captcha.cc Human Verification is an MCP server with 3 tools an agent can call, among them create_challenge, make_siteverify_request, make_widget_snippet. It answers at https://captcha.cc/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 10 of 10 times since 4 September 2026; the last check, on 17 October 2026, succeeded.
Human verification CAPTCHA with visual and selective-listening audio challenges.
Description as the publisher wrote it.
| Tool | What it does |
|---|---|
create_challenge | Create a live captcha.cc challenge for a site key and allowed hostname. Useful for smoke tests and integration checks. Inputs: site_key, hostname |
make_siteverify_request | Return a server-side fetch example for redeeming a captcha.cc proof token exactly once. Inputs: secret_env_var, proof_token_expression |
make_widget_snippet | Return a minimal browser SDK snippet for mounting captcha.cc and submitting the proof token to an application endpoint. Inputs: site_key, element_id, form_id, submit_path |
Every block below points at https://captcha.cc/mcp. Pick your client and copy.
claude mcp add --transport http captcha-cc-human-verification https://captcha.cc/mcp
{
"mcpServers": {
"captcha-cc-human-verification": {
"command": "npx",
"args": ["-y", "mcp-remote", "https://captcha.cc/mcp"]
}
}
}{
"mcpServers": {
"captcha-cc-human-verification": {
"url": "https://captcha.cc/mcp"
}
}
}{
"servers": {
"captcha-cc-human-verification": {
"type": "http",
"url": "https://captcha.cc/mcp"
}
}
}{
"context_servers": {
"captcha-cc-human-verification": {
"url": "https://captcha.cc/mcp"
}
}
}{
"mcpServers": {
"captcha-cc-human-verification": {
"serverUrl": "https://captcha.cc/mcp"
}
}
}{
"mcpServers": {
"captcha-cc-human-verification": {
"url": "https://captcha.cc/mcp"
}
}
}name: captcha.cc Human Verification
version: 0.0.1
schema: v1
mcpServers:
- name: captcha.cc Human Verification
type: streamable-http
url: https://captcha.cc/mcp{
"mcpServers": {
"captcha-cc-human-verification": {
"httpUrl": "https://captcha.cc/mcp"
}
}
}{
"mcpServers": {
"captcha-cc-human-verification": {
"type": "http",
"url": "https://captcha.cc/mcp"
}
}
}{
"mcpServers": {
"captcha-cc-human-verification": {
"url": "https://captcha.cc/mcp"
}
}
}goose://extension?url=https%3A%2F%2Fcaptcha.cc%2Fmcp&type=streamable_http&id=captcha-cc-human-verification&name=captcha.cc%20Human%20Verification
It answered our last check on 17 October 2026 in 220 ms. Over 10 checks since 4 September 2026 it answered 10. Status here comes from Neuronto's own probes, not from the publisher.
Yes. It is published by captcha.cc and served from captcha.cc, the vendor's own domain: https://captcha.cc/mcp.
3, as returned by the server's own tools/list on 9 September 2026: create_challenge, make_siteverify_request, make_widget_snippet.
It answered our last check on 17 October 2026 in 220 ms. Over 10 checks since 4 September 2026 it answered 10.
Put the server under mcpServers in ~/.cursor/mcp.json with the URL https://captcha.cc/mcp. The exact JSON is above, with the same setup for Claude Code, Claude Desktop, VS Code, Windsurf, Zed, Gemini CLI and the rest.
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.
Publisher: cc.captcha. Endpoint host: captcha.cc. ARD identifier: urn:air:cc.captcha:mcp:captchacc.
First indexed 31 August 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.