REA
Reverse engineer anything from your terminal or agent with one CLI and MCP server.
Runs on your computer
Braintrust
What it does
AI evaluation and observability platform — query experiments, logs, datasets, and prompts.
- Connects Runs in the cloud
- Account or key No key needed
- Category Developer tools
Install
Pick the AI app you use, then copy the settings.
Passed 0/1 checks · What you ask goes through the maker’s server (api{region}.braintrust.dev)
First: which AI do you use?
Pick your app and the steps appear below.
Works with Claude, with some setup first
The address has {…} parts you must replace with your own first · Set it up once on claude.ai or the desktop app, then use it in chat · free accounts can add 1 · on Team/Enterprise an Owner adds it
Open Claude’s Connectors page
CustomizeConnectors
Click “+ Add” → “Add custom connector” and fill in these 2 fields
Copy each value into the field with the same name in Claude, then click Continue
Name · NameChecking the commands · copy buttons appear once they pass
Remote MCP server URL · AddressChecking the commands · copy buttons appear once they pass
Leave Authentication as Claude detected it, then click Add
Turn it on in a chat
+ConnectorsBraintrust
Try it
Use Braintrust and tell me what you can do for me, then show me one thing✓ If Claude says it is using Braintrust or shows a Braintrust tool in the answer, you are connected
Menu names checked against Anthropic’s help page on Nov 11, 2026 · your screen may differ slightly by app version
Works with ChatGPT, depending on your plan
Full MCP: ChatGPT Business, Enterprise or Edu on the web · Pro: connects with read/fetch permissions, so tools that change data may not work · Plus: not confirmed in OpenAI’s docs; if you see an add-custom-MCP option on the Plugins page you can try these steps · web only · The address has {…} parts you must replace with your own first
Open ChatGPT’s add-MCP page on the web
Plugins+Add custom MCP server
Fill in the name and address
Enter a name, paste the address under Connection, tick the risk warning and click Create as a plugin
Name · NameChecking the commands · copy buttons appear once they pass
Connection · AddressChecking the commands · copy buttons appear once they pass
Pick Braintrust in a chat
Start a new chat and pick Braintrust from your plugins before typing
Try it
Use Braintrust and tell me what you can do for me, then show me one thing✓ If ChatGPT says it is using Braintrust or shows a Braintrust tool in the answer, you are connected
Menu names checked against OpenAI’s help page on Nov 11, 2026 · your screen may differ slightly by app version
Works with Claude Code, with some setup first
The address has {…} parts you must replace with your own first
Open Terminal
Mac: press Command+Space and type Terminal · Windows: open PowerShell
Paste this command and press Enter
Checking the commands · copy buttons appear once they pass
Type /mcp in Claude Code
You should see Braintrust listed as connected
Try it
Use Braintrust and tell me what you can do for me, then show me one thing✓ If Claude Code says it is using Braintrust or shows a Braintrust tool in the answer, you are connected
Menu names checked against Anthropic’s help page on Nov 11, 2026 · your screen may differ slightly by app version
Works with Cursor, with some setup first
The address has {…} parts you must replace with your own first
Open Cursor’s MCP settings file
~/.cursor/mcp.json
Paste these settings, fill in the empty values and save
Checking the commands · copy buttons appear once they pass
Open the AI chat in Cursor in Agent mode
Try it
Use Braintrust and tell me what you can do for me, then show me one thing✓ If Cursor says it is using Braintrust or shows a Braintrust tool in the answer, you are connected
Menu names checked against Cursor’s help page on Nov 11, 2026 · your screen may differ slightly by app version
Works with VS Code, with some setup first
The address has {…} parts you must replace with your own first
Open VS Code’s MCP settings file
MCP: Open User Configuration
Paste these settings, fill in the empty values and save
Checking the commands · copy buttons appear once they pass
Open the AI chat in VS Code in Agent mode
Try it
Use Braintrust and tell me what you can do for me, then show me one thing✓ If VS Code says it is using Braintrust or shows a Braintrust tool in the answer, you are connected
Menu names checked against VS Code’s help page on Nov 11, 2026 · your screen may differ slightly by app version
Other apps that use MCP, such as Windsurf, Zed or Gemini CLI, each add servers differently. See how in the app list.
Address for apps that connect over the web
Address
Checking the commands · copy buttons appear once they pass
JSON settings are under “For developers” below
For developers: Terminal commands and JSON settings
Over the web
Claude Code
Checking the commands · copy buttons appear once they pass
Cursor (~/.cursor/mcp.json)
Checking the commands · copy buttons appear once they pass
VS Code (mcp.json)
Checking the commands · copy buttons appear once they pass
These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.
At a glance
Which apps can use it
Based on how this server connects and on each app’s own docs, checked Nov 10, 2026.
Connect over the internet in
ClaudeChatGPTGooseLM StudioMsty StudioCherry StudioCursorVS Code + GitHub CopilotVisual StudioWindsurf (Devin Desktop)ZedKiroClineContinueJetBrains AI AssistantClaude CodeCodex CLIGemini CLIOpenCodenodecodeWarpLibreChatOpen WebUIRaycast
Related guides
What it can do
The address needs your own values, so we cannot read the tool list for you.
Basic checksi
We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 13, 2026
- ! Caution
Maker matches the repo
The publisher (braintrustdata) is not the repo owner (braintrustdata); someone else may have listed it
- … Not checked yet
Still maintained
We have not read this repo from GitHub yet
- … Not checked yet
Has a licence
We have not read this repo from GitHub yet
- – Not applicable
Endpoint responds
The address needs your own account values, so we cannot check it for you
- – Not applicable
Sign-in with OAuth
The address needs your own account values, so we cannot check it for you
- … Not checked yet
No hidden instructions in tool descriptions
Not checked yet; we read the tool list when we check the endpoint
Discussion
Ask, share a tip or report that it does not work. Sorted by what people marked helpful.
No posts yet. Be the first to ask or share.
Posts here are written by users, not the PopNx team.
User reviews
No reviews yet
Compared with others in Developer toolsi
- More stars than 0% of the other 5825 servers in this category
- Published to the registry more recently than 10% of the other 5825 servers in this category
- Basic checks equal to or better than 4% of the other 5825 servers in this category
Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.
Common questions
Is Braintrust safe?
It passed 0 of 1 applicable basic checks. We have not read the code. Before adding a key or token, see what access the server asks for and use a key with only the permissions you need.
What keys or codes does it need?
The registry does not list a required key, though some servers ask you to sign in on first use.
Does it run on my computer or in the cloud?
It runs in the maker’s cloud. Connect over the internet with nothing to install, but what you send passes through the maker’s servers.
Is it still maintained?
The GitHub repo last changed –, and the latest version (1.0.0) reached the registry 7 months ago.
Which apps can use it?
Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. It connects by URL, so apps that accept remote MCP servers work too, such as ChatGPT on the web (full MCP on Business and above; Pro read-only).
Others in the same category
Servers in the same category from other makers, sorted by stars.
Reading a card:↓ Downloads per weeki★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi
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README from the maker
No README found in the repo