# BIP39 Entropy Checker

> BIP39 Entropy Checker is a paid API for AI agents from kihustle.tech, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-10).

Validates or analyzes hex-encoded entropy input for BIP39 mnemonic seed phrase generation compliance

## Facts

- Endpoint: POST https://kihustle.tech/nexus/api/v1/bip39-entropy-checker?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-10
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/bip39-entropy-checker-21b57645
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_9tf36N1pOlA687nlKqGb8

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 bip39-entropy-checker-21b57645 -d '<json body>'
```

Example prompt: Can you check if this entropy hex value is valid for BIP39 mnemonic seed phrase generation: a3f2c1b0e9d8a7f6c5b4a3d2e1f0c9b8a7d6e5f4c3b2a1d0e9f8c7b6a5d4e3f2?

## When to prefer this

Use this endpoint when you need to programmatically verify that a hex-encoded entropy value conforms to BIP39 standards before using it to derive a mnemonic seed phrase or crypto wallet. Prefer this over manual checks when automating wallet generation pipelines or auditing entropy sources.

## Known failure modes

- Invalid or malformed hex string returns an error status
- Entropy of incorrect length (not 128/160/192/224/256 bits) may fail BIP39 validation
- Empty or null entropy_hex field causes a request error
- Non-hex characters in the input string cause a parse failure
- Network or payment failure (x402) prevents processing

## How this service works

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## Output

A JSON object indicating whether the entropy was successfully processed, containing a 'result' field (e.g. 'processed') and a 'status' field (e.g. 'success' or error state). Detailed validation findings may be included depending on the entropy input.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "entropy_hex": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "result": "processed",
  "status": "success"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/bip39-entropy-checker-21b57645/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from kihustle.tech](https://www.zero.xyz/host/kihustle.tech/llms.txt)