# JSON UUID Fields Check

> JSON UUID Fields Check is a paid API for AI agents from api.delx.ai, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-15).

Validates selected fields of a JSON object for canonical UUID format, returning counts, normalized values, and a versioned deterministic result.

## Facts

- Endpoint: POST https://api.delx.ai/api/v1/x402/json-uuid-fields-check?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/json-uuid-fields-check-f9a2c924
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_8zy_g3niBOlP7pl6ZRXi6

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability json-uuid-fields-check-f9a2c924 -d '<json body>'
```

Example prompt: Before I send this payload to the downstream service, can you check whether the fields 'userId', 'sessionId', and 'correlationId' in my JSON object are all valid canonical UUIDs?

## When to prefer this

Choose this endpoint when you need a lightweight, deterministic, in-memory check that specific JSON fields contain canonical UUID strings before passing structured data to a downstream system with a strict contract. Prefer it over general-purpose schema validators when UUID field compliance is the specific concern, and over writing custom validation logic when a pay-per-call microservice is more convenient. Ideal for agent pipelines that need a versioned, reproducible validation result with counts and normalized output.

## Known failure modes

- Fields array exceeds 256 items — request rejected
- Object exceeds 128 properties — request rejected
- Individual field string exceeds 8192 characters — rejected
- Malformed JSON input — parse error returned
- Payment not included or insufficient — 402 response
- Fields list references keys not present in the object — may return not-found or null results for those fields

## How this service works

JSON UUID Fields Check: checks selected fields for canonical UUID text shape using only bounded caller-supplied values. Call when you need a bounded json uuid fields check result 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 UUID Fields Check as versioned deterministic JSON. Price: $0.001 USDC via x402 on Base or…

## Output

A versioned deterministic JSON result containing: which specified fields pass or fail UUID format validation, counts of valid/invalid fields, normalized UUID values for passing fields, and a versioned result contract envelope — all computed in-memory without data retention.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "fields": {
   "type": "array",
   "items": {
    "type": "string",
    "maxLength": 8192
   },
   "maxItems": 256,
   "description": "Fields supplied to JSON UUID Fields Check; used only for this bounded calculation and processed in memory without retention."
  },
  "object": {
   "type": "object",
   "description": "Object supplied to JSON UUID Fields Check; used only for this bounded calculation and processed in memory without retention.",
   "maxProperties": 128,
   "additionalProperties": true
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "result": {
   "passed": true,
   "invalid_fields": []
  },
  "schema": "delx/util-json-uuid-fields-check/v1",
  "status": "pass",
  "evidence": {
   "retained": false,
   "input_sha256": "8eeb5bc9deefa111f9ffecc6114b6f5c2adf64812314e89c753e9dbcb881aa3c",
   "external_calls": 0
  },
  "operation": "data_batch:json_uuid_fields_check"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/json-uuid-fields-check-f9a2c924/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.delx.ai](https://www.zero.xyz/host/api.delx.ai/llms.txt)