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Email Verification API

br0ski777/email-verification-x402

A straightforward email validation service that checks syntax, MX records, and flags disposable addresses, then returns a quality score from 0 to 100. Runs as a remote MCP server over SSE and charges per verification using x402 micropayments in USDC. You'd reach for this when your agent needs to validate user input or clean email lists without spinning up your own infrastructure. The repository shows it's built in TypeScript and deployed at email-verification.api.klymax402.com, though the actual MCP tools and prompts aren't documented in the source. The micropayment model means you pay only for what you use rather than maintaining an API subscription.

tools
2
transport
SSE
last updated
May 16, 2026
View on GitHub

Tools

2 tools

Public tool metadata for what this MCP can expose to an agent.

email_verify_addressVerify email deliverability in real-time. Alternative to Hunter email-verifier at 15x lower cost. Returns a structured JSON report with syntax, MX, disposable detection, role-based flags, and quality1 params

Verify email deliverability in real-time. Alternative to Hunter email-verifier at 15x lower cost. Returns a structured JSON report with syntax, MX, disposable detection, role-based flags, and quality

Parameters* required
emailstring
Email address to verify (e.g. user@example.com)
email_verify_batchUse this when you need to validate multiple email addresses at once (up to 100). Returns a JSON array of verification results plus summary counts. 1. results (array) -- each entry has valid, syntax,1 params

Use this when you need to validate multiple email addresses at once (up to 100). Returns a JSON array of verification results plus summary counts. 1. results (array) -- each entry has valid, syntax,

Parameters* required
emailsarray
Array of email addresses (max 100)

Sponsors

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Readme

Email Verification API

MCP Server x402 License: MIT

Real-time email verification API. Syntax, MX, disposable detection, role-based flags, quality score 0-100. Built for agent outreach pipelines. Pay-per-call via x402 (USDC on Base L2) -- no API key, no signup, no rate-limit wall.

Part of the klymax402 marketplace -- 100 x402 micropayment APIs for AI agents, one wallet, USDC on Base.

Quickstart -- MCP

Add to your MCP client config (Claude Desktop, Cursor, ElizaOS, etc.):

{
  "mcpServers": {
    "email-verification": {
      "url": "https://email-verification.api.klymax402.com/mcp"
    }
  }
}

Quickstart -- HTTP (x402)

curl -X POST "https://email-verification.api.klymax402.com/api/verify" \
  -H "Content-Type: application/json" \
  -d '{"email":"user@example.com"}'
# -> 402 Payment Required, with an x402 payment challenge in the response body

View the full README on GitHub

Details

Repository
github.com/br0ski777/email-verification-x402
Website
github.com/Br0ski777/email-verification-x402
Category
Communication & Messaging
Transport
SSE
Registry
MCP registry, active

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