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JSON URL Fields Check
x402
JSON URL 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 2026-09-15).
Validates selected fields in a JSON object to confirm they contain absolute HTTP or HTTPS URLs, returning counts, normalized values, and a versioned validation result.
Price / call$0.001
Success—
StatusUnknown
How this service works
JSON URL Fields Check: JSON URL Fields Check checks selected fields for absolute HTTP or HTTPS URL shape from bounded caller-supplied values without an external provider. Call JSON URL Fields 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 URL Fields Check as versioned deterministic JSON. Price: $0.001 USDC v…
Output
Returns a versioned deterministic JSON document containing: a pass/fail finding per checked field indicating whether the value matches absolute HTTP or HTTPS URL shape, counts of passing and failing fields, normalized URL values where applicable, and a versioned result contract identifier for downstream contract compliance.
Example use cases
Pre-flight check before downstream API call
“I'm about to send this structured plan to the reporting tool but it requires all link fields to be valid absolute URLs — can you check the fields 'report_url', 'logo_url', and 'redirect' in this object and tell me which ones pass the HTTP/HTTPS URL shape test?”
Batch payload URL field audit
“I have a JSON object with up to 50 fields and I need to know which ones I marked as URL fields actually contain proper absolute HTTP or HTTPS URLs — check the fields ['source', 'thumbnail', 'cta_link', 'fallback_url'] against this object and give me counts and normalized values.”
Agent result envelope URL validation
“My agent just produced a result envelope and I want to make sure the 'webhook_url' and 'asset_url' fields contain valid HTTPS URLs before I trigger the next workflow step — can you run the URL fields check on those two fields?”
Technical details
Endpoint
POSThttps://api.delx.ai/api/v1/x402/json-url-fields-checkWhen to prefer
Choose this endpoint when you need a deterministic, versioned, in-memory URL shape validation for specific named fields within a JSON object — particularly before handing structured data or a batch plan to a downstream tool with a strict URL contract. Prefer this over a general URL reachability checker (like Delx Url Health) when you only need format/shape validation without making an outbound network request to the URL. Prefer this over writing custom regex logic when you want a versioned, auditable contract result.
Side effects
- Field name not found in the provided object — reported as missing or null in findings
- Field value is not a string — flagged as invalid URL shape
- URL uses a non-HTTP/HTTPS scheme (e.g. ftp://, mailto:) — fails the absolute HTTP/HTTPS check
- Empty or null field values — counted as failures in the result
- Exceeding 256 items in the fields array or 128 properties in the object — may result in request rejection
- Malformed input schema (non-object body) — likely returns a 4xx error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| fields | array | Fields supplied to JSON URL Fields Check; used only for this bounded calculation and processed in memory without retention. |
| object | object | Object supplied to JSON URL Fields Check; used only for this bounded calculation and processed in memory without retention. |
Output
Schema · Response
{
"type": "json",
"example": {
"result": {
"passed": true,
"invalid_fields": []
},
"schema": "delx/util-json-url-fields-check/v1",
"status": "pass",
"evidence": {
"retained": false,
"input_sha256": "cb4e55880f0341cb1fa757a2bd29ae91f897ab40c9252e096c640684ad990ba9",
"external_calls": 0
},
"operation": "data_batch:json_url_fields_check"
}
}Tags
x402
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