Finix MCP Server (Unofficial)

An unofficial, local MCP (Model Context Protocol) server that provides simplified access to Finix payment processing functionality.

⚠️ This is an unofficial, community-built MCP server. It is not affiliated with or endorsed by Finix.

Features

• Documentation Search: Search Finix documentation through an MCP-compatible interface

• Identity Management: Create and list buyers and sellers with simplified parameters

• Payment Links: Create payment links with just merchant ID, price, and quantity

• Streamlined API: All tools use simple parameters for ease of use and reduced token usage

Related MCP server: PayPal MCP Server

Installation

Configuration

Set your Finix credentials and environment:

Environment options:

• Sandbox (default) - Uses https://finix.sandbox-payments-api.com

• Live or Production - Uses https://finix.live-payments-api.com

Usage

Running the Server

Start the MCP server:

For development with auto-reload:

Build TypeScript

Integrating with Claude Code

Add this configuration to your Claude Code mcp file:

Available Tools

search_finix_docs

Search the Finix documentation for relevant information.

Parameters:

• query (string, required): The search query to find relevant Finix documentation

• limit (number, optional): Maximum number of results to return (default: 10)

• category (string, optional): Filter by document category ("api", "docs", or "all")

create_buyer

Create a new buyer identity with essential information.

Parameters:

• email (string, required): The email address of the buyer

• first_name (string, required): The first name

• last_name (string, required): The last name

• phone (string, required): The phone number

Returns: {id: "buyer_id"}

create_seller

Create a new seller identity with comprehensive business information.

Parameters:

• Multiple required fields including email, business details, and underwriting information

• See tool schema for complete parameter list

Returns: Full seller object with all details

list_buyers

Fetch a list of buyers with simple filtering.

Parameters:

• limit (number, optional): Number of buyers to return (1-100)

• email (string, optional): Filter by email address

Returns: [{id: "buyer_id"}, ...]

list_sellers

Fetch a list of sellers with simple filtering.

Parameters:

• limit (number, optional): Number of sellers to return (1-100)

• email (string, optional): Filter by email address

Returns: [{id: "seller_id"}, ...]

create_payment_link

Create a payment link for processing payments.

Parameters:

• merchant_id (string, required): The ID of the merchant

• price (number, required): The unit price in cents

• quantity (number, required): The quantity of the product

Returns: {id: "payment_link_id", url: "https://..."}

Development

The server is built with:

• TypeScript for type safety

• @modelcontextprotocol/sdk for MCP implementation

• Native fetch API for HTTP requests

• StdioServerTransport for communication

License

ISC