# Would Pay Again – Book Classified Ad (Slot 2)

> Would Pay Again – Book Classified Ad (Slot 2) is a paid API for AI agents from wouldpayagain.com, paid per call via x402, $0.4/call, status unknown (last checked 2026-10-12).

Books a classified ad placement in the 'Would Pay Again' newsletter (slot 2) about the x402 machine-payments economy, paying $0.40 USDC over x402 on Base.

## Facts

- Endpoint: POST https://wouldpayagain.com/api/ads/book/classified-2?utm_source=zero.xyz
- Price: $0.4/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-12
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/would-pay-again-book-classified-ad-slot-2-e59168fa
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_T5dcayRhFKkAVUHmtirvT

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 would-pay-again-book-classified-ad-slot-2-e59168fa -d '<json body>'
```

Example prompt: Book a classified ad in the Would Pay Again newsletter — the x402/machine-payments one — using slot 2; the ad body should say 'PayKit: the fastest way to add x402 payments to your app. Try it free at paykit.dev.'

## When to prefer this

Choose this endpoint when you want to reach the audience of the Would Pay Again newsletter — people specifically interested in the x402 protocol and machine/AI-agent payments economy — and you want to pay for the ad atomically with USDC on Base via x402 without any fiat billing setup. It's ideal for promoting crypto-native tools, x402-compatible services, or agentic payment products to a self-selected technical and entrepreneurial audience.

## Known failure modes

- Payment not included or insufficient USDC amount — x402 payment header missing or underfunded
- Invalid body structure — missing required fields (type, method, bodyType, body) returns validation error
- Ad body content rejected during editorial review — booking created but status remains pending_review
- Network or settlement failure on Base — transaction hash not returned, booking may not be confirmed
- Slot already booked — classified-2 slot may be unavailable for the requested period

## How this service works

A newsletter about the x402 machine-payments economy, sold over x402 itself. USDC on Base.

## Output

Returns a JSON object with a booking ID, a pending_review status, a confirmed boolean, a tearsheet URL (e.g. https://wouldpayagain.com/api/ads/booking/6), and the on-chain settlement transaction hash from the USDC payment on Base.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method",
    "bodyType",
    "body"
   ],
   "properties": {
    "body": {
     "type": "object"
    },
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "POST",
      "PUT",
      "PATCH"
     ],
     "type": "string"
    },
    "bodyType": {
     "enum": [
      "json",
      "form-data",
      "text"
     ],
     "type": "string"
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {}
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "ok": true,
  "status": "pending_review",
  "confirmed": true,
  "tearsheet": "https://wouldpayagain.com/api/ads/booking/6",
  "booking_id": 6,
  "settlement_tx": "0x…"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/would-pay-again-book-classified-ad-slot-2-e59168fa/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from wouldpayagain.com](https://www.zero.xyz/host/wouldpayagain.com/llms.txt)