# unprice HTTP Headers Fetcher

> unprice HTTP Headers Fetcher is a paid API for AI agents from volkov.evgeny.m2.fvds.ru, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-11).

Fetches the HTTP response headers of any given URL via a pay-per-request proxy, returning status code and header fields

## Facts

- Endpoint: GET https://volkov.evgeny.m2.fvds.ru/pay/headers?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-11
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/unprice-http-headers-fetcher-4835c0a7
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_4Uj9cDhIUmuXkfFHtuHzO

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 unprice-http-headers-fetcher-4835c0a7
```

Example prompt: Can you fetch the HTTP response headers for https://example.com and tell me what status code and content-type it returns?

## When to prefer this

Use this endpoint when you need a quick, lightweight probe of a URL's HTTP headers and status code without downloading the full response body. It is especially useful for checking content-type, CORS policy, cache directives, redirect status, or server identity cheaply at $0.002 per call via USDC on Base.

## Known failure modes

- Target URL is unreachable or times out — may return an error or empty headers
- Invalid or malformed URL input causes a request failure
- Target server returns no headers or blocks automated requests
- Payment failure on Base network prevents the request from being processed

## How this service works

Tiny paid web services for agents. Pay per request with USDC on Base via x402, plus non-x402 Base USDC tx-hash checkouts for Merchant Feed Audit, Base USDC receipts, and recent wallet statements.

## Output

A JSON object containing the target URL, the HTTP status code returned, and a map of HTTP response header names to their values (e.g. content-type, server, cache-control).

## 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": {
      "url": {
       "type": "string"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "url": "https://example.com",
  "status": 200,
  "headers": {
   "content-type": "text/html"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/unprice-http-headers-fetcher-4835c0a7/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from volkov.evgeny.m2.fvds.ru](https://www.zero.xyz/host/volkov.evgeny.m2.fvds.ru/llms.txt)