Olbrain Alchemist

Name: Olbrain Alchemist
Author: Olbrain

by Olbrainversion 0.9.11i★ –iRuns in the cloud

Registry namecom.olbrain/alchemist

Install

Overview

Description from the maker (original English)

Build, test and publish Olbrain AI agents from Claude Code, Codex, Antigravity, Cursor or Claude.ai.

PopNx MCP’s three pillars

These three are never merged into one score: opinions, measurements and popularity are different things.

User voiceiNo reviews yetReviews open together with accounts in a later step
Our basic checksi3 of 3 passedChecked from public information; code not scanned yet
UsageiNot measured yet★ –

What you can do with it

We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.

Connection: Runs in the cloud
Transport: Streamable HTTP
Category: Other

Install

Pick the AI app you use, then copy the settings.

Before you install

Basic checks: 3 of 3 passed
Runs on the maker’s server: what you ask it goes through their server.
The registry lists no key to fill in.

You need

Runs in the cloudNothing to install; it connects over the internet

Which app do you use?

ClaudeClaude CodeCursorVS CodeChatGPT

Pick your app above. We remember it, so next time the button says “Install in …”.

Works in Claude on the web, desktop and mobile:

Open Settings → Connectors
Press Add custom connector
Paste the address below and press Add
If it asks you to sign in, sign in with the maker

https://alchemist.olbrain.com/mcp/

Run this in your terminal

claude mcp add --transport http alchemist https://alchemist.olbrain.com/mcp/

Open in Cursor

Or copy the settings yourself

Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json

{
  "mcpServers": {
    "alchemist": {
      "url": "https://alchemist.olbrain.com/mcp/"
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

Open in VS Code

Or copy the settings yourself

Paste into .vscode/mcp.json in your project

{
  "servers": {
    "alchemist": {
      "type": "http",
      "url": "https://alchemist.olbrain.com/mcp/"
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

ChatGPT connects only to servers on the internet:

Open ChatGPT on the web → Settings → Connectors (Apps)
Press Create or Add (some plans need Developer mode under Advanced first)
Paste the address below, give it a name and save
If it asks you to sign in, sign in with the maker

https://alchemist.olbrain.com/mcp/

Menu names can differ slightly by plan and over time.

Your choice stays on this device in a cookie; no account needed.

These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.

What it can do

The server asks you to sign in before it lists its tools.

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 6, 2026

✓ Pass
Maker matches the repo
The registry name was verified against the domain olbrain.com (the registry checks domain ownership)
… 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
✓ Pass
Endpoint responds
Responded in 1602 ms (HTTP 401)
✓ Pass
Sign-in with OAuth
Declares OAuth sign-in, so your AI app can take you to log in
… Not checked yet
No hidden instructions in tool descriptions
Not checked yet; we read the tool list when we check the endpoint

Compared with others in Otheri

More stars than 0% of the other 32476 servers in this category
Published to the registry more recently than 94% of the other 32476 servers in this category
Basic checks equal to or better than 100% of the other 32476 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 Olbrain Alchemist safe?

It passed 3 of 3 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 (0.9.11) reached the registry 2 days 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 in developer mode.

What can I use instead?

In the same category: Spec Driven Development, Remote Desktop Commander, zanadir

Alternatives

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Reading a card:★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi

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Runs on your computer★ 440MITUpdated 14 months ago

Install

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Runs in the cloud★ 211Updated yesterday

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zanadir

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Find what a repository's CI is missing, and which security checks cannot fail the build.

Runs on your computerUpdated today

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README from the maker

Open the README

Copied from the maker’s repo as written. PopNx MCP has not reviewed or endorsed it. HTML, images and scripts are removed. Links lead off this site.

Alchemist

OLBRAIN · AGENT BUILDER

Build, test and publish Olbrain AI agents from Claude Code, Codex, Antigravity, Cursor, GitHub Copilot or claude.ai.

You describe the agent. Claude plans it with Alchemist's guidance; Alchemist builds it, tests it, checks every step — and asks you before anything goes live, unless you let Claude decide.

Install · How a build works · Capabilities · Tools · Privacy · Docs

What it is

Alchemist is Olbrain's agent builder, available as an MCP server and a Claude Code plugin. You tell Claude what the agent should do, in plain words. Claude (or Codex, Antigravity or Cursor) plans and designs the agent from your words and your project, with Alchemist's step-by-step guidance. Alchemist builds it in your Olbrain organisation, tests it on real inputs, checks each step in order, refusing one that is skipped, and publishes it.

Every agent it builds runs on Olbrain and stays visible in Noesis, Olbrain's console, where your team can open, review and change it.

Olbrain's own front door, built with Alchemist: one team of agents on WhatsApp and website chat.

Install

Claude Code

/plugin marketplace add Olbrain/alchemist-plugin

/plugin install alchemist@alchemist

Then run /mcp, pick alchemist and sign in with your Olbrain account. New to Olbrain? Choose Create account on the sign-in page.

Claude Code asks before every tool call. To stop it asking each time Claude checks on a build, allow these five tools once under /permissions (they read; alchemist_state also marks the build's news as seen, and Claude shows it to you): mcp__plugin_alchemist_alchemist__whoami, mcp__plugin_alchemist_alchemist__alchemist_builds, mcp__plugin_alchemist_alchemist__alchemist_build, mcp__plugin_alchemist_alchemist__alchemist_capabilities and mcp__plugin_alchemist_alchemist__alchemist_state. Leave the rest asking, including alchemist_do and alchemist_answer: they take build steps, answer cards or change your organisation.

To see an agent drawn in a pane beside the chat, also install the canvas:

/plugin install alchemist-canvas@alchemist

It draws the agent whenever Claude shows it, and redraws it when a publish or make-live card arrives, with new, changed and removed parts marked. /agent-canvas opens the pane when the terminal is too narrow for it to open by itself. It needs a Claude Code build with plugin panes; older builds and Codex skip it.

Codex

codex mcp add alchemist --url https://alchemist.olbrain.com/mcp/

codex mcp login alchemist

Optional: copy plugins/alchemist/skills/alchemist to ~/.agents/skills/alchemist so Codex follows the same workflow as Claude, including when to continue a build and when to start a new one. Without it, the server's own instructions carry the same rule. A copied skill does not update itself: copy it again after each release (0.9.0 changes how builds run).

Antigravity

agy plugin install https://github.com/Olbrain/alchemist-plugin/tree/main/plugins/alchemist

Or in the Antigravity app: Customizations → Plugins → Install from URL with the same URL. This installs the Alchemist skills and connects the MCP server. Sign in with your Olbrain account when Antigravity asks; if it doesn't, open /plugin, expand alchemist under Installed and choose Sign in. The canvas is Claude Code only.

Cursor

Install Olbrain Alchemist from the Cursor plugin directory: cursor.directory/plugins/alchemist. Sign in with your Olbrain account when Cursor asks, or from the alchemist row in Customize. A team admin can also add this repository in Dashboard → Plugins & MCPs → Import from Repo (https://github.com/Olbrain/alchemist-plugin). The canvas is Claude Code only.

GitHub Copilot

copilot plugin marketplace add Olbrain/alchemist-plugin

copilot plugin install alchemist@alchemist

This installs the Alchemist skills and connects the MCP server in Copilot CLI. Ask Copilot to use Alchemist and sign in with your Olbrain account when the browser opens. The canvas is Claude Code only.

claude.ai and Claude Code on the web

Add a custom connector with the URL https://alchemist.olbrain.com/mcp/ (Customize → Connectors → Add custom connector; on Team and Enterprise plans an owner adds it under Organization settings → Connectors). Then click Connect and sign in.

How a build works

Stage	What happens	Your call
`01` Brief	Your coding agent drafts what you asked for (who the agent serves, what it does, what it must not do) from your words and your project; Alchemist checks it.	Approve or change it
`02` Plan	Your coding agent drafts the agents, steps, channels and tools; Alchemist checks it.	Approve or change it
`03` Build	Alchemist builds the agent, connects its tools and knowledge, and reviews the setup for gaps and contradictions.	Sign in to tools or add keys when a card asks
`04` Test	Your coding agent writes the tests; Alchemist checks them, runs them on the draft and grades them. A job gets a live run on a real input first.	Run the live test, or not yet
`05` Publish	The tested version is published, with a 30-day free trial for a new agent.	Publish, or not yet
`06` Go live	Embed code, API and SDK steps, or the channel it answers on.	You run the commands

Alchemist gives one stage at a time and refuses a step taken out of order. Builds started in Noesis, and plugin builds while Olbrain moves accounts over, are still planned by Alchemist's own model through the alchemist tool; the skill switches by itself.

On a build Claude plans, each agent has a budget: six passes per fix round, a stop after three passes in a row without a gain, four failed compiles and 120 draft test runs. When a build reaches one, Claude shows the best result so far and asks whether to continue (two more passes). A stronger model usually gets a build through its tests first time.

Before Alchemist publishes an agent, makes it live, merges agents or changes how one behaves, it stops with an approval card. You decide how many of these Claude answers for you: tell it in the chat, or put it in your CLAUDE.md, AGENTS.md or GEMINI.md, for example *"Approve plans and tests yourself; ask me before publishing."* If you haven't said, Claude answers every card itself in auto mode (Codex: running without approvals; Antigravity: set to proceed without asking) and asks you otherwise. It still asks for what only you can do, like sharing a Drive folder or a browser step. On a build Claude plans, removing an agent, forgetting a customer, renaming or moving an agent, changing a job's email address, and publishing despite failing tests are always answered in the browser, from the link Claude gives you. If Claude Code blocks an answer, answer the card on its build page, or allow the tool with /permissions: mcp__plugin_alchemist_alchemist__alchemist_answer when installed as the plugin, mcp__claude_ai_Alchemist__alchemist_answer when added as a claude.ai connector.

Use it

Ask in plain words: *"Use Alchemist to build an agent that answers questions about our pricing and hands refunds to a person."*
/alchemist:build starts a build.
/alchemist:status shows your account, organisation, builds and any cards waiting on you.
*"Pick up my support agent build"*: Claude finds your build by name and carries on. Builds are private to you; a teammate changes your published agent in a new build of their own. Anything waiting on you comes first, and Claude doesn't start a duplicate.
*"Put my support agent on my website"* or *"call my intake job when our signup form is sent"*: Claude adds the chat snippet, or a server route that calls the agent, to your project. It never puts your API key in browser code.
*"Show me my support agent"*: Claude draws it as a read-only diagram (example below).
*"What can Alchemist do?"* or *"Can it answer calls on our phone number?"*: Claude checks the live capability list before saying yes or no.
*"Where is my ticket TKT-…?"* or *"Raise a ticket: our webhook job didn't run"*: Alchemist handles your Olbrain support tickets in the same session.

A chat agent's diagram: where it hears from, what it checks, what it consults and how it ends.

Best practices

Also on docs.olbrain.com.

Say who it serves and where it stops. Name who the agent talks to, what it does, what it must never do and when it hands over to a person. Add a few questions real customers ask: they become its tests.

  Use Alchemist to build a chat agent for our website visitors. It answers pricing and

delivery questions from our FAQ, never promises discounts, and hands refunds to support@acme.com. Customers often ask: "Do you deliver on Sundays?" and "Can I change my order after paying?"

Build from your project. Start Claude Code or Codex in the folder that holds your docs, site or code. Your coding agent drafts the brief, plan and tests from it, and asks you only for what it can't find.
Decide which cards Claude answers. Put the rule in

Only the beginning is shown; read the rest in the repo

Olbrain Alchemist

Overview

PopNx MCP’s three pillars

What you can do with it

Install

Before you install

What it can do

Basic checksi

Maker matches the repo

Still maintained

Has a licence

Endpoint responds

Sign-in with OAuth

No hidden instructions in tool descriptions

Compared with others in Otheri

Common questions

Alternatives

Spec Driven Development

Remote Desktop Commander

zanadir

README from the maker

What it is

Install

Claude Code

Codex

Antigravity

Cursor

GitHub Copilot

claude.ai and Claude Code on the web

How a build works

Use it

Best practices