About NoBounce Email Validation
NoBounce Email Validation is an MCP server for AI assistants that need to check individual email addresses or lists through the NoBounce API. It combines syntax and domain checks with optional SMTP verification and bulk processing.
Key features
- 01Check email syntax and domain
- 02Look up DNS MX records
- 03Detect disposable and role accounts
- 04Suggest corrections for typos
- 05Optional SMTP mailbox check
- 06Validate email batches
Use cases
- 01Check an address before contacting it
- 02Screen sign-up email lists
- 03Find disposable or role addresses
- 04Review large lists in batches
MCP support
Provides MCP tools for validating one email address or a batch of up to 1,000 addresses. It requires a NoBounce API key.
Configuration
Remote servers need no local install. Pick your client, then copy the config or install in one click.
https://nobounceapi.com/mcpclaude mcp add --transport http notprathap-nobounce https://nobounceapi.com/mcp{"mcpServers":{"notprathap-nobounce":{"type":"http","url":"https://nobounceapi.com/mcp"}}}Open in Cursor{"servers":{"notprathap-nobounce":{"type":"http","url":"https://nobounceapi.com/mcp"}}}Open in VS Code{"mcpServers":{"notprathap-nobounce":{"type":"http","url":"https://nobounceapi.com/mcp"}}}{"mcpServers":{"notprathap-nobounce":{"serverUrl":"https://nobounceapi.com/mcp"}}}Run commands in a terminal; paste JSON into the client’s MCP config and restart. Servers that need sign-in will prompt on first connect.
https://nobounceapi.com/mcpAuth requiredTools
2| Parameter | Type | Required | Description |
|---|---|---|---|
| string | Yes | The email address to validate (e.g., [email protected]) | |
| smtp_check | boolean | No | Perform deep SMTP mailbox handshake (default: false) |
Details
From the project READMENoBounce Email Validation MCP Server (nobounce-mcp)
Official Model Context Protocol (MCP) server for NoBounce Email Validation & Bulk CSV Verification API.
Allows AI assistants (Claude Desktop, Cursor, Windsurf, Cline, etc.) to verify single email addresses and bulk email lists in real time:
- RFC 5322 Syntax & Domain Check
- DNS MX Record Lookup
- 5,000+ Disposable / Temp-Mail Provider Detection
- Role Account Detection (
support@,admin@,sales@) - Typo Suggestion (
gmial.com->gmail.com) - Optional Deep SMTP Mailbox Handshake
- Bulk Batch Validation (up to 1,000 emails per call with graceful partial-quota processing)
Get a Free API Key
Grab a free API key (100 free validations/month, no credit card required) at https://nobounceapi.com/register.
Tools Provided
validate_email— Validate a single email address (email, optionalsmtp_check).validate_emails_bulk— Validate an array of up to 1,000 email addresses (emails, optionalsmtp_check).
Quickstart (Claude Desktop / Cursor / Windsurf)
Add to your claude_desktop_config.json or .cursor/mcp.json:
{
"mcpServers": {
"nobounce": {
"command": "npx",
"args": ["-y", "github:notprathap/nobounce-mcp"],
"env": {
"NOBOUNCE_API_KEY": "nb-your-api-key-here"
}
}
}
}
License
MIT — https://nobounceapi.com
Comments
New to MCP?
From what the protocol is to installing your first server, these answers cover most first questions.
An open protocol that defines how AI applications connect to external tools and data in a uniform way. Clients talk to the model; MCP servers provide tools, resources and prompt templates. They exchange standard messages, so one server can be reused by many clients.