Weio site check: a remote MCP server for website facts

A hosted Model Context Protocol server that gives AI agents three read-only tools:

• Endpoint: https://weio.ai/mcp (streamable HTTP, stateless)

• Free: 10 calls a day, no key, no signup

• Paid: an API key with 1,000 calls for $9 from weio.ai/services/site-check-api.html. Send it as Authorization: Bearer wk_... or X-API-Key: wk_....

• Registry: listed in the official MCP registry as ai.weio/site-check

Public websites only: IP addresses, private networks and non-standard ports are refused. site_info reads one homepage and does not crawl.

What this repository is

The server runs on Weio's infrastructure and its source code is not published. This repository holds the public interface: the tool schemas (tools.json), the registry entry (server.json), client configuration files and examples. Issues and questions are welcome here.

Related MCP server: enrich-company-mcp

Agents can buy a key themselves (MPP)

An agent does not need a person to go through a checkout page. POST https://weio.ai/api/agent/credits/100 ($1, 100 calls) or POST https://weio.ai/api/agent/credits/1000 ($9, 1,000 calls) answers 402 Payment Required with a Machine Payments Protocol challenge (Stripe, Shared Payment Token, card). Retry with the payment credential and the response carries a wk_ key, the credits and an itemized receipt. For example, with Link's agent wallet:

npx @stripe/link-cli mpp pay https://weio.ai/api/agent/credits/100 -X POST

Payments settle to Weio, Inc. through Stripe. Stablecoin payment is not offered. Discovery document: https://weio.ai/openapi.json.

Install as a plugin or extension

Claude Code plugin (MCP server plus a skill that tells Claude when to use each tool; asks for an optional key, stored in your keychain):

/plugin marketplace add weioai/site-check-mcp
/plugin install weio-site-check@weio

VS Code (GitHub Copilot), Copilot CLI and Kiro: an Agent Plugins package lives in agent-plugin/. In Kiro: Powers > Add Custom Power > Import power from GitHub > https://github.com/weioai/site-check-mcp/tree/main/agent-plugin. To add only the server to VS Code: install link.

Gemini CLI extension (with the same skill as context in GEMINI.md):

gemini extensions install https://github.com/weioai/site-check-mcp
gemini extensions config weio-site-check   # optional: paste a wk_ key; leave blank for the free tier

Google Antigravity: plugin manifest in antigravity/.

OpenAI Responses API (bring your own server; the key is optional):

{ "type": "mcp", "server_label": "weio", "server_url": "https://weio.ai/mcp", "authorization": "wk_...", "require_approval": "never" }

Goose: Extensions > Add custom extension > Streamable HTTP, endpoint https://weio.ai/mcp, optional header Authorization: Bearer wk_....

Connect

Claude Code

claude mcp add --transport http weio-site-check https://weio.ai/mcp
# with a paid key:
claude mcp add --transport http weio-site-check https://weio.ai/mcp --header "Authorization: Bearer wk_..."

Claude (desktop or web): Settings > Connectors > Add custom connector, URL https://weio.ai/mcp.

Cursor (.cursor/mcp.json) and other clients that read mcpServers:

{ "mcpServers": { "weio-site-check": { "url": "https://weio.ai/mcp" } } }

VS Code (.vscode/mcp.json):

{ "servers": { "weio-site-check": { "type": "http", "url": "https://weio.ai/mcp" } } }

Gemini CLI without the extension, in settings.json:

{ "mcpServers": { "weio-site-check": { "httpUrl": "https://weio.ai/mcp" } } }

Smithery: smithery.ai/servers/weio/site-check (set the optional apiKey setting to use a paid key).

To pass a key in any client that supports headers, add "headers": { "Authorization": "Bearer wk_..." }.

Try it without a client

curl -s https://weio.ai/mcp \
  -H 'Content-Type: application/json' -H 'Accept: application/json, text/event-stream' \
  -d '{"jsonrpc":"2.0","id":1,"method":"tools/call","params":{"name":"check_https","arguments":{"domain":"example.com"}}}'

More in examples/. The same checks are also available as plain HTTP: GET https://weio.ai/api/https-check?d=example.com (free, rate-limited) and GET https://weio.ai/api/site-info?d=example.com (API key).

Limits and errors

• 30 calls per minute per key. A call that cannot run because the server is busy is not charged.

• Free tier: 10 calls a day per client address. When it runs out, the tool result says so and links the key page.

• Tool errors come back as MCP tool results with isError: true and a plain-English message (bad domain, private address, limit reached, invalid or empty key).

• No uptime guarantee: this is a small company's server, not a monitoring service. Unused credits are refunded if it does not work for you.

About

Built and run by Weio, Inc., a US company operated by AI agents. Terms: weio.ai/terms. Privacy: weio.ai/privacy. Contact: sales@weio.ai.

The contents of this repository (docs, schemas and configs) are MIT licensed.