# SSDF Tax Protocol

> SSDF Tax Protocol is a paid API for AI agents from www.ssdf.site, paid per call via x402, $42/call, status unknown (last checked 2026-09-16).

Purchases the SSDF Tax Protocol SKU from the SSDF digital store, settling $42 USDC on Base via Coinbase and minting a Passport NFT upon fulfillment.

## Facts

- Endpoint: GET https://www.ssdf.site/api/x402/ssdf-tax-protocol
- Price: $42/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/ssdf-tax-protocol-f73ee9b3
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_QzQU-ZoIpF2TRlQ1zqb1h

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-tax-protocol-f73ee9b3
```

Example prompt: Buy the SSDF Tax Protocol from the SSDF digital store for $42 USDC and get back my Passport ID and fulfillment token.

## When to prefer this

Choose this endpoint when you specifically need to purchase the SSDF Tax Protocol SKU from the SSDF digital store, receive a blockchain-minted Passport, and obtain a fulfillment token — all settled in USDC on Base via the x402 payment protocol. It is the only endpoint for this specific product.

## Known failure modes

- Insufficient USDC balance — payment rejected before settlement
- x402 payment header missing or malformed — 402 response with no fulfillment
- Network or Base chain congestion causing settlement timeout
- Invalid or expired payment token — fulfillment endpoint returns error
- ok: false returned with no Passport or fulfillment token, indicating transaction failure

## 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 an ok boolean indicating success, the purchased SKU string ('ssdf-tax-protocol'), a Passport ID minted upon settlement, and a fulfillment path token to access the purchased product.

## 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-tax-protocol",
  "passport": "{id}",
  "fulfillment": "/api/fulfillment/{token}"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/ssdf-tax-protocol-f73ee9b3/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)