Files
accounted/extensions/general/mcp-server/index.ts
T
Jakob WennbergandClaude Opus 4.6 5d66dd6bfc feat: MCP server, API keys, OAuth, and KPI dashboard (#72)
* fix: prevent Chrome auto-translate from crashing React during onboarding

Chrome auto-translate modifies DOM text nodes when it detects a Swedish
page (lang="sv") in a browser set to English. React does not expect
external DOM mutations and throws, crashing the entire component tree
into global-error.tsx on every step transition.

Add translate="no" and <meta name="google" content="notranslate"> to
suppress browser translation. Also fix timezone-unsafe date parsing in
fiscal period validation (new Date("YYYY-MM-DD") + getDate() returns
local-timezone values, shifting dates by -1 day in Western timezones).

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

* fix: add notranslate meta tag to global-error.tsx for consistency

Per review feedback — global-error.tsx renders its own <html> document,
so it needs the same <meta name="google" content="notranslate"> tag as
layout.tsx to fully suppress Chrome translation on error pages.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

* feat: add MCP server extension with OAuth, API keys, and KPI dashboard

Let users do bookkeeping through Claude Desktop, Claude Code, or any
MCP-compatible client. "Show my uncategorized transactions." "Book that
as office supplies." "Invoice Acme for 15,000 kr."

MCP server (extension):
- 10 tools: transactions, categorization, customers, invoices,
  trial balance, VAT report, KPI report, income statement
- JSON-RPC 2.0 protocol (no SDK dependency, works in serverless)
- Tool annotations, pagination, input validation per MCP best practices
- Same engine as web UI (VAT rules, exchange rates, event emission)

API key infrastructure (core):
- api_keys table with RLS, rate limiting (100 RPM), scopes column
- Atomic rate limit via DB RPC (validate_and_increment_api_key)
- Key management API routes + settings UI panel

OAuth 2.1 for Claude Desktop connectors:
- .well-known/oauth-protected-resource + oauth-authorization-server
- Authorization endpoint with consent page
- Token endpoint with PKCE verification
- Stateless encrypted auth codes (AES-256-GCM, no DB storage)
- Dynamic client registration

KPI dashboard:
- /nyckeltal page with hero cards, operational grid, trend chart
- GET /api/reports/kpi endpoint
- Gross margin, cash position, expense ratio, avg payment days,
  VAT liability, revenue/expense trend

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

* fix: address OAuth security vulnerabilities from code review

Critical fixes:
- Auth code replay: Track used codes in oauth_used_codes table with
  unique constraint. Codes are single-use per OAuth 2.1 §4.1.2.
- Open redirect: Validate redirect_uri against hardcoded allowlist
  of known Claude callback URLs + localhost for dev.

P1 fixes:
- Move API key creation from /authorize to /token endpoint. Keys are
  only created after PKCE verification, preventing orphaned keys on
  abandoned OAuth flows.
- Add ensureInitialized() to MCP server so event handlers load and
  transaction.categorized events reach extensions.

P2 fixes:
- Remove 'plain' from PKCE methods — only S256 is advertised and
  accepted.
- Fix extension count in sectors test (10 → 11 for mcp-server).

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

* fix: remove duplicate ensureInitialized() that caused circular import

The extension router (ext/[...path]/route.ts) already calls
ensureInitialized() before dispatching to handlers. The duplicate
call in server.ts created a circular import that Turbopack couldn't
resolve, breaking the Vercel build.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
2026-03-21 12:57:14 +01:00

46 lines
1.2 KiB
TypeScript

import type { Extension } from '@/lib/extensions/types'
import { handleMcpRequest } from './server'
export const mcpServerExtension: Extension = {
id: 'mcp-server',
name: 'MCP Server',
version: '1.0.0',
settingsPanel: {
label: 'MCP-server (API)',
path: '/settings?tab=api',
},
apiRoutes: [
{
method: 'POST',
path: '/mcp',
skipAuth: true, // Auth handled via API key in the handler
handler: handleMcpRequest,
},
// MCP Streamable HTTP also needs GET for SSE and DELETE for session termination
{
method: 'GET',
path: '/mcp',
skipAuth: true,
handler: async () => {
const appUrl = process.env.NEXT_PUBLIC_APP_URL || 'http://localhost:3000'
return new Response('Authorization required', {
status: 401,
headers: {
'WWW-Authenticate': `Bearer resource_metadata="${appUrl}/.well-known/oauth-protected-resource"`,
},
})
},
},
{
method: 'DELETE',
path: '/mcp',
skipAuth: true,
handler: async () => new Response(null, { status: 204 }), // Stateless — no sessions to terminate
},
],
eventHandlers: [],
}