# Tolls Gateway Echo Test

> Tolls Gateway Echo Test is a paid API for AI agents from gw.tolls.fun, paid per call via x402, $0.004/call, status down (last checked 2026-11-04).

Sends a GET request to the Tolls gateway echo endpoint and returns the echoed response, confirming the gateway is reachable and functional.

## Facts

- Endpoint: GET https://gw.tolls.fun/test-echo?utm_source=zero.xyz
- Price: $0.004/call
- Payment: x402
- Status: down
- Last checked: 2026-11-04
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/tolls-gateway-echo-test-9e2d4495
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_9j8Vd2l40vcKGuN0xc2WI

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 tolls-gateway-echo-test-9e2d4495
```

Example prompt: Can you ping the Tolls gateway echo endpoint to confirm it's up and responding correctly?

## When to prefer this

Use this endpoint when you need to verify that the Tolls gateway (gw.tolls.fun) is live and reachable before making more complex calls, or when diagnosing connectivity issues specific to this gateway. It is the simplest available probe for the Tolls infrastructure.

## Known failure modes

- Gateway unreachable — network error or service downtime returns no response or connection timeout
- Payment not processed — x402 payment of $0.004 USDC required; missing or invalid payment header returns 402
- Invalid method — only GET is accepted; other methods return an error
- Schema mismatch — input type must be 'http'; incorrect type field causes rejection

## How this service works

Echo test for the gateway

## Output

Returns an echoed response from the Tolls gateway, confirming the gateway is live and able to process requests. The response mirrors the incoming GET request, serving as a connectivity and health signal.

## 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",
     "properties": {}
    }
   },
   "additionalProperties": false
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/tolls-gateway-echo-test-9e2d4495/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from gw.tolls.fun](https://www.zero.xyz/host/gw.tolls.fun/llms.txt)