Chai MCP Server

Chai MCP server exists for a simple reason — assistants are far more useful when they can act on Chai directly instead of describing what you should do. BDD/TDD assertion library for node.js and the browser. Test framework agnostic.

What you get

Chai is a BDD / TDD assertion library for node and the browser that can be delightfully paired with any javascript testing framework.

Chai is an assertion library, similar to Node's built-in assert. It makes testing much easier by giving you lots of assertions you can run against your code.

What the assistant can call

Once Chai is connected, these are the calls the assistant has available:

• Browsers — You can also use it within the browser; install via npm and use the index.js file found within the download. For example:
• Contributing — Here are a few issues other contributors frequently ran into when opening pull requests:
• Contributors — Please see the full Contributors Graph for our list of contributors

Setting it up

Setup follows the usual MCP pattern — install or clone the server, register it in your client's configuration file, restart the client.

Choosing this one

This sits in the browser automation group, where several servers overlap in what they claim to do but differ sharply once you actually set them up. Chai's toolset — Browsers, Contributing, Contributors — is a fair guide to whether it matches your workflow. It is maintained by GitHub Actions; worth a glance at recent repository activity before you build anything load-bearing on it.

This entry was verified against Chai's own documentation before publication; SyncDev keeps the directory reviewed rather than auto-generated.

Before you rely on it

• It runs with your machine's permissions. That is convenient and also the reason to think about what you point it at before you approve a tool call.
• MCP clients confirm each tool call by default. Leave that on until you have watched what the chai mcp server does with a few real requests.