Founder GuideClaude MCP

Run your raise from Claude.

Arx exposes your founder workspace — cap table, investor pipeline, data room, pitch deck analytics, forecast, and updates — as a remote MCP server. Connect once from any Claude client that supports custom connectors.

Connector URL

Production endpoint (Streamable HTTP, OAuth 2.1):

https://api.foundersarx.com/mcp/v1

You can also copy this URL from Settings → Integrations inside the app.

Setup

  1. Sign in to Arx at app.foundersarx.com (workspace owner or admin).
  2. Open Claude → Settings → Connectors → Add custom connector.
  3. Paste the connector URL: https://api.foundersarx.com/mcp/v1
  4. When Claude opens your browser, sign in to Arx if needed and click Allow access on the consent screen.
  5. Return to Claude — four gateway tools load immediately; workspace tools are discovered via search.

Gateway workflow

Arx lists four gateway tools so Claude can discover ~70 workspace tools without loading every schema upfront:

  • search_arx_tools — find tools by keyword
  • get_arx_tool_schema — load exact parameter names
  • call_arx_tool — execute a workspace tool
  • confirm_arx_tool — persist a mutating proposal

Typical flow: search → schema → call. Mutating tools return pending_confirmation; nothing is written until Claude calls confirm_arx_tool with the exact payload.

OAuth scopes

  • tools:read — read-only workspace tools
  • tools:write — mutating tools and confirmation
  • company:read — workspace context

Revoke access anytime from Settings → Integrations → Revoke access.

AI access toggles

Workspace owners control which data domains Claude can read at Settings → Account → AI access (cap table, investors, data room, pitch deck, updates, forecast, company profile, integrations). MCP respects the same toggles as in-app Ask Arx.

Example prompts

  • Search my Arx tools for data rooms and list them
  • Use get_arx_tool_schema for cap_table_get_state, then summarize my cap table
  • Who viewed my pitch decks recently?
  • Draft this month's investor update

Privacy & support

MCP tool calls are scoped to your workspace and may be processed by Anthropic or OpenAI when you use Claude — see our privacy policy (sections on Ask Arx and MCP). Questions: hi@foundersarx.com.

Integrations feature overview · Founder Guide home