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Caesar Cipher (Educational)
x402
Caesar Cipher (Educational) is a paid API for AI agents from api.delx.ai, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-13).
Applies a Caesar shift cipher to input text, shifting each alphabetic character by a specified integer amount, for use in puzzles, CTF challenges, or toy encoding scenarios.
Price / call$0.001
Success—
StatusUnknown
How this service works
Caesar shift cipher. Handy for puzzle agents, CTF helpers, or reversible toy encoding—not for secrets. Returns shifted text; educational cipher only, not cryptographic protection. $0.001 USDC per successful call via x402 on Base—deterministic first-party JSON, no API key, no subscription, and nothing is billed on structured validation errors.
Output
Returns a JSON object containing the shifted/transformed text after applying the Caesar cipher with the specified shift amount to all alphabetic characters in the input.
Example use cases
CTF challenge cipher decode
“I found this encoded CTF flag 'Uryyb PGS' — can you decode it using a Caesar cipher with a shift of 13?”
Puzzle message encoding
“Encode the message 'Meet me at the park at noon' using a Caesar cipher with a shift of 5 for a scavenger hunt clue.”
Educational cipher demonstration
“Show me how a Caesar cipher works by shifting the text 'The quick brown fox' by 3 positions.”
Technical details
Endpoint
POSThttps://api.delx.ai/api/v1/x402/caesar-cipherWhen to prefer
Choose this endpoint when you need a quick, deterministic, no-setup Caesar cipher transformation for puzzles, CTF competitions, educational demos, or reversible toy encoding. It requires no API key or subscription, charges only $0.001 USDC per successful call via x402 on Base, and returns first-party JSON. Prefer it over rolling your own cipher logic in an agent when you want a reliable, stateless, pay-per-use text shift operation.
Side effects
- Text exceeds 100,000 character limit — validation error returned, no charge
- Shift value is not an integer — validation error, no charge
- Missing required text field — structured validation error, no charge
- Network timeout or service unavailability — HTTP 5xx error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| text | string | Primary text input (max 100k chars). Processed first-party; not retained as a dataset. |
| shift | integer | Optional Caesar cipher shift amount (integer). Default applied by the handler when omitted. |
Output
Schema · Response
{
"type": "json",
"example": {
"text": "uryyb ntrag jbeyq",
"shift": 13,
"schema": "delx/caesar-cipher/v1"
}
}Tags
x402
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