diff --git a/packages/catalog-server/src/lib/catalog.ts b/packages/catalog-server/src/lib/catalog.ts
index 386bf7ee..3332299d 100644
--- a/packages/catalog-server/src/lib/catalog.ts
+++ b/packages/catalog-server/src/lib/catalog.ts
@@ -39,6 +39,11 @@ const toTemporalInstant = (date: Date) => {
  */
 const defaultPackageRefreshInterval = Temporal.Duration.from({minutes: 5});
 
+/**
+ * The default amount of time between automated bulk updates of packages.
+ */
+const defaultPackageUpdateInterval = Temporal.Duration.from({hours: 6});
+
 export interface CatalogInit {
   repository: Repository;
   files: PackageFiles;
@@ -74,7 +79,7 @@ export class Catalog {
     packageVersion?: PackageVersion;
     problems?: ValidationProblem[];
   }> {
-    console.log('Catalog.importPackage');
+    console.log('Catalog.importPackage', packageName);
 
     const currentPackageInfo = await this.#repository.getPackageInfo(
       packageName
@@ -323,4 +328,17 @@ export class Catalog {
     // to the repository
     return this.#repository.queryElements({query, limit});
   }
+
+  async getPackagesToUpdate(notUpdatedSince?: Temporal.Instant) {
+    if (notUpdatedSince === undefined) {
+      const now = Temporal.Now.instant();
+      notUpdatedSince = now.subtract(defaultPackageUpdateInterval);
+    }
+
+    const packages = await this.#repository.getPackagesToUpdate(
+      notUpdatedSince,
+      100
+    );
+    return packages;
+  }
 }
diff --git a/packages/catalog-server/src/lib/firestore/firestore-repository.ts b/packages/catalog-server/src/lib/firestore/firestore-repository.ts
index 1bc2cd6c..1009929a 100644
--- a/packages/catalog-server/src/lib/firestore/firestore-repository.ts
+++ b/packages/catalog-server/src/lib/firestore/firestore-repository.ts
@@ -9,6 +9,7 @@ import {
   Query,
   CollectionReference,
   CollectionGroup,
+  Timestamp,
 } from '@google-cloud/firestore';
 import {Firestore} from '@google-cloud/firestore';
 import firebase from 'firebase-admin';
@@ -42,6 +43,7 @@ import {
 import {packageVersionConverter} from './package-version-converter.js';
 import {customElementConverter} from './custom-element-converter.js';
 import {validationProblemConverter} from './validation-problem-converter.js';
+import type {Temporal} from '@js-temporal/polyfill';
 
 const projectId = 'wc-catalog';
 firebase.initializeApp({projectId});
@@ -523,13 +525,38 @@ export class FirestoreRepository implements Repository {
     return result;
   }
 
-  getPackageRef(packageName: string) {
+  async getPackagesToUpdate(
+    notUpdatedSince: Temporal.Instant,
+    limit = 100
+  ): Promise<Array<PackageInfo>> {
+
+    const date = new Date(notUpdatedSince.epochMilliseconds);
+    const notUpdatedSinceTimestamp = Timestamp.fromDate(date);
+
+    // Only query 'READY', 'ERROR', and 'NOT_FOUND' packages.
+    // INITIALIZING and UPDATING packages are being updated, possibly by the
+    // batch update task calling this method. 
+    // ERROR and NOT_FOUND are "recoverable" errors, so we should try to import
+    // them again.
+    const result = await this.getPackageCollectionRef()
+      .where('status', 'in', ['READY', 'ERROR', 'NOT_FOUND'])
+      .where('lastUpdate', '<', notUpdatedSinceTimestamp)
+      .limit(limit)
+      .get();
+    const packages = result.docs.map((d) => d.data());
+    return packages;
+  }
+
+  getPackageCollectionRef() {
     return db
       .collection('packages' + (this.namespace ? `-${this.namespace}` : ''))
-      .doc(packageNameToId(packageName))
       .withConverter(packageInfoConverter);
   }
 
+  getPackageRef(packageName: string) {
+    return this.getPackageCollectionRef().doc(packageNameToId(packageName));
+  }
+
   getPackageVersionCollectionRef(packageName: string) {
     return this.getPackageRef(packageName)
       .collection('versions')
diff --git a/packages/catalog-server/src/lib/repository.ts b/packages/catalog-server/src/lib/repository.ts
index eb2e0178..659e0ce6 100644
--- a/packages/catalog-server/src/lib/repository.ts
+++ b/packages/catalog-server/src/lib/repository.ts
@@ -4,6 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
+import type {Temporal} from '@js-temporal/polyfill';
 import type {
   CustomElement,
   PackageInfo,
@@ -146,4 +147,12 @@ export interface Repository {
     packageName: string,
     version: string
   ): Promise<PackageVersion | undefined>;
+
+  /**
+   * Returns packages that have not been updated since the date given.
+   */
+  getPackagesToUpdate(
+    notUpdatedSince: Temporal.Instant,
+    limit: number
+  ): Promise<Array<PackageInfo>>;
 }
diff --git a/packages/catalog-server/src/lib/server/routes/bootstrap-packages.ts b/packages/catalog-server/src/lib/server/routes/bootstrap-packages.ts
index 7e8ad7d0..a17c5539 100644
--- a/packages/catalog-server/src/lib/server/routes/bootstrap-packages.ts
+++ b/packages/catalog-server/src/lib/server/routes/bootstrap-packages.ts
@@ -22,6 +22,10 @@ export const makeBootstrapPackagesRoute =
     const bootstrapListFile = await readFile(bootstrapListFilePath, 'utf-8');
     const bootstrapList = JSON.parse(bootstrapListFile);
     const packageNames = bootstrapList['packages'] as Array<string>;
+
+    // TODO (justinfagnani): rather than import the packages directly, add them
+    // to the DB in a non-imported state, then kick off the standard update
+    // workflow, which will import them all.
     const results = await Promise.all(
       packageNames.map(
         async (
diff --git a/packages/catalog-server/src/lib/server/routes/update-packages.ts b/packages/catalog-server/src/lib/server/routes/update-packages.ts
new file mode 100644
index 00000000..443a31a3
--- /dev/null
+++ b/packages/catalog-server/src/lib/server/routes/update-packages.ts
@@ -0,0 +1,92 @@
+import {Temporal} from '@js-temporal/polyfill';
+import {PackageInfo} from '@webcomponents/catalog-api/lib/schema.js';
+import type Koa from 'koa';
+import type {Catalog} from '../../catalog.js';
+
+// Google Cloud Run default request timeout is 5 minutes, so to do longer
+// imports we need to configure the timeout.
+const maxImportDuration = Temporal.Duration.from({minutes: 5});
+
+export const makeUpdatePackagesRoute =
+  (catalog: Catalog) => async (context: Koa.Context) => {
+    const startInstant = Temporal.Now.instant();
+    // If the `force` query parameter is present we force updating of all
+    // packages by setting the `notUpdatedSince` parameter to `startInstant` so
+    // that we get all packages last updated before now. We calculate the
+    // `notUpdatedSince` time once before updates so that we don't retrieve
+    // packages that we update in this operation.
+    // `force`` is useful for development and testing as we may be trying to
+    // update packages that were just imported.
+    // TODO (justinfagnani): check a DEV mode also so this isn't available
+    // in production?
+    const force = 'force' in context.query;
+    const notUpdatedSince = force ? startInstant : undefined;
+
+    // If `force` is true, override the default packageUpdateInterval
+    // TODO: how do we make an actually 0 duration?
+    const packageUpdateInterval = force
+      ? Temporal.Duration.from({microseconds: 1})
+      : undefined;
+
+    console.log('Starting package update at', startInstant, `force: ${force}`);
+
+    let packagesToUpdate!: Array<PackageInfo>;
+    let packagesUpdated = 0;
+    let iteration = 0;
+
+    // Loop through batches of packages to update.
+    // We batch here so that we can pause and check that we're still within the
+    // maxImportDuration, and use small enough batches so that we can ensure at
+    // least one batch in that time.
+    do {
+      // getPackagesToUpdate() queries the first N (default 100) packages that
+      // have not been updated since the update interval (default 6 hours).
+      // When a package is imported it's lastUpdate date will be updated and the
+      // next call to getPackagesToUpdate() will return the next 100 packages.
+      // This way we don't need a DB cursor to make progress through the
+      // package list.
+      packagesToUpdate = await catalog.getPackagesToUpdate(notUpdatedSince);
+
+      if (packagesToUpdate.length === 0) {
+        // No more packages to update
+        if (iteration === 0) {
+          console.log('No packages to update');
+        }
+        break;
+      }
+
+      await Promise.allSettled(
+        packagesToUpdate.map(async (pkg) => {
+          try {
+            return await catalog.importPackage(pkg.name, packageUpdateInterval);
+          } catch (e) {
+            console.error(e);
+            throw e;
+          }
+        })
+      );
+      packagesUpdated += packagesToUpdate.length;
+
+      const now = Temporal.Now.instant();
+      const timeSinceStart = now.since(startInstant);
+      // If the time since the update started is not less than that max import
+      // duration, stop.
+      // TODO (justinfagnani): we need a way to test this
+      if (Temporal.Duration.compare(timeSinceStart, maxImportDuration) !== -1) {
+        break;
+      }
+    } while (true);
+    console.log(`Updated ${packagesUpdated} packages`);
+
+    if (packagesToUpdate.length > 0) {
+      // TODO (justinfagnani): kick off new update request
+      console.log(`Not all packages were updated (${packagesToUpdate.length})`);
+    }
+
+    context.status = 200;
+    context.type = 'html';
+    context.body = `
+      <h1>Update Results</h1>
+      <p>Updated ${packagesUpdated} package</p>
+    `;
+  };
diff --git a/packages/catalog-server/src/lib/server/server.ts b/packages/catalog-server/src/lib/server/server.ts
index 1b0fc92d..36400f99 100644
--- a/packages/catalog-server/src/lib/server/server.ts
+++ b/packages/catalog-server/src/lib/server/server.ts
@@ -1,6 +1,6 @@
 /**
  * @license
- * Copyright 2021 Google LLC
+ * Copyright 2022 Google LLC
  * SPDX-License-Identifier: BSD-3-Clause
  */
 
@@ -17,6 +17,7 @@ import {NpmAndUnpkgFiles} from '@webcomponents/custom-elements-manifest-tools/li
 
 import {makeGraphQLRoute} from './routes/graphql.js';
 import {makeBootstrapPackagesRoute} from './routes/bootstrap-packages.js';
+import {makeUpdatePackagesRoute} from './routes/update-packages.js';
 
 export const makeServer = async () => {
   const files = new NpmAndUnpkgFiles();
@@ -32,6 +33,8 @@ export const makeServer = async () => {
 
   router.get('/bootstrap-packages', makeBootstrapPackagesRoute(catalog));
 
+  router.get('/update-packages', makeUpdatePackagesRoute(catalog));
+
   router.get('/', async (ctx) => {
     ctx.status = 200;
     ctx.type = 'html';