Adfin + mcp-use: Complete MCP Integration

Adfin is a MCP server that The only platform you need to get paid - all payments in one place, invoicing and accounting reconciliations with Adfin..

When integrated with mcp-use, you can:

• Monitor and manage customer credit status and payment tracking
• Create individual invoices with customizable details
• Upload and process multiple PDF invoices simultaneously

This guide provides step-by-step instructions to set up Adfin in mcp-use, including configuration, examples, and troubleshooting.

What You'll Achieve

After completing this setup:

• Adfin will be fully integrated and operational
• You can use Adfin tools directly in mcp-use
• All Adfin capabilities will be available for your workflows
• Access to 5 different tools

Prerequisites

Before starting, ensure you have:

• Adfin account email address
• Adfin account password
• mcp-use installed and configured
• Compatible operating system (Python 3.8+, Node.js 16+, pip Installation, npm/yarn Installation)

Installation

Step 1: Install Adfin

Configuration

Step 2: Configure mcp-use

1. Open mcp-use settings
2. Navigate to MCP server configuration
3. Add Adfin server with appropriate settings
4. Save and restart if needed

Examples

Once configured, you can use Adfin in mcp-use:

Credit Control Status Check

Review overall credit control status for all customers

Ask mcp-use: "Give me a credit control status check for all our customers"

Expected Result: Comprehensive report showing customer payment status, overdue amounts, and credit risks

Create New Invoice

Generate an invoice for a specific customer with custom terms

Ask mcp-use: "Create a new invoice for 60 GBP for Abc Def that is due in a week"

Expected Result: Invoice created with customer details, amount, and 7-day payment terms

Bulk Invoice Upload

Process multiple PDF invoices from a directory

Ask mcp-use: "Upload all pdf invoices from the invoices folder from my Desktop"

Expected Result: All PDF invoices processed, validated, and uploaded to Adfin system

Payment Reconciliation

Match received payments with outstanding invoices

Ask mcp-use: "Reconcile the payment of £1,250 received today with our outstanding invoices"

Expected Result: Payment matched to appropriate invoices with reconciliation details recorded

Testing Your Setup

1. Launch mcp-use
2. Verify Adfin is available in the tools list
3. Test basic Adfin functionality

Troubleshooting

Common Issues

Authentication Failed

Symptoms: Login errors, Invalid credentials messages, 401 Unauthorized

Cause: Incorrect ADFIN_EMAIL or ADFIN_PASSWORD

Solution:

• Verify email and password are correct in Adfin web interface
• Check for typos in environment variables
• Ensure credentials are not expired or locked
• Reset password if necessary through Adfin portal

UV Package Manager Not Found

Symptoms: Command not found errors, uv command fails

Cause: UV package manager not installed or not in PATH

Solution:

• Install uv: curl -LsSf https://astral.sh/uv/install.sh | sh
• Restart terminal to update PATH
• Verify installation: uv --version
• For Windows: use PowerShell installation script

PDF Invoice Processing Fails

Symptoms: Upload errors, PDF parsing failures, Invalid file format

Cause: Corrupted PDFs, unsupported format, or file permissions

Solution:

• Verify PDFs are valid and readable
• Check file permissions allow read access
• Ensure PDFs contain text (not just images)
• Try uploading files individually to isolate issues

Claude Desktop Configuration Error

Symptoms: MCP server not detected, Configuration syntax errors

Cause: Invalid JSON syntax or incorrect configuration structure

Solution:

• Validate JSON syntax in claude_desktop_config.json
• Ensure proper nesting of mcpServers configuration
• Check file is in correct location for Claude Desktop
• Restart Claude Desktop after configuration changes

Connection Refused or Server Unreachable

Symptoms: ECONNREFUSED error, Connection timeout, Cannot reach server

Cause: MCP server not running or incorrect URL

Solution:

• Verify MCP server is running and accessible
• Check server URL is correct (protocol, host, port, path)
• Test server URL in browser or with curl to confirm it responds
• Ensure firewall allows connections to server port
• Verify CORS settings if accessing from browser

Import Errors or Module Not Found

Symptoms: ModuleNotFoundError: mcp_use, Cannot find module "mcp-use"

Cause: Package not installed or wrong environment

Solution:

• Verify installation: pip show mcp-use (Python) or npm list mcp-use (JS)
• Ensure using correct Python virtual environment or Node.js project
• Reinstall package: pip install --upgrade mcp-use or npm install mcp-use
• Check package.json or requirements.txt includes mcp-use

Tool Discovery Returns Empty List

Symptoms: list_tools() returns [], No tools available, Tools not found

Cause: MCP server not properly configured or not exposing tools

Solution:

• Verify MCP server is properly initialized and configured
• Check server logs to confirm tools are registered
• Test server directly with MCP inspector or test client
• Ensure server implements MCP protocol correctly
• Verify transport type (HTTP/SSE) matches server configuration

Tool Execution Fails or Returns Errors

Symptoms: Tool call throws exception, Invalid arguments error, Execution timeout

Cause: Incorrect arguments or server-side execution failure

Solution:

• Verify tool arguments match schema definition from list_tools()
• Check required arguments are provided with correct types
• Review server logs for detailed error messages
• Test tool with minimal valid arguments first
• Increase timeout if tool requires longer execution time

LangChain.js Integration Not Working

Symptoms: getLangChainTools() fails, Tools not recognized by agent, Type errors

Cause: Version mismatch or incorrect integration setup

Solution:

• Ensure LangChain.js version is compatible with mcp-use
• Verify TypeScript version meets requirements
• Check tool schema conversion is working correctly
• Use latest versions of both mcp-use and LangChain.js
• Review LangChain.js documentation for agent setup

Transport Type Errors (HTTP vs SSE)

Symptoms: SSE connection fails, HTTP polling not working, Event stream errors

Cause: Mismatch between client transport and server capabilities

Solution:

• Verify server supports the transport type you are using
• Try alternative transport: switch between "http" and "sse"
• Check server documentation for supported transport types
• For SSE, ensure server sends proper Content-Type: text/event-stream
• For HTTP, verify server accepts POST requests with JSON payload

Adfin not appearing in mcp-use

Symptoms: Server not listed, Tools not available

Cause: Configuration or installation issue

Solution:

• Verify configuration syntax
• Check Adfin installation
• Restart mcp-use
• Check logs for error messages

Next Steps

Now that Adfin is integrated with mcp-use:

• Explore all Adfin capabilities through mcp-use
• Check out other MCP servers that work with mcp-use
• Join the MCP community for tips and support
• Consider contributing to Adfin development

Need Help?

• Search for Adfin documentation
• Check the mcp-use MCP guide
• Join the MCP community discussions