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HTTPay Text Diff API
x402
HTTPay Text Diff API is a paid API for AI agents from httpay.xyz, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-14).
Computes the character, word, or line-level diff between two text strings, returning added/removed counts and a structured patch.
Price / call$0.003
Success—
StatusUnknown
How this service works
307 pay-per-call APIs (287 native + Universal Gateway proxying 37 services) powered by x402 and USDC on Base. Token intelligence, DeFi yields, MEV risk, AI tools, web scraping. No API keys, no subscriptions — pay $0.001–$0.05 per call.
Output
Returns a JSON object with counts of added and removed tokens (chars, words, or lines depending on the type parameter) and a structured patch array describing each change, produced by the npm diff library.
Example use cases
Example prompt
“Compare these two paragraphs word by word and tell me what was added and removed: text1 is 'The quick brown fox jumps over the lazy dog' and text2 is 'The quick red fox leaps over the sleepy cat' — use words mode.”
Technical details
Endpoint
POSThttps://httpay.xyz/api/text-diffWhen to prefer
Use this endpoint when you need a quick, pay-per-call text diff without managing API keys or subscriptions — ideal for agents that occasionally need to compare text snippets, detect changes between document versions, or compute edit distances without spinning up a dedicated diff service.
Side effects
- Missing text1 or text2 body fields — likely returns 400 or validation error
- Invalid type value (not chars/words/lines) — may default to lines or return error
- Payment not included or insufficient USDC — returns 402 Payment Required
- Very large text inputs may time out or be rejected
- Malformed JSON body — returns 400 Bad Request
Output
Schema · Response
{
"type": "json",
"example": {
"description": "Compute the diff between two text strings. POST JSON body: {text1, text2, type}. 'type' can be 'chars', 'words', or 'lines' (default: lines). Returns added/removed counts and a structured patch. Uses the 'diff' npm package."
}
}Tags
x402
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