Favicon locator + fingerprint hash API

Discovers a site's favicon (from link rel=icon tags, falling back to /favicon.ico), fetches the icon bytes, and computes both a SHA-256 and the Shodan-compatible MurmurHash3 of the base64-encoded body. The value-add: the mmh3 favicon hash is the exact fingerprint used to pivot across hosts serving the same icon for asset discovery / phishing detection. Answers 'get the favicon hash for this site', 'fingerprint this favicon', 'find this site's favicon URL', 'compute the Shodan favicon hash'.

Price$0.01per request

MethodPOST

Route/v1/web/favicon

StatusLive

MIME typeapplication/json

Rate limit60/minute

Cache3600s public

webfaviconfingerprintmmh3shodanhashasset-discoveryicon

API URLhttps://x402.hexl.dev/v1/web/favicon

Integration docs

Example request

{
  "url": "https://example.com"
}

Example response

{
  "url": "https://example.com/",
  "faviconUrl": "https://example.com/favicon.ico",
  "candidates": [
    "https://example.com/favicon.ico"
  ],
  "found": true,
  "sha256": "9c2e3f...",
  "mmh3": -1234567890,
  "bytes": 1150
}

Input schema

{
  "type": "object",
  "required": [
    "url"
  ],
  "properties": {
    "url": {
      "type": "string",
      "examples": [
        "https://example.com"
      ]
    }
  }
}

Output schema

{
  "type": "object",
  "additionalProperties": true
}