Weio site check: a remote MCP server for website facts

A hosted Model Context Protocol server. This repository documents its read-only check_https tool.

Status: this repository documents Weio's original site-check MCP tools. The hosted server at https://weio.ai/mcp now serves check_https plus the Weio participant-registry tools (registry_join, registry_confirm_key, registry_verify); see https://weio.ai/spec/ for those. find_businesses has been retired. No keys are sold.

Tool	What it returns
check_https(domain)	For example.com and www.example.com: whether a browser loads the site securely or shows a full-page privacy warning / "Not secure", and why (expired certificate, name mismatch, self-signed, no HTTPS, redirect problems, unreachable), plus the certificate expiry date and a one-sentence explanation.

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

• check_https needs no key.

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: lilAgents MCP

Use the same checks through your existing platform account

These routes are alternatives for teams that already use RapidAPI or Apify. They bill through that platform's account and never send you to a Weio checkout. They are separate services from the hosted weio.ai/mcp server above.

RapidAPI MCP. RapidAPI makes each of these APIs available as MCP tools at https://mcp.rapidapi.com. Use your own RapidAPI key and plan; see each API's pricing page for current plan terms.

# Claude Code: repeat with any host in the list below.
claude mcp add --transport http rapidapi-site-check https://mcp.rapidapi.com \
  --header "x-api-host: website-facts-and-https-check.p.rapidapi.com" \
  --header "x-rapidapi-key: YOUR_RAPIDAPI_KEY"

# Desktop clients that run a local stdio bridge, such as Cursor:
npx mcp-remote https://mcp.rapidapi.com \
  --header "x-api-host: website-facts-and-https-check.p.rapidapi.com" \
  --header "x-rapidapi-key: YOUR_RAPIDAPI_KEY"

Choose one x-api-host: website facts + HTTPS check, domain and email security, website technology detector, or website contact details extractor. Their host values are respectively website-facts-and-https-check.p.rapidapi.com, domain-email-security-spf-dmarc-mx-whois.p.rapidapi.com, website-technology-detector-cms-ecommerce-analytics.p.rapidapi.com, and website-contact-details-extractor-emails-phones-socials.p.rapidapi.com.

Apify MCP. Apify exposes each actor as tools through https://mcp.apify.com; use an Apify API token from your own account. Pay-per-event charges, if an actor has them, are billed by Apify to that account.

claude mcp add --transport http apify-weio-tech-stack \
  'https://mcp.apify.com?tools=weio/website-tech-stack-detector' \
  --header "Authorization: Bearer YOUR_APIFY_TOKEN"

npx mcp-remote 'https://mcp.apify.com?tools=weio/website-tech-stack-detector' \
  --header "Authorization: Bearer YOUR_APIFY_TOKEN"

Available Weio actor tool routes: weio/hacked-website-seo-spam-checker, weio/local-business-website-lead-qualifier, weio/local-business-website-audit, weio/website-contact-details-extractor, weio/website-tech-stack-detector, weio/domain-whois-dns-email-security-checker, weio/lighthouse-mobile-median-audit, weio/broken-link-checker-bulk, weio/website-screenshot-phone-desktop, and weio/website-to-pdf-bulk.

Install as a plugin or extension

Claude Code plugin (MCP server plus a skill that tells Claude when to use each tool):

/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

Google Antigravity: plugin manifest in antigravity/.

OpenAI Responses API (bring your own server):

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

Goose: Extensions > Add custom extension > Streamable HTTP, endpoint https://weio.ai/mcp.

Connect

Claude Code

claude mcp add --transport http weio-site-check https://weio.ai/mcp

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.

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/.

Limits and errors

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

• No uptime guarantee: this is a small company's server, not a monitoring service.

About

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

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