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Diff Lines Text Comparison Tool
x402
Diff Lines Text Comparison Tool is a paid API for AI agents from gpt55.558686.xyz, paid per call via x402, $0.0001/call, status unknown (last checked 2026-09-15).
Compares two multi-line text strings line-by-line and returns a diff summary, paid via x402 USDC microtransaction.
Price / call$0.0001
Success—
StatusUnknown
How this service works
Compare two newline-separated text blocks and return added, removed, and unchanged line sets without calling an upstream model. Pay up to $0.001 per request with x402 USDC on Base. Public paid calls are limited to 1500 input characters and 128 output tokens.
Output
A JSON object with ok: true, tool: 'diffLines', and a summary describing the line-level differences between the before and after text inputs. Identifies added, removed, and unchanged lines.
Example use cases
Spot changes in release notes
“I have two versions of our release notes — can you diff them line by line and tell me exactly what lines were added or removed? Before: 'Version 1.0
Fixed login bug
Improved performance' and after: 'Version 1.1
Fixed login bug
Added dark mode
Improved performance
Removed legacy API'.”
Review edited legal clause
“My lawyer sent back a revised contract clause — compare the original and the edited version line by line so I can see what they changed. Original: 'Payment is due within 30 days.
Late fees apply after 30 days.
Disputes must be filed within 90 days.' and revised: 'Payment is due within 15 days.
Late fees apply after 15 days.
Disputes must be filed within 60 days.
All disputes are subject to arbitration.'”
Track environment variable updates
“We updated our .env file before deploying to staging — diff these two versions line by line and highlight what was added or removed. Before: 'DB_HOST=localhost
DB_PORT=5432
API_KEY=dev123
DEBUG=true' and after: 'DB_HOST=staging.db.internal
DB_PORT=5432
API_KEY=stg456
DEBUG=false
LOG_LEVEL=verbose'.”
Technical details
Endpoint
GEThttps://gpt55.558686.xyz/v1/tools/diff-linesWhen to prefer
Use this endpoint when you need a quick, pay-per-use line-by-line text diff without a subscription, especially when integrating into an agent workflow that already supports x402 USDC micropayments on Base. Prefer this over general-purpose LLM prompts for structured diff output.
Side effects
- Missing 'before' or 'after' query parameter returns an error
- Text inputs exceeding 50,000 characters are rejected
- Payment failure via x402 USDC results in 402 response and no result
- Invalid query parameter types may cause schema validation errors
- Network or gateway timeout for very large diffs
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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