No2Bounce for Claude

Every marketing team knows the quiet cost of a bad email list: bounced campaigns, wasted sends, and a sender reputation that takes months to repair after one bad blast. Most teams don't catch it until the bounce report lands, and by then the damage is done. The No2Bounce MCP server moves that check earlier, into the conversation where you're already planning your outreach.

MCP, the Model Context Protocol, lets Claude reach outside the conversation and call real external tools on your behalf. Instead of copying an address into a separate dashboard, you just ask Claude. The No2Bounce MCP server connects it directly to the No2Bounce validation API, so verification becomes part of the conversation instead of a separate chore.

• Single address: a deliverability score out of 100, a status (valid, invalid, risky), and a sub-status explaining why: confirmed mailbox, catch-all domain, role-based address, or likely bounce.
• Bulk lists: up to 10,000 addresses per request, returned as a downloadable CSV.
• Long-running jobs: poll a job by tracking ID and pull results whenever they're ready, useful for auditing an old list or validating before a CRM import.
• Account status: confirm your API key is active and check your remaining credit balance, so you're never caught mid-campaign.

Install the server with one npm command, grab your API key from the No2Bounce dashboard, and add a short config block to Claude Desktop's settings file. Restart, and the connection is live. There's no server to host, no build step, nothing else to maintain. Your API key stays local the whole time, passed as a command-line argument and never transmitted to or stored by Anthropic.

From there, it's just conversation. Paste an address, paste a list, or ask about your account, and let Claude check it before you hit send.

The entire setup above (install the package, create the config file, add the correct entry, and verify it works) can be handed to Claude itself as a single prompt, no manual file editing required. Paste the prompt below, replace YOUR_API_KEY with your real token, and let Claude do the rest.

Install and set up the No2Bounce MCP server for me. Run "npm install -g no2bounce-mcp" globally, then locate my Claude Desktop config file for this OS (create it if it does not exist), and add a "no2bounce" entry under mcpServers using command "no2bounce-mcp" and args ["--api-key=YOUR_API_KEY"]. Show me the final config file content, then tell me to restart Claude Desktop and confirm the no2bounce tools are available.

This prompt is safe to reuse as-is for future MCP servers by swapping the package name, server name, and arguments, Claude will follow the same install → configure → verify pattern.

From there, it's just conversation. Paste an address, paste a list, or ask about your account, and let Claude check it before you hit send.

• Get your API key → https://app.no2bounce.com/api

Package Info

• View on npmx : https://npmx.dev/package/no2bounce-mcp
• Published by no2bounce-com on npm : https://www.npmjs.com/~no2bounce-com

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