# Delx Commerce — JSON Key Denylist

> Delx Commerce — JSON Key Denylist 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 a JSON object against a list of denied key names and returns which forbidden keys are present

## Facts

- Endpoint: POST https://commerce.delx.ai/api/v1/x402/json-key-denylist?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-01
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/delx-commerce-json-key-denylist-f2c49825
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_gICdZtdb4lcOEQC003wfI

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability delx-commerce-json-key-denylist-f2c49825 -d '<json body>'
```

Example prompt: Check this JSON object for any forbidden keys — deny 'password', 'secret', and 'api_key': {"username": "alice", "password": "hunter2", "token": "abc123"}

## When to prefer this

Use this endpoint when you need a lightweight, stateless, pay-per-call check to detect forbidden or sensitive key names in a JSON object without storing any data. Ideal for agent pipelines that need verifiable, auditable validation (evidenced by input SHA-256) with no signup overhead. Prefer this over custom code when you need a provably non-retaining, in-memory-only key scan with cryptographic evidence of the input processed.

## Known failure modes

- Input object exceeds 128 properties — request rejected
- Denied list exceeds 256 items or any item exceeds 8192 characters — validation error
- Malformed JSON body — parse error response
- Payment failure via x402 — 402 Payment Required before processing

## 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 result object indicating whether the JSON object passed the denylist check (passed: true/false), a list of any denied keys that were found, the operation schema identifier, a status field (e.g. 'advisory'), and evidence metadata including whether input was retained (always false), the SHA-256 hash of the input, and the number of external calls made (always 0).

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "denied": {
   "type": "array",
   "items": {
    "type": "string",
    "maxLength": 8192
   },
   "maxItems": 256,
   "description": "Denied supplied to JSON Key Denylist; used only for this bounded calculation and processed in memory without retention."
  },
  "object": {
   "type": "object",
   "description": "Object supplied to JSON Key Denylist; used only for this bounded calculation and processed in memory without retention.",
   "maxProperties": 128,
   "additionalProperties": true
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "result": {
   "passed": false,
   "denied_keys": [
    "password"
   ]
  },
  "schema": "delx/util-json-key-denylist/v1",
  "status": "advisory",
  "evidence": {
   "retained": false,
   "input_sha256": "e2140fb14617296830e26895419ba5db41e0d9b605a101ae52d4dc0f016e86e2",
   "external_calls": 0
  },
  "operation": "data_batch:json_key_denylist"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/delx-commerce-json-key-denylist-f2c49825/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from commerce.delx.ai](https://www.zero.xyz/host/commerce.delx.ai/llms.txt)