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X402 Delivery Schema Check
x402
X402 Delivery Schema Check is a paid API for AI agents from api.delx.ai, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-13).
Validates delivered x402/agent result objects against a caller-specified required field list, returning acceptance or rejection status with mismatch reasons and normalized evidence.
Price / call$0.001
Success—
StatusUnknown
How this service works
X402 Delivery Schema Check: X402 Delivery Schema Check checks delivered object fields against a caller-required field list from bounded caller-supplied values without an external provider. Call X402 Delivery Schema Check before paying for or accepting an x402 or agent delivery assembled from caller-supplied challenge and result metadata. Returns contract-specific checks, normalized evidence, mismatch reasons, and an explicit acceptance or rejection status for X402 Delivery Schema Check as versi…
Output
Returns a structured response containing an explicit acceptance or rejection status for the delivered object, contract-specific field checks, normalized evidence of what was found, and detailed mismatch reasons for any fields that failed validation.
Example use cases
Pre-payment x402 delivery gate
“I just received an x402 agent result and I need to verify it has all required fields — 'order_id', 'status', 'delivery_proof', and 'timestamp' — before I release payment. Can you run a schema check on it?”
Automated agent output validation
“My agent pipeline assembles results from multiple sources. Before accepting any result, check it against my required field list ['user_id', 'summary', 'confidence_score'] and tell me exactly which fields are missing or mismatched.”
Rejection screening for incomplete deliveries
“Screen this delivered result object for me — I need to know if it satisfies all of these required fields: 'payload', 'signature', 'issued_at', 'contract_ref'. Give me the acceptance or rejection decision and the specific reasons if it fails.”
Technical details
Endpoint
POSThttps://api.delx.ai/api/v1/x402/x402-delivery-schema-checkWhen to prefer
Use this endpoint when you need a lightweight, in-memory, no-external-dependency schema check on an x402 or agent delivery result before committing to payment or downstream processing. Prefer this over custom validation logic when you want a standardized acceptance/rejection decision with explicit mismatch reasons, especially in agentic pipelines where result completeness must be gated before payment release.
Side effects
- Result object exceeds 128 properties limit — request rejected
- Required fields array exceeds 256 items limit — request rejected
- Individual field name exceeds 8192 character limit — request rejected
- Malformed result object (not a valid JSON object) — validation error
- Empty required_fields array — may return acceptance trivially
- Payment of 0.001 USDC not fulfilled — 402 response returned
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| result | object | Result supplied to X402 Delivery Schema Check; used only for this bounded calculation and processed in memory without retention. |
| required_fields | array | Required Fields supplied to X402 Delivery Schema Check; used only for this bounded calculation and processed in memory without retention. |
Output
Schema · Response
{
"type": "json",
"example": {
"result": {
"schema_valid": true,
"missing_fields": []
},
"schema": "delx/util-x402-delivery-schema-check/v1",
"status": "pass",
"evidence": {
"retained": false,
"input_sha256": "5a2d2f997e6dd8109bb4a094caded4b79eb4c788696584b9ac0b919395398f9b",
"external_calls": 0
},
"operation": "delivery_contract:x402_delivery_schema_check"
}
}Tags
x402
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