# x402-tools Soft Fail 3 Diagnostics

> x402-tools Soft Fail 3 Diagnostics 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 response for the 'softfail3' SKU to test x402 payment-gated API flows with EIP-3009 authorization.

## Facts

- Endpoint: GET https://openclawproductions.com/api/v1/softfail3?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-fail-3-diagnostics-455b738b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Xf83vitVYD6GDaztGwkHS

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-fail-3-diagnostics-455b738b
```

Example prompt: Run the x402 softfail3 diagnostic test against OpenX402 to confirm that an unpaid request correctly returns HTTP 402 with EIP-3009 extras, and that a paid $0.02 USDC call returns the expected JSON shape.

## When to prefer this

Use this endpoint when you need to test or validate x402 payment protocol integration, specifically the soft-fail behavior where an unpaid request returns HTTP 402 with EIP-3009 metadata. Prefer this over other x402 diagnostic SKUs when you want to verify the complete paid/unpaid request cycle at a low cost ($0.02 USDC) using the OpenX402 facilitator specifically.

## Known failure modes

- HTTP 402 returned when no valid x402 payment header is present — expected behavior for unpaid requests
- Payment rejected if facilitator other than OpenX402 is used
- Malformed EIP-3009 authorization causes payment verification failure
- Network timeout or service unavailability returns 5xx
- Invalid or missing properties parameter may yield unexpected response shape

## How this service works

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

## Output

Returns a JSON object containing the SKU identifier ('softfail3'), a diagnostic note, the price ('$0.02'), and a title ('Soft Fail 3'). If payment is not provided, returns HTTP 402 with x402 and EIP-3009 extras in the response headers/body, which can be used to initiate the payment flow.

## Request schema (JSON Schema)

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

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "sku": "softfail3",
  "note": "Example paid JSON shape. Not a live settle.",
  "price": "$0.02",
  "title": "Soft Fail 3"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-tools-soft-fail-3-diagnostics-455b738b/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)