Gram: Open-Source platform to create, curate and host MCP servers (github.com)

Gram is an open-source platform designed to simplify the creation, curation, and hosting of MCP (Modular Control Protocol) servers, enabling developers to build powerful agent tools seamlessly from their own APIs. By hosting remote MCP servers under custom domains, Gram allows organizations to expose internal API context to large language models (LLMs), powering agentic workflows and chat features within products. Its unified control plane enhances management and security while supporting OAuth-based authorization and full compatibility with OpenAPI 3.0.x and 3.1.x specifications. Technically, Gram is lightweight and modular, allowing users to mix and match multiple APIs into flexible toolsets and create advanced, higher-order tools by chaining existing endpoints. Built with a modern stack—TypeScript for the dashboard, Golang for the backend with Goa framework, and Temporal for workflow orchestration—it integrates billing via Polar and LLM connectivity through OpenRouter. The platform’s emphasis on open-source collaboration encourages contributions and provides an easy local development setup through the zero script, which manages dependencies like Mise and Docker. For the AI/ML community, Gram offers a robust, extensible foundation for integrating internal data securely with LLMs, fostering innovation in agentic applications and workflow automation. Its adherence to MCP standards and support for rich API specifications make it a critical tool for organizations looking to build scalable, customizable AI-driven agents without reinventing core infrastructure.