.well-known inspector

HTTP /api/v1/http/well-known

Probe RFC 8615 .well-known files: security.txt, change-password, openid, mta-sts, etc.

Try: https://host.com https://checkhost.com https://hostinfo.com https://crypt.tools

Related: HTTP headers Security headers grader Redirect chain tracer SSL certificate inspector robots.txt parser sitemap.xml inspector

Result

Raw JSON

API / curl

538 ms · live

{
    "host": "hostinfo.com",
    "count": 16,
    "present": 0,
    "results": {
        "security.txt": {
            "path": "/.well-known/security.txt",
            "status": 404,
            "present": false,
            "ms": 37,
            "preview": "<html>\r\n<head><title>404 Not Found</title></head>\r\n<body>\r\n<center><h1>404 Not Found</h1></center>\r\n<hr><center>nginx</center>\r\n</body>\r\n</html>\r\n"
        },
        "change-password": {
            "path": "/.well-known/change-password",
            "status": 404,
            "present": false,
            "ms": 34,
            "preview": "<html>\r\n<head><title>404 Not Found</title></head>\r\n<body>\r\n<center><h1>404 Not Found</h1></center>\r\n<hr><center>nginx</center>\r\n</body>\r\n</html>\r\n"
        },
        "openid-configuration": {
            "path": "/.well-known/openid-configuration",
            "status": 404,
            "present": false,
            "ms": 27,
            "preview": "<html>\r\n<head><title>404 Not Found</title></head>\r\n<body>\r\n<center><h1>404 Not Found</h1></center>\r\n<hr><center>nginx</center>\r\n</body>\r\n</html>\r\n"
        },
        "oauth-authorization-server": {
            "path": "/.well-known/oauth-authorization-server",
            "status": 404,
            "present": false,
            "ms": 37,
            "preview": "<html>\r\n<head><title>404 Not Found</title></head>\r\n<body>\r\n<center><h1>404 Not Found</h1></center>\r\n<hr><center>nginx</center>\r\n</body>\r\n</html>\r\n"
        },
        "apple-app-site-association": {
            "path": "/.well-known/apple-app-site-association",
            "status": 404,
            "present": false,
            "ms": 36,
            "preview": "<html>\r\n<head><title>404 Not Found</title></head>\r\n<body>\r\n<center><h1>404 Not Found</h1></center>\r\n<hr><center>nginx</center>\r\n</body>\r\n</html>\r\n"
        },
        "assetlinks.json": {
            "path": "/.well-known/assetlinks.json",
            "status": 404,
            "present": false,
            "ms": 39,
            "preview": "<html>\r\n<head><title>404 Not Found</title></head>\r\n<body>\r\n<center><h1>404 Not Found</h1></center>\r\n<hr><center>nginx</center>\r\n</body>\r\n</html>\r\n"
        },
        "mta-sts.txt": {
            "path": "/.well-known/mta-sts.txt",
            "status": 404,
            "present": false,
            "ms": 40,
            "preview": "<html>\r\n<head><title>404 Not Found</title></head>\r\n<body>\r\n<center><h1>404 Not Found</h1></center>\r\n<hr><center>nginx</center>\r\n</body>\r\n</html>\r\n"
        },
        "gpc.json": {
            "path": "/.well-known/gpc.json",
            "status": 404,
            "present": false,
            "ms": 27,
            "preview": "<html>\r\n<head><title>404 Not Found</title></head>\r\n<body>\r\n<center><h1>404 Not Found</h1></center>\r\n<hr><center>nginx</center>\r\n</body>\r\n</html>\r\n"
        },
        "matrix/server": {
            "path": "/.well-known/matrix/server",
            "status": 404,
            "present": false,
            "ms": 31,
            "preview": "<html>\r\n<head><title>404 Not Found</title></head>\r\n<body>\r\n<center><h1>404 Not Found</h1></center>\r\n<hr><center>nginx</center>\r\n</body>\r\n</html>\r\n"
        },
        "matrix/client": {
            "path": "/.well-known/matrix/client",
            "status": 404,
            "present": false,
            "ms": 27,
            "preview": "<html>\r\n<head><title>404 Not Found</title></head>\r\n<body>\r\n<center><h1>404 Not Found</h1></center>\r\n<hr><center>nginx</center>\r\n</body>\r\n</html>\r\n"
        },
        "webfinger": {
            "path": "/.well-known/webfinger?resource=acct:[email protected]",
            "status": 404,
            "present": false,
            "ms": 33,
            "preview": "<html>\r\n<head><title>404 Not Found</title></head>\r\n<body>\r\n<center><h1>404 Not Found</h1></center>\r\n<hr><center>nginx</center>\r\n</body>\r\n</html>\r\n"
        },
        "host-meta": {
            "path": "/.well-known/host-meta",
            "status": 404,
            "present": false,
            "ms": 33,
            "preview": "<html>\r\n<head><title>404 Not Found</title></head>\r\n<body>\r\n<center><h1>404 Not Found</h1></center>\r\n<hr><center>nginx</center>\r\n</body>\r\n</html>\r\n"
        },
        "nodeinfo": {
            "path": "/.well-known/nodeinfo",
            "status": 404,
            "present": false,
            "ms": 31,
            "preview": "<html>\r\n<head><title>404 Not Found</title></head>\r\n<body>\r\n<center><h1>404 Not Found</h1></center>\r\n<hr><center>nginx</center>\r\n</body>\r\n</html>\r\n"
        },
        "did.json": {
            "path": "/.well-known/did.json",
            "status": 404,
            "present": false,
            "ms": 33,
            "preview": "<html>\r\n<head><title>404 Not Found</title></head>\r\n<body>\r\n<center><h1>404 Not Found</h1></center>\r\n<hr><center>nginx</center>\r\n</body>\r\n</html>\r\n"
        },
        "pki-validation/": {
            "path": "/.well-known/pki-validation/",
            "status": 404,
            "present": false,
            "ms": 35,
            "preview": "<html>\r\n<head><title>404 Not Found</title></head>\r\n<body>\r\n<center><h1>404 Not Found</h1></center>\r\n<hr><center>nginx</center>\r\n</body>\r\n</html>\r\n"
        },
        "acme-challenge/": {
            "path": "/.well-known/acme-challenge/",
            "status": 404,
            "present": false,
            "ms": 33,
            "preview": "<html>\r\n<head><title>404 Not Found</title></head>\r\n<body>\r\n<center><h1>404 Not Found</h1></center>\r\n<hr><center>nginx</center>\r\n</body>\r\n</html>\r\n"
        }
    }
}

{
    "ok": true,
    "slug": "http/well-known",
    "title": ".well-known inspector",
    "ms": 538,
    "data": {
        "host": "hostinfo.com",
        "count": 16,
        "present": 0,
        "results": {
            "security.txt": {
                "path": "/.well-known/security.txt",
                "status": 404,
                "present": false,
                "ms": 37,
                "preview": "<html>\r\n<head><title>404 Not Found</title></head>\r\n<body>\r\n<center><h1>404 Not Found</h1></center>\r\n<hr><center>nginx</center>\r\n</body>\r\n</html>\r\n"
            },
            "change-password": {
                "path": "/.well-known/change-password",
                "status": 404,
                "present": false,
                "ms": 34,
                "preview": "<html>\r\n<head><title>404 Not Found</title></head>\r\n<body>\r\n<center><h1>404 Not Found</h1></center>\r\n<hr><center>nginx</center>\r\n</body>\r\n</html>\r\n"
            },
            "openid-configuration": {
                "path": "/.well-known/openid-configuration",
                "status": 404,
                "present": false,
                "ms": 27,
                "preview": "<html>\r\n<head><title>404 Not Found</title></head>\r\n<body>\r\n<center><h1>404 Not Found</h1></center>\r\n<hr><center>nginx</center>\r\n</body>\r\n</html>\r\n"
            },
            "oauth-authorization-server": {
                "path": "/.well-known/oauth-authorization-server",
                "status": 404,
                "present": false,
                "ms": 37,
                "preview": "<html>\r\n<head><title>404 Not Found</title></head>\r\n<body>\r\n<center><h1>404 Not Found</h1></center>\r\n<hr><center>nginx</center>\r\n</body>\r\n</html>\r\n"
            },
            "apple-app-site-association": {
                "path": "/.well-known/apple-app-site-association",
                "status": 404,
                "present": false,
                "ms": 36,
                "preview": "<html>\r\n<head><title>404 Not Found</title></head>\r\n<body>\r\n<center><h1>404 Not Found</h1></center>\r\n<hr><center>nginx</center>\r\n</body>\r\n</html>\r\n"
            },
            "assetlinks.json": {
                "path": "/.well-known/assetlinks.json",
                "status": 404,
                "present": false,
                "ms": 39,
                "preview": "<html>\r\n<head><title>404 Not Found</title></head>\r\n<body>\r\n<center><h1>404 Not Found</h1></center>\r\n<hr><center>nginx</center>\r\n</body>\r\n</html>\r\n"
            },
            "mta-sts.txt": {
                "path": "/.well-known/mta-sts.txt",
                "status": 404,
                "present": false,
                "ms": 40,
                "preview": "<html>\r\n<head><title>404 Not Found</title></head>\r\n<body>\r\n<center><h1>404 Not Found</h1></center>\r\n<hr><center>nginx</center>\r\n</body>\r\n</html>\r\n"
            },
            "gpc.json": {
                "path": "/.well-known/gpc.json",
                "status": 404,
                "present": false,
                "ms": 27,
                "preview": "<html>\r\n<head><title>404 Not Found</title></head>\r\n<body>\r\n<center><h1>404 Not Found</h1></center>\r\n<hr><center>nginx</center>\r\n</body>\r\n</html>\r\n"
            },
            "matrix/server": {
                "path": "/.well-known/matrix/server",
                "status": 404,
                "present": false,
                "ms": 31,
                "preview": "<html>\r\n<head><title>404 Not Found</title></head>\r\n<body>\r\n<center><h1>404 Not Found</h1></center>\r\n<hr><center>nginx</center>\r\n</body>\r\n</html>\r\n"
            },
            "matrix/client": {
                "path": "/.well-known/matrix/client",
                "status": 404,
                "present": false,
                "ms": 27,
                "preview": "<html>\r\n<head><title>404 Not Found</title></head>\r\n<body>\r\n<center><h1>404 Not Found</h1></center>\r\n<hr><center>nginx</center>\r\n</body>\r\n</html>\r\n"
            },
            "webfinger": {
                "path": "/.well-known/webfinger?resource=acct:[email protected]",
                "status": 404,
                "present": false,
                "ms": 33,
                "preview": "<html>\r\n<head><title>404 Not Found</title></head>\r\n<body>\r\n<center><h1>404 Not Found</h1></center>\r\n<hr><center>nginx</center>\r\n</body>\r\n</html>\r\n"
            },
            "host-meta": {
                "path": "/.well-known/host-meta",
                "status": 404,
                "present": false,
                "ms": 33,
                "preview": "<html>\r\n<head><title>404 Not Found</title></head>\r\n<body>\r\n<center><h1>404 Not Found</h1></center>\r\n<hr><center>nginx</center>\r\n</body>\r\n</html>\r\n"
            },
            "nodeinfo": {
                "path": "/.well-known/nodeinfo",
                "status": 404,
                "present": false,
                "ms": 31,
                "preview": "<html>\r\n<head><title>404 Not Found</title></head>\r\n<body>\r\n<center><h1>404 Not Found</h1></center>\r\n<hr><center>nginx</center>\r\n</body>\r\n</html>\r\n"
            },
            "did.json": {
                "path": "/.well-known/did.json",
                "status": 404,
                "present": false,
                "ms": 33,
                "preview": "<html>\r\n<head><title>404 Not Found</title></head>\r\n<body>\r\n<center><h1>404 Not Found</h1></center>\r\n<hr><center>nginx</center>\r\n</body>\r\n</html>\r\n"
            },
            "pki-validation/": {
                "path": "/.well-known/pki-validation/",
                "status": 404,
                "present": false,
                "ms": 35,
                "preview": "<html>\r\n<head><title>404 Not Found</title></head>\r\n<body>\r\n<center><h1>404 Not Found</h1></center>\r\n<hr><center>nginx</center>\r\n</body>\r\n</html>\r\n"
            },
            "acme-challenge/": {
                "path": "/.well-known/acme-challenge/",
                "status": 404,
                "present": false,
                "ms": 33,
                "preview": "<html>\r\n<head><title>404 Not Found</title></head>\r\n<body>\r\n<center><h1>404 Not Found</h1></center>\r\n<hr><center>nginx</center>\r\n</body>\r\n</html>\r\n"
            }
        }
    },
    "source": "live",
    "meta": []
}

JSON endpoint

/api/v1/http/well-known?q=https%3A%2F%2Fhostinfo.com

curl

curl -s '/api/v1/http/well-known?q=https%3A%2F%2Fhostinfo.com'

How to use .well-known inspector

1

Paste your input

Enter the value at the top — domain, IP, URL, email, ASN, hash, whatever fits this tool. The smart input auto-detects type.
2

Click "Inspect"

host.tools issues real probes (DNS, HTTP, TCP, TLS, WHOIS where applicable) and renders the result in milliseconds.
3

Open the API tab

Every web tool has a sibling /api/v1/http/well-known JSON endpoint with the same payload. One copy-as-curl click and you're scripting it.

Why this matters

Headers are how the modern web declares its security posture. Auditing them is the highest-ROI thing you can do this week.

API equivalent

/api/v1/http/well-known?q=https%3A%2F%2Fhostinfo.com

curl -s '/api/v1/http/well-known?q=https%3A%2F%2Fhostinfo.com'

Embed this tool

<iframe src="/http/well-known?q={INPUT}&embed=1"
  width="100%" height="600" frameborder="0"></iframe>

Drop into any HTML page. The embed=1 flag hides nav and footer.

FAQ · .well-known inspector

Common questions

Is .well-known inspector free?

Yes — every tool is free on the web with a 200/hour rate limit per IP. The matching API endpoint /api/v1/http/well-known is free up to 100 requests/hour, no key required.

Where does the data come from?

Real-time probes against authoritative sources (DNS root, RIRs, registries, the target server itself), plus partner data feeds from hostinfo.com (GeoIP/ASN) and hostcheck.com (reputation).

How fresh are the results?

Live by default. Cached for 5 minutes to make repeat queries instant; pass ?nocache=1 for a forced refresh.

Can I run this from the command line?

Yes — every tool ships with a copy-as-curl. There's also an official CLI: host.tools http well-known YOUR_INPUT.

Can I monitor results over time?

Pro tier lets you schedule any tool to run every 1/5/15/60 min and alert on diff. See monitors.

host.tools Pro

Run .well-known inspector on a schedule. Get pinged when it changes.

Pro gets you bulk lookups, monitors, webhook alerts, history, exports and 10,000 API calls/day. $19/mo.

See pricing Tour monitors

✓Schedule any tool — every 1, 5, 15, 60 min
✓Diff against last run, alert on change
✓Webhook + email + Slack + PagerDuty + OpsGenie
✓Bulk CSV upload, 1,000 inputs per job
✓Export results as CSV / NDJSON / Excel
✓90-day history, comparison view