# SSDF Seller Carry Protocol

> SSDF Seller Carry Protocol is a paid API for AI agents from www.ssdf.site, paid per call via x402, $59/call, status unknown (last checked 2026-09-15).

Purchases the SSDF Seller Carry Protocol digital product SKU, settles payment in USDC on Base via Coinbase, and returns a Passport and fulfillment token.

## Facts

- Endpoint: GET https://www.ssdf.site/api/x402/ssdf-seller-carry-protocol
- Price: $59/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/ssdf-seller-carry-protocol-8c4cb0ad
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_vNgyOzSTb7sHSbtRheMeu

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-seller-carry-protocol-8c4cb0ad
```

Example prompt: Buy me the SSDF Seller Carry Protocol from the SSDF digital store — pay the $59 USDC price, settle it on Base, and give me back my Passport and fulfillment link.

## When to prefer this

Use this endpoint when you specifically need to purchase the SSDF Seller Carry Protocol digital product, settle payment natively in USDC on Base via Coinbase Business, and receive a minted Passport plus a fulfillment token in a single call. It is purpose-built for the x402 payment protocol and works identically for human and agent callers. Prefer it over generic e-commerce APIs when the target SKU is exactly 'ssdf-seller-carry-protocol' and you need blockchain-verifiable settlement and identity issuance in one step.

## Known failure modes

- Insufficient USDC balance — payment cannot be completed on Base
- x402 payment header missing or malformed — returns 402 Payment Required
- On-chain transaction failure or gas issue — payment not settled
- Invalid or expired USDC authorization — returns auth error
- Fulfillment service unavailable — ok: false with no fulfillment token returned

## 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' (boolean indicating success), 'sku' (the purchased SKU identifier, e.g. 'ssdf-seller-carry-protocol'), 'passport' (a unique Passport ID minted upon settlement), and 'fulfillment' (a path to retrieve the digital product, e.g. '/api/fulfillment/{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-seller-carry-protocol",
  "passport": "{id}",
  "fulfillment": "/api/fulfillment/{token}"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/ssdf-seller-carry-protocol-8c4cb0ad/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)