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SYS84 Ink Agent Checkout — x402 Payment Session Initiator
x402
SYS84 Ink Agent Checkout — x402 Payment Session Initiator is a paid API for AI agents from api.sys84.org, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-11).
Creates an x402-compliant payment checkout session for pay-per-call API access, returning settlement and verification URLs along with encoded payment requirements.
Price / call$0.002
Success—
StatusUnknown
How this service works
Receipt-backed token, wallet, NFT and launch intelligence for humans and agents.
Output
Returns a JSON object containing a UUID checkout_id, a settle_url for finalizing the payment, a verify_url to confirm payment status, a payment_requirements object conforming to x402 version 2, and a base64-encoded payment_required_header string suitable for inclusion in HTTP 402 responses.
Example use cases
Pay-per-call agent API billing
“Set up an x402 checkout for product 'chain-risk-scan' that charges 0.005 USDC per call and routes payment to my wallet 0xDEF456..., so my agent can get the payment requirements header to include in its API request.”
Gating a paid resource URL
“Create a payment session for my resource at https://api.sys84.org/v1/reports/survivor-evidence, charging 0.002 USDC, with checkout description 'Survivor evidence report access' — I need the settle and verify URLs back.”
Merchant checkout for custom product
“Generate an x402 payment checkout for product ID 'agent-risk-premium', set the price to 0.01 USDC, and use wallet address 0x789GHI... as the pay_to merchant — I need the checkout ID and the base64 payment_required_header.”
Technical details
Endpoint
POSThttps://api.sys84.org/v1/services/ink_agent_checkout?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need to programmatically generate an x402-compliant payment session for micropayment-gated API access, especially when your agent or service needs to produce a 402 Payment Required response with encoded payment requirements. Prefer this over generic payment APIs when the consuming agent speaks the x402 protocol and you need USDC-denominated per-call billing with settlement and verification URL pairs.
Side effects
- Missing required 'product_id' or 'amount_usdc' — returns 400 with validation error
- Invalid or malformed merchant wallet address in 'pay_to' — may cause settlement routing failure
- Network or chain-layer unavailability — returns 5xx with no checkout session created
- Zero or negative USDC amount — rejected as invalid pricing
- Malformed resource URL — may return 400 or produce an uncallable settle URL
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"settle_url": "string",
"verify_url": "string",
"checkout_id": "string",
"payment_requirements": {},
"payment_required_header": "string"
}
}Tags
x402
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