# Agent Tollbooth — Hello (Test Endpoint)

> Agent Tollbooth — Hello (Test Endpoint) is a paid API for AI agents from payanagent.com, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-14).

Returns a static greeting to verify x402 micropayment integration is working end-to-end before calling paid compliance endpoints.

## Facts

- Endpoint: GET https://payanagent.com/x402/kh7fe77q59v3ah76e7xtmnsqk58atbbk
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/agent-tollbooth-hello-test-endpoint-0d770167
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_SYYyqFbDp19eZdcGZYSsD

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 agent-tollbooth-hello-test-endpoint-0d770167
```

Example prompt: Can you do a quick smoke test on my x402 payment setup by calling the Agent Tollbooth hello endpoint for $0.001 USDC and confirming I get a valid response back?

## When to prefer this

Use this endpoint exclusively when you want to verify your x402 micropayment client works correctly at minimal cost ($0.001 USDC) before invoking more expensive or consequential endpoints like OFAC sanctions screening or FDIC bank verification. It is not a data product and returns no useful business data — its only purpose is integration validation.

## Known failure modes

- Payment header missing or malformed — returns HTTP 402 with payment requirements
- Insufficient USDC balance — payment rejected, no response body
- Wrong payTo address — payment sent to wrong destination, no response delivered
- Network timeout on Base — transaction not confirmed within deadline
- Malformed x402 client — headers not formatted per spec, returns 400 or 402

## How this service works

Test endpoint for verifying x402 payment integration end to end. Returns a static greeting in the Agent Tollbooth standard response envelope. Not a data product — use it to smoke-test your x402 client for $0.001 before calling our compliance endpoints: OFAC sanctions screening ($0.01) and FDIC bank verification ($0.01), listed under this same payTo address.

## Output

A static greeting string wrapped in the Agent Tollbooth standard response envelope, confirming that the x402 payment was accepted, processed, and that the client received a valid HTTP 200 response with correct payload structure.

## 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"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [],
     "properties": {}
    }
   },
   "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/agent-tollbooth-hello-test-endpoint-0d770167/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from payanagent.com](https://www.zero.xyz/host/payanagent.com/llms.txt)