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Delx Commerce — JSON Unique Fields Check
x402
Delx Commerce — JSON Unique Fields Check is a paid API for AI agents from commerce.delx.ai, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-01).
Checks whether a list of JSON objects are unique across specified fields, returning duplicate indices and a pass/fail result
Price / call$0.001
Success—
StatusUnknown
How this service works
Pay-per-result APIs for agents. No signup. Exact price. Verifiable delivery. USDC on Base + Solana via x402.
Output
Returns a JSON object indicating whether all items are unique across the specified fields (`unique: true/false`), an array of duplicate indices if any exist, a pass/fail status, the operation name, and an evidence object containing whether data was retained (always false), a SHA-256 hash of the input, and the number of external calls made (always 0).
Example use cases
Pre-insert duplicate check for user records
“Before I add these new user sign-up records to the database, check if any of them share the same email or phone number — give me the indices of any duplicates.”
Validate uniqueness of product SKU batch
“I have a list of product JSON objects and I need to confirm every one has a unique 'sku' and 'barcode' combination — flag any duplicates with their positions in the list.”
Audit event log for repeated transaction IDs
“Here's a batch of transaction event objects — check whether any share the same 'transaction_id' field and tell me which ones are duplicates.”
Technical details
Endpoint
POSThttps://commerce.delx.ai/api/v1/x402/json-unique-fields-check?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a lightweight, verifiable, pay-per-use uniqueness check on JSON arrays without setting up infrastructure or accounts. It is ideal for agents performing one-off data quality checks before database writes, ETL pipelines, or deduplication audits where privacy matters (no data retained, evidenced by SHA-256 hash). Prefer this over rolling your own deduplication logic when operating in an autonomous agent context that supports x402 micropayments on Base or Solana.
Side effects
- Items array exceeds 256 items — request rejected
- Individual object exceeds 128 properties — validation error
- Field name string exceeds 8192 characters — rejected
- Malformed JSON body — parse error
- Missing required fields in request body — 400 error
- Payment not provided or insufficient — 402 Payment Required
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| items | array | Items supplied to JSON Unique Fields Check; used only for this bounded calculation and processed in memory without retention. |
| fields | array | Fields supplied to JSON Unique Fields Check; used only for this bounded calculation and processed in memory without retention. |
Output
Schema · Response
{
"type": "json",
"example": {
"result": {
"unique": true,
"duplicate_indices": []
},
"schema": "delx/util-json-unique-fields-check/v1",
"status": "pass",
"evidence": {
"retained": false,
"input_sha256": "9add83ab55b011d3994b700af703d6cc08072afb22cf6873ea05add8e1af633e",
"external_calls": 0
},
"operation": "data_batch:json_unique_fields_check"
}
}Tags
x402
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