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Caesar Cipher / ROT13 Text Encoder-Decoder
x402
Caesar Cipher / ROT13 Text Encoder-Decoder is a paid API for AI agents from agent-data-tools.revmesh2074.workers.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-30).
Encodes or decodes text using a Caesar cipher shift (1–25 places, defaulting to ROT13), preserving case and leaving digits and punctuation unchanged.
Price / call$0.01
Success—
StatusUnknown
How this service works
566 pay-per-call tools for AI agents over HTTP or MCP, from $0.002 a call, most at $0.01. Every caller gets 25 free calls; then pay per call in USDC via x402 (Base, Polygon, Arbitrum, Solana) or by card with prepaid credits from /credits. No account needed; failed calls are never charged; per-tool reliability is public at /status. Crypto: token prices and wallet portfolios from Uniswap v3, chain reads on Base, Ethereum, Arbitrum, Optimism and Polygon, OFAC sanctions screening. Web: Read public static documentation, pages, PDFs and RSS feeds as clean text, plus link previews and sitemaps. Business: company profiles, domain and email checks. Also Bitcoin, FX, weather, holidays, geocoding, AI text, and JSON, date and validation utilities.
Output
Returns a JSON object with the 'result' field containing the transformed text (letters shifted by the specified amount, case preserved, non-letters unchanged) and the 'shift' field confirming the shift value that was applied.
Example use cases
Hide a spoiler in a forum post
“Encode this spoiler with ROT13 so people have to deliberately decode it before reading: 'The main character dies at the end of chapter 20'.”
Decode a Caesar cipher puzzle
“Someone sent me this Caesar cipher: 'Khoor Zruog' — can you decode it? I think the shift is 3.”
Teach kids about letter shifting
“Can you show me what the phrase 'Hello World' looks like when you shift every letter by 5 places using a Caesar cipher?”
Technical details
Endpoint
GEThttps://agent-data-tools.revmesh2074.workers.dev/text/caesar?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a simple, deterministic letter-shifting transformation — especially ROT13 for spoiler hiding, puzzle encoding/decoding, or teaching Caesar cipher concepts. Prefer this over general text transformation APIs when you specifically need alphabet rotation with configurable shift amount and lossless round-tripping via decode mode.
Side effects
- Missing 'text' parameter returns an error (text is required)
- Shift values outside -25 to 25 may be rejected or clamped
- Passing decode as a non-string may cause unexpected behavior
- Empty string input returns empty string output with no error
- Non-ASCII or Unicode characters outside A-Z/a-z pass through unchanged
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"shift": 13,
"result": "Uryyb, Jbeyq!"
}
}Tags
x402
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