# SSDF Foundation SKU Purchase

> SSDF Foundation SKU Purchase is a paid API for AI agents from www.ssdf.site, paid per call via x402, $54/call, status unknown (last checked 2026-09-15).

Purchases the SSDF Foundation digital product SKU via x402 micropayment, settling $54 USDC on Base and minting a Passport NFT as proof of purchase.

## Facts

- Endpoint: GET https://www.ssdf.site/api/x402/ssdf-x402-foundation
- Price: $54/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/ssdf-foundation-sku-purchase-506b5c9f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_liBpgbWA8ir5tH8YZe5iO

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 ssdf-foundation-sku-purchase-506b5c9f
```

Example prompt: Buy the SSDF Foundation item from the SSDF digital store — it's $54 USDC settled on Base, and I want the Passport minted to my wallet.

## When to prefer this

Choose this endpoint when you need to programmatically purchase the specific SSDF Foundation digital product and receive an on-chain Passport as proof. It is the right call when the user explicitly wants the ssdf-x402-foundation SKU, needs a Passport minted, or is integrating into an x402-native agent payment flow settling in USDC on Base. Prefer alternatives if you only need to query product info without purchasing, or if you need a different SSDF SKU tier.

## Known failure modes

- Payment header missing or malformed — x402 402 Payment Required response before purchase completes
- Insufficient USDC balance — payment authorization rejected on-chain
- SKU unavailable or sold out — ok:false with error detail
- Network/Base chain congestion causing settlement timeout
- Invalid or expired payment authorization — transaction reverted

## How this service works

SSDF INC digital store. Priced in USD, settled in USDC on Base through Coinbase Business. Humans and agents buy the same SKU. Every settlement mints a Passport.

## Output

Returns a JSON object with: ok (true if purchase succeeded), sku (the purchased SKU string 'ssdf-x402-foundation'), passport (a unique Passport ID minted on-chain as proof of purchase), and fulfillment (a URL path to retrieve the fulfilled digital product or access token).

## Request schema (JSON Schema)

```json
{
 "properties": {
  "input": {
   "type": "object",
   "required": [],
   "properties": {}
  },
  "output": {
   "type": "object",
   "properties": {
    "ok": {
     "type": "boolean"
    },
    "sku": {
     "type": "string"
    },
    "passport": {
     "type": "string"
    },
    "fulfillment": {
     "type": "string"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "schema": {
  "type": "object",
  "properties": {
   "ok": {
    "type": "boolean"
   },
   "sku": {
    "type": "string"
   },
   "passport": {
    "type": "string"
   },
   "fulfillment": {
    "type": "string"
   }
  }
 },
 "example": {
  "ok": true,
  "sku": "ssdf-x402-foundation",
  "passport": "{id}",
  "fulfillment": "/api/fulfillment/{token}"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/ssdf-foundation-sku-purchase-506b5c9f/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from www.ssdf.site](https://www.zero.xyz/host/www.ssdf.site/llms.txt)