# HTTP Status Checker (GPT-5.5 x402 Gateway)

> HTTP Status Checker (GPT-5.5 x402 Gateway) is a paid API for AI agents from gpt55.558686.xyz, paid per call via x402, $0.0001/call, status unknown (last checked 2026-09-15, last successful call 2026-07-23).

Fetches the HTTP status code and redirect chain for a given URL, returning status and fetch metadata.

## Facts

- Endpoint: GET https://gpt55.558686.xyz/v1/tools/http-status
- Price: $0.0001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Last successful call: 2026-07-23
- Success rate: 100% of calls made through Zero
- Activations on Zero: 3
- Tags: x402
- Canonical page: https://www.zero.xyz/c/http-status-checker-gpt-5-5-x402-gateway-500c9bc3
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_a7OBVDBvqosYqKDRCjZUm

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 http-status-checker-gpt-5-5-x402-gateway-500c9bc3
```

Example prompt: Can you check the HTTP status of https://example.com for me and tell me if it's up, what status code it returns, and whether it redirects anywhere?

## When to prefer this

Use this endpoint when you need a lightweight, pay-per-call HTTP status check without a subscription, especially in agentic workflows where you want to verify URL reachability or detect redirects on-demand using USDC micropayments on Base.

## Known failure modes

- URL is unreachable or times out — returns error or non-200 status
- Invalid or malformed URL input — schema validation error
- Timeout exceeded (max 12000ms) — timeout error returned
- Too many redirects beyond max_redirects limit — redirect error
- x402 payment failure — 402 response before tool execution

## How this service works

Fetch a public HTTP(S) URL and return status, final URL, headers summary, and redirect chain. This deterministic endpoint does not call an upstream model. Pay up to $0.001 per request with x402 USDC on Base. Public paid calls are limited to 1500 input characters and 128 output tokens.

## Output

Returns a JSON object with an 'ok' boolean, the tool name ('httpStatus'), a summary of HTTP status and redirect details, and a fetchedAt timestamp indicating when the check was performed.

## Example request

```json
{
 "input": {
  "type": "http",
  "method": "GET",
  "queryParams": {
   "url": "https://example.com",
   "timeout_ms": 5000,
   "max_redirects": 5
  }
 }
}
```

## 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",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "pathParams": {
     "type": "object",
     "additionalProperties": true
    },
    "queryParams": {
     "type": "object",
     "required": [
      "url"
     ],
     "properties": {
      "url": {
       "type": "string",
       "maxLength": 2048,
       "minLength": 1
      },
      "timeout_ms": {
       "type": "integer",
       "maximum": 12000,
       "minimum": 1000
      },
      "max_redirects": {
       "type": "integer",
       "maximum": 10,
       "minimum": 0
      }
     },
     "additionalProperties": false
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "ok": {
       "type": "boolean"
      },
      "tool": {
       "type": "string"
      },
      "fetchedAt": {
       "type": "string"
      }
     },
     "additionalProperties": true
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/http-status-checker-gpt-5-5-x402-gateway-500c9bc3/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from gpt55.558686.xyz](https://www.zero.xyz/host/gpt55.558686.xyz/llms.txt)