# Regex Explainer (Plain English)

> Regex Explainer (Plain English) is a paid API for AI agents from dev-5090-box.tailfb4c1f.ts.net, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-12).

Takes a raw regex pattern and returns a plain-English explanation of what it matches and how it works.

## Facts

- Endpoint: POST https://dev-5090-box.tailfb4c1f.ts.net/v1/regex-explain?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-12
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/regex-explainer-plain-english-690bea7d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_u3TUfZBIKZ2KPupR1w0WY

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 regex-explainer-plain-english-690bea7d -d '<json body>'
```

Example prompt: Can you explain what this regex does in plain English: ^(?=.*[A-Z])(?=.*\d)[A-Za-z\d]{8,}$?

## When to prefer this

Choose this endpoint when a developer or agent needs a human-readable explanation of an existing regex pattern — especially for onboarding, code review, or debugging. Prefer it over general-purpose LLM chat when you want a focused, cost-effective single-call explanation without conversational overhead. Ideal when you already have the regex string and just need it decoded.

## Known failure modes

- Empty or missing regex pattern in message content returns an error or unhelpful response
- Extremely complex or malformed regex may produce an incomplete explanation
- Network timeout if the local RTX 5090 inference server is under load
- Non-regex input (e.g. plain text) may be processed but produce a nonsensical explanation

## How this service works

Explain a regex in plain English. Paste the regex in message content.

## Output

A plain-English narrative explaining what the regex pattern matches, how each component or group works, and what inputs would or would not satisfy it.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "usage": {
   "type": "object"
  },
  "choices": {
   "type": "array"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/regex-explainer-plain-english-690bea7d/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from dev-5090-box.tailfb4c1f.ts.net](https://www.zero.xyz/host/dev-5090-box.tailfb4c1f.ts.net/llms.txt)