diff --git a/addons/api/addon/adapters/scope.js b/addons/api/addon/adapters/scope.js
new file mode 100644
index 000000000..6d4549844
--- /dev/null
+++ b/addons/api/addon/adapters/scope.js
@@ -0,0 +1,27 @@
+import ApplicationAdapter from './application';
+import { serializeIntoHash } from '@ember-data/adapter/-private';
+
+export default class ScopeAdapter extends ApplicationAdapter {
+
+  /**
+   * Identical to default method except that we pass a query parameter
+   * indicating the parent scope.
+   * @override
+   * @param {Store} store
+   * @param {Model} type
+   * @param {Snapshot} snapshot
+   * @return {Promise} promise
+   */
+  createRecord(store, type, snapshot) {
+    const parentScopeID = snapshot.attr('scope').attr('scope_id');
+    let url =
+      this.buildURL(type.modelName, null, snapshot, 'createRecord');
+    // TODO this should be generalized into `buildURL`, but currently Ember Data
+    // doesn't provide a way to manage query parameters.  They are passed on
+    // to the underlying ajax/fetch service.
+    url = `${url}?scope_id=${parentScopeID}`;
+    const data = serializeIntoHash(store, type, snapshot);
+    return this.ajax(url, 'POST', { data });
+  }
+
+}
diff --git a/addons/api/addon/serializers/scope.js b/addons/api/addon/serializers/scope.js
deleted file mode 100644
index 5767a8015..000000000
--- a/addons/api/addon/serializers/scope.js
+++ /dev/null
@@ -1,36 +0,0 @@
-import ApplicationSerializer from './application';
-
-export default class ScopeSerializer extends ApplicationSerializer {
-
-  // =attributes
-
-  attrs = {
-    scope: { serialize: true }
-  };
-
-  // =methods
-
-  /**
-   * While most resources do not serialize scope into a request body (scope
-   * is expressed in the URL), scopes themselves _do serialize scope_ as a
-   * string field `scope_id`.
-   * Otherwise delegate to default attribute serializer.
-   *
-   * @override
-   * @method serializeAttribute
-   * @param {Snapshot} snapshot
-   * @param {Object} json
-   * @param {String} key
-   * @param {Object} attribute
-   */
-  serializeAttribute(snapshot, json, key) {
-    const value = super.serializeAttribute(...arguments);
-    const parentScope = snapshot.attr('scope');
-    if (key === 'scope' && this._canSerialize(key) && parentScope) {
-      json.scope_id = parentScope.attr('scope_id');
-      delete json[key];
-    }
-    return value;
-  }
-
-}
diff --git a/addons/api/app/adapters/scope.js b/addons/api/app/adapters/scope.js
new file mode 100644
index 000000000..10878851f
--- /dev/null
+++ b/addons/api/app/adapters/scope.js
@@ -0,0 +1 @@
+export { default } from 'api/adapters/scope';
diff --git a/addons/api/app/serializers/scope.js b/addons/api/app/serializers/scope.js
deleted file mode 100644
index cdc15f3a2..000000000
--- a/addons/api/app/serializers/scope.js
+++ /dev/null
@@ -1 +0,0 @@
-export { default } from 'api/serializers/scope';
diff --git a/addons/api/tests/unit/adapters/scope-test.js b/addons/api/tests/unit/adapters/scope-test.js
new file mode 100644
index 000000000..7dcd482c7
--- /dev/null
+++ b/addons/api/tests/unit/adapters/scope-test.js
@@ -0,0 +1,23 @@
+import { module, test } from 'qunit';
+import { setupTest } from 'ember-qunit';
+import setupMirage from 'ember-cli-mirage/test-support/setup-mirage';
+
+module('Unit | Adapter | scope', function(hooks) {
+  setupTest(hooks);
+  setupMirage(hooks);
+
+  test('it generates correct createRecord URLs with a scope_id query parameter', function (assert) {
+    assert.expect(1);
+    this.server.post('/v1/scopes', (schema, { queryParams }) =>{
+      assert.equal(queryParams.scope_id, 'o_1');
+    });
+    const store = this.owner.lookup('service:store');
+    const scope = store.createRecord('scope', {
+      scopeID: 'o_1'
+    });
+    const type = scope.constructor;
+    const snapshot = scope._createSnapshot();
+    const adapter = this.owner.lookup('adapter:scope');
+    adapter.createRecord(store, type, snapshot);
+  });
+});
diff --git a/addons/api/tests/unit/serializers/scope-test.js b/addons/api/tests/unit/serializers/scope-test.js
deleted file mode 100644
index 3993238fe..000000000
--- a/addons/api/tests/unit/serializers/scope-test.js
+++ /dev/null
@@ -1,32 +0,0 @@
-import { module, test } from 'qunit';
-import { setupTest } from 'ember-qunit';
-
-module('Unit | Serializer | scope', function(hooks) {
-  setupTest(hooks);
-
-  // Replace this with your real tests.
-  test('it exists', function(assert) {
-    let store = this.owner.lookup('service:store');
-    let serializer = store.serializerFor('scope');
-
-    assert.ok(serializer);
-  });
-
-  test('it serializes records', function (assert) {
-    assert.expect(1);
-    const store = this.owner.lookup('service:store');
-    const record = store.createRecord('scope', {
-      type: 'org',
-      name: 'User',
-      description: 'Description',
-      scopeID: 'global'
-    });
-    const serializedRecord = record.serialize();
-    assert.deepEqual(serializedRecord, {
-      type: 'org',
-      name: 'User',
-      description: 'Description',
-      scope_id: 'global'
-    });
-  });
-});
diff --git a/ui/core/mirage/config.js b/ui/core/mirage/config.js
index 6e554c34a..ed6859c83 100644
--- a/ui/core/mirage/config.js
+++ b/ui/core/mirage/config.js
@@ -29,8 +29,7 @@ export default function() {
     // to be expanded to a scope object `scope: {id:..., type:...}` before
     // saving, which is the gist of this function.
     const attrs = this.normalizedRequestAttrs();
-    const parentScopeAttrs = this.serialize(scopes.find(attrs.scopeId));
-    delete attrs.scopeId;
+    const parentScopeAttrs = this.serialize(scopes.find(request.queryParams.scope_id));
     attrs.scope = parentScopeAttrs;
     return scopes.create(attrs);
   });