feat(billing): expose credit usage log in Billing settings

apps/sim/app/api/users/me/usage-logs/route.test.ts

@@ -0,0 +1,90 @@
+/**
+ * @vitest-environment node
+ */
+import { authMockFns, createMockRequest } from '@sim/testing'
+import { beforeEach, describe, expect, it, vi } from 'vitest'
+
+const { mockGetUserUsageLogs } = vi.hoisted(() => ({
+  mockGetUserUsageLogs: vi.fn(),
+}))
+
+vi.mock('@/lib/billing/core/usage-log', () => ({
+  getUserUsageLogs: mockGetUserUsageLogs,
+}))
+
+import { GET } from '@/app/api/users/me/usage-logs/route'
+
+describe('GET /api/users/me/usage-logs', () => {
+  beforeEach(() => {
+    vi.clearAllMocks()
+    authMockFns.mockGetSession.mockResolvedValue({ user: { id: 'user-1' } })
+    mockGetUserUsageLogs.mockResolvedValue({
+      logs: [
+        {
+          id: 'log-1',
+          createdAt: '2026-07-01T00:00:00.000Z',
+          category: 'model',
+          source: 'workflow',
+          description: 'gpt-4o',
+          cost: 0.5,
+        },
+      ],
+      summary: { totalCost: 0.5, bySource: { workflow: 0.5 } },
+      pagination: { hasMore: false },
+    })
+  })
+
+  it('returns 401 when unauthenticated', async () => {
+    authMockFns.mockGetSession.mockResolvedValue(null)
+
+    const response = await GET(createMockRequest('GET'))
+
+    expect(response.status).toBe(401)
+  })
+
+  it('converts dollar costs to credits in the logs and summary', async () => {
+    const response = await GET(createMockRequest('GET'))
+    const body = await response.json()
+
+    expect(body.logs).toEqual([
+      {
+        id: 'log-1',
+        createdAt: '2026-07-01T00:00:00.000Z',
+        source: 'workflow',
+        description: 'gpt-4o',
+        creditCost: 100,
+      },
+    ])
+    expect(body.summary).toEqual({
+      totalCredits: 100,
+      bySourceCredits: { workflow: 100 },
+    })
+  })
+
+  it('rejects an invalid period', async () => {
+    const response = await GET(
+      createMockRequest('GET', undefined, {}, 'http://localhost:3000/api/test?period=1y')
+    )
+
+    expect(response.status).toBe(400)
+    expect(mockGetUserUsageLogs).not.toHaveBeenCalled()
+  })
+
+  it('resolves the start date from the period filter', async () => {
+    await GET(createMockRequest('GET', undefined, {}, 'http://localhost:3000/api/test?period=7d'))
+
+    expect(mockGetUserUsageLogs).toHaveBeenCalledWith(
+      'user-1',
+      expect.objectContaining({ startDate: expect.any(Date) })
+    )
+  })
+
+  it('omits the start date for the "all" period', async () => {
+    await GET(createMockRequest('GET', undefined, {}, 'http://localhost:3000/api/test?period=all'))
+
+    expect(mockGetUserUsageLogs).toHaveBeenCalledWith(
+      'user-1',
+      expect.objectContaining({ startDate: undefined })
+    )
+  })
+})

apps/sim/app/api/users/me/usage-logs/route.ts

@@ -1,116 +1,76 @@
 import { createLogger } from '@sim/logger'
-import { toError } from '@sim/utils/errors'
 import { type NextRequest, NextResponse } from 'next/server'
-import { usageLogsQuerySchema } from '@/lib/api/contracts/user'
+import { getUsageLogsContract } from '@/lib/api/contracts/user'
+import { parseRequest } from '@/lib/api/server'
 import { checkSessionOrInternalAuth } from '@/lib/auth/hybrid'
 import { getUserUsageLogs, type UsageLogSource } from '@/lib/billing/core/usage-log'
 import { dollarsToCredits } from '@/lib/billing/credits/conversion'
 import { withRouteHandler } from '@/lib/core/utils/with-route-handler'
 
 const logger = createLogger('UsageLogsAPI')
 
-/**
- * GET /api/users/me/usage-logs
- * Get usage logs for the authenticated user
- */
-export const GET = withRouteHandler(async (req: NextRequest) => {
-  try {
-    const auth = await checkSessionOrInternalAuth(req, { requireWorkflowId: false })
-
-    if (!auth.success || !auth.userId) {
-      return NextResponse.json({ error: 'Unauthorized' }, { status: 401 })
-    }
-
-    const userId = auth.userId
-
-    const { searchParams } = new URL(req.url)
-    const queryParams = {
-      source: searchParams.get('source') || undefined,
-      workspaceId: searchParams.get('workspaceId') || undefined,
-      period: searchParams.get('period') || '30d',
-      limit: searchParams.get('limit') || '50',
-      cursor: searchParams.get('cursor') || undefined,
-    }
-
-    const validation = usageLogsQuerySchema.safeParse(queryParams)
-
-    if (!validation.success) {
-      return NextResponse.json(
-        {
-          error: 'Invalid query parameters',
-          details: validation.error.issues,
-        },
-        { status: 400 }
-      )
-    }
-
-    const { source, workspaceId, period, limit, cursor } = validation.data
-
-    let startDate: Date | undefined
-    const endDate = new Date()
+const PERIOD_TO_DAYS: Record<'1d' | '7d' | '30d', number> = { '1d': 1, '7d': 7, '30d': 30 }
 
-    if (period !== 'all') {
-      startDate = new Date()
-      switch (period) {
-        case '1d':
-          startDate.setDate(startDate.getDate() - 1)
-          break
-        case '7d':
-          startDate.setDate(startDate.getDate() - 7)
-          break
-        case '30d':
-          startDate.setDate(startDate.getDate() - 30)
-          break
-      }
-    }
+function resolveStartDate(period: '1d' | '7d' | '30d' | 'all'): Date | undefined {
+  if (period === 'all') return undefined
+  const startDate = new Date()
+  startDate.setDate(startDate.getDate() - PERIOD_TO_DAYS[period])
+  return startDate
+}
 
-    const result = await getUserUsageLogs(userId, {
-      source: source as UsageLogSource | undefined,
-      workspaceId,
-      startDate,
-      endDate,
-      limit,
-      cursor,
-    })
-
-    const logsWithCredits = result.logs.map((log) => ({
-      ...log,
-      creditCost: dollarsToCredits(log.cost),
-    }))
-
-    const bySourceCredits: Record<string, number> = {}
-    for (const [src, cost] of Object.entries(result.summary.bySource)) {
-      bySourceCredits[src] = dollarsToCredits(cost)
-    }
-
-    logger.debug('Retrieved usage logs', {
-      userId,
-      source,
-      period,
-      logCount: result.logs.length,
-      hasMore: result.pagination.hasMore,
-    })
-
-    return NextResponse.json({
-      success: true,
-      logs: logsWithCredits,
-      summary: {
-        ...result.summary,
-        totalCostCredits: dollarsToCredits(result.summary.totalCost),
-        bySourceCredits,
-      },
-      pagination: result.pagination,
-    })
-  } catch (error) {
-    logger.error('Failed to get usage logs', {
-      error: toError(error).message,
-    })
-
-    return NextResponse.json(
-      {
-        error: 'Failed to retrieve usage logs',
-      },
-      { status: 500 }
-    )
+/**
+ * Lists the authenticated user's credit-consuming usage events (model, tool,
+ * and fixed charges), converted to credits for display in Billing settings.
+ */
+export const GET = withRouteHandler(async (request: NextRequest) => {
+  const auth = await checkSessionOrInternalAuth(request, { requireWorkflowId: false })
+  if (!auth.success || !auth.userId) {
+    return NextResponse.json({ error: 'Unauthorized' }, { status: 401 })
   }
+
+  const parsed = await parseRequest(getUsageLogsContract, request, {})
+  if (!parsed.success) return parsed.response
+  const { source, workspaceId, period, limit, cursor } = parsed.data.query
+
+  const result = await getUserUsageLogs(auth.userId, {
+    source: source as UsageLogSource | undefined,
+    workspaceId,
+    startDate: resolveStartDate(period),
+    endDate: new Date(),
+    limit,
+    cursor,
+  })
+
+  const logs = result.logs.map((log) => ({
+    id: log.id,
+    createdAt: log.createdAt,
+    source: log.source,
+    description: log.description,
+    creditCost: dollarsToCredits(log.cost),
+  }))
+
+  const bySourceCredits = Object.fromEntries(
+    Object.entries(result.summary.bySource).map(([sourceKey, cost]) => [
+      sourceKey,
+      dollarsToCredits(cost),
+    ])
+  )
+
+  logger.debug('Retrieved usage logs', {
+    userId: auth.userId,
+    source,
+    period,
+    logCount: logs.length,
+    hasMore: result.pagination.hasMore,
+  })
+
+  return NextResponse.json({
+    success: true,
+    logs,
+    summary: {
+      totalCredits: dollarsToCredits(result.summary.totalCost),
+      bySourceCredits,
+    },
+    pagination: result.pagination,
+  })
 })

apps/sim/app/workspace/[workspaceId]/settings/components/billing/billing.tsx

@@ -42,6 +42,7 @@ import {
 } from '@/lib/billing/subscriptions/utils'
 import { buildUpgradeHref } from '@/lib/billing/upgrade-reasons'
 import { getBaseUrl } from '@/lib/core/utils/urls'
+import { CreditUsageSection } from '@/app/workspace/[workspaceId]/settings/components/billing/components/credit-usage-section/credit-usage-section'
 import { UsageLimitField } from '@/app/workspace/[workspaceId]/settings/components/billing/components/usage-limit-field/usage-limit-field'
 import { getSubscriptionPermissions } from '@/app/workspace/[workspaceId]/settings/components/billing/subscription-permissions'
 import { SettingsPanel } from '@/app/workspace/[workspaceId]/settings/components/settings-panel'
@@ -640,6 +641,8 @@ export function Billing() {
           </div>
         </SettingsSection>
       )}
+
+      {!subscription.isEnterprise && <CreditUsageSection />}
     </SettingsPanel>
   )
 }