# Well-Known File Scanner

> Well-Known File Scanner is a paid API for AI agents from intel.rallylive.ca, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).

Checks 37 standard well-known URLs on a domain and reports which ones exist, enabling rapid site reconnaissance.

## Facts

- Endpoint: GET https://intel.rallylive.ca/site/well-known
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/well-known-file-scanner-0202a4ff
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_hYTjfJ6xEEFiOFVp0c5h7

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 well-known-file-scanner-0202a4ff
```

Example prompt: Can you scan example.com and tell me which well-known files it exposes — things like robots.txt, security.txt, openapi.json, ai-plugin.json, did.json, and any other standard configuration files?

## When to prefer this

Choose this endpoint when you need rapid, broad reconnaissance of a domain's publicly-accessible standard configuration files without manually probing each one. It's ideal for agent capability discovery (ai-plugin.json, llms.txt), security research (security.txt), identity/DID workflows (did.json, webfinger), or any situation where you want a comprehensive snapshot of a site's well-known surface area in a single $0.01 call.

## Known failure modes

- Domain is unreachable or DNS fails — no results returned
- Domain exists but all 37 URLs return 404 — empty positive set
- Rate limiting or network timeouts from target server may affect results
- Malformed domain input may cause request errors
- Some URLs may be behind auth walls and appear absent even if they exist

## How this service works

Well-known file scan: checks 37 standard URLs on a domain (robots.txt, sitemap.xml, security.txt, ads.txt, llms.txt, openapi.json, manifest, openid-configuration, apple-app-site-association, assetlinks, webfinger, nodeinfo, agent.json, ai-plugin.json, matrix, did.json, feeds...) and reports which exist. Fast site reconnaissance. $0.01 per domain.

## Output

A structured report listing all 37 probed well-known URLs and whether each one exists on the target domain, including files like robots.txt, sitemap.xml, security.txt, ads.txt, llms.txt, openapi.json, manifest, openid-configuration, apple-app-site-association, assetlinks.json, webfinger, nodeinfo, agent.json, ai-plugin.json, matrix configuration, did.json, and various feed formats.

## 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": {}
    }
   },
   "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/well-known-file-scanner-0202a4ff/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from intel.rallylive.ca](https://www.zero.xyz/host/intel.rallylive.ca/llms.txt)