diff --git a/addons/api/addon/models/target.js b/addons/api/addon/models/target.js
index a00c3b182..d60596465 100644
--- a/addons/api/addon/models/target.js
+++ b/addons/api/addon/models/target.js
@@ -20,6 +20,16 @@ export default class TargetModel extends GeneratedTargetModel {
   })
   host_sets;
 
+  /**
+   * Credential library ids are read only and can be
+   * persisted via a dedicated call to `addCredentialLibraries()`.
+   */
+  @fragmentArray('fragment-string', {
+    readOnly: true,
+    emptyArrayIfMissing: true,
+  })
+  application_credential_library_ids;
+
   /**
    * An array of resolved host set and host catalog instances.  Model instances
    * must already be loaded into the store (this method will not load unloaded
@@ -36,6 +46,24 @@ export default class TargetModel extends GeneratedTargetModel {
       .filter((hostSetRef) => hostSetRef.model !== null);
   }
 
+  /**
+   * An array of resolved credential library instances.  Model instances
+   * must already be loaded into the store (this method will not load unloaded
+   * instances).  Unresolvable instances are excluded from the array.
+   * @type {[CredentialLibraryModel]}
+   */
+  @computed('application_credential_library_ids.[]', 'store')
+  get credentialLibraries() {
+    return this.application_credential_library_ids
+      .map((credential_library_fragment) =>
+        this.store.peekRecord(
+          'credential-library',
+          credential_library_fragment.value
+        )
+      )
+      .filter(Boolean);
+  }
+
   /**
    * Sessions associated with this target (but only already loaded sessions).
    * @type {SessionModel[]}
@@ -122,4 +150,66 @@ export default class TargetModel extends GeneratedTargetModel {
   removeHostSet(hostSetID, options) {
     return this.removeHostSets([hostSetID], options);
   }
+
+  /**
+   * Adds credential libraries via the `add-credential-libraries` method.
+   * See serializer and adapter for more information.
+   * @param {[string]} credentialLibraryIDs
+   * @param {object} options
+   * @param {object} options.adapterOptions
+   * @return {Promise}
+   */
+  addCredentialLibraries(
+    credentialLibraryIDs,
+    options = { adapterOptions: {} }
+  ) {
+    const defaultAdapterOptions = {
+      method: 'add-credential-libraries',
+      credentialLibraryIDs,
+    };
+    // There is no "deep merge" in ES.
+    return this.save({
+      ...options,
+      adapterOptions: {
+        ...defaultAdapterOptions,
+        ...options.adapterOptions,
+      },
+    });
+  }
+
+  /**
+   * Delete credential libraries via the `remove-credential-libraries` method.
+   * See serializer and adapter for more information.
+   * @param {[string]} credentialLibraryIDs
+   * @param {object} options
+   * @param {object} options.adapterOptions
+   * @return {Promise}
+   */
+  removeCredentialLibraries(
+    credentialLibraryIDs,
+    options = { adapterOptions: {} }
+  ) {
+    const defaultAdapterOptions = {
+      method: 'remove-credential-libraries',
+      credentialLibraryIDs,
+    };
+    // There is no "deep merge" in ES.
+    return this.save({
+      ...options,
+      adapterOptions: {
+        ...defaultAdapterOptions,
+        ...options.adapterOptions,
+      },
+    });
+  }
+
+  /**
+   * Delete a single credential library set via the `remove-credential-libraries` method.
+   * @param {number} credentialLibraryID
+   * @param {object} options
+   * @return {Promise}
+   */
+  removeCredentialLibrary(credentialLibraryID, options) {
+    return this.removeCredentialLibraries([credentialLibraryID], options);
+  }
 }
diff --git a/addons/api/addon/serializers/target.js b/addons/api/addon/serializers/target.js
index 4c6745b89..c287aca46 100644
--- a/addons/api/addon/serializers/target.js
+++ b/addons/api/addon/serializers/target.js
@@ -6,7 +6,11 @@ export default class TargetSerializer extends ApplicationSerializer {
   /**
    * If `adapterOptions.hostSets` is set to an array of host set models,
    * the resulting target serialization should include **only host sets**
-   * and the version.  Normally, host sets are not serialized.
+   * and the version.
+   * If `adapterOptions.credentialLibraries` is set to an array of
+   * credential library models, the resulting target serialization should
+   * include **only credential libraries** and the version.
+   * Normally, neither host sets or credential libraries are not serialized.
    * @override
    * @param {Snapshot} snapshot
    * @return {object}
@@ -16,6 +20,12 @@ export default class TargetSerializer extends ApplicationSerializer {
     const hostSetIDs = snapshot?.adapterOptions?.hostSetIDs;
     if (hostSetIDs)
       serialized = this.serializeWithHostSets(snapshot, hostSetIDs);
+    const credentialLibraryIDs = snapshot?.adapterOptions?.credentialLibraryIDs;
+    if (credentialLibraryIDs)
+      serialized = this.serializeWithCredentialLibraries(
+        snapshot,
+        credentialLibraryIDs
+      );
     return serialized;
   }
 
@@ -32,4 +42,18 @@ export default class TargetSerializer extends ApplicationSerializer {
       host_set_ids: hostSetIDs,
     };
   }
+
+  /**
+   * Returns a payload containing only the credential_library_ids array using IDs
+   * passed into the function (rather than existing credential libraries on the model).
+   * @param {Snapshot} snapshot
+   * @param {[string]} credentialLibraryIDs
+   * @return {object}
+   */
+  serializeWithCredentialLibraries(snapshot, credentialLibraryIDs) {
+    return {
+      version: snapshot.attr('version'),
+      application_credential_library_ids: credentialLibraryIDs,
+    };
+  }
 }
diff --git a/addons/api/mirage/config.js b/addons/api/mirage/config.js
index 9a1fccb8e..c1b535a41 100644
--- a/addons/api/mirage/config.js
+++ b/addons/api/mirage/config.js
@@ -366,10 +366,10 @@ export default function () {
       const target = targets.find(id);
       const updatedAttrs = {
         version: attrs.version,
-        hostSetIds: target.hostSetIds,
       };
       // If adding host sets, push them into the array
       if (method === 'add-host-sets') {
+        updatedAttrs.hostSetIds = target.hostSetIds;
         attrs.hostSetIds.forEach((id) => {
           if (!updatedAttrs.hostSetIds.includes(id)) {
             updatedAttrs.hostSetIds.push(id);
@@ -378,10 +378,28 @@ export default function () {
       }
       // If deleting host sets, filter them out of the array
       if (method === 'remove-host-sets') {
+        updatedAttrs.hostSetIds = target.hostSetIds;
         updatedAttrs.hostSetIds = updatedAttrs.hostSetIds.filter((id) => {
           return !attrs.hostSetIds.includes(id);
         });
       }
+      // If adding credential libraries, push them into the array
+      if (method === 'add-credential-libraries') {
+        updatedAttrs.credentialLibraryIds = target.credentialLibraryIds;
+        attrs.applicationCredentialLibraryIds.forEach((id) => {
+          if (!updatedAttrs.credentialLibraryIds.includes(id)) {
+            updatedAttrs.credentialLibraryIds.push(id);
+          }
+        });
+      }
+      // If deleting credential libraries, filter them out of the array
+      if (method === 'remove-credential-libraries') {
+        updatedAttrs.credentialLibraryIds = target.credentialLibraryIds;
+        updatedAttrs.credentialLibraryIds =
+          updatedAttrs.credentialLibraryIds.filter((id) => {
+            return !attrs.applicationCredentialLibraryIds.includes(id);
+          });
+      }
       return target.update(updatedAttrs);
     }
   );
diff --git a/addons/api/mirage/factories/target.js b/addons/api/mirage/factories/target.js
index dc1c97d00..e40df6abf 100644
--- a/addons/api/mirage/factories/target.js
+++ b/addons/api/mirage/factories/target.js
@@ -7,7 +7,7 @@ const hostSetChance = 0.3;
 
 export default factory.extend({
   /**
-   * -1 means "unlimited" and we want to generate these on occassion.
+   * -1 means "unlimited" and we want to generate these on occasion.
    */
   session_connection_limit: () => random.arrayElement([-1, datatype.number()]),
 
@@ -25,11 +25,11 @@ export default factory.extend({
   },
 
   /**
-   * Randomly selects existing host sets to assign to target.
+   * Randomly selects existing host sets and credential libraries to assign to target.
    */
-  withRandomHostSets: trait({
+  withAssociations: trait({
     afterCreate(target, server) {
-      let randomlySelectedHostSets;
+      let randomlySelectedHostSets, randomlySelectedCredentialLibraries;
       randomlySelectedHostSets = server.schema.hostSets
         // BLERG:  fun fact, for no reason at all, the element passed
         // into a where function is not a full model instance, as you might
@@ -38,7 +38,17 @@ export default factory.extend({
         // the result set of `where` _is a collection of model instances_.
         .where((hostSet) => hostSet.scopeId === target.scope.id)
         .models.filter(() => randomBoolean(hostSetChance));
-      target.update({ hostSets: randomlySelectedHostSets });
+
+      randomlySelectedCredentialLibraries = server.schema.credentialLibraries
+        .where(
+          (credentialLibrary) => credentialLibrary.scopeId === target.scope.id
+        )
+        .models.filter(() => randomBoolean());
+
+      target.update({
+        hostSets: randomlySelectedHostSets,
+        credentialLibraries: randomlySelectedCredentialLibraries,
+      });
     },
   }),
 });
diff --git a/addons/api/mirage/models/target.js b/addons/api/mirage/models/target.js
index 0f03cb6ef..389e255d2 100644
--- a/addons/api/mirage/models/target.js
+++ b/addons/api/mirage/models/target.js
@@ -3,4 +3,5 @@ import { Model, belongsTo, hasMany } from 'ember-cli-mirage';
 export default Model.extend({
   scope: belongsTo(),
   hostSets: hasMany(),
+  credentialLibraries: hasMany(),
 });
diff --git a/addons/api/mirage/scenarios/default.js b/addons/api/mirage/scenarios/default.js
index fc5931908..d448a443b 100644
--- a/addons/api/mirage/scenarios/default.js
+++ b/addons/api/mirage/scenarios/default.js
@@ -47,8 +47,8 @@ export default function (server) {
   // Other resources
   server.schema.scopes.where({ type: 'project' }).models.forEach((scope) => {
     server.createList('host-catalog', 2, { scope }, 'withChildren');
-    server.createList('target', 2, { scope }, 'withRandomHostSets');
     server.createList('session', 4, { scope }, 'withAssociations');
     server.createList('credential-store', 3, { scope }, 'withAssociations');
+    server.createList('target', 2, { scope }, 'withAssociations');
   });
 }
diff --git a/addons/api/mirage/serializers/target.js b/addons/api/mirage/serializers/target.js
index 006388773..b970f4853 100644
--- a/addons/api/mirage/serializers/target.js
+++ b/addons/api/mirage/serializers/target.js
@@ -23,6 +23,9 @@ export default ApplicationSerializer.extend({
         return { id: host_set_id, host_catalog_id };
       });
     }
+    if (model.credentialLibraryIds?.length) {
+      json.application_credential_library_ids = model.credentialLibraryIds;
+    }
     return json;
   },
 });
diff --git a/addons/api/tests/unit/models/target-test.js b/addons/api/tests/unit/models/target-test.js
index 18be834bd..1c6fa2b22 100644
--- a/addons/api/tests/unit/models/target-test.js
+++ b/addons/api/tests/unit/models/target-test.js
@@ -223,4 +223,162 @@ module('Unit | Model | target', function (hooks) {
       'Target has two associated sessions loaded in the store'
     );
   });
+
+  test('it has a `credentialLibraries` array of resolved model instances (if those instances are already in the store)', function (assert) {
+    assert.expect(4);
+    const store = this.owner.lookup('service:store');
+    store.push({
+      data: {
+        id: '123abc',
+        type: 'target',
+        attributes: {
+          application_credential_library_ids: [{ value: '1' }, { value: '2' }],
+        },
+      },
+    });
+    const target = store.peekRecord('target', '123abc');
+    assert.equal(
+      target.application_credential_library_ids.length,
+      2,
+      'Target has two entires in application_credential_library_ids'
+    );
+    assert.equal(
+      target.credentialLibraries.length,
+      0,
+      'Target has no resolved credentialLibraries because they are not loaded yet'
+    );
+    store.push({
+      data: {
+        id: '1',
+        type: 'credential-library',
+        attributes: {},
+      },
+    });
+    store.push({
+      data: {
+        id: '2',
+        type: 'credential-library',
+        attributes: {},
+      },
+    });
+    // Since `credentialLibraries` is computed on `application_credential_library_ids`,
+    // not the store itself, it's necessary to do this assignment to kick-off the
+    // computed update.
+    /* eslint-disable no-self-assign */
+    target.application_credential_library_ids =
+      target.application_credential_library_ids;
+    /* eslint-enable no-self-assign */
+    assert.equal(
+      target.application_credential_library_ids.length,
+      2,
+      'Target has two entires in application_credential_library_ids'
+    );
+    assert.equal(
+      target.credentialLibraries.length,
+      2,
+      'Target has two resolved credentialLibraries'
+    );
+  });
+
+  test('it has an `addCredentialLibraries` method that targets a specific POST API endpoint and serialization', async function (assert) {
+    assert.expect(1);
+    this.server.post(
+      '/v1/targets/123abc:add-credential-libraries',
+      (schema, request) => {
+        const body = JSON.parse(request.requestBody);
+        assert.deepEqual(body, {
+          application_credential_library_ids: ['123_abc', 'foobar'],
+          version: 1,
+        });
+        return { id: '123abc' };
+      }
+    );
+    const store = this.owner.lookup('service:store');
+    store.push({
+      data: {
+        id: '123abc',
+        type: 'target',
+        attributes: {
+          name: 'Target',
+          description: 'Description',
+          application_credential_library_ids: [{ value: '1' }, { value: '2' }],
+          version: 1,
+          scope: {
+            scope_id: 'o_1',
+            type: 'scope',
+          },
+        },
+      },
+    });
+    const model = store.peekRecord('target', '123abc');
+    await model.addCredentialLibraries(['123_abc', 'foobar']);
+  });
+
+  test('it has a `removeCredentialLibraries` method that targets a specific POST API endpoint and serialization', async function (assert) {
+    assert.expect(1);
+    this.server.post(
+      '/v1/targets/123abc:remove-credential-libraries',
+      (schema, request) => {
+        const body = JSON.parse(request.requestBody);
+        assert.deepEqual(body, {
+          application_credential_library_ids: ['1', '2'],
+          version: 1,
+        });
+        return { id: '123abc' };
+      }
+    );
+    const store = this.owner.lookup('service:store');
+    store.push({
+      data: {
+        id: '123abc',
+        type: 'target',
+        attributes: {
+          name: 'Target',
+          description: 'Description',
+          application_credential_library_ids: [{ value: '1' }, { value: '2' }],
+          version: 1,
+          scope: {
+            scope_id: 'o_1',
+            type: 'scope',
+          },
+        },
+      },
+    });
+    const model = store.peekRecord('target', '123abc');
+    await model.removeCredentialLibraries(['1', '2']);
+  });
+
+  test('it has a `removeCredentialLibrary` method that deletes a single credential library using `removeCredentialLibraries` method', async function (assert) {
+    assert.expect(1);
+    this.server.post(
+      '/v1/targets/123abc:remove-credential-libraries',
+      (schema, request) => {
+        const body = JSON.parse(request.requestBody);
+        assert.deepEqual(body, {
+          application_credential_library_ids: ['2'],
+          version: 1,
+        });
+        return { id: '123abc' };
+      }
+    );
+    const store = this.owner.lookup('service:store');
+    store.push({
+      data: {
+        id: '123abc',
+        type: 'target',
+        attributes: {
+          name: 'Target',
+          description: 'Description',
+          application_credential_library_ids: [{ value: '1' }, { value: '2' }],
+          version: 1,
+          scope: {
+            scope_id: 'o_1',
+            type: 'scope',
+          },
+        },
+      },
+    });
+    const model = store.peekRecord('target', '123abc');
+    await model.removeCredentialLibrary('2');
+  });
 });
diff --git a/addons/api/tests/unit/serializers/application-test.js b/addons/api/tests/unit/serializers/application-test.js
index a7040e876..c2fe164c9 100644
--- a/addons/api/tests/unit/serializers/application-test.js
+++ b/addons/api/tests/unit/serializers/application-test.js
@@ -203,6 +203,7 @@ module('Unit | Serializer | application', function (hooks) {
           name: 'Target 1',
           scope: { scope_id: 'o_123' },
           host_sets: [],
+          application_credential_library_ids: [],
         },
         relationships: {},
       },
diff --git a/addons/api/tests/unit/serializers/target-test.js b/addons/api/tests/unit/serializers/target-test.js
index 255faa9ac..12dcacd4b 100644
--- a/addons/api/tests/unit/serializers/target-test.js
+++ b/addons/api/tests/unit/serializers/target-test.js
@@ -4,7 +4,7 @@ import { setupTest } from 'ember-qunit';
 module('Unit | Serializer | target', function (hooks) {
   setupTest(hooks);
 
-  test('it serializes targets normally, without host sets', function (assert) {
+  test('it serializes targets normally, without host sets or credential libraries', function (assert) {
     assert.expect(1);
     const store = this.owner.lookup('service:store');
     const serializer = store.serializerFor('target');
@@ -15,6 +15,7 @@ module('Unit | Serializer | target', function (hooks) {
         { host_set_id: '1', host_catalog_id: '2' },
         { host_set_id: '3', host_catalog_id: '4' },
       ],
+      application_credential_library_ids: [{ value: '1' }, { value: '2' }],
       scope: {
         scope_id: 'org_1',
         type: 'org',
@@ -63,6 +64,27 @@ module('Unit | Serializer | target', function (hooks) {
     });
   });
 
+  test('it serializes only credential libraries and version when an `adapterOptions.credentialLibraryIDs` array is passed', function (assert) {
+    assert.expect(1);
+    const store = this.owner.lookup('service:store');
+    const serializer = store.serializerFor('target');
+    const record = store.createRecord('target', {
+      name: 'User',
+      description: 'Description',
+      application_credential_library_ids: [{ value: '1' }, { value: '2' }],
+      version: 1,
+    });
+    const snapshot = record._createSnapshot();
+    snapshot.adapterOptions = {
+      credentialLibraryIDs: ['4', '5'],
+    };
+    const serializedRecord = serializer.serialize(snapshot);
+    assert.deepEqual(serializedRecord, {
+      application_credential_library_ids: ['4', '5'],
+      version: 1,
+    });
+  });
+
   test('it normalizes records with array fields', function (assert) {
     assert.expect(1);
     const store = this.owner.lookup('service:store');
@@ -75,6 +97,7 @@ module('Unit | Serializer | target', function (hooks) {
         { host_set_id: '1', host_catalog_id: '2' },
         { host_set_id: '3', host_catalog_id: '4' },
       ],
+      application_credential_library_ids: ['1'],
     };
     const normalized = serializer.normalizeSingleResponse(
       store,
@@ -92,13 +115,14 @@ module('Unit | Serializer | target', function (hooks) {
             { host_set_id: '1', host_catalog_id: '2' },
             { host_set_id: '3', host_catalog_id: '4' },
           ],
+          application_credential_library_ids: [{ value: '1' }],
         },
         relationships: {},
       },
     });
   });
 
-  test('it normalizes missing host_sets to empty array', function (assert) {
+  test('it normalizes missing host_sets and credential libraries to empty array', function (assert) {
     assert.expect(1);
     const store = this.owner.lookup('service:store');
     const serializer = store.serializerFor('target');
@@ -122,6 +146,7 @@ module('Unit | Serializer | target', function (hooks) {
           name: 'Target 1',
           scope: { scope_id: 'o_123' },
           host_sets: [],
+          application_credential_library_ids: [],
         },
         relationships: {},
       },
diff --git a/ui/admin/tests/acceptance/sessions-test.js b/ui/admin/tests/acceptance/sessions-test.js
index 15a263925..d5f68ffeb 100644
--- a/ui/admin/tests/acceptance/sessions-test.js
+++ b/ui/admin/tests/acceptance/sessions-test.js
@@ -55,7 +55,7 @@ module('Acceptance | sessions', function (hooks) {
       'target',
       1,
       { scope: instances.scopes.project },
-      'withRandomHostSets'
+      'withAssociations'
     );
     instances.sessions = this.server.createList(
       'session',
diff --git a/ui/desktop/tests/acceptance/origin-test.js b/ui/desktop/tests/acceptance/origin-test.js
index eddad56bb..6eb0c5d22 100644
--- a/ui/desktop/tests/acceptance/origin-test.js
+++ b/ui/desktop/tests/acceptance/origin-test.js
@@ -97,7 +97,7 @@ module('Acceptance | origin', function (hooks) {
     instances.target = this.server.create(
       'target',
       { scope: instances.scopes.project },
-      'withRandomHostSets'
+      'withAssociations'
     );
 
     urls.scopes.global = `/scopes/${instances.scopes.global.id}`;
diff --git a/ui/desktop/tests/acceptance/projects-test.js b/ui/desktop/tests/acceptance/projects-test.js
index 38d54b480..3f6dd5506 100644
--- a/ui/desktop/tests/acceptance/projects-test.js
+++ b/ui/desktop/tests/acceptance/projects-test.js
@@ -92,7 +92,7 @@ module('Acceptance | projects', function (hooks) {
     instances.target = this.server.create(
       'target',
       { scope: instances.scopes.project },
-      'withRandomHostSets'
+      'withAssociations'
     );
 
     urls.scopes.global = `/scopes/${instances.scopes.global.id}`;
diff --git a/ui/desktop/tests/acceptance/projects/sessions-test.js b/ui/desktop/tests/acceptance/projects/sessions-test.js
index 2cdbafc16..2b31e5eaa 100644
--- a/ui/desktop/tests/acceptance/projects/sessions-test.js
+++ b/ui/desktop/tests/acceptance/projects/sessions-test.js
@@ -97,7 +97,7 @@ module('Acceptance | projects | sessions', function (hooks) {
     instances.target = this.server.create(
       'target',
       { scope: instances.scopes.project },
-      'withRandomHostSets'
+      'withAssociations'
     );
     instances.session = this.server.create(
       'session',
diff --git a/ui/desktop/tests/acceptance/projects/targets-test.js b/ui/desktop/tests/acceptance/projects/targets-test.js
index 81dfbb22b..2fb027eec 100644
--- a/ui/desktop/tests/acceptance/projects/targets-test.js
+++ b/ui/desktop/tests/acceptance/projects/targets-test.js
@@ -101,7 +101,7 @@ module('Acceptance | projects | targets', function (hooks) {
     instances.target = this.server.create(
       'target',
       { scope: instances.scopes.project },
-      'withRandomHostSets'
+      'withAssociations'
     );
 
     instances.session = this.server.create(
diff --git a/ui/desktop/tests/acceptance/projects/targets/sessions-test.js b/ui/desktop/tests/acceptance/projects/targets/sessions-test.js
index 6bfe8bd89..f687be5d1 100644
--- a/ui/desktop/tests/acceptance/projects/targets/sessions-test.js
+++ b/ui/desktop/tests/acceptance/projects/targets/sessions-test.js
@@ -106,7 +106,7 @@ module('Acceptance | projects | targets | sessions', function (hooks) {
     instances.target = this.server.create(
       'target',
       { scope: instances.scopes.project },
-      'withRandomHostSets'
+      'withAssociations'
     );
 
     instances.session = this.server.create(
diff --git a/ui/desktop/tests/acceptance/scopes-test.js b/ui/desktop/tests/acceptance/scopes-test.js
index 93ec928bb..71907a984 100644
--- a/ui/desktop/tests/acceptance/scopes-test.js
+++ b/ui/desktop/tests/acceptance/scopes-test.js
@@ -110,7 +110,7 @@ module('Acceptance | scopes', function (hooks) {
     instances.target = this.server.create(
       'target',
       { scope: instances.scopes.project },
-      'withRandomHostSets'
+      'withAssociations'
     );
 
     instances.session = this.server.create(
diff --git a/ui/desktop/tests/acceptance/targets-test.js b/ui/desktop/tests/acceptance/targets-test.js
index 85881b7ec..f92168c3a 100644
--- a/ui/desktop/tests/acceptance/targets-test.js
+++ b/ui/desktop/tests/acceptance/targets-test.js
@@ -94,7 +94,7 @@ module('Acceptance | targets', function (hooks) {
     instances.target = this.server.create(
       'target',
       { scope: instances.scopes.project },
-      'withRandomHostSets'
+      'withAssociations'
     );
 
     urls.scopes.global = `/scopes/${instances.scopes.global.id}`;