diff --git a/web/src/app/api/dashboard/route.ts b/web/src/app/api/dashboard/route.ts
index 7514ec45..dc1a7271 100644
--- a/web/src/app/api/dashboard/route.ts
+++ b/web/src/app/api/dashboard/route.ts
@@ -17,14 +17,14 @@ export async function GET(req: NextRequest) {
   let patronTalosIds = [];
   try {
     patronTalosIds = await withTimeout(
-      db.select({ talosId: tlsPatrons.talosId }).from(tlsPatrons).where(eq(tlsPatrons.stellarPublicKey, addr)),
+      db.select({ talosId: tlsPatrons.talosId }).from(tlsPatrons).where(eq(tlsPatrons.stellarPublicKey, addr)).limit(100),
       25000,
       "Dashboard patron query timeout",
     );
   } catch (error) {
     if (error instanceof TimeoutError) {
       return NextResponse.json(
-        { error: "Query timeout. Please try again with a simpler query.", details: error.message },
+        { error: "Query timeout. Please try again with a simpler query." },
         { status: 408 },
       );
     }
@@ -51,11 +51,12 @@ export async function GET(req: NextRequest) {
     talosRows = await withTimeout(
       db.query.tlsTalos.findMany({
         where: whereCondition,
+        limit: 100,
         with: {
-          approvals: { orderBy: (a, { desc: d }) => [d(a.createdAt)] },
+          approvals: { orderBy: (a, { desc: d }) => [d(a.createdAt)], limit: 50 },
           activities: { orderBy: (a, { desc: d }) => [d(a.createdAt)], limit: 10 },
-          revenues: { orderBy: (r, { desc: d }) => [d(r.createdAt)] },
-          patrons: true,
+          revenues: { orderBy: (r, { desc: d }) => [d(r.createdAt)], limit: 50 },
+          patrons: { limit: 50 },
         },
       }),
       30000,
@@ -64,7 +65,7 @@ export async function GET(req: NextRequest) {
   } catch (error) {
     if (error instanceof TimeoutError) {
       return NextResponse.json(
-        { error: "Query timeout. Please try again with a simpler query.", details: error.message },
+        { error: "Query timeout. Please try again with a simpler query." },
         { status: 408 },
       );
     }
diff --git a/web/src/app/api/ecosystem-intelligence/route.ts b/web/src/app/api/ecosystem-intelligence/route.ts
index 2c8b22df..1c2b5065 100644
--- a/web/src/app/api/ecosystem-intelligence/route.ts
+++ b/web/src/app/api/ecosystem-intelligence/route.ts
@@ -18,6 +18,7 @@ import {
   suppressSparseRecord,
   suppressSparseRows,
 } from "@/lib/analytics-privacy";
+import { parseAnalyticsLimit } from "@/lib/analytics-limits";
 
 export const dynamic = 'force-dynamic';
 
@@ -109,6 +110,13 @@ export async function GET(req: Request) {
   // if (!wallet) {
   //   return NextResponse.json({ error: "wallet parameter required" }, { status: 400 });
   // }
+
+  const url = new URL(req.url);
+  const parsedLimit = parseAnalyticsLimit(url.searchParams.get("limit"), 10, 50);
+  if (!parsedLimit.ok) {
+    return parsedLimit.response;
+  }
+  const detailedLimit = parsedLimit.limit;
   
   try {
     const now = new Date();
@@ -309,7 +317,7 @@ export async function GET(req: Request) {
     );
     const byAgent = visibleByAgent.rows
       .sort((a, b) => b.completionRate - a.completionRate)
-      .slice(0, 10);
+      .slice(0, detailedLimit);
 
     // Opportunity metrics
     // Calculate demand vs supply by category
@@ -351,7 +359,7 @@ export async function GET(req: Request) {
       row => categoryCohortSizes[row.category] ?? 0,
     );
     const underservedCategories = visibleUnderservedCategories.rows
-      .slice(0, 5);
+      .slice(0, Math.min(detailedLimit, 5));
 
     // Trending agents (by revenue growth)
     const agentRevenue7d = new Map<string, { total: number; events: number }>();
@@ -383,7 +391,7 @@ export async function GET(req: Request) {
       row => row.cohortSize,
     );
     const trendingAgents = visibleTrendingAgents.rows
-      .slice(0, 5)
+      .slice(0, Math.min(detailedLimit, 5))
       .map(agent => ({
         agentId: agent.agentId,
         agentName: agent.agentName,
diff --git a/web/src/app/api/proposals/route.ts b/web/src/app/api/proposals/route.ts
index 8719413b..442ffd96 100644
--- a/web/src/app/api/proposals/route.ts
+++ b/web/src/app/api/proposals/route.ts
@@ -3,11 +3,16 @@ import { db } from "@/db";
 import { tlsApprovals, tlsTalos } from "@/db/schema";
 import { eq, desc } from "drizzle-orm";
 import { internalError } from "@/lib/api-response";
+import { parseAnalyticsLimit } from "@/lib/analytics-limits";
 
 // GET /api/proposals — All proposals across all Talos, newest first
-// Optional ?status=pending|approved|rejected filter
+// Optional ?status=pending|approved|rejected filter, optional ?limit=1..100 (default 50)
 export async function GET(request: NextRequest) {
-  const status = new URL(request.url).searchParams.get("status");
+  const searchParams = new URL(request.url).searchParams;
+  const status = searchParams.get("status");
+  const parsedLimit = parseAnalyticsLimit(searchParams.get("limit"), 50, 100);
+  if (!parsedLimit.ok) return parsedLimit.response;
+  const limit = parsedLimit.limit;
 
   try {
     const rows = await db
@@ -28,7 +33,8 @@ export async function GET(request: NextRequest) {
       .from(tlsApprovals)
       .innerJoin(tlsTalos, eq(tlsApprovals.talosId, tlsTalos.id))
       .where(status ? eq(tlsApprovals.status, status) : undefined)
-      .orderBy(desc(tlsApprovals.createdAt));
+      .orderBy(desc(tlsApprovals.createdAt))
+      .limit(limit);
 
     return Response.json(rows);
   } catch {
diff --git a/web/src/app/api/talos/[id]/dividends/route.ts b/web/src/app/api/talos/[id]/dividends/route.ts
index 255afa05..bce94137 100644
--- a/web/src/app/api/talos/[id]/dividends/route.ts
+++ b/web/src/app/api/talos/[id]/dividends/route.ts
@@ -5,6 +5,7 @@ import { desc, eq } from "drizzle-orm";
 import { verifyAgentApiKey } from "@/lib/auth";
 import { recordDividendSchema, parseBody } from "@/lib/schemas";
 import { emitWebhookEvent } from "@/lib/webhooks/delivery";
+import { parseAnalyticsLimit } from "@/lib/analytics-limits";
 
 /**
  * GET /api/talos/:id/dividends
@@ -13,15 +14,20 @@ import { emitWebhookEvent } from "@/lib/webhooks/delivery";
  * revenue that has been shared out to Mitos/Pulse token holders over time.
  *
  * Public read (consistent with revenue history + RLS anon_read policy).
- * Returns the most recent 50 distributions, newest first.
+ * Returns distributions with bounded limit (default 50, max 100), newest first.
  */
 export async function GET(
-  _request: NextRequest,
+  request: NextRequest,
   { params }: { params: Promise<{ id: string }> },
 ) {
   const { id } = await params;
 
   try {
+    const { searchParams } = new URL(request.url);
+    const parsedLimit = parseAnalyticsLimit(searchParams.get("limit"), 50, 100);
+    if (!parsedLimit.ok) return parsedLimit.response;
+    const limit = parsedLimit.limit;
+
     const talos = await db
       .select({ id: tlsTalos.id })
       .from(tlsTalos)
@@ -38,7 +44,7 @@ export async function GET(
       .from(tlsDividends)
       .where(eq(tlsDividends.talosId, id))
       .orderBy(desc(tlsDividends.createdAt))
-      .limit(50);
+      .limit(limit);
 
     return Response.json(dividends);
   } catch {
diff --git a/web/src/app/api/talos/[id]/exposure/__tests__/route.test.ts b/web/src/app/api/talos/[id]/exposure/__tests__/route.test.ts
index eb5899b3..74311d52 100644
--- a/web/src/app/api/talos/[id]/exposure/__tests__/route.test.ts
+++ b/web/src/app/api/talos/[id]/exposure/__tests__/route.test.ts
@@ -79,4 +79,43 @@ describe("GET /api/talos/:id/exposure", () => {
     expect(body.exposures[0].settledAmount).toBe(100);
     expect(body.windowDays).toBe(7);
   });
+
+  it("returns 400 when limit exceeds maximum allowed limit", async () => {
+    mocks.verifyAgentApiKey.mockResolvedValue({ ok: true, talos: { id: "agent-1", apiKey: "valid" } });
+
+    const response = await GET(new NextRequest("http://localhost/api/talos/agent-1/exposure?limit=150"), {
+      params: Promise.resolve({ id: "agent-1" }),
+    });
+
+    expect(response.status).toBe(400);
+    const body = await response.json();
+    expect(body.error).toContain("exceeds maximum allowed limit of 100");
+  });
+
+  it.each(["0", "-1", "abc", "1.5", ""])("returns 400 for malformed limit=%s", async (val) => {
+    mocks.verifyAgentApiKey.mockResolvedValue({ ok: true, talos: { id: "agent-1", apiKey: "valid" } });
+
+    const response = await GET(new NextRequest(`http://localhost/api/talos/agent-1/exposure?limit=${val}`), {
+      params: Promise.resolve({ id: "agent-1" }),
+    });
+
+    expect(response.status).toBe(400);
+    const body = await response.json();
+    expect(body.error).toBe("limit must be a positive integer");
+  });
+
+  it("accepts maximum limit of 100", async () => {
+    mocks.verifyAgentApiKey.mockResolvedValue({ ok: true, talos: { id: "agent-1", apiKey: "valid" } });
+    mocks.select
+      .mockReturnValueOnce(chain([{ id: "agent-1" }]))
+      .mockReturnValueOnce(chain([]));
+
+    const response = await GET(new NextRequest("http://localhost/api/talos/agent-1/exposure?limit=100"), {
+      params: Promise.resolve({ id: "agent-1" }),
+    });
+
+    expect(response.status).toBe(200);
+    const body = await response.json();
+    expect(body.pagination.limit).toBe(100);
+  });
 });
diff --git a/web/src/app/api/talos/[id]/exposure/alerts/__tests__/route.test.ts b/web/src/app/api/talos/[id]/exposure/alerts/__tests__/route.test.ts
index 46880281..05a97b32 100644
--- a/web/src/app/api/talos/[id]/exposure/alerts/__tests__/route.test.ts
+++ b/web/src/app/api/talos/[id]/exposure/alerts/__tests__/route.test.ts
@@ -76,4 +76,60 @@ describe("GET /api/talos/:id/exposure/alerts", () => {
     expect(body.alerts.some((alert: { type: string }) => alert.type === "repeated-denial")).toBe(true);
     expect(body.alerts.some((alert: { type: string }) => alert.type === "reconciliation-drift")).toBe(true);
   });
+
+  it("returns 400 when limit exceeds maximum allowed limit of 100", async () => {
+    mocks.verifyAgentApiKey.mockResolvedValue({ ok: true, talos: { id: "agent-1", apiKey: "valid" } });
+
+    const response = await GET(new NextRequest("http://localhost/api/talos/agent-1/exposure/alerts?limit=150"), {
+      params: Promise.resolve({ id: "agent-1" }),
+    });
+
+    expect(response.status).toBe(400);
+    const body = await response.json();
+    expect(body.error).toContain("exceeds maximum allowed limit of 100");
+  });
+
+  it.each(["0", "-1", "abc", "1.5", ""])("returns 400 for malformed limit=%s", async (val) => {
+    mocks.verifyAgentApiKey.mockResolvedValue({ ok: true, talos: { id: "agent-1", apiKey: "valid" } });
+
+    const response = await GET(new NextRequest(`http://localhost/api/talos/agent-1/exposure/alerts?limit=${val}`), {
+      params: Promise.resolve({ id: "agent-1" }),
+    });
+
+    expect(response.status).toBe(400);
+    const body = await response.json();
+    expect(body.error).toBe("limit must be a positive integer");
+  });
+
+  it("bounds returned alerts array to requested limit", async () => {
+    mocks.verifyAgentApiKey.mockResolvedValue({ ok: true, talos: { id: "agent-1", apiKey: "valid" } });
+    mocks.select
+      .mockReturnValueOnce(chain([{ id: "agent-1" }]))
+      .mockReturnValueOnce(chain([
+        {
+          counterpartyId: "counterparty-1",
+          asset: "USDC",
+          reservedAmount: "1200",
+          settledAmount: "100",
+          deniedCount: 3,
+          lastObservedAt: new Date("2026-07-25T00:00:00.000Z"),
+        },
+        {
+          counterpartyId: "counterparty-2",
+          asset: "USDC",
+          reservedAmount: "2000",
+          settledAmount: "100",
+          deniedCount: 5,
+          lastObservedAt: new Date("2026-07-25T00:00:00.000Z"),
+        },
+      ]));
+
+    const response = await GET(new NextRequest("http://localhost/api/talos/agent-1/exposure/alerts?limit=2"), {
+      params: Promise.resolve({ id: "agent-1" }),
+    });
+
+    expect(response.status).toBe(200);
+    const body = await response.json();
+    expect(body.alerts.length).toBeLessThanOrEqual(2);
+  });
 });
diff --git a/web/src/app/api/talos/[id]/exposure/alerts/route.ts b/web/src/app/api/talos/[id]/exposure/alerts/route.ts
index 6633f3fa..00d05738 100644
--- a/web/src/app/api/talos/[id]/exposure/alerts/route.ts
+++ b/web/src/app/api/talos/[id]/exposure/alerts/route.ts
@@ -3,6 +3,7 @@ import { and, desc, eq, gte, sql } from "drizzle-orm";
 import { db } from "@/db";
 import { tlsCommerceJobs, tlsCommerceServices, tlsTalos } from "@/db/schema";
 import { verifyAgentApiKey } from "@/lib/auth";
+import { parseAnalyticsLimit } from "@/lib/analytics-limits";
 
 function toNumber(value: unknown): number {
   const parsed = typeof value === "string" ? Number(value) : Number(value ?? 0);
@@ -25,6 +26,11 @@ export async function GET(
     const auth = await verifyAgentApiKey(request, id, ["revenue:read"]);
     if (!auth.ok) return auth.response;
 
+    const { searchParams } = new URL(request.url);
+    const parsedLimit = parseAnalyticsLimit(searchParams.get("limit"), 25, 100);
+    if (!parsedLimit.ok) return parsedLimit.response;
+    const limit = parsedLimit.limit;
+
     const talos = await db
       .select({ id: tlsTalos.id })
       .from(tlsTalos)
@@ -36,7 +42,6 @@ export async function GET(
       return Response.json({ error: "TALOS not found" }, { status: 404 });
     }
 
-    const { searchParams } = new URL(request.url);
     const windowDays = Math.max(1, Number(searchParams.get("window") ?? 30));
     const since = new Date(Date.now() - windowDays * 24 * 60 * 60 * 1000);
 
@@ -59,7 +64,8 @@ export async function GET(
       )
       .where(and(eq(tlsCommerceJobs.talosId, id), gte(tlsCommerceJobs.createdAt, since)))
       .groupBy(tlsCommerceJobs.requesterTalosId, tlsCommerceServices.currency)
-      .orderBy(desc(sql`max(${tlsCommerceJobs.createdAt})`));
+      .orderBy(desc(sql`max(${tlsCommerceJobs.createdAt})`))
+      .limit(1000);
 
     const alerts = [] as Array<{
       type: string;
@@ -118,7 +124,7 @@ export async function GET(
     return Response.json({
       agentId: id,
       windowDays,
-      alerts,
+      alerts: alerts.slice(0, limit),
     });
   } catch {
     return Response.json({ error: "Internal server error" }, { status: 500 });
diff --git a/web/src/app/api/talos/[id]/exposure/route.ts b/web/src/app/api/talos/[id]/exposure/route.ts
index 34aec70b..97780ae9 100644
--- a/web/src/app/api/talos/[id]/exposure/route.ts
+++ b/web/src/app/api/talos/[id]/exposure/route.ts
@@ -3,6 +3,7 @@ import { and, desc, eq, gte, sql } from "drizzle-orm";
 import { db } from "@/db";
 import { tlsCommerceJobs, tlsCommerceServices, tlsTalos } from "@/db/schema";
 import { verifyAgentApiKey } from "@/lib/auth";
+import { parseAnalyticsLimit } from "@/lib/analytics-limits";
 
 function parseWindow(windowParam: string | null): { windowMs: number; windowDays: number } {
   const raw = windowParam ?? "30d";
@@ -13,13 +14,6 @@ function parseWindow(windowParam: string | null): { windowMs: number; windowDays
   return { windowMs: windowDays * 24 * 60 * 60 * 1000, windowDays };
 }
 
-function parsePagination(request: Request): { limit: number; cursor: string | null } {
-  const { searchParams } = new URL(request.url);
-  const limit = Math.min(Math.max(parseInt(searchParams.get("limit") ?? "25", 10) || 25, 1), 100);
-  const cursor = searchParams.get("cursor");
-  return { limit, cursor };
-}
-
 function toNumber(value: unknown): number {
   const parsed = typeof value === "string" ? Number(value) : Number(value ?? 0);
   return Number.isFinite(parsed) ? parsed : 0;
@@ -41,6 +35,12 @@ export async function GET(
     const auth = await verifyAgentApiKey(request, id, ["revenue:read"]);
     if (!auth.ok) return auth.response;
 
+    const { searchParams } = new URL(request.url);
+    const parsedLimit = parseAnalyticsLimit(searchParams.get("limit"), 25, 100);
+    if (!parsedLimit.ok) return parsedLimit.response;
+    const limit = parsedLimit.limit;
+    const cursor = searchParams.get("cursor");
+
     const talos = await db
       .select({ id: tlsTalos.id })
       .from(tlsTalos)
@@ -52,9 +52,7 @@ export async function GET(
       return Response.json({ error: "TALOS not found" }, { status: 404 });
     }
 
-    const { searchParams } = new URL(request.url);
     const { windowMs, windowDays } = parseWindow(searchParams.get("window"));
-    const { limit, cursor } = parsePagination(request);
     const since = new Date(Date.now() - windowMs);
 
     const rows = await db
@@ -78,7 +76,8 @@ export async function GET(
       )
       .where(and(eq(tlsCommerceJobs.talosId, id), gte(tlsCommerceJobs.createdAt, since)))
       .groupBy(tlsCommerceJobs.requesterTalosId, tlsCommerceJobs.serviceName, tlsCommerceServices.currency)
-      .orderBy(desc(sql`max(${tlsCommerceJobs.createdAt})`));
+      .orderBy(desc(sql`max(${tlsCommerceJobs.createdAt})`))
+      .limit(1000);
 
     const filtered = rows
       .map((row) => ({
diff --git a/web/src/app/api/talos/[id]/financial-projection/route.ts b/web/src/app/api/talos/[id]/financial-projection/route.ts
index 7556b29e..2d1b0d82 100644
--- a/web/src/app/api/talos/[id]/financial-projection/route.ts
+++ b/web/src/app/api/talos/[id]/financial-projection/route.ts
@@ -65,7 +65,8 @@ export async function GET(
     const patrons = await db
       .select()
       .from(tlsPatrons)
-      .where(eq(tlsPatrons.talosId, id));
+      .where(eq(tlsPatrons.talosId, id))
+      .limit(100);
 
     // Calculate revenue summary
     const totalRevenue = revenues.reduce(
@@ -232,7 +233,7 @@ Generate projections for the next 12 months.`;
   } catch (error) {
     console.error("Financial projection error:", error);
     return Response.json(
-      { error: "Internal server error", details: error instanceof Error ? error.message : "Unknown error" },
+      { error: "Internal server error" },
       { status: 500 }
     );
   }
diff --git a/web/src/app/api/talos/[id]/financial-summary/__tests__/route.test.ts b/web/src/app/api/talos/[id]/financial-summary/__tests__/route.test.ts
index 721b83dd..eb14fef1 100644
--- a/web/src/app/api/talos/[id]/financial-summary/__tests__/route.test.ts
+++ b/web/src/app/api/talos/[id]/financial-summary/__tests__/route.test.ts
@@ -536,6 +536,44 @@ describe("GET /api/talos/:id/financial-summary", () => {
       const parsed = JSON.parse(jsonString);
       expect(parsed.cashFlow.totalRevenue).toBe(1000000000000000.123456);
     });
+
+    it("returns 400 when limit exceeds maximum allowed limit of 100", async () => {
+      mocks.mockVerifyAgentApiKey.mockResolvedValue({
+        ok: true,
+        talos: { id: "agent-1", apiKey: "valid-key" },
+      });
+
+      const request = new NextRequest(
+        "http://localhost/api/talos/agent-1/financial-summary?limit=150",
+        { headers: { Authorization: "Bearer valid-key" } },
+      );
+      const response = await GET(request, {
+        params: Promise.resolve({ id: "agent-1" }),
+      });
+
+      expect(response.status).toBe(400);
+      const body = await response.json();
+      expect(body.error).toContain("exceeds maximum allowed limit of 100");
+    });
+
+    it.each(["0", "-1", "abc", "1.5", ""])("returns 400 for malformed limit=%s", async (val) => {
+      mocks.mockVerifyAgentApiKey.mockResolvedValue({
+        ok: true,
+        talos: { id: "agent-1", apiKey: "valid-key" },
+      });
+
+      const request = new NextRequest(
+        `http://localhost/api/talos/agent-1/financial-summary?limit=${val}`,
+        { headers: { Authorization: "Bearer valid-key" } },
+      );
+      const response = await GET(request, {
+        params: Promise.resolve({ id: "agent-1" }),
+      });
+
+      expect(response.status).toBe(400);
+      const body = await response.json();
+      expect(body.error).toBe("limit must be a positive integer");
+    });
   });
 
   describe("toMonetaryValue helper unit tests", () => {
diff --git a/web/src/app/api/talos/[id]/financial-summary/route.ts b/web/src/app/api/talos/[id]/financial-summary/route.ts
index 12e0f9f3..dbf4383f 100644
--- a/web/src/app/api/talos/[id]/financial-summary/route.ts
+++ b/web/src/app/api/talos/[id]/financial-summary/route.ts
@@ -9,6 +9,7 @@ import {
 } from "@/db/schema";
 import { and, eq, gte, sql, desc } from "drizzle-orm";
 import { verifyAgentApiKey } from "@/lib/auth";
+import { parseAnalyticsLimit } from "@/lib/analytics-limits";
 
 /**
  * Monetary Value Representation Standard:
@@ -57,6 +58,11 @@ export async function GET(
     const auth = await verifyAgentApiKey(request, id, ["revenue:read"]);
     if (!auth.ok) return auth.response;
 
+    const { searchParams } = new URL(request.url);
+    const parsedLimit = parseAnalyticsLimit(searchParams.get("limit"), 20, 100);
+    if (!parsedLimit.ok) return parsedLimit.response;
+    const limit = parsedLimit.limit;
+
     // ── Verify the TALOS agent exists ─────────────────────────────
     const talos = await db
       .select({
@@ -213,7 +219,7 @@ export async function GET(
         ),
       )
       .orderBy(desc(tlsApprovals.createdAt))
-      .limit(20);
+      .limit(limit);
 
     // ── Playbook sales metrics ───────────────────────────────────
     const playbookRows = await db
@@ -240,7 +246,8 @@ export async function GET(
         tlsPlaybooks.currency,
         tlsPlaybooks.category,
         tlsPlaybooks.status,
-      );
+      )
+      .limit(limit);
 
     // ── Compute derived monetary analytics ───────────────────────
     const totalRevenueNum = toMonetaryValue(revenueAllTime?.totalRevenue);
diff --git a/web/src/app/api/talos/[id]/patrons/route.ts b/web/src/app/api/talos/[id]/patrons/route.ts
index d6b0ef87..d59776e7 100644
--- a/web/src/app/api/talos/[id]/patrons/route.ts
+++ b/web/src/app/api/talos/[id]/patrons/route.ts
@@ -4,14 +4,19 @@ import { tlsTalos, tlsPatrons } from "@/db/schema";
 import { and, desc, eq } from "drizzle-orm";
 import { getAccountInfo, verifyStellarSignature } from "@/lib/stellar";
 import { becomePatronSchema, revokePatronSchema, parseBody } from "@/lib/schemas";
+import { parseAnalyticsLimit } from "@/lib/analytics-limits";
 
 // GET /api/talos/:id/patrons — List patrons for a TALOS
 export async function GET(
-  _request: NextRequest,
+  request: NextRequest,
   { params }: { params: Promise<{ id: string }> }
 ) {
   try {
     const { id } = await params;
+    const { searchParams } = new URL(request.url);
+    const parsedLimit = parseAnalyticsLimit(searchParams.get("limit"), 50, 100);
+    if (!parsedLimit.ok) return parsedLimit.response;
+    const limit = parsedLimit.limit;
 
     const talos = await db
       .select({ id: tlsTalos.id })
@@ -28,7 +33,8 @@ export async function GET(
       .select()
       .from(tlsPatrons)
       .where(and(eq(tlsPatrons.talosId, id), eq(tlsPatrons.status, "active")))
-      .orderBy(desc(tlsPatrons.createdAt));
+      .orderBy(desc(tlsPatrons.createdAt))
+      .limit(limit);
 
     return Response.json(patrons);
   } catch {
diff --git a/web/src/app/api/talos/[id]/revenue/route.ts b/web/src/app/api/talos/[id]/revenue/route.ts
index 557a78b3..f62a53da 100644
--- a/web/src/app/api/talos/[id]/revenue/route.ts
+++ b/web/src/app/api/talos/[id]/revenue/route.ts
@@ -4,6 +4,8 @@ import { tlsTalos, tlsRevenues } from "@/db/schema";
 import { and, desc, eq, sql } from "drizzle-orm";
 import { verifyAgentApiKey } from "@/lib/auth";
 import { emitWebhookEvent } from "@/lib/webhooks/delivery";
+import { parseAnalyticsLimit } from "@/lib/analytics-limits";
+import { withTraceContext } from "@/lib/tracing";
 
 // GET /api/talos/:id/revenue — Get revenue history
 export async function GET(
@@ -13,7 +15,9 @@ export async function GET(
   const { id } = await params;
   const { searchParams } = new URL(request.url);
   const cursor = searchParams.get("cursor");
-  const limit = Math.min(Math.max(parseInt(searchParams.get("limit") ?? "50", 10) || 50, 1), 200);
+  const parsedLimit = parseAnalyticsLimit(searchParams.get("limit"), 50, 100);
+  if (!parsedLimit.ok) return parsedLimit.response;
+  const limit = parsedLimit.limit;
 
   try {
     const auth = await verifyAgentApiKey(request, id, ["revenue:read"]);
diff --git a/web/src/lib/analytics-limits.ts b/web/src/lib/analytics-limits.ts
new file mode 100644
index 00000000..66116ef2
--- /dev/null
+++ b/web/src/lib/analytics-limits.ts
@@ -0,0 +1,68 @@
+/**
+ * Shared validation and parsing helper for public analytics endpoint response limits.
+ *
+ * Rules:
+ * - Absent param (null | undefined) → returns defaultLimit
+ * - Non-empty string with non-digits (e.g. "abc", "1.5", "-1", "0", "") → 400 Bad Request
+ * - Values exceeding maxLimit → 400 Bad Request (explicit error response)
+ * - Valid positive integer within [1, maxLimit] → returns parsed limit
+ */
+
+export interface AnalyticsLimitResult {
+  ok: true;
+  limit: number;
+}
+
+export interface AnalyticsLimitError {
+  ok: false;
+  response: Response;
+}
+
+export function parseAnalyticsLimit(
+  raw: string | null | undefined,
+  defaultLimit: number,
+  maxLimit: number,
+  paramName = "limit",
+): AnalyticsLimitResult | AnalyticsLimitError {
+  // Absent param → use default
+  if (raw === null || raw === undefined) {
+    return { ok: true, limit: defaultLimit };
+  }
+
+  // Must be a non-empty string of digits only (no signs, decimal points, spaces)
+  if (!/^\d+$/.test(raw)) {
+    return {
+      ok: false,
+      response: Response.json(
+        { error: `${paramName} must be a positive integer` },
+        { status: 400 },
+      ),
+    };
+  }
+
+  const n = parseInt(raw, 10);
+
+  // 0 is not a valid limit
+  if (n === 0) {
+    return {
+      ok: false,
+      response: Response.json(
+        { error: `${paramName} must be a positive integer` },
+        { status: 400 },
+      ),
+    };
+  }
+
+  // Exceeds route-configured max limit → return 400
+  if (n > maxLimit) {
+    return {
+      ok: false,
+      response: Response.json(
+        { error: `${paramName} exceeds maximum allowed limit of ${maxLimit}` },
+        { status: 400 },
+      ),
+    };
+  }
+
+  return { ok: true, limit: n };
+}
diff --git a/web/tests/analytics-limits.unit.test.ts b/web/tests/analytics-limits.unit.test.ts
new file mode 100644
index 00000000..6ebf63f1
--- /dev/null
+++ b/web/tests/analytics-limits.unit.test.ts
@@ -0,0 +1,109 @@
+import { describe, it, expect } from "vitest";
+import { parseAnalyticsLimit } from "@/lib/analytics-limits";
+
+describe("parseAnalyticsLimit", () => {
+  describe("absent param → defaultLimit", () => {
+    it("returns defaultLimit when raw is null", () => {
+      const result = parseAnalyticsLimit(null, 25, 100);
+      expect(result).toEqual({ ok: true, limit: 25 });
+    });
+
+    it("returns defaultLimit when raw is undefined", () => {
+      const result = parseAnalyticsLimit(undefined, 10, 50);
+      expect(result).toEqual({ ok: true, limit: 10 });
+    });
+  });
+
+  describe("valid positive integers up to maxLimit", () => {
+    const validCases: Array<[string, number, number, number]> = [
+      ["1", 25, 100, 1],
+      ["25", 25, 100, 25],
+      ["100", 25, 100, 100],
+      ["50", 10, 50, 50],
+      ["10", 10, 50, 10],
+      ["5000", 5000, 10000, 5000],
+      ["10000", 5000, 10000, 10000],
+    ];
+
+    it.each(validCases)(
+      'parseAnalyticsLimit("%s", %i, %i) → %i',
+      (raw, def, max, expected) => {
+        const result = parseAnalyticsLimit(raw, def, max);
+        expect(result).toEqual({ ok: true, limit: expected });
+      },
+    );
+  });
+
+  describe("exceeds maxLimit → returns 400 validation error", () => {
+    const overLimitCases: Array<[string, number, number]> = [
+      ["101", 25, 100],
+      ["500", 25, 100],
+      ["9999", 50, 100],
+      ["51", 10, 50],
+      ["10001", 5000, 10000],
+    ];
+
+    it.each(overLimitCases)(
+      'parseAnalyticsLimit("%s", %i, %i) → 400 over limit',
+      async (raw, def, max) => {
+        const result = parseAnalyticsLimit(raw, def, max);
+        expect(result.ok).toBe(false);
+        if (!result.ok) {
+          expect(result.response.status).toBe(400);
+          const body = await result.response.json();
+          expect(body.error).toContain(`exceeds maximum allowed limit of ${max}`);
+        }
+      },
+    );
+  });
+
+  describe("zero, negative, and malformed inputs → returns 400", () => {
+    const invalidCases = [
+      "0",
+      "-1",
+      "-50",
+      "abc",
+      "1.5",
+      "1.0",
+      "",
+      " ",
+      "1e2",
+      "NaN",
+      "Infinity",
+      "0x10",
+      " 10",
+      "10 ",
+    ];
+
+    it.each(invalidCases)('rejects "%s" with 400', async (raw) => {
+      const result = parseAnalyticsLimit(raw, 25, 100);
+      expect(result.ok).toBe(false);
+      if (!result.ok) {
+        expect(result.response.status).toBe(400);
+        const body = await result.response.json();
+        expect(body).toHaveProperty("error");
+        expect(body.error).toBe("limit must be a positive integer");
+      }
+    });
+  });
+
+  describe("custom parameter names in error response", () => {
+    it("uses custom paramName in error messages", async () => {
+      const malformed = parseAnalyticsLimit("abc", 25, 100, "jobLimit");
+      expect(malformed.ok).toBe(false);
+      if (!malformed.ok) {
+        expect(malformed.response.status).toBe(400);
+        const body = await malformed.response.json();
+        expect(body.error).toBe("jobLimit must be a positive integer");
+      }
+
+      const overLimit = parseAnalyticsLimit("200", 25, 100, "jobLimit");
+      expect(overLimit.ok).toBe(false);
+      if (!overLimit.ok) {
+        expect(overLimit.response.status).toBe(400);
+        const body = await overLimit.response.json();
+        expect(body.error).toBe("jobLimit exceeds maximum allowed limit of 100");
+      }
+    });
+  });
+});
diff --git a/web/tests/analytics-route-limits.unit.test.ts b/web/tests/analytics-route-limits.unit.test.ts
new file mode 100644
index 00000000..dc1ae2af
--- /dev/null
+++ b/web/tests/analytics-route-limits.unit.test.ts
@@ -0,0 +1,251 @@
+/**
+ * Unit tests verifying response-size limits on public analytics and collection endpoints.
+ *
+ * Checks:
+ *  1. Default limit when limit query parameter is absent.
+ *  2. Custom valid limit accepted within supported maximum.
+ *  3. HTTP 400 validation error when requested limit exceeds maximum allowed limit.
+ *  4. HTTP 400 validation error on malformed, zero, or negative limit parameters.
+ *  5. Error responses do not expose internal database details.
+ */
+
+import { describe, it, expect, vi, beforeEach } from "vitest";
+import { NextRequest } from "next/server";
+
+// ── Shared DB mock ─────────────────────────────────────────────────────────────
+function buildSelectChain(rows: unknown[] = []) {
+  const obj: Record<string, unknown> = {};
+  const passthrough = ["from", "where", "orderBy", "leftJoin", "innerJoin", "groupBy", "as"];
+  for (const m of passthrough) {
+    obj[m] = vi.fn(() => obj);
+  }
+  obj.limit = vi.fn(() => obj);
+  obj.then = vi.fn((onFulfilled: (v: unknown) => unknown) =>
+    Promise.resolve(onFulfilled(rows)),
+  );
+  return obj;
+}
+
+const mocks = vi.hoisted(() => ({
+  mockDb: {
+    select: vi.fn(),
+    insert: vi.fn(),
+    update: vi.fn(),
+    transaction: vi.fn(),
+    query: {
+      tlsTalos: { findFirst: vi.fn(), findMany: vi.fn() },
+      tlsPatrons: { findMany: vi.fn() },
+      tlsRevenues: { findMany: vi.fn() },
+      tlsCommerceServices: { findMany: vi.fn() },
+      tlsCommerceJobs: { findMany: vi.fn() },
+      tlsPlaybooks: { findMany: vi.fn() },
+      tlsPlaybookPurchases: { findMany: vi.fn() },
+      tlsActivities: { findMany: vi.fn() },
+    },
+  },
+  verifyAgentApiKey: vi.fn().mockResolvedValue({ ok: true, talos: { id: "test-agent", apiKey: "valid-key" } }),
+}));
+
+vi.mock("@/db", () => ({ db: mocks.mockDb }));
+vi.mock("@/lib/auth", () => ({
+  verifyAgentApiKey: mocks.verifyAgentApiKey,
+}));
+// The analytics routes also import the webhook delivery engine (unrelated to
+// response-size limits). Mock it so these tests stay isolated from that module.
+vi.mock("@/lib/webhooks/delivery", () => ({
+  emitWebhookEvent: vi.fn().mockResolvedValue(undefined),
+}));
+
+function req(url: string, params: Record<string, string> = {}): NextRequest {
+  const u = new URL(`http://localhost${url}`);
+  for (const [k, v] of Object.entries(params)) {
+    u.searchParams.set(k, v);
+  }
+  return new NextRequest(u.toString(), {
+    headers: { Authorization: "Bearer valid-key" },
+  });
+}
+
+// ─────────────────────────────────────────────────────────────────────────────
+// 1. GET /api/talos/:id/patrons
+// ─────────────────────────────────────────────────────────────────────────────
+import { GET as patronsGET } from "@/app/api/talos/[id]/patrons/route";
+
+describe("GET /api/talos/:id/patrons — response-size limits", () => {
+  beforeEach(() => {
+    vi.clearAllMocks();
+    mocks.mockDb.select.mockReturnValue(buildSelectChain([{ id: "test-agent" }]));
+  });
+
+  it("returns 200 and uses defaultLimit=50 when limit is absent", async () => {
+    const res = await patronsGET(req("/api/talos/test-agent/patrons"), {
+      params: Promise.resolve({ id: "test-agent" }),
+    });
+    expect(res.status).toBe(200);
+  });
+
+  it("returns 200 with valid custom limit=25", async () => {
+    const res = await patronsGET(req("/api/talos/test-agent/patrons", { limit: "25" }), {
+      params: Promise.resolve({ id: "test-agent" }),
+    });
+    expect(res.status).toBe(200);
+  });
+
+  it("returns 400 when limit exceeds maxLimit=100", async () => {
+    const res = await patronsGET(req("/api/talos/test-agent/patrons", { limit: "101" }), {
+      params: Promise.resolve({ id: "test-agent" }),
+    });
+    expect(res.status).toBe(400);
+    const body = await res.json();
+    expect(body.error).toContain("exceeds maximum allowed limit of 100");
+  });
+
+  it.each(["0", "-5", "abc", "1.5", ""])("returns 400 for malformed limit=%s", async (val) => {
+    const res = await patronsGET(req("/api/talos/test-agent/patrons", { limit: val }), {
+      params: Promise.resolve({ id: "test-agent" }),
+    });
+    expect(res.status).toBe(400);
+    const body = await res.json();
+    expect(body.error).toBe("limit must be a positive integer");
+  });
+});
+
+// ─────────────────────────────────────────────────────────────────────────────
+// 2. GET /api/talos/:id/dividends
+// ─────────────────────────────────────────────────────────────────────────────
+import { GET as dividendsGET } from "@/app/api/talos/[id]/dividends/route";
+
+describe("GET /api/talos/:id/dividends — response-size limits", () => {
+  beforeEach(() => {
+    vi.clearAllMocks();
+    mocks.mockDb.select.mockReturnValue(buildSelectChain([{ id: "test-agent" }]));
+  });
+
+  it("returns 200 with default limit=50", async () => {
+    const res = await dividendsGET(req("/api/talos/test-agent/dividends"), {
+      params: Promise.resolve({ id: "test-agent" }),
+    });
+    expect(res.status).toBe(200);
+  });
+
+  it("returns 200 with valid limit=100 (maximum)", async () => {
+    const res = await dividendsGET(req("/api/talos/test-agent/dividends", { limit: "100" }), {
+      params: Promise.resolve({ id: "test-agent" }),
+    });
+    expect(res.status).toBe(200);
+  });
+
+  it("returns 400 when limit exceeds maxLimit=100", async () => {
+    const res = await dividendsGET(req("/api/talos/test-agent/dividends", { limit: "150" }), {
+      params: Promise.resolve({ id: "test-agent" }),
+    });
+    expect(res.status).toBe(400);
+    const body = await res.json();
+    expect(body.error).toContain("exceeds maximum allowed limit of 100");
+  });
+
+  it.each(["0", "-1", "xyz", "2.2", ""])("returns 400 for malformed limit=%s", async (val) => {
+    const res = await dividendsGET(req("/api/talos/test-agent/dividends", { limit: val }), {
+      params: Promise.resolve({ id: "test-agent" }),
+    });
+    expect(res.status).toBe(400);
+    const body = await res.json();
+    expect(body.error).toBe("limit must be a positive integer");
+  });
+});
+
+// ─────────────────────────────────────────────────────────────────────────────
+// 3. GET /api/talos/:id/revenue
+// ─────────────────────────────────────────────────────────────────────────────
+import { GET as revenueGET } from "@/app/api/talos/[id]/revenue/route";
+
+describe("GET /api/talos/:id/revenue — response-size limits", () => {
+  beforeEach(() => {
+    vi.clearAllMocks();
+    mocks.mockDb.select.mockReturnValue(buildSelectChain([{ id: "test-agent" }]));
+  });
+
+  it("returns 200 with default limit=50", async () => {
+    const res = await revenueGET(req("/api/talos/test-agent/revenue"), {
+      params: Promise.resolve({ id: "test-agent" }),
+    });
+    expect(res.status).toBe(200);
+  });
+
+  it("returns 200 with valid limit=75", async () => {
+    const res = await revenueGET(req("/api/talos/test-agent/revenue", { limit: "75" }), {
+      params: Promise.resolve({ id: "test-agent" }),
+    });
+    expect(res.status).toBe(200);
+  });
+
+  it("returns 400 when limit exceeds maxLimit=100", async () => {
+    const res = await revenueGET(req("/api/talos/test-agent/revenue", { limit: "101" }), {
+      params: Promise.resolve({ id: "test-agent" }),
+    });
+    expect(res.status).toBe(400);
+    const body = await res.json();
+    expect(body.error).toContain("exceeds maximum allowed limit of 100");
+  });
+
+  it.each(["0", "-10", "bad", "3.14", ""])("returns 400 for malformed limit=%s", async (val) => {
+    const res = await revenueGET(req("/api/talos/test-agent/revenue", { limit: val }), {
+      params: Promise.resolve({ id: "test-agent" }),
+    });
+    expect(res.status).toBe(400);
+    const body = await res.json();
+    expect(body.error).toBe("limit must be a positive integer");
+  });
+});
+
+// ─────────────────────────────────────────────────────────────────────────────
+// 4. GET /api/proposals
+// ─────────────────────────────────────────────────────────────────────────────
+import { GET as proposalsGET } from "@/app/api/proposals/route";
+
+describe("GET /api/proposals — response-size limits", () => {
+  beforeEach(() => {
+    vi.clearAllMocks();
+    mocks.mockDb.select.mockReturnValue(buildSelectChain([]));
+  });
+
+  it("returns 200 with default limit=50", async () => {
+    const res = await proposalsGET(req("/api/proposals"));
+    expect(res.status).toBe(200);
+  });
+
+  it("returns 200 with valid limit=10", async () => {
+    const res = await proposalsGET(req("/api/proposals", { limit: "10" }));
+    expect(res.status).toBe(200);
+  });
+
+  it("returns 400 when limit exceeds maxLimit=100", async () => {
+    const res = await proposalsGET(req("/api/proposals", { limit: "120" }));
+    expect(res.status).toBe(400);
+    const body = await res.json();
+    expect(body.error).toContain("exceeds maximum allowed limit of 100");
+  });
+
+  it.each(["0", "-2", "invalid", "1.9", ""])("returns 400 for malformed limit=%s", async (val) => {
+    const res = await proposalsGET(req("/api/proposals", { limit: val }));
+    expect(res.status).toBe(400);
+    const body = await res.json();
+    expect(body.error).toBe("limit must be a positive integer");
+  });
+});
+
+// ─────────────────────────────────────────────────────────────────────────────
+// 5. Error responses do not expose internal DB details
+// ─────────────────────────────────────────────────────────────────────────────
+describe("Error response detail hiding", () => {
+  it("does not leak sql or postgres errors in GET /api/proposals on DB failure", async () => {
+    mocks.mockDb.select.mockImplementation(() => {
+      throw new Error("FATAL: connection to postgres failed at pg_hba.conf");
+    });
+
+    const res = await proposalsGET(req("/api/proposals"));
+    expect(res.status).toBe(500);
+    const body = await res.json();
+    expect(JSON.stringify(body)).not.toMatch(/postgres|pg_hba|sql|FATAL/i);
+  });
+});
diff --git a/web/tests/ecosystem-intelligence.test.ts b/web/tests/ecosystem-intelligence.test.ts
index 706197f2..07783a6d 100644
--- a/web/tests/ecosystem-intelligence.test.ts
+++ b/web/tests/ecosystem-intelligence.test.ts
@@ -758,4 +758,18 @@ describe("GET /api/ecosystem-intelligence", () => {
     expect(body.demand.byCategory).toEqual({ marketing: 1 });
     expect(body.metadata.privacy.deduplicatedRows).toBe(49);
   });
+
+  it("returns 400 when limit exceeds maximum allowed limit of 50", async () => {
+    const res = await GET(new Request("http://localhost/api/ecosystem-intelligence?limit=100"));
+    expect(res.status).toBe(400);
+    const body = await res.json();
+    expect(body.error).toContain("exceeds maximum allowed limit of 50");
+  });
+
+  it.each(["0", "-1", "abc", "1.5", ""])("returns 400 for malformed limit=%s", async (val) => {
+    const res = await GET(new Request(`http://localhost/api/ecosystem-intelligence?limit=${val}`));
+    expect(res.status).toBe(400);
+    const body = await res.json();
+    expect(body.error).toBe("limit must be a positive integer");
+  });
 });