Captcha.Cc Human Verification
cc.captcha/captchacc is a MCP server that connects agents to captcha.cc visual and selective-listening audio human verification.
About
cc.captcha/captchacc is a Model Context Protocol server for captcha.cc human verification, offering visual CAPTCHA and selective-listening audio challenges. SaaS founders use it during ship and security hardening when they need agents to help prototype, test, or orchestrate verification flows without building CAPTCHA logic from scratch. Register the streamable-http remote at captcha.cc/mcp in Claude Code, Cursor, or another MCP client, and follow the publisher MCP docs for tool invocation patterns. The server focuses on proving humanness—not login, WAF rules, or rate limiting—so combine it with your existing auth and monitoring. Audio selective-listening modes matter for accessibility-aware products and for reducing friction compared with purely visual puzzles when you launch public endpoints.
- Human verification via captcha.cc with visual challenge support
- Selective-listening audio challenges for accessibility-oriented verification
- Hosted streamable-http MCP remote at https://captcha.cc/mcp
- Documented integration path at captcha.cc/docs/mcp
- Open-source repository github.com/earonesty/captcha; MCP version 1.0.0
Captcha.Cc Human Verification by the numbers
- Exposes 3 verified tools (MCP introspection)
- Data as of Jul 7, 2026 (Skillselion catalog sync)
claude mcp add --transport http captchacc https://captcha.cc/mcpAdd your badge
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| Transport | HTTP |
|---|---|
| Auth | None |
| Tools | 3 |
What it does
Wire captcha.cc human verification into your agent workflow so you can issue visual or selective-listening audio CAPTCHA challenges before risky or public-facing actions ship.
Who is it for?
Best when you're shipping forms, signups, or agent-mediated public actions and want captcha.cc via MCP instead of custom bot checks.
Skip if: Products that already use enterprise WAF bot management only, or teams that cannot use third-party CAPTCHA services.
What you get
After registering the captcha.cc MCP remote, your agent can drive standardized human verification challenges during build-out and pre-launch security checks.
- Agent-invokable visual and audio human verification via captcha.cc
- Faster iteration on anti-bot UX before production traffic
- Documented remote MCP endpoint for repeatable security testing
By the numbers
- MCP server version 1.0.0
- Remote MCP URL https://captcha.cc/mcp
- Two challenge families advertised: visual and selective-listening audio
Tools 3
Public tool metadata - what this server can do for an agent.
make_widget_snippet4 paramsReturn a minimal browser SDK snippet for mounting captcha.cc and submitting the proof token to an application endpoint.
site_keystringrequiredPublic captcha.cc site key, for example pk_live_xxx.element_idstringDOM element id where the widget should mount.form_idstringForm id to attach submit handling to.submit_pathstringApplication endpoint that receives the proof token.
make_siteverify_request2 paramsReturn a server-side fetch example for redeeming a captcha.cc proof token exactly once.
secret_env_varstringproof_token_expressionstring
create_challenge2 paramsCreate a live captcha.cc challenge for a site key and allowed hostname. Useful for smoke tests and integration checks.
site_keystringrequiredPublic captcha.cc site key.hostnamestringrequiredHostname configured on the captcha.cc site.
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MCP bridge to a hosted CAPTCHA provider, not a full fraud analytics platform or OAuth skill.
FAQ
Who is cc.captcha/captchacc for?
Independent developers and small teams shipping web or API products who need captcha.cc verification callable from MCP-enabled coding agents.
When should I use cc.captcha/captchacc?
Use it while hardening ship-ready endpoints—signups, comments, trials, or workflows agents test—before you scale distribution.
How do I add cc.captcha/captchacc to my agent?
Add the streamable-http remote https://captcha.cc/mcp in your MCP client, review https://captcha.cc/docs/mcp for credentials or usage limits, then call verification tools from your agent session.