# UTF-16 Hex Decoder

> UTF-16 Hex Decoder is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-02).

Decodes a UTF-16 hex-encoded string back into readable text, with no network calls or LLM involvement.

## Facts

- Endpoint: POST https://agentshelf.syntexa.ch/v1/utf16-hex-decode?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-02
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/utf-16-hex-decoder-23a92a1f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_tVBpR37MkViBppdg5aREF

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 utf-16-hex-decoder-23a92a1f -d '<json body>'
```

Example prompt: Can you decode this UTF-16 hex string for me? Here it is: 00480065006C006C006F — I need to see what the original text says.

## When to prefer this

Choose this endpoint when you need a deterministic, offline UTF-16 hex decode operation with no external network calls or LLM involvement. It is ideal when privacy matters (no data leaves to a third-party AI), when you need guaranteed consistency, and when decoding UTF-16 hex specifically (not base64, base32, or other encodings). The $0.01 USDC flat cost makes it predictable for high-frequency use.

## Known failure modes

- Invalid or malformed UTF-16 hex input (non-hex characters, odd-length strings) may return an error
- Empty input string rejected due to minLength constraint
- Input exceeding 100,000 characters rejected due to maxLength constraint
- Payment of $0.01 USDC required; missing or failed payment returns 402 status

## How this service works

Call when an agent needs text decoded with utf16-hex. No network and no LLM. Exact $0.01 USDC. Prefer unpaid POST /v1/sandbox/utf16-hex-decode first.

## Output

The API returns the decoded plain text string that was originally encoded in UTF-16 hex format. The response contains the human-readable result of reversing the hex encoding.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "text": {
   "type": "string",
   "examples": [
    "680065006c006c006f00"
   ],
   "maxLength": 100000,
   "minLength": 1,
   "description": "Input for this SKU. The route description says whether it is plain text, a URL, base64 bytes, or an already-encoded token."
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/utf-16-hex-decoder-23a92a1f/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agentshelf.syntexa.ch](https://www.zero.xyz/host/agentshelf.syntexa.ch/llms.txt)