Summon is an open-source platform that streamlines the process of making APIs accessible to AI clients and agents. Summon enables teams to generate, test, debug, and deploy MCP servers and A2A agents, allowing APIs to connect instantly with AI services like ChatGPT, Copilot, Claude, and Gemini. The platform is often described as an open-source Postman for MCP servers, focusing on simplifying API integration for AI-powered applications.
Summon's core value lies in automating and optimizing the lifecycle of API accessibility for AI agents. By offering tools to generate, test, and debug both MCP servers and agent-to-agent (A2A) integrations, Summon addresses the friction typically associated with making APIs usable by advanced AI models and platforms. This approach helps teams accelerate integration efforts and keep their APIs up-to-date for the rapidly evolving AI ecosystem.
Who Uses Summon?
Summon is particularly relevant for organizations and development teams aiming to connect their APIs with leading AI clients. Notable users and supported AI platforms include:
- ChatGPT
- Cursor
- Claude
- Gemini
These integrations illustrate Summon's focus on enabling API access for widely-used AI assistants and agents.
How Was Summon Started?
Summon was founded by Alexandre Berriche and Willy Douhard. Alexandre serves as Founder & Executive Chairman at Fleet and is also an investor, while Willy Douhard is the Co-founder & CTO (YC S25). Their combined expertise in technology, product, and API infrastructure underpins Summon's development as an open, developer-centric tool for AI integration.
What Makes Summon Different?
Summon's positioning as an open-source Postman for MCP servers sets it apart in the market. Its focus on end-to-end support—from API generation to deployment and continuous optimization—caters specifically to teams looking to make their APIs AI-accessible with minimal friction. The platform's open-source nature encourages transparency and community-driven improvements, which is especially valuable in the fast-moving AI and API landscape.
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