diff --git a/src/daemon/http/index.ts b/src/daemon/http/index.ts
index 1ed8a3e..417e0ee 100644
--- a/src/daemon/http/index.ts
+++ b/src/daemon/http/index.ts
@@ -16,6 +16,7 @@ import {
 } from "../wallet/cocod-client";
 import { decodeCashuTokenAmount } from "../wallet";
 import { getClientsFromStore } from "../../utils/clients";
+import { getUsageSummary } from "./usage-summary";
 
 type ClientMode = "xcashu" | "lazyrefund" | "apikeys";
 
@@ -1123,6 +1124,18 @@ export function createDaemonRequestHandler(deps: {
       return;
     }
 
+    if (req.method === "GET" && url.pathname === "/usage/summary") {
+      try {
+        const tz = Number.parseInt(url.searchParams.get("tz") || "0", 10) || 0;
+        const clients = getClientsFromStore(deps.store);
+        const summary = await getUsageSummary(deps.usageTrackingDriver, clients, tz);
+        sendJson(res, 200, { output: summary });
+      } catch (error) {
+        sendJson(res, 500, { error: toErrorMessage(error) });
+      }
+      return;
+    }
+
     if (req.method === "GET" && url.pathname === "/usagePi") {
       try {
         const timestamp = (url.searchParams.get("timestamp") || "").trim();
diff --git a/src/daemon/http/usage-summary.ts b/src/daemon/http/usage-summary.ts
new file mode 100644
index 0000000..ccd3023
--- /dev/null
+++ b/src/daemon/http/usage-summary.ts
@@ -0,0 +1,302 @@
+import type {
+  UsageAggregateRow,
+  UsageTrackingDriver,
+  UsageTrackingEntry,
+} from "@routstr/sdk/storage";
+import type { ClientEntry } from "../../utils/clients";
+
+// ─── Public shape ────────────────────────────────────────────────────────────
+
+export interface StatRow {
+  requests: number;
+  promptTokens: number;
+  completionTokens: number;
+  totalTokens: number;
+  cost: number;
+  satsCost: number;
+}
+
+export interface ModelSummary extends StatRow {
+  modelId: string;
+}
+
+export interface ProviderSummary extends StatRow {
+  baseUrl: string;
+}
+
+export interface TopModel {
+  modelId: string;
+  requests: number;
+  satsCost: number;
+  totalTokens: number;
+}
+
+export interface ClientSummary extends StatRow {
+  client: string;
+  topModels: TopModel[];
+}
+
+export interface NpubSummary extends StatRow {
+  npub: string;
+  topModels: TopModel[];
+}
+
+export interface DaySummary extends StatRow {
+  date: string; // "YYYY-MM-DD"
+}
+
+export interface HourSummary extends StatRow {
+  hour: number; // 0..23
+}
+
+export interface SizeBucket {
+  count: number;
+  cost: number; // summed satsCost
+}
+
+export interface UsageSummary {
+  generatedAt: number;
+  totals: StatRow;
+  models: ModelSummary[];
+  providers: ProviderSummary[];
+  clients: ClientSummary[];
+  npubs: NpubSummary[];
+  days: DaySummary[];
+  hoursToday: HourSummary[];
+  sizeBuckets: {
+    tiny: SizeBucket;
+    small: SizeBucket;
+    medium: SizeBucket;
+    large: SizeBucket;
+    huge: SizeBucket;
+  };
+  recent: UsageTrackingEntry[];
+}
+
+// ─── Helpers ─────────────────────────────────────────────────────────────────
+
+function rowToStat(r: UsageAggregateRow): StatRow {
+  return {
+    requests: r.requests,
+    promptTokens: r.promptTokens,
+    completionTokens: r.completionTokens,
+    totalTokens: r.totalTokens,
+    cost: r.cost,
+    satsCost: r.satsCost,
+  };
+}
+
+function rowToTopModel(r: UsageAggregateRow): TopModel {
+  return {
+    modelId: r.group ?? "unknown",
+    requests: r.requests,
+    satsCost: r.satsCost,
+    totalTokens: r.totalTokens,
+  };
+}
+
+function emptyBucket(): SizeBucket {
+  return { count: 0, cost: 0 };
+}
+
+function bucketFromRow(r: UsageAggregateRow | undefined): SizeBucket {
+  if (!r) return emptyBucket();
+  return { count: r.requests, cost: r.satsCost };
+}
+
+/** Returns the UTC ms for the start of the local day containing `now`. */
+function startOfLocalDayUtc(now: number, tzOffsetMinutes: number): number {
+  return (
+    Math.floor((now - tzOffsetMinutes * 60000) / 86400000) * 86400000 +
+    tzOffsetMinutes * 60000
+  );
+}
+
+// ─── Module-level memo cache ─────────────────────────────────────────────────
+
+interface CacheEntry {
+  key: string;
+  summary: UsageSummary;
+}
+
+let _cache: CacheEntry | null = null;
+const CACHE_TTL_MS = 60_000;
+
+// ─── Main builder ─────────────────────────────────────────────────────────────
+
+export async function getUsageSummary(
+  driver: UsageTrackingDriver,
+  clients: ClientEntry[],
+  tzOffsetMinutes: number,
+): Promise<UsageSummary> {
+  // Cheap cache key: total row count + clients length + tz
+  const count = await driver.count();
+  const cacheKey = `${count}:${clients.length}:${tzOffsetMinutes}`;
+  const now = Date.now();
+
+  if (
+    _cache !== null &&
+    _cache.key === cacheKey &&
+    now - _cache.summary.generatedAt <= CACHE_TTL_MS
+  ) {
+    return _cache.summary;
+  }
+
+  // ── Totals ─────────────────────────────────────────────────────────────────
+  const [totalsRow] = await driver.aggregate({});
+  const totals: StatRow = totalsRow ? rowToStat(totalsRow) : {
+    requests: 0, promptTokens: 0, completionTokens: 0,
+    totalTokens: 0, cost: 0, satsCost: 0,
+  };
+
+  // ── Models ─────────────────────────────────────────────────────────────────
+  const modelRows = await driver.aggregate({ groupBy: "modelId" });
+  const models: ModelSummary[] = modelRows.map((r) => ({
+    modelId: r.group ?? "unknown",
+    ...rowToStat(r),
+  }));
+
+  // ── Providers ──────────────────────────────────────────────────────────────
+  const providerRows = await driver.aggregate({ groupBy: "baseUrl" });
+  const providers: ProviderSummary[] = providerRows.map((r) => ({
+    baseUrl: r.group ?? "unknown",
+    ...rowToStat(r),
+  }));
+
+  // ── Clients ────────────────────────────────────────────────────────────────
+  const clientRows = await driver.aggregate({ groupBy: "client" });
+  const clientSummaries: ClientSummary[] = clientRows.map((r) => ({
+    client: r.group ?? "unknown",
+    ...rowToStat(r),
+    topModels: [],
+  }));
+
+  // Fill topModels for the top 3 non-null client rows
+  const topClientRows = clientRows
+    .filter((r) => r.group !== null)
+    .slice(0, 3);
+  for (let i = 0; i < topClientRows.length; i++) {
+    const clientId = topClientRows[i]!.group!;
+    const topModelRows = await driver.aggregate({
+      groupBy: "modelId",
+      client: clientId,
+    });
+    // Find matching ClientSummary and set topModels
+    const summary = clientSummaries.find((c) => c.client === clientId);
+    if (summary) {
+      summary.topModels = topModelRows.slice(0, 5).map(rowToTopModel);
+    }
+  }
+
+  // ── Npubs ──────────────────────────────────────────────────────────────────
+  // Build clientId → ownerNpub lookup (only clients with ownerNpub)
+  const clientToNpub = new Map<string, string>();
+  for (const c of clients) {
+    if (c.ownerNpub) {
+      clientToNpub.set(c.clientId, c.ownerNpub);
+    }
+  }
+
+  // Fold client rows into per-npub sums
+  const npubStats = new Map<string, StatRow>();
+  const npubClientIds = new Map<string, string[]>();
+  for (const r of clientRows) {
+    if (r.group === null) continue;
+    const npub = clientToNpub.get(r.group);
+    if (!npub) continue;
+    const existing = npubStats.get(npub);
+    if (existing) {
+      existing.requests += r.requests;
+      existing.promptTokens += r.promptTokens;
+      existing.completionTokens += r.completionTokens;
+      existing.totalTokens += r.totalTokens;
+      existing.cost += r.cost;
+      existing.satsCost += r.satsCost;
+    } else {
+      npubStats.set(npub, { ...rowToStat(r) });
+    }
+    const ids = npubClientIds.get(npub) ?? [];
+    ids.push(r.group);
+    npubClientIds.set(npub, ids);
+  }
+
+  // Sort npubs desc by satsCost
+  const sortedNpubs = [...npubStats.entries()].sort(
+    (a, b) => b[1].satsCost - a[1].satsCost,
+  );
+
+  const npubs: NpubSummary[] = sortedNpubs.map(([npub, stat]) => ({
+    npub,
+    ...stat,
+    topModels: [],
+  }));
+
+  // Fill topModels for top 5 npubs
+  for (let i = 0; i < Math.min(5, npubs.length); i++) {
+    const npubSummary = npubs[i]!;
+    const ids = npubClientIds.get(npubSummary.npub) ?? [];
+    if (ids.length > 0) {
+      const topModelRows = await driver.aggregate({
+        groupBy: "modelId",
+        clients: ids,
+      });
+      npubSummary.topModels = topModelRows.slice(0, 5).map(rowToTopModel);
+    }
+  }
+
+  // ── Days (last 30, most-recent-first) ─────────────────────────────────────
+  const dayRows = await driver.aggregate({
+    groupBy: "day",
+    tzOffsetMinutes,
+    after: now - 30 * 86400000,
+  });
+  const days: DaySummary[] = dayRows
+    .map((r) => ({ date: r.group!, ...rowToStat(r) }))
+    .reverse(); // aggregate returns ascending; we want most-recent-first
+
+  // ── Hours today ────────────────────────────────────────────────────────────
+  const todayStartUtc = startOfLocalDayUtc(now, tzOffsetMinutes);
+  const hourRows = await driver.aggregate({
+    groupBy: "hour",
+    tzOffsetMinutes,
+    after: todayStartUtc - 1,
+  });
+  const hoursToday: HourSummary[] = hourRows.map((r) => ({
+    hour: Number(r.group),
+    ...rowToStat(r),
+  }));
+
+  // ── Size buckets ───────────────────────────────────────────────────────────
+  const [tinyRow] = await driver.aggregate({ minTotalTokens: 0, maxTotalTokens: 1000 });
+  const [smallRow] = await driver.aggregate({ minTotalTokens: 1000, maxTotalTokens: 10000 });
+  const [mediumRow] = await driver.aggregate({ minTotalTokens: 10000, maxTotalTokens: 50000 });
+  const [largeRow] = await driver.aggregate({ minTotalTokens: 50000, maxTotalTokens: 100000 });
+  const [hugeRow] = await driver.aggregate({ minTotalTokens: 100000 });
+
+  const sizeBuckets = {
+    tiny: bucketFromRow(tinyRow),
+    small: bucketFromRow(smallRow),
+    medium: bucketFromRow(mediumRow),
+    large: bucketFromRow(largeRow),
+    huge: bucketFromRow(hugeRow),
+  };
+
+  // ── Recent entries ─────────────────────────────────────────────────────────
+  const recent = await driver.list({ limit: 50 });
+
+  const summary: UsageSummary = {
+    generatedAt: now,
+    totals,
+    models,
+    providers,
+    clients: clientSummaries,
+    npubs,
+    days,
+    hoursToday,
+    sizeBuckets,
+    recent,
+  };
+
+  _cache = { key: cacheKey, summary };
+  return summary;
+}