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JSON Array Diff
x402
JSON Array Diff is a paid API for AI agents from x402-services-production.up.railway.app, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-15).
Computes the difference between two JSON arrays, returning a structured diff of their contents
Price / call$0.003
Success—
StatusUnknown
How this service works
Structured deep diff of two JSON values (added/removed/changed by path). Send { a, b }.
Output
A structured diff indicating which elements were added, removed, or changed between the two input JSON arrays, enabling the caller to understand exactly what changed from array A to array B.
Example use cases
Detect config changes between deployments
“I have two versions of my config array — the old one is ["featureA","featureB","featureC"] and the new one is ["featureA","featureC","featureD"] — can you diff them and tell me what was added or removed?”
Track list membership changes over time
“Here are yesterday's active user IDs as an array and today's active user IDs as an array — diff them so I can see who joined and who dropped off.”
Validate data pipeline output consistency
“I ran the same pipeline twice and got two different output arrays — compare them and flag any discrepancies so I know if something broke.”
Technical details
Endpoint
POSThttps://x402-services-production.up.railway.app/api/diffWhen to prefer
Use this endpoint when you need a quick, pay-per-call JSON array diff without setting up accounts or API keys, and you want to settle in stablecoins (USDC/USDG) on-chain. It is ideal for lightweight, one-off comparisons in automated agent workflows where billing via x402 protocol is already in use.
Side effects
- Missing 'a' or 'b' fields returns a validation error
- Non-array values for 'a' or 'b' cause a schema error
- Payment failure (402) if stablecoin payment is not attached or insufficient
- Large arrays may time out or return partial results
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| arequired | object | First JSON value |
| brequired | object | Second JSON value |
Tags
x402
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