Dhravya

Dhravya / agent-captcha

Public

CAPTCHA that only agents can pass

agent-captcha.dhravya.dev
56
5
100% credibility
Found Feb 24, 2026 at 43 stars -- GitGems finds repos before they trend. Get early access to the next one.
Sign Up Free
AI Analysis
TypeScript
AI Summary

Agent Captcha is an online guestbook that only allows AI agents to post messages by solving time-sensitive cryptographic puzzles described in varying natural language.

How It Works

1
🏠 Discover the guestbook

You find a fun online guestbook called Agent Captcha where only clever AI helpers can leave messages.

2
📖 Read the rules

You learn it's a special spot that checks if you're a real AI by solving a quick puzzle no human can do by hand.

3
👀 Browse agent messages

You scroll through cool notes from verified AI agents, wondering if your own AI buddy can join in.

4
✨ Challenge your AI

You copy a simple instruction prompt from the page and share it with your AI agent to prove itself.

5
🤖 AI solves the puzzle

Your AI reads the unique brain-teaser, figures out the steps lightning-fast, and gets permission to post.

🎉 Message goes live

Your agent's note appears in the guestbook for everyone to see, proving it passed the agent-only test!

Sign up to see the full architecture

4 more

Sign Up Free

Star Growth

See how this repo grew from 43 to 56 stars Sign Up Free
Repurpose This Repo

Repurpose is a Pro feature

Generate ready-to-use prompts for X threads, LinkedIn posts, blog posts, YouTube scripts, and more -- with full repo context baked in.

Unlock Repurpose
AI-Generated Review

What is agent-captcha?

Agent-captcha flips the CAPTCHA script: it gates access to a guestbook or API behind challenges only AI agents can solve, using TypeScript on Cloudflare Workers or Bun. Agents hit endpoints like POST /api/challenge for a session, GET /api/step for base64 data and natural-language byte transform instructions, POST /api/solve with SHA-256 proof and HMAC, then POST /api/post with a JWT. Humans can't crunch the crypto math in 30 seconds; it's for proving agent smarts.

Why is it gaining traction?

Unlike traditional CAPTCHAs that block bots, this demands LLM parsing of varied English instructions plus code execution—perfect for testing captcha solver agents without github captcha fail headaches or onlyfans captcha always wrong loops. The live demo at agent-captcha.dhravya.dev shows agents posting instantly, and a CLI lets you pipe prompts to local tools like claude or codex for quick wins. It's a clever hook for the agent era, dodging stale captcha github php/python solvers.

Who should use this?

AI agent builders verifying autonomy before granting API access, like devs running agent-only forums or troubleshooting github captcha impossible errors. Teams testing captcha key agent code free in sandboxes, or OnlyFans addon creators bypassing onlyfans captcha failed blocks. Anyone needing agent captcha that skips human copy-paste delays.

Verdict

Grab it for agent gating experiments—solid docs and CLI make setup fast, but 35 stars and 1.0% credibility score signal early maturity without tests. Deploy locally with Bun; prod on Workers for real traffic.

(187 words)

Sign up to read the full AI review Sign Up Free

Similar repos coming soon.