---
schema_version: "1"
id: 7a8cd05fbb7d0b7749f2905947f3f1195ec442ee8ceed04b6b080e4f9bbf4ce5
title: Configure Responses for Your GraphQL Implementation
collection: mulesoft
version: current
locale: en-us
portal_url: https://docs.salesforce.com/mulesoft/current/en-us/anypoint-code-builder/tut-graphql-configure-flow-responses.md
canonical_url: https://docs.mulesoft.com/anypoint-code-builder/tut-graphql-configure-flow-responses
source_site: docs.mulesoft.com
content_type: documentation
content_hash: 2013047e0a992218492d450008dfb51ce8fe595b6da5858a61dacdb1f8a2974c
description: MuleSoft Documentation Site
latest: true
---
---
product: Anypoint Code Builder
version: master
---

# Configure Responses for Your GraphQL Implementation

> For the full documentation index, see: https://docs.mulesoft.com/llms.txt

Configure your GraphQL implementation to return a specific response for each flow.

## Before You Begin

Complete these procedures:

- [Implement a GraphQL API](https://docs.mulesoft.com/anypoint-code-builder/tut-graphql-implement-api).

- [Test Your GraphQL Project](https://docs.mulesoft.com/anypoint-code-builder/tut-graphql-test-first-implementation)

## Add Logic to Your Flows

1.  In Anypoint Code Builder, open the **Books Implementation** project.

2.  From the Explorer, open `flows.xml` from the project directory.

3.  Within the `Query.bookById` flow, _replace_ the **Set Payload** component after the
    `<graphql-router:data-fetcher/>` element with the following Set Payload configuration:

    ```XML
    <set-payload value='{"id": 1, "name": "My Book", "pageCount": 28, "author": "author-1"}' mimeType="application/json" />
    ```

    The XML for the `Query.bookById` flow now has this configuration:

    ```XML
    <flow name="Query.bookById">
      <graphql-router:data-fetcher xmlns:graphql-router="http://www.mulesoft.org/schema/mule/graphql-router" config-ref="api-router-config" objectTypeName="Query" fieldName="bookById"/>
      <set-payload value='{"id": 1, "name": "My Book", "pageCount": 28, "author": "author-1"}' mimeType="application/json" />
      <graphql-router:serialize xmlns:graphql-router="http://www.mulesoft.org/schema/mule/graphql-router" config-ref="api-router-config" objectTypeName="Query" fieldName="bookById"/>
    </flow>
    ```

4.  Rebuild the application by clicking the ![](/mulesoft/current/en-us/anypoint-code-builder/_images/icon-run-debug.png) (**Run and Debug**) icon
    in the activity bar, and then clicking the **Start Debugging (F5)** icon.

5.  Open the Terminal window in the console:

    - Select **View** > **Terminal**.

    - Alternatively, press Ctrl and then press the backtick key (\`).

      If the application is already running, click **Start New** to rerun the application in debug
      mode.

6.  Run the following `curl` command from the command prompt:

    ```curl
    curl --request POST \
    --location 'http://localhost:8081/graphql' \
    --header 'Content-Type: application/json' \
    --data '{
        "query": "query bookById($id: ID) {bookById(id: $id){ id name pageCount author{ id firstName lastName}}}",
        "variables": {
            "id": 1
        }
    }'
    ```

    Anypoint Code Builder returns your JSON response in the terminal (manually reformatted to
    enhance readability):

    ```JSON
    { "data": {
                "bookById": {
                              "id":"1",
                              "name":"My Book",
                              "pageCount":28,
                              "author": {
                                          "id":"urn:uuid:123e4567-e89b-12d3-a456-426655440000",
                                          "firstName":"This is some example data",
                                          "lastName":"Hello World!"
                                        }
                            }
              }
    }
    ```

After testing the `bookById` endpoint, you can use Set Payload to add mock responses for testing the
remaining flows. For example:

```XML
<flow name="api-main-flow">
  <http:listener xmlns:http="http://www.mulesoft.org/schema/mule/http" config-ref="http-listener-config" path="${http.listener.path}"/>
  <graphql-router:route xmlns:graphql-router="http://www.mulesoft.org/schema/mule/graphql-router" config-ref="api-router-config"/>
</flow>
<flow name="Query.bookById">
  <graphql-router:data-fetcher xmlns:graphql-router="http://www.mulesoft.org/schema/mule/graphql-router" config-ref="api-router-config" objectTypeName="Query" fieldName="bookById"/>
  <set-payload value='{"id": 1, "name": "My Book", "pageCount": 28, "author": "author-1"}' mimeType="application/json" />
  <graphql-router:serialize xmlns:graphql-router="http://www.mulesoft.org/schema/mule/graphql-router" config-ref="api-router-config" objectTypeName="Query" fieldName="bookById"/>
</flow>
<flow name="Query.books">
  <graphql-router:data-fetcher xmlns:graphql-router="http://www.mulesoft.org/schema/mule/graphql-router" config-ref="api-router-config" objectTypeName="Query" fieldName="books"/>
  <set-payload value='[{"id": 1, "name": "My Book", "pageCount": 28, "author": "author-1"},{"id": 2, "name": "His Book", "pageCount": 12, "author": "author-2"},{"id": 3, "name": "Her Book", "pageCount": 41, "author": "author-1"}]' mimeType="application/json"/>
  <graphql-router:serialize xmlns:graphql-router="http://www.mulesoft.org/schema/mule/graphql-router" config-ref="api-router-config" objectTypeName="Query" fieldName="books"/>
</flow>
<flow name="Query.bestsellers">
  <graphql-router:data-fetcher xmlns:graphql-router="http://www.mulesoft.org/schema/mule/graphql-router" config-ref="api-router-config" objectTypeName="Query" fieldName="bestsellers"/>
  <set-payload value='{"books": ["1,2"], "authors":["author-1", "author-2"]}' mimeType="application/json" />
  <graphql-router:serialize xmlns:graphql-router="http://www.mulesoft.org/schema/mule/graphql-router" config-ref="api-router-config" objectTypeName="Query" fieldName="bestsellers"/>
</flow>
<flow name="Book.author">
  <graphql-router:data-fetcher xmlns:graphql-router="http://www.mulesoft.org/schema/mule/graphql-router" config-ref="api-router-config" objectTypeName="Book" fieldName="author"/>
  <set-payload value='{"id": "author-1", "firstName": "John", "lastName": "Doe"}' mimeType="application/json" />
  <graphql-router:serialize xmlns:graphql-router="http://www.mulesoft.org/schema/mule/graphql-router" config-ref="api-router-config" objectTypeName="Book" fieldName="author"/>
</flow>
<flow name="Bestsellers.books">
  <graphql-router:data-fetcher xmlns:graphql-router="http://www.mulesoft.org/schema/mule/graphql-router" config-ref="api-router-config" objectTypeName="Bestsellers" fieldName="books"/>
  <set-payload value='[{"id": 1, "name": "My Book", "pageCount": 28, "author": "author-1"},{"id": 2, "name": "His Book", "pageCount": 12, "author": "author-2"},{"id": 2, "name": "Her Book", "pageCount": 41, "author": "author-1"}]' mimeType="application/json"/>
  <graphql-router:serialize xmlns:graphql-router="http://www.mulesoft.org/schema/mule/graphql-router" config-ref="api-router-config" objectTypeName="Bestsellers" fieldName="books"/>
</flow>
<flow name="Bestsellers.authors">
  <graphql-router:data-fetcher xmlns:graphql-router="http://www.mulesoft.org/schema/mule/graphql-router" config-ref="api-router-config" objectTypeName="Bestsellers" fieldName="authors"/>
  <set-payload value='[{"id": "author-1", "firstName": "John", "lastName": "Doe"},{"id": "author-2", "firstName": "Anie", "lastName": "Eberts"}]' mimeType="application/json" />
  <graphql-router:serialize xmlns:graphql-router="http://www.mulesoft.org/schema/mule/graphql-router" config-ref="api-router-config" objectTypeName="Bestsellers" fieldName="authors"/>
</flow>
```

[Test Your GraphQL Project](https://docs.mulesoft.com/anypoint-code-builder/tut-graphql-test-first-implementation)