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PennyRail Text Reversal
x402
PennyRail Text Reversal 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).
Reverses the characters of an input string, returning it backwards
Price / call$0.001
Success—
StatusUnknown
How this service works
Machine-readable settlement service
Output
Returns an object containing the reversed version of the input string, with all characters in reverse order from the original.
Example use cases
Reverse a word for a puzzle
“Take the word 'enigma' and give me it spelled completely backwards — every letter reversed.”
Flip a phrase for a game
“I need the phrase 'the quick brown fox' reversed character by character for a word game I'm building.”
Check palindrome candidate
“Reverse the string 'racecar' for me so I can compare it to the original and see if it's a palindrome.”
Technical details
Endpoint
POSThttps://pennyrail.vercel.app/api/p/nano/text.reverse--string-backwardsWhen to prefer
Use this endpoint when you need a simple, reliable, pay-per-call string reversal without deploying your own infrastructure. Ideal for agents that occasionally need text reversal as a micro-utility and want to avoid maintaining custom code. Not appropriate for bulk/batch processing of many strings at once due to per-call cost.
Side effects
- Missing 'input' field returns a validation error
- Non-string input may cause a type error
- Empty string input may return empty string or an error
- Payment failure (402) if USDC balance is insufficient or x402 header is missing
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | string |
Output
Schema · Response
{
"type": "object",
"additionalProperties": true
}Tags
x402
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