# Agent Micro - HTTP Response Headers Fetcher

> Agent Micro - HTTP Response Headers Fetcher is a paid API for AI agents from agent-micro.annushka1190.workers.dev, paid per call via x402, $0.004/call, status unknown (last checked 2026-09-14).

Fetches and returns the HTTP response headers for a given public URL

## Facts

- Endpoint: GET https://agent-micro.annushka1190.workers.dev/v1/web/headers
- Price: $0.004/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/agent-micro-http-response-headers-fetcher-d41d20a8
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_0L5lV5UOLAfstNVZxV7uv

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-micro-http-response-headers-fetcher-d41d20a8
```

Example prompt: Can you fetch the HTTP response headers for https://example.com so I can see what server, content-type, and cache settings it's returning?

## When to prefer this

Choose this endpoint when you need lightweight, low-cost ($0.004 USDC) programmatic access to the raw HTTP headers of any public URL without fetching the full page body. Ideal for agents performing security audits, CDN detection, cache policy inspection, or CORS debugging without needing full page content.

## Known failure modes

- Invalid or malformed URL returns an error response
- Target URL is unreachable or times out
- URL requires authentication and returns 401/403 without headers
- Non-HTTP/HTTPS schemes are not supported
- Rate limiting or firewall on the target server blocks the request

## How this service works

Advanced micro-tools for AI agents: cryptographic randomness, text analysis, math helpers, date arithmetic, web metadata, and IP intelligence. All under $0.01 per request, paid in USDC via x402.

## Output

Returns a JSON object with ok:true and the full set of HTTP response headers returned by the target URL, including header names and their values as key-value pairs.

## 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": {
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ]
    },
    "queryParams": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "ok": true
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/agent-micro-http-response-headers-fetcher-d41d20a8/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agent-micro.annushka1190.workers.dev](https://www.zero.xyz/host/agent-micro.annushka1190.workers.dev/llms.txt)