diff --git a/src/datasources/order-api.ts b/src/datasources/order-api.ts
index a701053..66ca2a4 100644
--- a/src/datasources/order-api.ts
+++ b/src/datasources/order-api.ts
@@ -102,6 +102,24 @@ export class OrderAPI extends BaseSQLDataSource {
       .then((row) => this.createOrderFromRow(row));
   }
 
+  async getOrderByExternalId(
+    klarnaOrderId: string,
+    paypalTransactionId: string,
+  ): Promise<Order> {
+    const column = paypalTransactionId
+      ? 'paypal_transaction_id'
+      : 'klarna_order_id';
+    const value = paypalTransactionId ?? klarnaOrderId;
+
+    return this.knex
+      .select('*')
+      .from('orders')
+      .where(column, value)
+      .first()
+      .cache(MINUTE)
+      .then((row) => this.createOrderFromRow(row));
+  }
+
   async getOrderRowFieldMapping(): Promise<any> {
     // const fields = await this.knex.select('*').from('order-row_fields'); doesn't work becuase of string case...
     const fieldsRes = await this.cachedRaw('SELECT * from "order-row_fields"')
diff --git a/src/resolvers/orders-resolver.ts b/src/resolvers/orders-resolver.ts
index f369232..c614d6d 100644
--- a/src/resolvers/orders-resolver.ts
+++ b/src/resolvers/orders-resolver.ts
@@ -57,6 +57,18 @@ async function getOrder(_, { id }, { dataSources, auth }) {
   return (<OrderAPI>dataSources.orderApi).getOrderById(id);
 }
 
+async function orderByExternalId(
+  _,
+  { klarnaOrderId, paypalTransactionId },
+  { dataSources, auth },
+) {
+  checkAccess(['orders.read'], auth);
+  return (<OrderAPI>dataSources.orderApi).getOrderByExternalId(
+    klarnaOrderId,
+    paypalTransactionId,
+  );
+}
+
 export const orderTypeDefs = {
   ContactInformation,
   Order,
@@ -66,4 +78,5 @@ export const orderTypeDefs = {
 export const orderQueryTypeDefs = {
   orders: getOrdersResult,
   order: getOrder,
+  orderByExternalId: orderByExternalId,
 };
diff --git a/src/schema.graphql b/src/schema.graphql
index 3ae1a32..f1e47bf 100644
--- a/src/schema.graphql
+++ b/src/schema.graphql
@@ -19,6 +19,7 @@ directive @cacheControl(
 type Query {
   orders(pagination: PaginationInput!, filter: DateFilterInput!): OrdersResult
   order(id: ID!): Order
+  orderByExternalId(klarnaOrderId: ID, paypalTransactionId: ID): Order
   products(
     pagination: PaginationInput!
     filter: ProductsFilterInput