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pastable-x402 JSON Diff
x402
pastable-x402 JSON Diff is a paid API for AI agents from pastable-x402.pages.dev, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-14).
Compares two JSON objects and returns a structured list of differences (added, removed, changed fields) with path information.
Price / call$0.05
Success—
StatusUnknown
How this service works
Pay-per-call utility APIs for agents: EVM helpers (checksum, unit conversion, keccak), data transforms (CSV to JSON, JSON diff, URL canonicalisation), text tools (hashing, JWT decode), and Bazaar market intelligence. x402 on Base mainnet.
Output
Returns a JSON object containing a 'diffs' array where each element describes one change with 'path' (dot-notation field path), 'from' (old value), and 'to' (new value). Also returns a 'differences' integer count and a 'truncated' boolean indicating if the diff was too large to return in full.
Example use cases
API response drift detection
“I have two JSON responses from the same API endpoint taken a week apart — can you diff them and tell me which fields changed, were added, or were removed?”
Config change auditing
“Here are two versions of a JSON config file: the old one is {"timeout":30,"retries":3} and the new one is {"timeout":60,"retries":3,"debug":true} — what exactly changed between them?”
Data pipeline output validation
“My ETL pipeline produced two JSON records that should be identical but I think there's a bug — compare {"id":101,"status":"active","score":0.9} with {"id":101,"status":"inactive","score":0.9} and list any differences.”
Technical details
Endpoint
GEThttps://pastable-x402.pages.dev/data/json-diffWhen to prefer
Use this endpoint when you need a structured, machine-readable field-level diff between two JSON documents — especially when you need path notation and old/new values programmatically rather than a human-readable text diff. Ideal for agents monitoring API response drift, auditing config changes, or validating data pipeline outputs. Prefer over text-based diff tools when the input is guaranteed JSON and you need to parse the results downstream.
Side effects
- Malformed JSON in 'a' or 'b' query params returns an error response
- Missing required 'a' or 'b' query parameters results in a 400-style error
- Very large JSON objects may produce a truncated diff (truncated: true in response)
- Payment failure or insufficient USDC balance blocks the call via x402 protocol
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| input | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"diffs": [
{
"to": 2,
"from": 1,
"path": ".n"
}
],
"truncated": false,
"differences": 1
}
}Tags
x402
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