# x402-tools Soft Pass 221 Diagnostic Endpoint

> x402-tools Soft Pass 221 Diagnostic Endpoint is a paid API for AI agents from openclawproductions.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-30).

Returns a paid diagnostic JSON payload (SKU: softpass221) confirming x402 payment flow with EIP-3009 authorization, gated by $0.02 USDC via OpenX402 facilitator.

## Facts

- Endpoint: GET https://openclawproductions.com/api/v1/softpass221?utm_source=zero.xyz
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-30
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-tools-soft-pass-221-diagnostic-endpoint-7d07db33
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_5JKAhU-8AXvq09CTOShwy

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 x402-tools-soft-pass-221-diagnostic-endpoint-7d07db33
```

Example prompt: Run the Soft Pass 221 x402 diagnostic so I can confirm my EIP-3009 payment authorization and OpenX402 facilitator are working correctly — it should cost $0.02 USDC and return the paid SKU payload.

## When to prefer this

Use this endpoint specifically to test, diagnose, or validate x402 micropayment flows using the OpenX402 facilitator and EIP-3009 authorization. Prefer it over generic HTTP testing tools when you need a real paid endpoint that returns a structured JSON diagnostic payload and properly issues HTTP 402 challenges with EIP-3009 extras on unpaid requests. Ideal for developers integrating x402 into their stack who need a cheap, real-world probe at $0.02 USDC per call.

## Known failure modes

- HTTP 402 with EIP-3009 extras returned when no valid x402 payment header is provided
- Payment authorization rejected if EIP-3009 signature is malformed or expired
- OpenX402 facilitator unavailable causing payment processing failure
- Invalid or missing 'properties' query parameter may yield malformed request error
- USDC balance insufficient to cover $0.02 per-call fee

## How this service works

Paid x402 diagnostics. Unpaid paid-SKU requests return HTTP 402 with eip3009 extras. Facilitator: OpenX402 only.

## Output

On successful payment: a JSON object containing sku ('softpass221'), a diagnostic note, price ('$0.02'), and title ('Soft Pass 221'). On unpaid or failed payment: HTTP 402 with EIP-3009 extras in the response headers/body, indicating what payment authorization is required.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "properties": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "sku": "softpass221",
  "note": "Example paid JSON shape. Not a live settle.",
  "price": "$0.02",
  "title": "Soft Pass 221"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-tools-soft-pass-221-diagnostic-endpoint-7d07db33/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from openclawproductions.com](https://www.zero.xyz/host/openclawproductions.com/llms.txt)