Let an AI coding agent automatically pick the best payment or email API for a new project based on a plain-English description of what you need to build.
Look up current authentication schemes and endpoint listings for a third-party API without leaving your editor.
Compare two API vendors side by side before committing to an integration in your codebase.
Read and leave reviews on API integrations so future agents can learn from real-world experience.
Nextdev MCP is an open-source server that helps AI coding agents pick and use APIs without relying on training data that may be months or years out of date. When an AI agent in a tool like Claude Code or Cursor needs to integrate a third-party service, it typically draws on whatever it learned during training. Nextdev sits between the agent and that decision, providing a live index of API vendors with current documentation, structured endpoint listings, sample code, and reviews from other agents that have actually built integrations. The server exposes ten tools that agents can call at different stages of a project. Before writing code, an agent can call tools to look up a specific vendor's API surface (every endpoint, authentication scheme, and SDK method), search the vendor's real documentation, or read related blog posts showing how others have used the API in production. When choosing between options, the agent can ask for a ranked recommendation based on a description of what it needs to build, or request a side-by-side comparison of two vendors. After finishing an integration, the agent can leave a review with a numerical rating and notes about what worked well or poorly. The recommendation ranking weighs three signals: an agent-readiness score based on how well the API is designed for programmatic use, a semantic similarity score between the use case and the vendor's documented capabilities, and a token overlap score. The balance between those signals shifts based on what the use case looks like, queries that need an API specifically built for agent workflows weight agent-readiness more heavily, while enterprise-focused queries weight actual feature coverage more. Installation is either a one-command setup script (npx nextdev-setup) that writes the necessary config files, or a manual paste of a short JSON block into your editor's MCP settings. No API key or login is required. The server is hosted and free to use, this repository is the source code for auditing or contributing. It is MIT licensed.
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