Dynamic credentials using expressions

{
  "name": "Dynamic credentials using expressions",
  "nodes": [
    {
      "id": "cc6f2b1e-0ed0-4d22-8a44-d7223ba283b4",
      "name": "n8n Form Trigger",
      "type": "n8n-nodes-base.formTrigger",
      "position": [
        560,
        520
      ],
      "webhookId": "da4071f2-7550-4dae-aa48-8bced4291643",
      "parameters": {
        "path": "da4071f2-7550-4dae-aa48-8bced4291643",
        "formTitle": "Test dynamic credentials",
        "formFields": {
          "values": [
            {
              "fieldLabel": "Enter your NASA API key",
              "requiredField": true
            }
          ]
        },
        "responseMode": "responseNode",
        "formDescription": "This form is for testing an n8n workflow that demonstrates setting credentials with expressions."
      },
      "typeVersion": 2
    },
    {
      "id": "ef336bae-3d4f-419c-ab5c-b9f0de89f170",
      "name": "NASA",
      "type": "n8n-nodes-base.nasa",
      "position": [
        900,
        520
      ],
      "parameters": {
        "additionalFields": {}
      },
      "credentials": {
        "nasaApi": {
          "id": "QDDBOZOD6k3ijL5t",
          "name": "NASA account"
        }
      },
      "typeVersion": 1
    },
    {
      "id": "143bcdb6-aca0-4dd8-9204-9777271cd230",
      "name": "Respond to Webhook",
      "type": "n8n-nodes-base.respondToWebhook",
      "position": [
        1220,
        520
      ],
      "parameters": {
        "options": {},
        "redirectURL": "={{ $json.url }}",
        "respondWith": "redirect"
      },
      "typeVersion": 1
    },
    {
      "id": "0a0dee23-fa16-4f09-b5e0-856f47fb53d0",
      "name": "Sticky Note",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        120,
        140
      ],
      "parameters": {
        "color": 4,
        "width": 322,
        "height": 564,
        "content": "This workflow shows how to set credentials dynamically using expressions.


First, set up your NASA credential: 

1. Create a new NASA credential.
1. Hover over **API Key**.
1. Toggle **Expression** on.
1. In the **API Key** field, enter `{{ $json[\"Enter your NASA API key\"] }}`.


Then, test the workflow:

1. Get an [API key from NASA](https://api.nasa.gov/)
2. Select **Test workflow**
3. Enter your key using the form.
4. The workflow runs and sends you to the NASA picture of the day.


For more information on expressions, refer to [n8n documentation | Expressions](https://docs.n8n.io/code/expressions/)."
      },
      "typeVersion": 1
    },
    {
      "id": "dd766e32-334d-4e46-9daa-7800b134a3a5",
      "name": "Sticky Note1",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        500,
        380
      ],
      "parameters": {
        "height": 319,
        "content": "User submits an API key using the form"
      },
      "typeVersion": 1
    },
    {
      "id": "3d8f02e6-e029-41dc-89ad-0f5cffe09348",
      "name": "Sticky Note2",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        820,
        380
      ],
      "parameters": {
        "color": 5,
        "height": 319,
        "content": "The workflow passes the key to the NASA node. You can reference the value using the expression `$json[\"Enter your NASA API key\"]`. This is also available to the node credential. "
      },
      "typeVersion": 1
    },
    {
      "id": "096eb6ab-c276-4687-9dc0-50e16a8f709a",
      "name": "Sticky Note3",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        1140,
        380
      ],
      "parameters": {
        "height": 319,
        "content": "The Respond to Webhook node controls the form response (in this example, redirecting the user to an image)"
      },
      "typeVersion": 1
    }
  ],
  "pinData": {},
  "connections": {
    "NASA": {
      "main": [
        [
          {
            "node": "Respond to Webhook",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "n8n Form Trigger": {
      "main": [
        [
          {
            "node": "NASA",
            "type": "main",
            "index": 0
          }
        ]
      ]
    }
  }
}