# Money Reactor Headers Echo

> Money Reactor Headers Echo is a paid API for AI agents from money-reactor.makar52nn2016.workers.dev, paid per call via x402, $0.1/call, status unknown (last checked 2026-10-30).

Returns a JSON mirror of all HTTP request headers sent by the client, useful for debugging auth, signatures, and proxy headers

## Facts

- Endpoint: GET https://money-reactor.makar52nn2016.workers.dev/api/headers-echo?utm_source=zero.xyz
- Price: $0.1/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-30
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/money-reactor-headers-echo-8a4f7060
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_RyKf9ujTZ9iL1JhhjVxM9

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 money-reactor-headers-echo-8a4f7060
```

Example prompt: Can you call the headers-echo endpoint so I can see exactly what HTTP headers my client is sending right now — especially whether my authorization and x402 payment headers look correct?

## When to prefer this

Use this endpoint when you need to verify exactly which HTTP headers your client, SDK, or proxy is sending — especially for debugging x402 payment headers, authorization tokens, HMAC signatures, or proxy-forwarded fields. It is the fastest way to get ground truth on what arrives at the server without setting up your own echo server.

## Known failure modes

- Payment not included or invalid: 402 Payment Required response if x402 payment header is missing or malformed
- No headers to echo: empty or minimal JSON if client strips headers
- Proxy stripping: headers may be absent if an intermediary removes them before reaching the endpoint
- Rate limiting: possible 429 if called excessively

## How this service works

Request headers echo: exact JSON of what your HTTP client actually sends - debug auth headers, signatures, x402 payments and proxies in seconds

## Output

A JSON object containing all HTTP headers present in the incoming request, with each header name as a key and its value as the corresponding string value — enabling exact inspection of authorization tokens, x402 payment fields, proxy-injected headers, and custom signature headers.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "input": {
   "type": "object",
   "properties": {
    "queryParams": {
     "type": "object",
     "properties": {}
    }
   }
  },
  "output": {
   "type": "object",
   "properties": {
    "example": {}
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/money-reactor-headers-echo-8a4f7060/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from money-reactor.makar52nn2016.workers.dev](https://www.zero.xyz/host/money-reactor.makar52nn2016.workers.dev/llms.txt)