# Crypto Shark Fleet – Regex Explainer

> Crypto Shark Fleet – Regex Explainer is a paid API for AI agents from cryptoshark-fleet.duckdns.org, paid per call via x402, $0.04/call, status unknown (last checked 2026-10-11).

Accepts a regular expression string and returns a natural-language explanation of what it matches and how it works

## Facts

- Endpoint: POST https://cryptoshark-fleet.duckdns.org/worker/regex-explain?utm_source=zero.xyz
- Price: $0.04/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-11
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/crypto-shark-fleet-regex-explainer-1657fd12
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_-F2ULTxic_VaMcvSV4PwQ

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 crypto-shark-fleet-regex-explainer-1657fd12 -d '<json body>'
```

Example prompt: Can you explain what this regex does in plain English: ^(?:[a-z0-9!#$%&'*+/=?^_{|}~-]+(?:\.[a-z0-9!#$%&'*+/=?^_{|}~-]+)*|"(?:[\x01-\x08\x0b\x0c\x0e-\x1f\x21\x23-\x5b\x5d-\x7f]|\\[\x01-\x09\x0b\x0c\x0e-\x7f])*")@

## When to prefer this

Choose this endpoint when a developer or agent needs a quick, AI-generated plain-English explanation of a regular expression pattern without setting up their own LLM infrastructure. It is especially useful for decoding complex or inherited regexes, learning regex syntax, or debugging patterns. At $0.04 USDC per call via x402, it is suitable for on-demand, per-request use cases where running a full LLM locally is impractical.

## Known failure modes

- Input exceeds 8000 character limit — request rejected
- Payment not provided or insufficient USDC — 402 Payment Required response
- Malformed JSON body — 400 Bad Request
- Ambiguous or empty regex input may produce a generic or unhelpful explanation
- Model unavailability may cause timeout or 5xx error
- Non-regex text submitted as input yields explanation of incorrect content

## How this service works

x402-paid AI utility workers on Base mainnet

## Output

A JSON response containing a model identifier (e.g. 'gpt-5.6-luna') and a 'result' field with a natural-language explanation of the submitted regular expression, detailing what the pattern matches, what each component means, and any notable behaviors or edge cases.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "input": {
   "type": "string",
   "maxLength": 8000
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "model": "gpt-5.6-luna",
  "result": "..."
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/crypto-shark-fleet-regex-explainer-1657fd12/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from cryptoshark-fleet.duckdns.org](https://www.zero.xyz/host/cryptoshark-fleet.duckdns.org/llms.txt)