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Saylor Innovations Text Diff
x402
Saylor Innovations Text Diff is a paid API for AI agents from saylorinnovations.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-30).
Returns line-by-line differences between two texts, including added, removed, and unchanged line counts and a similarity score
Price / call$0.01
Success—
StatusUnknown
How this service works
Text diff - line-by-line differences between two texts with added, removed and unchanged counts and similarity
Output
Returns a JSON object with an array of line-level changes (each with line number, type, and line references for both texts), boolean flags for whether the texts are identical and whether the result was truncated, a similarity score (0–1), and counts of lines added, removed, and unchanged. Also includes a checked_at timestamp.
Example use cases
Detect edits in a revised document
“I have two versions of a policy document — the original and the updated one. Can you do a line-by-line diff and tell me exactly which lines were added or removed, how many changed overall, and how similar the two versions are?”
Code review change detection
“Compare these two versions of a Python function for me and show me what lines were added, removed, or stayed the same, plus give me a similarity percentage between the two.”
Plagiarism and paraphrase check
“I want to know how similar these two paragraphs are — can you diff them line by line and tell me the similarity score and whether any lines are identical?”
Technical details
Endpoint
GEThttps://saylorinnovations.com/api/tools/diff?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a structured, machine-readable line-by-line diff with similarity scoring between two plain text inputs — ideal for agents that need to programmatically detect what changed between document versions, code snippets, or any two strings without spinning up a local diff library. Prefer this over general text comparison when you need explicit counts of added/removed/unchanged lines and a numeric similarity score returned as JSON.
Side effects
- Missing required query parameters 'a' or 'b' returns an error
- Texts exceeding 300 lines each may be truncated (truncated: true in response)
- Empty string inputs may return identical:true with zero changes
- Very long lines may affect processing or response size
- Payment failure or insufficient USDC balance returns 402
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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