utilsforagents.com JSON Diff

x402

utilsforagents.com JSON Diff is a paid API for AI agents from utilsforagents.com, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-10).

Compare two JSON objects or arrays and return a structured list of differences as RFC 6902-style patch operations with JSON Pointer paths.

Price / call$0.003

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Success—

StatusUnknown

How this service works

Pay-per-call AI agent utilities plus a free feedback endpoint: JSON diff, EXIF extraction, metadata scrubbing, HTML-to-Markdown, URL fetching, and feature-request collection. $0.003/call for paid utility routes via x402 on Base or Solana.

Output

Returns an 'ok' boolean, a 'diff' array of RFC 6902-style patch operations (each with 'op' as add/remove/replace, 'path' as a JSON Pointer string, and 'oldValue'/'newValue' where applicable), plus a 'stats' object with counts of added, removed, changed, and unchanged fields and processing time in milliseconds.

Example use cases

Config drift detection between deployments

“I need to see what settings changed in our production config between this morning's deploy and now. Here's the old config and the new one — can you break down exactly which fields were added, removed, or modified so I can audit what happened?”

API response change tracking for monitoring

“We're getting different data back from the customer API than we did yesterday. Can you compare these two response payloads and tell me which fields got updated, which are new, and which disappeared — I need to know if this is expected?”

Database record update auditing

“Show me all the differences between the customer record we had yesterday and what it looks like today. I need the exact changes with paths so I can log them for compliance — what fields were touched and what were the old versus new values?”

Technical details

Endpoint

POSThttps://utilsforagents.com/v1/diff?utm_source=zero.xyz

When to prefer

Use this endpoint when you need a structured, machine-readable diff of two JSON documents — especially when you need RFC 6902 patch operations with JSON Pointer paths for audit logging, change detection, config comparison, or reconstructing state transitions. Prefer this over text-based diff tools when working with structured data where field-level granularity and JSON Pointer paths matter.

Side effects

Invalid JSON in left or right fields returns a 400-level error
maxDepth value outside 1–256 range causes a validation error
Extremely large or deeply nested JSON may hit depth limits if maxDepth is too low
Non-object/non-array top-level JSON values may produce unexpected results
Missing left or right field in request body returns an error

Input

{
  "left": {
    "tags": [
      "test",
      "demo"
    ],
    "count": 5,
    "status": "active"
  },
  "right": {
    "tags": [
      "test",
      "demo",
      "updated"
    ],
    "count": 5,
    "status": "inactive"
  },
  "options": {
    "maxDepth": 32,
    "includeUnchanged": true
  }
}

Schema · Request body

Field	Type	Description
left	object	Original JSON value
right	object	Modified JSON value
options	object	Optional diff settings

Output

{
  "ok": true,
  "diff": [
    {
      "op": "add",
      "path": "/tags/2",
      "value": "updated"
    },
    {
      "op": "replace",
      "path": "/status",
      "newValue": "inactive",
      "oldValue": "active"
    }
  ],
  "stats": {
    "added": 1,
    "changed": 1,
    "removed": 0,
    "unchanged": 3,
    "processingTimeMs": 0
  }
}

Schema · Response

{
  "type": "json",
  "example": {
    "ok": true,
    "diff": [
      {
        "op": "replace",
        "path": "/name",
        "newValue": "Bob",
        "oldValue": "Alice"
      }
    ],
    "stats": {
      "added": 0,
      "changed": 1,
      "removed": 0,
      "unchanged": 0,
      "processingTimeMs": 0.042
    }
  }
}

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