > Edit config (uses mcp-remote, needs Node.js)

Windsurf / Devin Desktop

windsurf.mcp_config.json

~/.config/devin/mcp_config.json (older builds: ~/.codeium/windsurf/mcp_config.json)

Create an API key at https://simpleverifier.com/api-keys. Keys start with sv_live_. Keep them out of shared config files and repositories.

Try it with curl

curl https://simpleverifier.com/api/mcp \
  -H "Authorization: Bearer $SIMPLEVERIFIER_KEY" \
  -H "Content-Type: application/json" \
  -H "Accept: application/json, text/event-stream" \
  -d '{"jsonrpc":"2.0","id":1,"method":"tools/call","params":{"name":"verify_email","arguments":{"email":"jane@company.com"}}}'

Related

License

MIT for the files in this repo. The hosted service is covered by the SimpleVerifier terms.

This server cannot be deployed

One endpoint for every MCP toolRayrun runs every MCP server behind one URL and holds the credentials. Each call is decided per client, tool, and argument, then recorded.ray.runAd

Maintenance

ActivityMaintained
ResponsivenessNo issues

Resources

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