# is-port-80-open

> is-port-80-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 2026-10-11).

Checks whether TCP port 80 (HTTP) is open, closed, or filtered on a given host by attempting a connection from Cloudflare's edge network and reporting the result with connect time.

## Facts

- Endpoint: GET https://ip.intel.rallylive.ca/ip/port/80?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-11
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/is-port-80-open-0e5bfd41
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_5e29sw_QdmASR410pjmFR

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 is-port-80-open-0e5bfd41
```

Example prompt: Can you check whether port 80 (HTTP) is open or closed on the host api.example.com — I want to know if it's externally reachable for HTTP traffic without running a full scanner?

## When to prefer this

Choose this endpoint when you need a lightweight, external check of HTTP (port 80) reachability on a host without deploying or running a port scanner. It is ideal for pre-launch checks, security audits to detect unintended HTTP exposure, or infrastructure monitoring where you want an external vantage point (Cloudflare's edge). Use it over a full scanner when you only need port 80 and want a fast, single-call result with connect time. Note the inconclusive limitation for Cloudflare-fronted hosts.

## Known failure modes

- Host is Cloudflare-fronted — result reported as inconclusive because Cloudflare's edge answers the connection rather than the origin
- Host is unreachable or DNS does not resolve — connection attempt fails and filtered/closed is reported
- Firewall silently drops packets — port appears filtered rather than closed
- Transient network issues at Cloudflare's edge may cause false negatives
- Invalid or malformed hostname/IP input causes request rejection

## How this service works

Is TCP port 80 (HTTP) 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 HTTP without running a scanner. $0.01 per check.

## Output

Returns the port status as open, closed, filtered, or inconclusive (the last for Cloudflare-fronted hosts where Cloudflare's edge answers instead of the actual host), along with the TCP connect time in milliseconds when a connection succeeds.

## 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/is-port-80-open-0e5bfd41/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from ip.intel.rallylive.ca](https://www.zero.xyz/host/ip.intel.rallylive.ca/llms.txt)