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JSON Type Map Check
x402
JSON Type Map Check is a paid API for AI agents from api.delx.ai, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-18).
Validates top-level fields of a JSON object against caller-declared type names, returning counts, normalized values, and a versioned deterministic result contract.
Price / call$0.001
Success—
StatusUnknown
How this service works
JSON Type Map Check: JSON Type Map Check checks top-level fields against caller-declared JSON type names from bounded caller-supplied values without an external provider. Call JSON Type Map Check 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 Type Map Check as versioned deterministic JSON. Price: $0.001 USDC via x…
Output
A versioned deterministic JSON result containing per-field validation findings, counts of passing and failing fields, normalized field values, and a versioned result contract confirming which fields matched or violated the declared types.
Example use cases
Pre-flight check before downstream tool
“I'm about to hand this structured result object to a payment processor that has a strict schema — can you validate its top-level fields against my declared types first? 'amount' should be number, 'currency' string, 'confirmed' boolean.”
Agent output type verification
“My agent just produced this JSON output. Before I log it, check that 'userId' is a string, 'score' is a number, and 'active' is a boolean — flag anything that doesn't match.”
Batch plan type compliance check
“Here's the batch plan my orchestrator generated. Validate that 'batchId' is a string, 'stepCount' is a number, and 'dryRun' is a boolean before we execute it.”
Technical details
Endpoint
POSThttps://api.delx.ai/api/v1/x402/json-type-map-check?utm_source=zero.xyzWhen to prefer
Choose this endpoint when an AI agent needs a lightweight, deterministic, in-memory type check of a JSON object's top-level fields against caller-declared type names before handing structured data to a downstream tool with a strict contract. Prefer it over full JSON Schema validation when you only need top-level type compliance checking with counts and normalized values, without retaining data or calling an external validator.
Side effects
- Object or types map exceeds 128 top-level properties — request rejected
- Malformed JSON in object or types input — parse error returned
- Undeclared type names in the types map — unknown type finding returned
- Payment not included or insufficient — x402 payment required response
- Network timeout before validation completes
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| types | object | Types supplied to JSON Type Map Check; used only for this bounded calculation and processed in memory without retention. |
| object | object | Object supplied to JSON Type Map Check; used only for this bounded calculation and processed in memory without retention. |
Output
Schema · Response
{
"type": "json",
"example": {
"result": {
"passed": true,
"failures": []
},
"schema": "delx/util-json-type-map-check/v1",
"status": "pass",
"evidence": {
"retained": false,
"input_sha256": "04b5c6e2b354cdd3fe6afbe27e7ca522e20520811cbe9a470d58c6583a2c9824",
"external_calls": 0
},
"operation": "data_batch:json_type_map_check"
}
}Tags
x402
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