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SSDF Receipt Protocol
x402
SSDF Receipt Protocol is a paid API for AI agents from www.ssdf.site, paid per call via x402, $47/call, status unknown (last checked 2026-09-13).
Purchases the SSDF digital receipt SKU for $47 USDC on Base, returning a Passport token and fulfillment path upon successful payment settlement.
Price / call$47
Success—
StatusUnknown
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 success flag), `sku` (the purchased SKU identifier, e.g. 'ssdf-receipt-protocol'), `passport` (a unique Passport token ID minted on settlement), and `fulfillment` (a path like /api/fulfillment/{token} to retrieve the purchased digital product).
Example use cases
Agent-driven digital product purchase
“Go ahead and purchase the SSDF receipt protocol from SSDF INC's store — pay the $47 USDC and return the Passport ID and the fulfillment URL so I can access what I bought.”
Automated Passport minting on behalf of user
“I need you to mint an SSDF Passport for me by completing the $47 USDC purchase on SSDF's digital store — settle it on Base and give me the passport token once it's done.”
Programmatic storefront checkout for inventory system
“Run the SSDF receipt protocol purchase for our inventory system — pay the $47 USDC via Base, confirm the ok status, and log the SKU, Passport, and fulfillment path it returns.”
Technical details
Endpoint
GEThttps://www.ssdf.site/api/x402/ssdf-receipt-protocolWhen to prefer
Use this endpoint when you need to purchase the specific SSDF digital product SKU ('ssdf-receipt-protocol') and receive a blockchain-backed Passport token as proof of purchase, settled in USDC on Base via the x402 payment protocol. Prefer this over generic e-commerce APIs when the workflow requires both crypto payment settlement and identity/passport minting in a single call.
Side effects
- Payment rejected or insufficient USDC balance — endpoint returns non-ok response or HTTP 402
- x402 payment header malformed or missing — request blocked before processing
- On-chain settlement failure on Base — transaction may time out
- Duplicate payment attempt — may return a new passport or idempotency error depending on server state
- Network timeout before fulfillment URL is returned — partial state possible
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| input | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"schema": {
"type": "object",
"properties": {
"ok": {
"type": "boolean"
},
"sku": {
"type": "string"
},
"passport": {
"type": "string"
},
"fulfillment": {
"type": "string"
}
}
},
"example": {
"ok": true,
"sku": "ssdf-receipt-protocol",
"passport": "{id}",
"fulfillment": "/api/fulfillment/{token}"
}
}Tags
x402
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