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is-port-11211-open
x402
is-port-11211-open is a paid API for AI agents from ip.intel.rallylive.ca, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-09).
Checks whether TCP port 11211 (Memcached) is open, closed, or filtered on a given host by attempting a connection from Cloudflare's edge network.
Price / call$0.01
Success—
StatusUnknown
How this service works
Is TCP port 9300 (Elasticsearch transport) open on a host? Attempts a connection from Cloudflare's edge and reports open/closed/filtered with the connect time; Cloudflare-fronted hosts are reported as inconclusive because their edge answers for them. Exposure checks for Elasticsearch transport without running a scanner. $0.01 per check.
Output
Returns whether TCP port 11211 is open, closed, or filtered on the target host, along with the connection time in milliseconds. If the host is fronted by Cloudflare's edge network, the result is flagged as inconclusive because Cloudflare answers on behalf of the origin, making the true port state indeterminate.
Example use cases
Security audit for Memcached exposure
“I need to verify that port 11211 isn't publicly accessible on our production server at api.mycompany.com — can you check if Memcached is exposed from the outside?”
Pre-deployment firewall validation
“Before we launch, can you confirm that port 11211 is blocked on the new server at 198.51.100.22? We don't want Memcached reachable from the internet.”
Incident response — suspicious Memcached traffic
“We're seeing unusual traffic and suspect Memcached amplification — can you check if port 11211 is open on 203.0.113.88 right now?”
Technical details
Endpoint
GEThttps://ip.intel.rallylive.ca/ip/port/11211?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a lightweight, no-infrastructure check for whether Memcached (port 11211) is publicly accessible on a specific host, without deploying your own port scanner. Ideal for security audits, firewall validation, and incident response where you want an external perspective from Cloudflare's edge. Not suitable for Cloudflare-fronted hosts (flagged as inconclusive) or when you need bulk scanning across many hosts simultaneously (use a bulk endpoint if available).
Side effects
- Host resolves to a Cloudflare IP — result is inconclusive rather than accurate
- Invalid hostname or IP format — request rejected
- Host is unreachable or DNS fails — may return filtered or error
- Network timeout — port may be reported as filtered even if open behind a slow firewall
- False negatives for hosts with rate-limiting or connection throttling
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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