# x402-tools Grant Scroll Paid Diagnostic Endpoint

> x402-tools Grant Scroll Paid Diagnostic Endpoint is a paid API for AI agents from openclawproductions.com, paid per call via x402, $0.18/call, status unknown (last checked 2026-10-10).

Returns a paid diagnostic JSON payload ('Grant Scroll' SKU) via the x402 HTTP payment protocol, gating access with an EIP-3009 micropayment of $0.18 USDC facilitated by OpenX402.

## Facts

- Endpoint: GET https://openclawproductions.com/api/v1/grantscroll?utm_source=zero.xyz
- Price: $0.18/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-10
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-tools-grant-scroll-paid-diagnostic-endpoint-79d214ab
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_V9CA-kSJZPNFDQv_KToPN

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-grant-scroll-paid-diagnostic-endpoint-79d214ab
```

Example prompt: Can you test the x402 Grant Scroll diagnostic endpoint and confirm my USDC micropayment of $0.18 goes through and I get back a valid paid JSON response?

## When to prefer this

Choose this endpoint when you need to test or validate an end-to-end x402 HTTP micropayment flow using EIP-3009 and USDC, specifically against the OpenX402 facilitator. It is ideal for integration testing, agent payment capability verification, or debugging HTTP 402 gating behavior. It is not suitable for production data retrieval or non-x402 payment workflows.

## Known failure modes

- HTTP 402 returned when no valid x402 payment header is provided — response includes EIP-3009 payment requirement details
- Payment authorization rejected if EIP-3009 token is malformed, expired, or from an unsupported wallet
- Facilitator unavailable: OpenX402 is the only accepted facilitator; other facilitators will be rejected
- Insufficient USDC balance causes payment failure and HTTP 402 response
- Network or RPC errors on the blockchain side may cause intermittent payment settlement failures

## How this service works

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

## Output

A JSON object containing the SKU identifier ('grantscroll'), a descriptive title ('Grant Scroll'), the price ('$0.18'), and a diagnostic note confirming the paid response shape. If payment is not included or fails, the endpoint returns HTTP 402 with EIP-3009 extras describing the required payment.

## Request schema (JSON Schema)

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

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "sku": "grantscroll",
  "note": "Example paid JSON shape. Not a live settle.",
  "price": "$0.18",
  "title": "Grant Scroll"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-tools-grant-scroll-paid-diagnostic-endpoint-79d214ab/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)