Fillout.io MCP Server

MCP Server for the Fillout.io API, enabling form management, response handling, and analytics.

Token Setup

1. Get your Fillout.io API Key:
2. Log in to your Fillout.io account
3. Go to Account Settings → API & Webhooks
4. Click "Create new API Key"

5. Copy your new API key

6. API Key Information:

7. Production keys start with fo_live_
8. Test keys start with fo_test_
9. Test keys only work with test forms

10. API keys provide access to all resources in your account

11. Replace your-fillout-api-key in the configuration with your API key.

⚠️ Security Notes: - Keep your API key secure and private - Use test keys for development - Store keys in environment variables - Rotate keys periodically - Never commit keys to version control

Token Troubleshooting

Common Error Messages

1. "Invalid API key provided" or "Authentication failed"
2. Cause: API key is missing, malformed, or invalid

3. Solution:

   • Verify key starts with fo_live_ or fo_test_
   • Check for extra spaces or characters
   • Ensure environment variable is set correctly
   • Create a new key if necessary

4. "Test mode key used with live form"

5. Cause: Using test key (fo_test_) with production form

6. Solution:

   • Use live key for production forms
   • Create test form for development
   • Switch to appropriate key type

7. "Rate limit exceeded"

8. Cause: Too many API requests
9. Solution:
   • Implement request throttling
   • Check usage in dashboard
   • Optimize request patterns

Validation Steps

1. Check API Key Format: ```bash # Key should:
2. Start with 'fo_live_' or 'fo_test_'
3. Be approximately 50 characters

4. Contain only letters, numbers, and underscores ```

5. Test API Key: bash curl -H "Authorization: Bearer your-api-key" \ https://api.fillout.com/v1/api/forms

Features

Form Management

• List all forms
• Get form details
• Create new forms
• Delete forms
• Update form settings

Response Handling

• Submit form responses
• Get form submissions
• Filter responses
• Export responses

Analytics

• Response rates
• Completion times
• Submission trends

Tools

1. list_forms
2. Get all accessible forms
3. Parameters:
   • limit (optional): Number of forms to return
   • offset (optional): Pagination offset

4. Returns: Array of form objects

5. get_form

6. Get detailed form information
7. Parameters:
   • formId (string): Form identifier

8. Returns: Form details including questions and settings

9. create_form

10. Create a new form
11. Parameters:
    • name (string): Form name
    • description (optional string): Form description
    • questions (array): Array of question objects
    • type: Question type (e.g., 'ShortAnswer', 'MultipleChoice')
    • name: Question text
    • required: Whether question is required
    • choices: Array of choices for multiple choice questions

12. Returns: Created form object

13. get_form_responses

14. Get form submissions
15. Parameters:
    • formId (string): Form identifier
    • filters (optional): Response filters
    • pageSize (optional): Results per page
    • afterDate (optional): Filter by submission date
    • beforeDate (optional): Filter by submission date
    • status (optional): Filter by completion status

16. Returns: Array of form responses

17. submit_form_response

18. Submit a new response
19. Parameters:
    • formId (string): Form identifier
    • responses (array): Array of answers
    • questionId: Question identifier
    • value: Response value
    • calculations (optional): Custom calculations
20. Returns: Submission confirmation

Setup

Usage with Claude Desktop

Docker Configuration

{
  "mcpServers": {
    "fillout": {
      "command": "docker",
      "args": [
        "run",
        "-i",
        "--rm",
        "-e",
        "FILLOUT_API_KEY",
        "mcp/fillout"
      ],
      "env": {
        "FILLOUT_API_KEY": "your-fillout-api-key"
      }
    }
  }
}

NPX Configuration

{
  "mcpServers": {
    "fillout": {
      "command": "npx",
      "args": [
        "-y",
        "@modelcontextprotocol/server-fillout"
      ],
      "env": {
        "FILLOUT_API_KEY": "your-fillout-api-key"
      }
    }
  }
}

Building

Prerequisites

• Node.js 18 or later
• npm or yarn
• Docker (optional)

Local Development

# Install dependencies
npm install

# Run in development mode
npm run dev

# Build for production
npm run build

Docker Build

# Build image
docker build -t mcp/fillout .

# Run container
docker run -e FILLOUT_API_KEY=your-key mcp/fillout

Examples

Creating a Form

const form = await client.createForm({
  name: "Customer Feedback",
  description: "Please share your experience",
  questions: [
    {
      type: "ShortAnswer",
      name: "What did you like most?",
      required: true
    },
    {
      type: "MultipleChoice",
      name: "Would you recommend us?",
      required: true,
      choices: ["Yes", "No", "Maybe"]
    }
  ]
});

Submitting a Response

const response = await client.submitFormResponse(formId, {
  responses: [
    {
      questionId: "q1",
      value: "Great customer service!"
    },
    {
      questionId: "q2",
      value: "Yes"
    }
  ]
});

Error Handling

The server provides detailed error messages for common issues:

try {
  const forms = await client.listForms();
} catch (error) {
  if (error instanceof AuthenticationError) {
    // Handle invalid API key
  } else if (error instanceof FilloutError) {
    // Handle API-specific errors
  } else {
    // Handle unexpected errors
  }
}

License

This project is licensed under the MIT License. See the LICENSE file for details.