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PennyRail ROT13 Text Encoder
x402
PennyRail ROT13 Text Encoder 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).
Applies ROT13 Caesar cipher transformation to an input string, shifting each letter by 13 positions
Price / call$0.001
Success—
StatusUnknown
How this service works
Machine-readable settlement service
Output
Returns a JSON object containing the ROT13-transformed version of the input string, where every alphabetical character is shifted 13 positions in the alphabet and non-alphabetical characters are left unchanged.
Example use cases
Obfuscate spoiler text
“Apply ROT13 to this spoiler so I can share it without ruining the ending: 'The butler did it and escaped to Argentina'.”
Decode ROT13 forum post
“Someone posted this ROT13 message and I need to read it — can you decode it? 'Gur ohgyre qvq vg naq rfpncrq gb Nethagvan'”
Encode puzzle answer
“I'm building a puzzle where the answer is 'OpenSesame42' — can you ROT13 encode it so I can hide it in the source code?”
Technical details
Endpoint
POSThttps://pennyrail.vercel.app/api/p/nano/text.rot13--rot13When to prefer
Choose this endpoint when you need a quick, pay-per-use ROT13 transformation without hosting your own cipher logic, especially in x402-enabled micropayment workflows where cost accountability per operation matters. It is idempotent and self-inverse, making it suitable for both encoding and decoding in a single endpoint.
Side effects
- Missing required 'input' field returns a validation error
- Non-string input type may cause a 400 or processing error
- Payment failure (x402) if USDC allowance is insufficient — returns 402 Payment Required
- Empty string input may return an empty or trivially encoded result
- Network timeout on the Vercel serverless function under cold-start conditions
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | string |
Output
Schema · Response
{
"type": "object",
"additionalProperties": true
}Tags
x402
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