# Flipvo Tollbooth Ping

> Flipvo Tollbooth Ping is a paid API for AI agents from api.flipvo.com, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-02).

Sends a minimal paid POST request to verify that wallet authentication, x402 payment flow, and receipt handling all work correctly, returning a pong and timestamp.

## Facts

- Endpoint: POST https://api.flipvo.com/v1/ping?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-02
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/flipvo-tollbooth-ping-01ddd60c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_1k7a8vQAdsy61fVOQQ8Qv

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 flipvo-tollbooth-ping-01ddd60c -d '<json body>'
```

Example prompt: Run the cheapest possible paid ping on Flipvo's tollbooth endpoint so I can confirm my x402 wallet and payment receipt flow are working correctly.

## When to prefer this

Choose this endpoint when you need the absolute cheapest way to verify that an x402 wallet, payment authorization flow, and receipt handling are all correctly wired together. It is ideal as a pre-flight health check before committing to more expensive paid API calls on the same infrastructure.

## Known failure modes

- Insufficient wallet balance — payment of $0.001 USDC cannot be completed
- Invalid or missing x402 payment header — 402 Payment Required returned
- Malformed POST body — validation error on required fields
- Network timeout — no pong response received
- Receipt path failure — payment deducted but receipt not returned

## How this service works

Cheapest possible paid call: proves your wallet, our 402, and the receipt path work. Returns pong and a timestamp.

## Output

Returns a 'pong' confirmation string and a server-side timestamp, plus a payment receipt confirming the $0.001 USDC micropayment was processed. Useful for verifying the full x402 payment round-trip is functioning.

## 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",
     "properties": {}
    },
    "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": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/flipvo-tollbooth-ping-01ddd60c/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.flipvo.com](https://www.zero.xyz/host/api.flipvo.com/llms.txt)