feat(mcp): Publish MCP server to mcp.so directory

[owenwahlgren]

Summary

Publish the Builders Hub MCP server to mcp.so and ensure external clients (Claude Desktop, Cursor) can connect.

Tasks

1. Publish to mcp.so

Submit server with:

• Name: avalanche-docs
• Endpoint: https://build.avax.network/api/mcp
• Tools: avalanche_docs_search, avalanche_docs_fetch, avalanche_docs_list_sections
• Categories: documentation, blockchain, developer-tools

2. Enable External Access

• Configure CORS for cross-origin requests
• Add health check endpoint (GET /api/mcp)
• Add rate limiting (60 req/min per client)
• Track external client connections

3. Create Documentation

Add docs page showing how to connect from:

• Claude Desktop
• Cursor IDE
• Other MCP clients

4. Add MCP Manifest

Create /public/mcp-manifest.json for discovery.

Files to Modify

• app/api/mcp/route.ts - CORS, health check, rate limiting
• lib/mcp-rate-limit.ts (new) - Rate limiting
• content/docs/tools/mcp-server.mdx (new) - Integration docs
• public/mcp-manifest.json (new) - Server manifest

Acceptance Criteria

• Listed on mcp.so directory
• CORS configured for external requests
• Health check returns server status
• Rate limiting prevents abuse
• Documentation page created
• Works with Claude Desktop (tested)
• Works with Cursor (tested)
• External connections tracked in PostHog

Target

50 unique external MCP clients within 30 days

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Part of AI/MCP Roadmap Phase 1