Regex Explainer MCP server

Regex Explainer is a remote MCP server that gives an AI agent 1 tool, among them explain_regex. It answers at https://regex-explainer.gumballtools.com/api/mcp over streamable HTTP, and it listed its tools to an anonymous client, so no sign-in was needed for that. Our probes reached it 9 of 9 times since 5 September 2026; the last check, on 17 October 2026, succeeded.

Explain a regex in plain English and detect catastrophic backtracking risk.

Description as the publisher wrote it.

The 1 tool Regex Explainer offers

Add Regex Explainer to your AI client

Every block below points at https://regex-explainer.gumballtools.com/api/mcp. Pick your client and copy.

claude mcp add --transport http regex-explainer https://regex-explainer.gumballtools.com/api/mcp

{
  "mcpServers": {
    "regex-explainer": {
      "command": "npx",
      "args": ["-y", "mcp-remote", "https://regex-explainer.gumballtools.com/api/mcp"]
    }
  }
}

{
  "mcpServers": {
    "regex-explainer": {
      "url": "https://regex-explainer.gumballtools.com/api/mcp"
    }
  }
}

{
  "servers": {
    "regex-explainer": {
      "type": "http",
      "url": "https://regex-explainer.gumballtools.com/api/mcp"
    }
  }
}

{
  "context_servers": {
    "regex-explainer": {
      "url": "https://regex-explainer.gumballtools.com/api/mcp"
    }
  }
}

{
  "mcpServers": {
    "regex-explainer": {
      "serverUrl": "https://regex-explainer.gumballtools.com/api/mcp"
    }
  }
}

{
  "mcpServers": {
    "regex-explainer": {
      "url": "https://regex-explainer.gumballtools.com/api/mcp"
    }
  }
}

name: Regex Explainer
version: 0.0.1
schema: v1
mcpServers:
  - name: Regex Explainer
    type: streamable-http
    url: https://regex-explainer.gumballtools.com/api/mcp

{
  "mcpServers": {
    "regex-explainer": {
      "httpUrl": "https://regex-explainer.gumballtools.com/api/mcp"
    }
  }
}

{
  "mcpServers": {
    "regex-explainer": {
      "type": "http",
      "url": "https://regex-explainer.gumballtools.com/api/mcp"
    }
  }
}

{
  "mcpServers": {
    "regex-explainer": {
      "url": "https://regex-explainer.gumballtools.com/api/mcp"
    }
  }
}

goose://extension?url=https%3A%2F%2Fregex-explainer.gumballtools.com%2Fapi%2Fmcp&type=streamable_http&id=regex-explainer&name=Regex%20Explainer

Is Regex Explainer up right now?

It answered our last check on 17 October 2026 in 821 ms. Over 9 checks since 5 September 2026 it answered 9. Status here comes from Neuronto's own probes, not from the publisher.

MCP servers similar to Regex Explainer

Questions about Regex Explainer

Is there an official Regex Explainer MCP server?

Yes. It is published by gumballtools.com and served from regex-explainer.gumballtools.com, the vendor's own domain: https://regex-explainer.gumballtools.com/api/mcp.

How many tools does Regex Explainer have?

1, as returned by the server's own tools/list on 5 September 2026: explain_regex.

Is Regex Explainer down?

It answered our last check on 17 October 2026 in 821 ms. Over 9 checks since 5 September 2026 it answered 9.

How do I add Regex Explainer to Cursor?

Put the server under mcpServers in ~/.cursor/mcp.json with the URL https://regex-explainer.gumballtools.com/api/mcp. The exact JSON is above, with the same setup for Claude Code, Claude Desktop, VS Code, Windsurf, Zed, Gemini CLI and the rest.

Does Regex Explainer need an API key?

It listed its tools to an anonymous client, so reading the tool list needs no key. Individual tools can still ask for credentials in their own inputs.

Where this comes from

Publisher: com.gumballtools. Endpoint host: regex-explainer.gumballtools.com. ARD identifier: urn:air:com.gumballtools:mcp:regex-explainer. First indexed 5 September 2026. The tools are exactly what the server returned; nothing on this page is inferred from its name. Ranking in Neuronto search is never for sale.