Toolc

Name: Toolc
Author: toolc-dev

by toolc-devversion 0.1.1i★ –iRuns on your computer

Registry namedev.toolc/toolc

Install

Overview

Description from the maker (original English)

Optimizing compiler for agent tools: many MCP servers or REST APIs in, one lean endpoint out.

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 checksi1 of 1 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 on your computer
Transport: stdio
Category: Other
You need to fill in: ANTHROPIC_API_KEY

Install

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

Before you install

Basic checks: 1 of 1 passed
Runs on your computer with your user’s permissions (files, network, apps).
You fill in yourself: ANTHROPIC_API_KEY

Values marked secret are keys to your account. Never share them or paste them into a chat.

You need

npmNode.js installed (for the npx command)

Which app do you use?

ClaudeClaude CodeCursorVS CodeChatGPT

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

Open Claude Desktop → Settings → Developer → Edit Config, and paste this into claude_desktop_config.json

{
  "mcpServers": {
    "toolc": {
      "command": "npx",
      "args": [
        "-y",
        "@toolc/cli",
        "serve"
      ],
      "env": {
        "ANTHROPIC_API_KEY": "your-value"
      }
    }
  }
}

Run this in your terminal

claude mcp add toolc --env ANTHROPIC_API_KEY=your-value -- npx -y @toolc/cli serve

Fill in the empty values before running it.

Open in Cursor

Or copy the settings yourself

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

{
  "mcpServers": {
    "toolc": {
      "command": "npx",
      "args": [
        "-y",
        "@toolc/cli",
        "serve"
      ],
      "env": {
        "ANTHROPIC_API_KEY": "your-value"
      }
    }
  }
}

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": {
    "toolc": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@toolc/cli",
        "serve"
      ],
      "env": {
        "ANTHROPIC_API_KEY": "your-value"
      }
    }
  }
}

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.

This one runs on your computer, and ChatGPT can only connect to servers on the internet. Pick another app.

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

Values you fill in

ANTHROPIC_API_KEY secret env
Enables the LLM-assisted compile passes (rewrite, consolidate). Without it, toolc serves a mirror of the original tool surface.

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

What it can do

Runs on your computer; the tool list appears in your AI app after you install it.

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 toolc.dev (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
– Not applicable
Endpoint responds
This one runs on your computer; there is no internet endpoint
– Not applicable
Sign-in with OAuth
Runs on your computer and uses local settings instead
… Not checked yet
No hidden instructions in tool descriptions
Runs on your computer; we can only read tool lists from internet endpoints

Compared with others in Otheri

More stars than 0% of the other 32398 servers in this category
Published to the registry more recently than 43% of the other 32398 servers in this category
Basic checks equal to or better than 100% of the other 32398 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 Toolc safe?

It passed 1 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?

You need to fill in: ANTHROPIC_API_KEY

Does it run on my computer or in the cloud?

It runs on your computer. Your AI app starts it when needed, and data does not pass through the maker’s servers (unless it calls an online service itself).

Is it still maintained?

The GitHub repo last changed –, and the latest version (0.1.1) reached the registry 2 months ago.

Which apps can use it?

Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. You also need Node.js on your computer.

What can I use instead?

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

Alternatives

Servers in the same category from other makers, sorted by stars.

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

Spec Driven Development

by formulahendry

MCP Server that facilitates spec-driven development workflows, not just Vibe Coding.

Runs on your computer★ 440MITUpdated 14 months ago

Install

Remote Desktop Commander

by desktop-commander

Remote Desktop Commander: use files, terminal and processes on your own computers from any AI app.

Runs in the cloud★ 211Updated yesterday

Install

AI Deprecations

by aideprecations.com

AI model shutdown dates, replacements, change feed and webhook alerts for 8 providers.

Runs in the cloudUpdated today

Install

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.

toolc

The optimizing compiler for agent tool surfaces. Point it at your MCP servers, or just a REST API's OpenAPI spec, or even a docs page, and get back one endpoint that serves a smaller, smarter tool surface: cheaper for every agent that connects, more accurate on every task, with every call logged.

Connecting N MCP servers dumps every tool definition into the model's context, degrades tool selection, and forces improvised multi-hop call chains. toolc compiles the federation instead:

Rewrite: LLM-optimized descriptions with sibling disambiguation
Consolidate: families of near-duplicate tools (search_x/find_x/get_x) merge into single facade tools with deterministic routing
Selection: the whole catalog compresses behind two meta-tools (search_tools/call_tool) when you want maximum context savings
Compaction: oversized results are summarized at serve time, preserving identifiers and sourcing details
Compose: REST APIs join the pool straight from an OpenAPI spec, or from a drafted spec synthesized from their documentation
Observe: every call logged with arguments and results; recurring errors cluster into recommended fixes

Benchmark

131 tools across 5 live servers, 30 tasks × 3 trials, judged answers (full grid · consolidation run):

condition	success	cost / completed task	tool-def context
raw (all 131 tools)	96.7%	$0.2631	~24,360 tok
compiled + consolidate	96.7%	$0.0411 (6.4× cheaper)	~845 tok
consolidate, no selection	100.0%	$0.1335	~14,506 tok

Consolidation dominates both ends of the frontier: the selection surface is the cost lever, consolidation lifts accuracy everywhere. Every pass is a config toggle; pick the tradeoff per deployment.

Quick start

git clone https://github.com/toolc-dev/toolc && cd toolc

pnpm install && pnpm -r test

describe your federation

cp toolc.config.example.jsonc toolc.config.jsonc

introspect it

node packages/cli/bin/toolc.mjs -c toolc.config.jsonc inspect

compile (set ANTHROPIC_API_KEY for the rewrite/consolidate passes)

node packages/cli/bin/toolc.mjs -c toolc.config.jsonc compile

serve the compiled surface over stdio (add to Claude as an MCP server)

node packages/cli/bin/toolc.mjs -c toolc.config.jsonc serve --mode compiled

A downstream can be an MCP server or a bare REST API:

"downstream": [ { "id": "gh", "transport": { "type": "http", "url": "https://api.githubcopilot.com/mcp/" } }, { "id": "nws", "transport": { "type": "openapi", "spec": "https://api.weather.gov/openapi.json" } } ] }

See SELF_HOSTING.md for Docker deployment.

Hosted

toolc.dev runs this same engine as a managed service: compiled HTTPS endpoints, a console with a playground and full-payload log explorer, docs-to-spec drafting, and error-driven fix recommendations.

Layout

packages/core: IR (Capability Graph), frontends (MCP, OpenAPI, docs synthesis), passes, emit
packages/gateway: runtime MCP server (mirror + compiled) with call logging and compaction
packages/cli: the toolc command
packages/harness: benchmark runner, grading, reports
packages/shared: config schema, errors

License

The engine (everything in this repository) is Apache-2.0, forever: anyone can compile and serve their own tool surfaces locally with the exact same compilation quality as the hosted product.

Toolc

Overview

PopNx MCP’s three pillars

What you can do with it

Install

Before you install

Values you fill in

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

AI Deprecations

README from the maker

toolc

Benchmark

Quick start

describe your federation

introspect it

compile (set ANTHROPIC_API_KEY for the rewrite/consolidate passes)

serve the compiled surface over stdio (add to Claude as an MCP server)

Hosted

Layout

License