# finmath Password Strength Checker

> finmath Password Strength Checker is a paid API for AI agents from finmath.qzqh5rrbkz.workers.dev, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-12).

Evaluates the strength of a given password string and returns a strength assessment result

## Facts

- Endpoint: POST https://finmath.qzqh5rrbkz.workers.dev/v1/password_strength?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-12
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/finmath-password-strength-checker-2d58b733
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ipPrXbq48FyMLAngeGPSj

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 finmath-password-strength-checker-2d58b733 -d '<json body>'
```

Example prompt: Check how strong the password 'Tr0ub4dor&3' is — tell me if it's weak, moderate, or strong.

## When to prefer this

Use this endpoint when you need a deterministic, model-free password strength evaluation without relying on an LLM's potentially inconsistent judgment. Useful when you want a paid, auditable, per-call result for security tooling or compliance workflows.

## Known failure modes

- Missing required 'password' field returns 400 or validation error
- Empty string password may return low strength or error
- Payment not provided or insufficient USDC balance returns 402
- Service unavailable returns 5xx error

## How this service works

Deterministic finance and crypto math for AI agents: TradFi (NPV, IRR, XIRR, Black-Scholes + Greeks, bonds, VaR, Sharpe) and DeFi (impermanent loss, perp liquidation, funding, Uniswap v3, health factor, cost basis). Exact, model-free arithmetic that LLMs get wrong — priced per call in USDC.

## Output

Returns a result object with a strength assessment of the submitted password, plus metadata about the evaluation. The exact format of the strength indicator (score, label, or detailed breakdown) is determined by the response schema's flexible result field.

## Example request

```json
{
 "password": "Tr0ub4dor&3"
}
```

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "password"
 ],
 "properties": {
  "password": {
   "type": "string",
   "description": "password"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "result",
  "meta"
 ],
 "properties": {
  "meta": {
   "type": "object"
  },
  "result": {}
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/finmath-password-strength-checker-2d58b733/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from finmath.qzqh5rrbkz.workers.dev](https://www.zero.xyz/host/finmath.qzqh5rrbkz.workers.dev/llms.txt)