The first PSP in Japan, "fincode byGMO" supports MCP, becoming the optimal payment platform in the AI era
~Utilizing AI agents, payment can be embedded and used~

GMO Payment Gateway, Inc. (TSE Prime Market: Securities Code: 3769, President & Chief Executive Officer: Issei Ainoura hereinafter referred to as "GMO-PG"), which provides comprehensive payment-related services and finance-related services in the GMO Internet Group, is the first payment service provider (PSP) in Japan ^{(* 1)} We are pleased to announce that the online infrastructure of payments "fincode by GMO" provided by the consolidated company's GMO Epsilon, Inc. (President & Chief Executive Officer: Tomoyuki Murakami) for successful startups is now compatible with "MCP (Model Context Protocol)".
As a result, "fincode byGMO" will be able to work with AI agents, and will be able to implement and operate payment functions through natural dialogue with AI. First, we will start offering a developer evaluation version from June 19, 2025 (Thursday), and we are looking for companies and developers who can cooperate in validating the use of the system. If you are interested, please contact us at "Inquiries about the use of the developer evaluation version".

• *1 The first PSP to target the Japan market as its main service, according to GMO-PG research.

[Background and Purpose]

With the technological advancement of generative AI, the introduction of AI-based support tools is progressing in business and development sites. In the acquisition and manipulation of development information, the method of obtaining and utilizing development information while interacting with AI in natural language is becoming widespread, instead of the conventional method of manually manipulating document search and command parameters. In such an environment, a new development style in which AI agents grasp human words and intentions and mediate the development process and processing is attracting attention.
In the midst of this trend, GMO-PG has been developing a mechanism that can utilize payment functions through natural language dialogue with AI agents, and has become the first PSP in Japan to support MCP for "fincode byGMO". fincode byGMO" has always had a simple API design and a wealth of SDKs ^(*2) With a variety of payment method, we have supported the speedy, flexible, and intuitive implementation of growing companies. Starting with MCP support, we aim to position ourselves as the best payment platform for the AI agent era, and we will continue to enhance functions and collaborate with AI agent companies to meet the needs of the AI era.

• *2 Abbreviation for Software Development Kit. fincode byGMO provides a library that makes it easy to incorporate APIs.

[Overview of MCP support]

MCP is a common standard for AI agents to understand the specifications of external services and to generate and execute appropriate requests. In this MCP support, the following will be realized through dialogue with AI in the incorporation and use of "fincode byGMO".

1. Development Document Search

For example, if you enter "I want to implement recurring billing for the payment system" in AI, the MCP server will quickly search for "fincode byGMO" development documents including specifications and API references, and return the tool definition to the AI agent in JSON format. This allows developers to get technical information from the chat screen of the conversational AI agent they are using and start developing directly. In addition to minimizing the development burden on developers, it also leads to the realization of optimal and safe integration of "fincode byGMO" with various functions.

2. Redirect type payment URL creation

If you enter "Create a payment URL for 1,000 yen", the AI agent will execute the "fincode byGMO" API and immediately issue a redirect-type payment URL. Even non-engineers, such as corporate sales representatives and sole proprietors, can intuitively build payment functions through the flow of dialogue with the AI they use on a daily basis.

【About "fincode byGMO"】

"fincode byGMO" provided by GMO Epsilon, Inc., a consolidated company of GMO-PG, is an online infrastructure of payments that is close to the growth of startups. Not only does it solve the payment field challenges that arise before and after the launch of a new service, but it also seamlessly delivers the scaled value required as the business phase evolves.

[Future developments]

GMO-PG will contribute to the growth of companies and the development of a cashless society through the fusion of AI technology and infrastructure of payments. We will continue to strengthen our collaboration with AI-related companies in Japan and overseas, and plan to release additional functions and announce business alliances in due course. As the number one PSP in the AI-native era, we will continue to evolve and provide advanced value.