# Password Strength Checker

> Password Strength Checker is a paid API for AI agents from intel.rallylive.ca, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).

Estimates password strength by computing entropy, character class diversity, length, and common-pattern penalties, returning crack-time estimates and a verdict

## Facts

- Endpoint: GET https://intel.rallylive.ca/data/password-strength
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/password-strength-checker-a0f86c3d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_D8-pVfkYfBRjJjuPjtg6w

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability password-strength-checker-a0f86c3d
```

Example prompt: How strong is the password 'Tr0ub4dor&3'? Give me the entropy, crack time, and whether it would pass a security audit.

## When to prefer this

Choose this endpoint when you need a lightweight, privacy-preserving password strength check with detailed entropy analysis and crack-time estimation without storing any credentials. Ideal for developers building registration flows, security auditors evaluating password policies, or agents helping users pick stronger passwords. Nothing is logged, making it safe to pass real candidate passwords.

## Known failure modes

- Missing password query parameter returns an error
- Extremely long passwords may be truncated or rejected
- Non-string input types may cause a 400 error
- Network timeout on slow connections

## How this service works

Password strength estimate: entropy in bits, character classes used, length, common-pattern penalties (dictionary words, sequences, repeats, dates), an estimated crack time at 10 billion guesses per second and a verdict. Nothing is stored or logged. $0.01 per check.

## Output

Returns entropy in bits, a list of character classes used (uppercase, lowercase, digits, symbols), password length, penalties for detected patterns such as dictionary words, date sequences, repeating characters, an estimated crack time at 10 billion guesses per second, and an overall strength verdict. No data is stored or logged.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {}
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/password-strength-checker-a0f86c3d/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from intel.rallylive.ca](https://www.zero.xyz/host/intel.rallylive.ca/llms.txt)