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AgentTools Text Diff (LCS Unified Diff)
x402
AgentTools Text Diff (LCS Unified Diff) is a paid API for AI agents from agentstoolshub.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-12).
Computes a deterministic line-by-line LCS diff between two texts and returns the result in unified-diff format with additions, removals, and context lines.
Price / call$0.005
Success—
StatusUnknown
How this service works
Compare two texts line by line using an LCS diff: exact additions, removals and context — in unified-diff style. Deterministic, unlike asking a model to 'find the differences'. Use this when an agent needs to exact line-level diff with unified-style output.
Output
Returns a unified-diff formatted string showing line-level changes between the two input texts: lines prefixed with '+' for additions, '-' for removals, and ' ' (space) for unchanged context lines, along with standard unified-diff hunk headers indicating line positions.
Example use cases
Code review change detection
“I have two versions of a Python function — the original and the refactored one. Can you compare them line by line and show me exactly which lines were added or removed, with 3 lines of context? Original: 'def add(a, b):
return a + b' and new: 'def add(a, b, c=0):
"""Add two or three numbers."""
return a + b + c'”
Config file drift audit
“These are two versions of our nginx.conf — before and after a deployment. Diff them line by line in unified format with 1 line of context so I can see exactly what the ops team changed: before: 'worker_processes 1;
events {}
http { listen 80; }' and after: 'worker_processes 4;
events { multi_accept on; }
http { listen 443 ssl; }'”
Document revision tracking
“Compare these two drafts of our press release and tell me exactly which lines were added and which were removed — no guessing, I need the precise line-level diff. Draft 1: 'We are excited to announce our new product.
It launches in Q3.
Contact us at info@company.com.' Draft 2: 'We are thrilled to announce our flagship product.
It launches in Q2 2025.
Visit our website for details.'”
Technical details
Endpoint
GEThttps://agentstoolshub.com/api/v1/dev/diff?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a deterministic, exact line-level diff in standard unified-diff format — particularly when you cannot rely on a language model to accurately enumerate every changed line. Ideal for comparing code, configuration files, structured text, or any content where precision and reproducibility matter. Prefer this over asking a model directly when the texts are long, changes are subtle, or auditability is required.
Side effects
- Missing required parameters 'a' or 'b' returns an error
- Extremely large text inputs may be truncated or time out
- Non-text or binary content passed as strings may produce garbled output
- Invalid context value (non-numeric) may cause a bad request error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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