# Would Pay Again – Book Classified Ad (3 Issues)

> Would Pay Again – Book Classified Ad (3 Issues) is a paid API for AI agents from wouldpayagain.com, paid per call via x402, $0.6/call, status unknown (last checked 2026-09-15).

Confirms and pays for a pre-reserved 3-issue Classified newsletter ad placement for $0.6 USDC via x402 machine payment.

## Facts

- Endpoint: POST https://wouldpayagain.com/api/ads/book/classified-3
- Price: $0.6/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/would-pay-again-book-classified-ad-3-issues-40a22b16
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_EP90guKVxTYlkbywx5KV3

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-3-issues-40a22b16 -d '<json body>'
```

Example prompt: I already reserved a 3-issue classified ad spot in the Would Pay Again newsletter — my reservation code is RES-ABC123. Go ahead and confirm the booking and pay the $0.6 USDC.

## When to prefer this

Use this endpoint when an agent has already obtained a reservation_code from POST /api/ads/reserve for the 3-issue Classified SKU and is ready to confirm and pay for the ad. Choose this over the 1-issue Classified booking endpoint when the advertiser wants a 3-issue run at $0.6 USDC. This is distinct from the Sponsor card booking endpoint, which covers a different ad format.

## Known failure modes

- Missing or invalid reservation_code returns an error and the booking is not created
- Attempting to pay for a different SKU than what was reserved (e.g. 1-issue vs 3-issue) is rejected
- Payment failure or insufficient USDC balance causes the booking to fail
- Reservation code already used or expired results in a booking rejection
- Calling this endpoint without first calling POST /api/ads/reserve to obtain a reservation_code will not succeed

## How this service works

Confirm and pay for a RESERVED Classified newsletter ad (3 issues, $0.6 USDC). Requires the matching "reservation_code" from POST /api/ads/reserve (free, first) — paying without one, or paying a different SKU than reserved, is not honored as a booking. Body: {"reservation_code": "..."}. Product docs: GET /api/ads (free).

## Output

A booking confirmation indicating the 3-issue classified ad is secured, tied to the provided reservation code and paid for at $0.6 USDC via x402.

## 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": {}
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/would-pay-again-book-classified-ad-3-issues-40a22b16/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)