diff --git a/x-pack/plugins/ingest_manager/common/openapi/spec_oas3.json b/x-pack/plugins/ingest_manager/common/openapi/spec_oas3.json
index e16edac5ddb7a..cfae2c450c824 100644
--- a/x-pack/plugins/ingest_manager/common/openapi/spec_oas3.json
+++ b/x-pack/plugins/ingest_manager/common/openapi/spec_oas3.json
@@ -922,7 +922,7 @@
       },
       "parameters": []
     },
-    "/packageConfigs": {
+    "/package_configs": {
       "get": {
         "summary": "PackageConfigs - List",
         "tags": [],
@@ -1237,7 +1237,7 @@
         ]
       }
     },
-    "/packageConfigs/{packageConfigId}": {
+    "/package_configs/{packageConfigId}": {
       "get": {
         "summary": "PackageConfigs - Info",
         "tags": [],
diff --git a/x-pack/plugins/ingest_manager/server/routes/package_config/handlers.ts b/x-pack/plugins/ingest_manager/server/routes/package_config/handlers.ts
index 6b0c2fe9c2ff7..d2820cdbeb6c8 100644
--- a/x-pack/plugins/ingest_manager/server/routes/package_config/handlers.ts
+++ b/x-pack/plugins/ingest_manager/server/routes/package_config/handlers.ts
@@ -5,7 +5,7 @@
  */
 import { TypeOf } from '@kbn/config-schema';
 import Boom from 'boom';
-import { RequestHandler } from 'src/core/server';
+import { RequestHandler, SavedObjectsErrorHelpers } from '../../../../../../src/core/server';
 import { appContextService, packageConfigService } from '../../services';
 import { getPackageInfo } from '../../services/epm/packages';
 import {
@@ -49,8 +49,12 @@ export const getOnePackageConfigHandler: RequestHandler<TypeOf<
   typeof GetOnePackageConfigRequestSchema.params
 >> = async (context, request, response) => {
   const soClient = context.core.savedObjects.client;
+  const { packageConfigId } = request.params;
+  const notFoundResponse = () =>
+    response.notFound({ body: { message: `Package config ${packageConfigId} not found` } });
+
   try {
-    const packageConfig = await packageConfigService.get(soClient, request.params.packageConfigId);
+    const packageConfig = await packageConfigService.get(soClient, packageConfigId);
     if (packageConfig) {
       return response.ok({
         body: {
@@ -58,17 +62,18 @@ export const getOnePackageConfigHandler: RequestHandler<TypeOf<
           success: true,
         },
       });
+    } else {
+      return notFoundResponse();
+    }
+  } catch (e) {
+    if (SavedObjectsErrorHelpers.isNotFoundError(e)) {
+      return notFoundResponse();
     } else {
       return response.customError({
-        statusCode: 404,
-        body: { message: 'Package config not found' },
+        statusCode: 500,
+        body: { message: e.message },
       });
     }
-  } catch (e) {
-    return response.customError({
-      statusCode: 500,
-      body: { message: e.message },
-    });
   }
 };
 
diff --git a/x-pack/plugins/ingest_manager/server/services/agent_config.ts b/x-pack/plugins/ingest_manager/server/services/agent_config.ts
index 3886146e28806..63d4e6f012e07 100644
--- a/x-pack/plugins/ingest_manager/server/services/agent_config.ts
+++ b/x-pack/plugins/ingest_manager/server/services/agent_config.ts
@@ -334,7 +334,7 @@ class AgentConfigService {
       throw new Error('Agent configuration not found');
     }
 
-    const defaultConfigId = await this.getDefaultAgentConfigId(soClient);
+    const { id: defaultConfigId } = await this.ensureDefaultAgentConfig(soClient);
     if (id === defaultConfigId) {
       throw new Error('The default agent configuration cannot be deleted');
     }
diff --git a/x-pack/test/ingest_manager_api_integration/apis/index.js b/x-pack/test/ingest_manager_api_integration/apis/index.js
index 1045ff5d82d12..d21b80bd6eed7 100644
--- a/x-pack/test/ingest_manager_api_integration/apis/index.js
+++ b/x-pack/test/ingest_manager_api_integration/apis/index.js
@@ -22,6 +22,7 @@ export default function ({ loadTestFile }) {
     // Package configs
     loadTestFile(require.resolve('./package_config/create'));
     loadTestFile(require.resolve('./package_config/update'));
+    loadTestFile(require.resolve('./package_config/get'));
     // Agent config
     loadTestFile(require.resolve('./agent_config/index'));
   });
diff --git a/x-pack/test/ingest_manager_api_integration/apis/package_config/get.ts b/x-pack/test/ingest_manager_api_integration/apis/package_config/get.ts
new file mode 100644
index 0000000000000..94b7543d982ad
--- /dev/null
+++ b/x-pack/test/ingest_manager_api_integration/apis/package_config/get.ts
@@ -0,0 +1,89 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License;
+ * you may not use this file except in compliance with the Elastic License.
+ */
+
+import expect from '@kbn/expect';
+import { FtrProviderContext } from '../../../api_integration/ftr_provider_context';
+import { skipIfNoDockerRegistry } from '../../helpers';
+
+export default function (providerContext: FtrProviderContext) {
+  const { getService } = providerContext;
+  const supertest = getService('supertest');
+  const dockerServers = getService('dockerServers');
+
+  const server = dockerServers.get('registry');
+  // use function () {} and not () => {} here
+  // because `this` has to point to the Mocha context
+  // see https://mochajs.org/#arrow-functions
+
+  describe('Package Config - get by id', async function () {
+    skipIfNoDockerRegistry(providerContext);
+    let agentConfigId: string;
+    let packageConfigId: string;
+
+    before(async function () {
+      if (!server.enabled) {
+        return;
+      }
+      const { body: agentConfigResponse } = await supertest
+        .post(`/api/ingest_manager/agent_configs`)
+        .set('kbn-xsrf', 'xxxx')
+        .send({
+          name: 'Test config',
+          namespace: 'default',
+        });
+      agentConfigId = agentConfigResponse.item.id;
+
+      const { body: packageConfigResponse } = await supertest
+        .post(`/api/ingest_manager/package_configs`)
+        .set('kbn-xsrf', 'xxxx')
+        .send({
+          name: 'filetest-1',
+          description: '',
+          namespace: 'default',
+          config_id: agentConfigId,
+          enabled: true,
+          output_id: '',
+          inputs: [],
+          package: {
+            name: 'filetest',
+            title: 'For File Tests',
+            version: '0.1.0',
+          },
+        });
+      packageConfigId = packageConfigResponse.item.id;
+    });
+
+    after(async function () {
+      if (!server.enabled) {
+        return;
+      }
+
+      await supertest
+        .post(`/api/ingest_manager/agent_configs/delete`)
+        .set('kbn-xsrf', 'xxxx')
+        .send({ agentConfigId })
+        .expect(200);
+
+      await supertest
+        .post(`/api/ingest_manager/package_configs/delete`)
+        .set('kbn-xsrf', 'xxxx')
+        .send({ packageConfigIds: [packageConfigId] })
+        .expect(200);
+    });
+
+    it('should succeed with a valid id', async function () {
+      const { body: apiResponse } = await supertest
+        .get(`/api/ingest_manager/package_configs/${packageConfigId}`)
+        .expect(200);
+
+      expect(apiResponse.success).to.be(true);
+    });
+
+    it('should return a 404 with an invalid id', async function () {
+      await supertest.get(`/api/ingest_manager/package_configs/IS_NOT_PRESENT`).expect(404);
+    });
+  });
+}
diff --git a/x-pack/test/security_solution_endpoint/apps/endpoint/policy_details.ts b/x-pack/test/security_solution_endpoint/apps/endpoint/policy_details.ts
index 62ffd15e1488f..d4947222a6cc0 100644
--- a/x-pack/test/security_solution_endpoint/apps/endpoint/policy_details.ts
+++ b/x-pack/test/security_solution_endpoint/apps/endpoint/policy_details.ts
@@ -27,7 +27,7 @@ export default function ({ getPageObjects, getService }: FtrProviderContext) {
         await pageObjects.policy.navigateToPolicyDetails('invalid-id');
         await testSubjects.existOrFail('policyDetailsIdNotFoundMessage');
         expect(await testSubjects.getVisibleText('policyDetailsIdNotFoundMessage')).to.equal(
-          'Saved object [ingest-package-configs/invalid-id] not found'
+          'Package config invalid-id not found'
         );
       });
     });