MCP · OAuth 2.1 · read-only

Ask Claude about your books.

Connect MapleBooks to Claude Desktop, Claude Code, or any MCP-capable client and query your transactions, GST/HST totals, tax reserve, and personal-tax estimates in plain English. Read-only, OAuth-scoped, audited.

Example questions.

"How much HST have I collected this quarter?" Hits gst_hst_summary; returns collected, possible ITCs, net remittance.
"Am I close to the $30K GST/HST threshold?" Hits gst_hst_threshold_status; returns rolling four-quarter revenue + alert level.
"What's my personal-tax set-aside for this year?" Hits personal_tax_estimate; returns total tax, marginal rate, recommended set-aside.
"Show me my biggest uncategorized expenses." Hits transactions_list filtered by classification + amount.
"How much have I paid my spouse in dividends YTD?" Hits remuneration_year_to_date; returns per-owner breakdown.
"What's my business-use % on the Civic this year?" Hits vehicle_summary; returns business km / total km + T2125 line 9281.

Connect Claude Desktop.

Open Claude Desktop's Settings → Connectors, click Add custom connector, and paste:

https://mcp.maplebooksapp.com/mcp

Claude will redirect you to MapleBooks to sign in and approve the requested scopes. After approval, every Claude session has access to your data via the tools above.

Connect Claude Code.

From your terminal:

claude mcp add --transport http maplebooks https://mcp.maplebooksapp.com/mcp

First call opens a browser tab to complete OAuth. Tokens refresh automatically.

Scopes we ask for.

  • read:transactions — list, search, filter your transactions and categories
  • read:tax_summaries — GST/HST summary, threshold status, tax reserve, personal-tax estimate
  • read:owners — list owners, year-to-date remuneration
  • read:vehicle — vehicle logbook + deduction summary

All scopes are read-only. Writes are deliberately deferred to a future version after we see how customers actually use this.

Security.

  • OAuth 2.1 with mandatory PKCE — no shared secrets stored in your MCP client
  • Tokens expire after 1 hour, refreshed automatically via the OAuth flow
  • Every tool call is recorded to your activity log; review and revoke at Settings → Connected apps
  • Discovery endpoints are public; tools require a bearer token tied to your user

Already a customer?

Add the connector above to start asking. New here? Pick a plan — MCP is included on Small Business.

See pricing