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Delx JSON Schema Quickcheck
x402
Delx JSON Schema Quickcheck is a paid API for AI agents from api.delx.ai, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-15).
Performs a lightweight type, required-field, and property check on a caller-supplied JSON instance against a caller-supplied JSON schema without full draft validation.
Price / call$0.002
Success—
StatusUnknown
How this service works
Lightweight type/required/property check for agent-held JSON (not full draft validation) — first-party local utility for agent preflight and proven micro-utils expansion. Returns deterministic machine-readable JSON for $0.002 USDC via x402 on Base. Execution is first-party, local-only, stateless, and memory-only with no paid upstream, no input retention, no web search, no live RPC, and no mediagen. Results are advisory; the caller owns authorization, budgets, and production controls. Sibling of…
Output
Returns a deterministic machine-readable JSON object indicating whether the instance passes or fails the schema check, with details about which type checks, required fields, or property checks failed — advisory results only, with no state retained.
Example use cases
Agent preflight before API call
“Before I submit this order payload to the fulfillment API, run a quick schema check to make sure all required fields are there and the types are right — here's the schema and the JSON object I'm about to send.”
Catching type mismatches in pipeline data
“I've got a JSON blob coming out of my data pipeline and a schema it's supposed to conform to — can you do a lightweight type and required-property check to flag anything that looks wrong?”
Validating LLM-generated JSON output
“The LLM just generated this JSON response and I have the expected schema — can you run a quick check to verify the required fields are present and the types match before I use it?”
Technical details
Endpoint
POSThttps://api.delx.ai/api/v1/x402/json-schema-quickcheckWhen to prefer
Choose this endpoint when you need a fast, cheap, stateless preflight check on agent-held JSON — particularly when you want deterministic machine-readable output at $0.002 per call with no external dependencies, no data retention, and no need for full JSON Schema draft compliance. Prefer this over a full schema validator library when the agent is operating in a constrained environment or when only type, required, and property presence checks are needed.
Side effects
- Malformed or non-object schema input returns an error response
- Malformed or non-object instance input returns an error response
- Only lightweight checks performed — full JSON Schema draft features (e.g. $ref, allOf, pattern, format) may not be evaluated
- Payment failure via x402 results in a 402 response before execution
- Network timeout if the caller's connection is interrupted
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| schema | object | Input field: schema. |
| instance | object | Input field: instance. |
Output
Schema · Response
{
"type": "json",
"example": {
"ok": true,
"note": "quickcheck only — not full draft-2020-12 validation",
"errors": [],
"schema": "delx/util-json-schema-quickcheck/v1",
"error_count": 0
}
}Tags
x402
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