Mcpfusion

MCP Fusion is an open source framework from Vinkius for building MCP servers, called Connectors, that AI agents use to reach business systems and data. It is licensed under Apache 2.0. A developer writes a server, tests it locally, then deploys it to the Vinkius catalog with a single command, and Vinkius handles hosting and distribution. The framework centers on controlling what a model can see and do. A schema based egress layer strips any database field that has not been explicitly declared before it reaches the language model. A state machine integration built on XState hides tools from the protocol listing until the workflow reaches a state where they are valid. It also includes multi agent routing with signed delegation tokens, compiled redaction of personal data aimed at GDPR and HIPAA needs, and a lockfile that fingerprints the behavior of each tool so changes can be reviewed in pull requests. It suits developers who want agents to work against internal systems such as ERPs or databases with governance built in. Hosting on the Vinkius platform is sold in monthly plans priced in USD. Lite is $9 per month for 5,000 calls, Starter is $29 for 25,000 calls and adds hosting of custom Connectors and MCP Fusion deployment, Pro is $89 for 100,000 calls, and Business is $199 for 500,000 calls. Usage above the allowance is billed at $5 per 10,000 requests and connections stay active.