Delx Commerce — JSON Array Length Check

x402

Delx Commerce — JSON Array Length 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).

Validates that specified array fields within a JSON object have lengths falling within a given minimum and maximum range, returning a pass/fail result with details on any invalid fields.

Price / call$0.001

Seller volume →—

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 specified array fields passed the length check (pass/fail status, boolean 'passed'), a list of any fields that violated the constraints ('invalid_fields'), the operation name, schema version, and evidence metadata including a SHA-256 hash of the input and confirmation that no data was retained and no external calls were made.

Example use cases

API payload pre-validation for agent pipelines

“Before sending this batch payload to the downstream service, check that the 'recipients' and 'attachments' array fields in this JSON each have between 1 and 50 elements: {"recipients":["alice@example.com","bob@example.com"],"attachments":["file1.pdf"]}.”

Data quality gate for ingested records

“I'm ingesting user records and need to confirm the 'tags' and 'roles' arrays in each record have at least 1 and no more than 5 elements — can you run this check on this object: {"tags":["vip","active","beta"],"roles":["admin","user","editor","moderator","reviewer","guest"]}?”

Form submission array constraint enforcement

“A user submitted this form response and I need to validate that their 'selected_options' array has between 2 and 4 choices: {"selected_options":["option_a","option_b","option_c","option_d","option_e"]}. Tell me if it passes or which fields fail.”

Technical details

Endpoint

POSThttps://commerce.delx.ai/api/v1/x402/json-array-length-check?utm_source=zero.xyz

When to prefer

Choose this endpoint when you need a lightweight, pay-per-call, no-signup array length validation check on JSON objects — especially useful in agentic workflows where you want verifiable, tamper-evident results (SHA-256 input hash) without retaining data. Prefer it over custom code when you need on-demand validation with a cryptographic audit trail and don't want to maintain validation infrastructure.

Side effects

Array field named in 'fields' not found in 'object' — may be silently skipped or flagged as invalid
Input object exceeds 128 properties limit — request rejected
Fields array exceeds 256 items limit — request rejected
Missing or malformed 'object' body — validation cannot proceed
Non-integer minimum or maximum values — schema validation error
Payment not included or insufficient USDC — 402 Payment Required response

Input

Schema · Request body

Field	Type	Description
fields	array	Fields supplied to JSON Array Length Check; used only for this bounded calculation and processed in memory without retention.
object	object	Object supplied to JSON Array Length Check; used only for this bounded calculation and processed in memory without retention.
maximum	integer	Maximum supplied to JSON Array Length Check; used only for this bounded calculation and processed in memory without retention.
minimum	integer	Minimum supplied to JSON Array Length 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-array-length-check/v1",
    "status": "pass",
    "evidence": {
      "retained": false,
      "input_sha256": "95a21205d9c6d659623a8ea762303c79e2d75f8c4ff1455041af6261652db58d",
      "external_calls": 0
    },
    "operation": "data_batch:json_array_length_check"
  }
}

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