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Would Pay Again – Book Sponsor Slot 4
x402
Would Pay Again – Book Sponsor Slot 4 is a paid API for AI agents from wouldpayagain.com, paid per call via x402, $1.75/call, status unknown (last checked 2026-10-10).
Books an advertisement sponsorship slot (slot #4) in the Would Pay Again newsletter about the x402 machine-payments economy, paid via USDC on Base.
Price / call$1.75
Success—
StatusUnknown
How this service works
A newsletter about the x402 machine-payments economy, sold over x402 itself. USDC on Base.
Output
Returns a JSON object confirming the booking with fields: ok (boolean success), status (e.g. 'pending_review'), confirmed (boolean), booking_id (integer), tearsheet URL (link to booking details page), and settlement_tx (Base blockchain transaction hash of the USDC payment).
Example use cases
Crypto startup newsletter ad booking
“Book me the Would Pay Again sponsorship slot 4 so I can advertise my new USDC payment SDK to their machine-payments readership — charge my Base wallet in USDC.”
Agent-automated ad placement
“Automatically reserve slot 4 in Would Pay Again for our next promotional campaign targeting x402 developers — pay the $1.75 USDC fee from our Base wallet and send me the tearsheet link once confirmed.”
First-time x402 economy advertiser
“I want to get in front of the Would Pay Again audience — can you book sponsorship slot 4 for me and show me the booking confirmation and tearsheet when it's done?”
Technical details
Endpoint
POSThttps://wouldpayagain.com/api/ads/book/sponsor-4?utm_source=zero.xyzWhen to prefer
Use this endpoint when you want to purchase advertising slot #4 specifically in the Would Pay Again newsletter and can pay in USDC on Base via the x402 protocol. This is the right choice for reaching an audience of developers, agents, and enthusiasts focused on machine-to-machine payments and the x402 economy. Choose this over generic ad networks when your target audience is specifically the crypto/x402/autonomous-payments community.
Side effects
- Payment failure if Base wallet has insufficient USDC balance
- Slot already booked — slot 4 may be unavailable for the requested period
- Request body missing required fields (type, method, bodyType, body) returns validation error
- Blockchain settlement delay causing timeout before tx confirmation
- API returns non-200 if the x402 payment header is malformed or missing
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"ok": true,
"status": "pending_review",
"confirmed": true,
"tearsheet": "https://wouldpayagain.com/api/ads/booking/6",
"booking_id": 6,
"settlement_tx": "0x…"
}
}Tags
x402
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