SignupBouncer MCP

An official MCP server provided by SignupBouncer that allows AI agents to verify email addresses and IP addresses against disposable or burner domains. It provides tools to check emails, explain rejection reasons, lookup burner domains, and retrieve integration guides for various tech stacks without requiring an API key for read-only operations.

Endpoint and access

No sign-in: your client connects and lists tools immediately, with no account or key.

No sign-inEndpoint checked 2026-10-18Operated by SignupBouncer

MCP endpoint (Streamable HTTP)

https://signupbouncer.com/mcp

Vendor documentation

What you can do with it

Check if an email address is disposable or suspicious
Explain specific reason codes for blocked signups
Lookup if a domain is on the burner list
Retrieve integration code for specific tech stacks

Tools advertised by the last live check:

check_email
explain_reason
lookup_burner_domain
integration_guide
get_rules
update_rules

Connect from your client

Each snippet registers the same endpoint; pick the client you use.

This server is operated by the named third party. Listing and endpoint checks are not an endorsement or a security audit. Review the operator's permissions, terms, and data handling before connecting. How listings are checked and corrected.

Claude Code

Run this once in a terminal. It registers a Streamable HTTP server. Use --scope project to write .mcp.json for the repo.

Claude Code configuration

claude mcp add --transport http signupbouncer-mcp https://signupbouncer.com/mcp

Codex

Run this once. Codex stores MCP servers in ~/.codex/config.toml (or .codex/config.toml in a trusted project).

Codex configuration

codex mcp add signupbouncer-mcp --url https://signupbouncer.com/mcp

Cursor

Merge this server into .cursor/mcp.json in your project, then enable signupbouncer-mcp in your MCP settings.

Cursor configuration

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

Cline

Merge this into cline_mcp_settings.json (Cline → MCP Servers → Configure). The type must be streamableHttp for a remote HTTP server.

Cline configuration

{
  "mcpServers": {
    "signupbouncer-mcp": {
      "type": "streamableHttp",
      "url": "https://signupbouncer.com/mcp",
      "disabled": false
    }
  }
}

VS Code

Merge this server into .vscode/mcp.json. Use MCP: List Servers to start signupbouncer-mcp and inspect its tools.

VS Code configuration

{
  "servers": {
    "signupbouncer-mcp": {
      "type": "http",
      "url": "https://signupbouncer.com/mcp"
    }
  }
}

Gemini CLI

Run this once. It writes .gemini/settings.json in the current project; pass --scope user for ~/.gemini/settings.json.

Gemini CLI configuration

gemini mcp add --transport http signupbouncer-mcp https://signupbouncer.com/mcp

Claude Desktop

Merge this into claude_desktop_config.json (macOS: ~/Library/Application Support/Claude/, Windows: %APPDATA%\Claude\), then restart Claude Desktop.

Claude Desktop configuration

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

Windsurf

Merge this into ~/.codeium/windsurf/mcp_config.json, then refresh MCP in Cascade. Windsurf remote servers use serverUrl, not url.

Windsurf configuration

{
  "mcpServers": {
    "signupbouncer-mcp": {
      "serverUrl": "https://signupbouncer.com/mcp"
    }
  }
}

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