NoBounce Email Validation MCP Server

by notprathap Your server? Claim it

answering

NoBounce Email Validation is answering right now. Last checked 12 min ago. It exposes 2 tools. Last commit 16 Oct 2026.

Real-time single and bulk email validation (syntax, MX, 5,000+ disposable domains, SMTP).

Uptime history 18 hours of history · worst hour 0%

18 hours agonow

12.5%

Uptime 24h

8 of 64 checks

Tools

read from the server

686 ms

Response time

average over 24h

Stars

last commit 16 Oct 2026

NoBounce Email Validation does not always answer

Over the last week it answered 12.5% of our checks. We check every 15 minutes, so you hear about the next outage within the hour — not from your users.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 12 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add nobounce-mcp --transport http https://nobounceapi.com/mcp

~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "nobounce-mcp": {
      "url": "https://nobounceapi.com/mcp"
    }
  }
}

~/.codex/config.toml

[mcp_servers.nobounce-mcp]
url = "https://nobounceapi.com/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "nobounce-mcp": {
      "url": "https://nobounceapi.com/mcp"
    }
  }
}

.vscode/mcp.json

{
  "mcpServers": {
    "nobounce-mcp": {
      "url": "https://nobounceapi.com/mcp"
    }
  }
}

Available tools 2

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

validate

validate_email

Validate a single email address in real time using NoBounce API. Checks RFC 5322 syntax, DNS MX records, 5,000+ disposable providers, role accounts, free webmail providers, typo suggestions, and optional SMTP handshake.

validate_emails_bulk

Validate a batch of up to 1,000 email addresses in a single call using NoBounce API. Returns per-email validation results plus summary counts (valid, invalid, disposable, catch_all, unknown).

Endpoints

URL	Transport	State	Latency	Checked
https://nobounceapi.com/mcp	streamable-http	answering	260 ms	12 min ago

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NoBounce Email Validation — questions

Answers built from our own checks of this server.

What can NoBounce Email Validation do?

It exposes 2 tools, read directly from the server on our last check. Among them: validate_email, validate_emails_bulk. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →

Is NoBounce Email Validation working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 8 of 64 checks got a reply (12.5%), average response time 686 ms. The bar chart above shows every period we have measured.

How do I connect NoBounce Email Validation?

Copy the ready config from this page — we generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each with the file path that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.

Does NoBounce Email Validation need an API key?

No. NoBounce Email Validation completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 2 of them are readable on this page. This is what we observed, not what the docs claim.

How fast is NoBounce Email Validation?

It answers our handshake in 686 ms on average, which is faster than 14% of all working MCP servers we measure. That is on the slow side — worth knowing if the tool sits inside an interactive loop. The comparison comes from our own checks across the whole registry, every 15 minutes.

Is NoBounce Email Validation open source?

Yes — it is published under the MIT licence, written in JavaScript and 0 stars on GitHub. The source link is on this page, so you can read exactly what it does with your data before you connect it.