MCP Server for Email Verification
Email Verification MCP Server
Connect AI clients to BillionVerify email verification through one hosted MCP endpoint and OAuth.
No local package is required for remote MCP clients. Connect the hosted endpoint and sign in with OAuth. If your client only supports local stdio servers, use the BillionVerify CLI or REST API.
claude mcp add --transport http billionverify https://mcp.billionverify.com/mcphttps://mcp.billionverify.com/mcp
Connect in Three Steps
Add the endpoint, sign in, and let your client discover the tools.
Create Account
Create a BillionVerify account or use your existing one.
Add Remote Endpoint
Add https://mcp.billionverify.com/mcp to your client settings.
Authenticate
Complete OAuth in your browser and approve the connection.
Verification Tools Your Agent Can Call
Check one mailbox or send a batch when the workflow already has a list.
Real-time Verification
Verify one address and return a status the agent can act on.
Batch Processing
Verify a list in one tool call instead of looping over addresses.
SMTP Verification
Check mailbox signals beyond syntax and domain records.
Works with the Clients You Already Use
Connect from chat, coding tools, or your own MCP client.
AI Chat Clients
Claude Desktop, ChatGPT Desktop, DeepSeek, Kimi, MiniMax, Doubao
AI Coding Tools
Claude Code, OpenCode, Cursor, Windsurf, Cline, Continue, Zed
Custom Integration
REST API, HTTP Streamable Transport, JSON-RPC 2.0
Mailbox Checks, Not Format Guesses
Syntax and MX records are useful signals, but they do not prove a mailbox accepts mail.
Syntax and DNS checks only show that an address looks plausible and its domain can receive mail.
BillionVerify evaluates mailbox-level signals and returns valid, invalid, or unknown for the agent to handle.
Frequently Asked Questions
1. Do I need to install anything for Claude Code or OpenCode?
No local package is required for remote MCP clients. Connect the hosted endpoint and sign in with OAuth. If your client only supports local stdio servers, use the BillionVerify CLI or REST API.
2. How do I use this with Claude Code?
Run: claude mcp add --transport http billionverify https://mcp.billionverify.com/mcp. Then run /mcp inside Claude Code and complete OAuth in your browser.
3. How do I set up in Cursor or Windsurf?
Go to MCP settings in Cursor or Windsurf, add the hosted endpoint https://mcp.billionverify.com/mcp, and complete OAuth if the client supports remote MCP sign-in.
4. Can I use this with ChatGPT, DeepSeek, or Kimi?
Yes. ChatGPT can connect directly to https://mcp.billionverify.com/mcp and complete BillionVerify sign-in and consent in the browser.
5. Can I call this from Anthropic SDK or OpenAI SDK?
Yes. Use our REST API endpoint or integrate MCP tools programmatically. Works with Anthropic SDK, OpenAI SDK, Vercel AI SDK, and LangChain.
Connect BillionVerify to Your MCP Client
Add the hosted endpoint and complete OAuth. No local server or URL-embedded API key.
Hosted remote MCP server · No local package required · OAuth handled by client