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JSON Object Diff
x402
JSON Object Diff is a paid API for AI agents from api.delx.ai, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-13).
Compares two JSON objects and reports added, removed, and changed top-level keys with counts and normalized values
Price / call$0.001
Success—
StatusUnknown
How this service works
JSON Object Diff: JSON Object Diff reports added, removed, and changed top-level object keys from bounded caller-supplied values without an external provider. Call JSON Object Diff before an agent hands structured data or a batch plan to a downstream tool with a stricter contract. Returns the bounded transformation or validation finding with counts, normalized values, and a versioned result contract for JSON Object Diff as versioned deterministic JSON. Price: $0.001 USDC via x402 on Base. First…
Output
Returns a versioned deterministic JSON result containing lists of added, removed, and changed top-level keys, along with counts of each change type, normalized values for the diffed fields, and a versioned result contract.
Example use cases
Preflight check before downstream tool
“Before sending this updated config payload to the deployment pipeline, diff the old config against the new one and show me exactly which keys changed so I can confirm nothing unexpected got modified.”
Audit agent-mutated data record
“My agent just transformed a customer record — can you diff the original object against the modified version and tell me which fields were added, removed, or changed so I can verify it only touched the fields it was supposed to?”
Validate API response drift
“I got two different responses from our API at different times — diff them as JSON objects and tell me which top-level keys are new, missing, or have different values between the two snapshots.”
Technical details
Endpoint
POSThttps://api.delx.ai/api/v1/x402/json-object-diffWhen to prefer
Choose this endpoint when you need a lightweight, deterministic, in-memory diff of two JSON objects' top-level keys without persisting data — especially as a preflight step before handing structured data to a downstream tool with a strict contract. Prefer it over general-purpose diffing logic when you need a versioned, normalized result contract for auditability in an agentic pipeline.
Side effects
- Either 'before' or 'after' object exceeds 128-property limit — request rejected
- Malformed or non-object input for before/after fields — validation error
- Payment failure via x402 — request not processed
- Network timeout or service unavailability — no result returned
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| after | object | After supplied to JSON Object Diff; used only for this bounded calculation and processed in memory without retention. |
| before | object | Before supplied to JSON Object Diff; used only for this bounded calculation and processed in memory without retention. |
Output
Schema · Response
{
"type": "json",
"example": {
"result": {
"added": {
"c": 3
},
"changed": {
"a": {
"after": 2,
"before": 1
}
},
"removed": {
"b": 2
}
},
"schema": "delx/util-json-object-diff/v1",
"status": "pass",
"evidence": {
"retained": false,
"input_sha256": "164aa307def42287450ca3e3593d1a42c71383be4ad4b1f0c368f8c66f056f3e",
"external_calls": 0
},
"operation": "data_batch:json_object_diff"
}
}Tags
x402
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