# PennyRail URL Decode / Percent Decode

> PennyRail URL Decode / Percent Decode is a paid API for AI agents from pennyrail.vercel.app, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-14).

Decodes a percent-encoded (URL-encoded) string back into its original, human-readable form

## Facts

- Endpoint: POST https://pennyrail.vercel.app/api/p/nano/encoding.url-decode--percent-decode
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/pennyrail-url-decode-percent-decode-49f96f6a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_TW0BQoATDHsifIVwqQTr9

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 pennyrail-url-decode-percent-decode-49f96f6a -d '<json body>'
```

Example prompt: Can you URL-decode this string for me: 'Hello%2C%20World%21%20How%27s%20it%20going%3F' — I need the plain readable text back.

## When to prefer this

Choose this endpoint when you need a simple, pay-per-call percent/URL decoding operation without setting up server infrastructure. Ideal for agents that only occasionally need URL decoding as part of a larger workflow, or when running in environments where a native decode function is unavailable.

## Known failure modes

- Malformed percent sequences (e.g. incomplete %2) may cause decoding errors or partial results
- Input that is not actually percent-encoded may be returned as-is or produce unexpected output
- Overly long strings may hit payload size limits
- Missing required 'input' field returns a validation error

## How this service works

Machine-readable settlement service

## Output

A decoded plain-text string with all percent-encoded sequences (e.g. %20, %2F, %3D) converted back to their original characters, returned as a JSON object.

## Request schema (JSON Schema)

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

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "additionalProperties": true
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/pennyrail-url-decode-percent-decode-49f96f6a/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from pennyrail.vercel.app](https://www.zero.xyz/host/pennyrail.vercel.app/llms.txt)