# IP 出口检测

> IP 出口检测比较当前浏览器或 MCP 请求从不同网络路径观察到的公网出口信息。它不保存个人检测结果，也不把一次观测解释成网络配置诊断。

## When to use this service

Reach for IP 出口检测 when an agent needs to:

- read the public IP, country, region, city, ASN, or network organization observed for the current request;
- compare the public exit observed by domestic, ordinary-overseas, and restricted-overseas browser routes;
- inspect whether browser WebRTC exposes a public IP, check fixed-site resource connectivity, or measure download/upload speed after the user explicitly starts a test.

Do not use one result as proof of a device's precise physical location, the route of all traffic, the reachability of a particular third-party service, or the correctness of a proxy configuration.

## How to call it

- Current request observation: `GET https://ip.33338888.xyz/api/observe`. No authentication is required. The JSON response includes `ip`, `country`, `countryCode`, `region`, `city`, `organization`, `network`, and `colo`.
- Interactive browser tools: open `https://ip.33338888.xyz/` and let the user start the requested test. Tests run from the user's browser and remain in the current page session.
- MCP endpoint: connect to `https://ip.33338888.xyz/mcp` using Streamable HTTP. List tools and call `observe_ip` with `{}`. The tool returns a text fallback plus structured data and is linked to the MCP App resource `ui://ip-exit-observer/observe.html`.

## Developer resources

- [Developer hub](https://ip.33338888.xyz/developers/) — the canonical index for API and agent integrations.
- [OpenAPI specification](https://ip.33338888.xyz/openapi.json) — describes the unauthenticated `GET /api/observe` endpoint.
- [MCP manifest](https://ip.33338888.xyz/.well-known/mcp/manifest.json) — machine-readable server metadata and connection URL.
- [MCP server card](https://ip.33338888.xyz/.well-known/mcp/server-card.json) — server capabilities, tools, resources, and MCP Apps MIME type.
- [A2A agent card](https://ip.33338888.xyz/.well-known/agent-card.json) — describes the read-only A2A observation agent.
- [Agent Skills index](https://ip.33338888.xyz/.well-known/agent-skills/index.json) — machine-readable list of agent skills.
- MCP Apps resource: `ui://ip-exit-observer/observe.html` — interactive view for the `observe_ip` tool.

The public API and MCP server require no authentication. They observe only the request reaching this service; they do not provide a precise device location, diagnose proxy configuration, or represent every destination's network path.

## Public references

- [Homepage](https://ip.33338888.xyz/)
- [Agent-mode view](https://ip.33338888.xyz/?mode=agent)
- [Markdown agent documentation](https://ip.33338888.xyz/llms.md)
- [Methodology and privacy](https://ip.33338888.xyz/methodology)
- [Sitemap](https://ip.33338888.xyz/sitemap.xml)
- [MCP Apps extension](https://github.com/modelcontextprotocol/ext-apps)