diff --git a/services/platform-service/src/lib/api-key-auth.test.ts b/services/platform-service/src/lib/api-key-auth.test.ts
index 4b5e7dc0..d623a02a 100644
--- a/services/platform-service/src/lib/api-key-auth.test.ts
+++ b/services/platform-service/src/lib/api-key-auth.test.ts
@@ -4,29 +4,34 @@ import { beforeEach, describe, expect, it } from 'vitest';
 import { MemoryDatastoreProvider } from '@bytelyst/datastore';
 import { setProvider } from './datastore.js';
 import { registerOptionalApiKeyContext, requireJwtOrApiKey } from './api-key-auth.js';
+import { clearAll as clearRateLimits } from '../modules/ratelimit/store.js';
 
 const rawApiKey = `wai_${'a'.repeat(64)}`;
+const secondRawApiKey = `wai_${'b'.repeat(64)}`;
+let provider: MemoryDatastoreProvider;
 
 async function seedApiKeyToken(
   scopes: string[] = ['jobs:read'],
   overrides: Partial<{
+    id: string;
+    rawKey: string;
+    userId: string;
+    userName: string;
     tokenType: 'user_api' | 'product_api' | 'service_api';
     environment: 'dev' | 'staging' | 'prod';
     productId: string;
   }> = {}
 ) {
-  const provider = new MemoryDatastoreProvider();
-  setProvider(provider);
   const collection = provider.getCollection('api_tokens', '/id');
   await collection.create({
-    id: 'tok_api_1',
+    id: overrides.id ?? 'tok_api_1',
     productId: overrides.productId ?? 'lysnrai',
-    userId: 'svc_jobs',
-    userName: 'Jobs Service',
+    userId: overrides.userId ?? 'svc_jobs',
+    userName: overrides.userName ?? 'Jobs Service',
     tokenType: overrides.tokenType ?? 'service_api',
     environment: overrides.environment ?? 'dev',
-    prefix: rawApiKey.slice(0, 12),
-    tokenHash: await bcrypt.hash(rawApiKey, 10),
+    prefix: (overrides.rawKey ?? rawApiKey).slice(0, 12),
+    tokenHash: await bcrypt.hash(overrides.rawKey ?? rawApiKey, 10),
     status: 'active',
     scopes,
     expiresAt: '2099-01-01T00:00:00.000Z',
@@ -36,8 +41,12 @@ async function seedApiKeyToken(
 
 describe('api key auth', () => {
   beforeEach(() => {
+    provider = new MemoryDatastoreProvider();
+    setProvider(provider);
     delete process.env.API_KEY_RATE_LIMIT_CONFIG_JSON;
+    delete process.env.API_KEY_PRODUCT_RATE_LIMIT_CONFIG_JSON;
     delete process.env.PLATFORM_RUNTIME_ENV;
+    clearRateLimits();
   });
 
   it('attaches apiKeyAuth from x-api-key', async () => {
@@ -224,6 +233,58 @@ describe('api key auth', () => {
     expect(second.statusCode).toBe(429);
   });
 
+  it('rate limits across api keys for the same product and action key', async () => {
+    process.env.API_KEY_RATE_LIMIT_CONFIG_JSON = JSON.stringify({
+      'jobs:write': {
+        maxRequests: 5,
+        windowSeconds: 60,
+      },
+    });
+    process.env.API_KEY_PRODUCT_RATE_LIMIT_CONFIG_JSON = JSON.stringify({
+      'jobs:write': {
+        maxRequests: 1,
+        windowSeconds: 60,
+      },
+    });
+
+    await seedApiKeyToken(['jobs:write'], {
+      id: 'tok_api_1',
+      rawKey: rawApiKey,
+      userId: 'svc_jobs_primary',
+      userName: 'Jobs Primary',
+    });
+    await seedApiKeyToken(['jobs:write'], {
+      id: 'tok_api_2',
+      rawKey: secondRawApiKey,
+      userId: 'svc_jobs_secondary',
+      userName: 'Jobs Secondary',
+    });
+
+    const app = Fastify();
+    await registerOptionalApiKeyContext(app);
+
+    app.post('/probe', async req => {
+      return requireJwtOrApiKey(req, {
+        apiKeyScopes: ['jobs:write'],
+        rateLimitKey: 'jobs:write',
+      });
+    });
+
+    const first = await app.inject({
+      method: 'POST',
+      url: '/probe',
+      headers: { 'x-api-key': rawApiKey },
+    });
+    expect(first.statusCode).toBe(200);
+
+    const second = await app.inject({
+      method: 'POST',
+      url: '/probe',
+      headers: { 'x-api-key': secondRawApiKey },
+    });
+    expect(second.statusCode).toBe(429);
+  });
+
   it('allows JWT callers when configured', async () => {
     const app = Fastify();
     await registerOptionalApiKeyContext(app);
diff --git a/services/platform-service/src/lib/api-key-auth.ts b/services/platform-service/src/lib/api-key-auth.ts
index 88268eec..a5a3890c 100644
--- a/services/platform-service/src/lib/api-key-auth.ts
+++ b/services/platform-service/src/lib/api-key-auth.ts
@@ -104,6 +104,29 @@ function loadApiKeyRateLimitConfig(): ApiKeyRateLimitConfig {
   }
 }
 
+function loadApiKeyProductRateLimitConfig(
+  baseConfig: ApiKeyRateLimitConfig
+): ApiKeyRateLimitConfig {
+  const raw = process.env.API_KEY_PRODUCT_RATE_LIMIT_CONFIG_JSON;
+  if (raw) {
+    try {
+      return JSON.parse(raw) as ApiKeyRateLimitConfig;
+    } catch {
+      /* fall back to derived defaults */
+    }
+  }
+
+  return Object.fromEntries(
+    Object.entries(baseConfig).map(([key, rule]) => [
+      key,
+      {
+        maxRequests: Math.max(rule.maxRequests * 5, rule.maxRequests),
+        windowSeconds: rule.windowSeconds,
+      },
+    ])
+  );
+}
+
 function tokenHasScope(grantedScopes: string[], requiredScope: string): boolean {
   if (grantedScopes.includes('*')) return true;
 
@@ -170,14 +193,25 @@ function enforceApiKeyRateLimit(req: FastifyRequest, rateLimitKey?: string): voi
   if (!rateLimitKey || !req.apiKeyAuth) return;
 
   const apiKeyRateLimitConfig = loadApiKeyRateLimitConfig();
-  const rule = apiKeyRateLimitConfig[rateLimitKey];
-  if (!rule) return;
+  const keyRule = apiKeyRateLimitConfig[rateLimitKey];
+  if (!keyRule) return;
 
   const compositeKey = `api-key:${req.apiKeyAuth.productId}:${req.apiKeyAuth.tokenId}:${rateLimitKey}`;
-  const result = rateLimitStore.checkAndRecord(compositeKey, rule);
-  if (!result.allowed) {
+  const keyResult = rateLimitStore.checkAndRecord(compositeKey, keyRule);
+  if (!keyResult.allowed) {
     throw new TooManyRequestsError('API key rate limit exceeded', {
-      retryAfter: Math.ceil((result.retryAfterMs ?? 0) / 1000),
+      retryAfter: Math.ceil((keyResult.retryAfterMs ?? 0) / 1000),
+    });
+  }
+
+  const productRule = loadApiKeyProductRateLimitConfig(apiKeyRateLimitConfig)[rateLimitKey];
+  if (!productRule) return;
+
+  const productCompositeKey = `api-key-product:${req.apiKeyAuth.productId}:${rateLimitKey}`;
+  const productResult = rateLimitStore.checkAndRecord(productCompositeKey, productRule);
+  if (!productResult.allowed) {
+    throw new TooManyRequestsError('Product API key rate limit exceeded', {
+      retryAfter: Math.ceil((productResult.retryAfterMs ?? 0) / 1000),
     });
   }
 }