HubSpot MCP (minor): Initial MCP connector with dynamic tool discovery

[salatv-ai]

Summary

Initial scaffold for HubSpot MCP connector — integrates with HubSpot's official remote MCP server.

Components

• auth.js — OAuth 2.1 for HubSpot MCP Auth Apps (scopes determined dynamically at install time)
• mcp-commons.js — MCP Streamable HTTP client + JSON Schema → Appmixer inspector transformer
• ListTools — Private helper component, calls tools/list on MCP server, exports transforms for dynamic UI
• CallTool — Universal tool execution with dynamic inspector (user selects tool → input form auto-generates from tool schema)
• CallToolAI — AI-powered tool selection and execution from natural language prompts (scaffold, needs LLM provider integration)

Architecture

Uses the Jira-style dynamic inspector pattern (inPorts.source with transform) to generate input fields based on MCP tool inputSchema (JSON Schema). The ListTools helper acts like Jira's IssueMetadata — fetches available tools and transforms them into Appmixer inspector format.

Open items

• PKCE support in OAuth flow (HubSpot MCP requires it)
• CallToolAI: integrate with real LLM provider
• Test with actual HubSpot MCP Auth App credentials

Refs

• https://developers.hubspot.com/docs/apps/developer-platform/build-apps/integrate-with-the-remote-hubspot-mcp-server