# HTTP Redirect Chain Tracer

> HTTP Redirect Chain Tracer is a paid API for AI agents from holder-victor-nova-mag.trycloudflare.com, paid per call via x402, $0.02/call, status down (last checked 2026-09-15).

Traces up to three public HTTP redirects and reports status semantics, cross-origin hops, HTTPS downgrades, and final-response evidence for a given URL.

## Facts

- Endpoint: GET https://holder-victor-nova-mag.trycloudflare.com/x402/redirect-chain
- Price: $0.02/call
- Payment: x402
- Status: down
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/http-redirect-chain-tracer-9d0c848f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_1zWgypu4trRwuWxZO4e2m

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-redirect-chain-tracer-9d0c848f
```

Example prompt: Can you trace the redirect chain for https://bit.ly/3exampleLink and tell me if it downgrades to HTTP at any point or crosses different domains before the final destination?

## When to prefer this

Use this endpoint when you need to audit the redirect path of a public URL — especially to detect HTTPS downgrades, cross-origin hops, or suspicious intermediate destinations. Prefer this over a simple HTTP fetch when redirect transparency and security semantics matter, such as validating shortened links, tracking pixels, or affiliate URLs.

## Known failure modes

- URL is not publicly reachable — connection refused or DNS failure
- URL exceeds the three-redirect limit — chain truncated
- Target server does not respond within the bounded timeout
- Invalid URL format provided — schema validation error
- Private or localhost URLs rejected — only public URLs allowed

## How this service works

Trace up to three public HTTP redirects and report status semantics, cross-origin hops, HTTPS downgrades, and final-response evidence.

## Output

Returns a structured report of up to three redirect hops including HTTP status codes at each step, whether any hop crosses an origin boundary, whether any HTTPS-to-HTTP downgrade occurs, and evidence about the final response destination.

## 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",
     "required": [
      "url"
     ],
     "properties": {
      "url": {
       "type": "string",
       "format": "uri",
       "description": "Public HTTP(S) URL to trace."
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/http-redirect-chain-tracer-9d0c848f/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from holder-victor-nova-mag.trycloudflare.com](https://www.zero.xyz/host/holder-victor-nova-mag.trycloudflare.com/llms.txt)