# Quantum Companies MCP server

> Search a directory of quantum technology companies by text, place and category, plus affiliate quantum products.

- Listing: https://mcp.tc/i/quantum-companies
- Connect: use the server's own URL `https://quantumcompanies.fyi/mcp` (no sign-in); clients connect to it directly. The listing link is a page, not an MCP endpoint.
- Type: remote (Streamable HTTP)
- Auth: none
- Category: [Docs & Knowledge](https://mcp.tc/c/docs-knowledge)
- Vendor: quantumcompanies
- Homepage: <https://quantumcompanies.fyi/>

## About

Connects to the Quantum Companies directory, which lists companies building quantum computers, software, sensors, networks and components. You can search listings by text, country, region, city and category, open a single company record, and read counts and data sources. Results carry attribution and source license information.

It also exposes affiliate products with the price seen on a given date and an outbound buy link. The hosted streamable HTTP endpoint needs no sign-in or API key for the read tools. A service token in the Authorization header makes additional write tools appear, depending on its scopes.

## What it can do

- Search quantum companies by text, place and category
- Fetch one company record by slug
- List places and categories with counts
- Check dataset stats and source licenses
- Browse affiliate quantum products and prices

## Tools (11)

- `search_listings`: Search published quantum companies by text, place and category. (read-only)
- `get_listing`: Get one published quantum company by its slug. (read-only)
- `list_places`: List countries, regions and cities that have quantum companies. (read-only)
- `list_categories`: List categories with their quantum company counts. (read-only)
- `get_stats`: Get counts of companies, places and categories, and when data last changed. (read-only)
- `list_sources`: List data sources with the license and refresh of each. (read-only)
- `list_products`: List affiliate products with the price on the day checked, filterable by category. (read-only)
- `get_product`: Get one affiliate product by slug, with its page and outbound link. (read-only)
- `list_product_categories`: List product categories with their product counts. (read-only)
- `list_courses`: List the published academy courses with their level, length, pass mark and certificate validity. (read-only)
- `get_course`: Get one published academy course by its slug, with its objectives, lessons and FAQ. (read-only)

## Example prompts

- "Find quantum sensing companies in Boulder."
- "List the categories of quantum companies and how many each has."
- "Show details for the Forward Photonics listing."
- "Which affiliate quantum products are available, and at what price?"

## Install

### Claude Code

1. Run this in a terminal, in your project folder:

```bash
claude mcp add --transport http quantum-companies https://quantumcompanies.fyi/mcp
```

2. Start Claude Code and type `/mcp`. **quantum-companies** should show as connected.

Add `--scope user` to make it available in every project, not just this one.

### Claude Desktop

1. Open **Customize → Connectors**, click **+ Add**, then **Add custom connector**.

2. Name it **Quantum Companies** and paste this URL:

```url
https://quantumcompanies.fyi/mcp
```

3. Click **Add**. Its tools appear in the chat’s tools menu.

Claude Desktop’s JSON config file only starts local servers. Remote servers go through Connectors, and connectors you add on claude.ai show up here too.

### claude.ai

1. Open the connector form on claude.ai. This button fills in the name and URL for you:

[Add to claude.ai](<https://claude.ai/customize/connectors?modal=add-custom-connector&connectorName=Quantum%20Companies&connectorUrl=https%3A%2F%2Fquantumcompanies.fyi%2Fmcp>) (opens connector settings)

2. Check that the URL reads `https://quantumcompanies.fyi/mcp` and click **Add**.

3. Turn it on in a chat from the tools menu.

Free plans allow one custom connector. On Team and Enterprise plans an owner adds it under **Organization settings → Connectors**.

### ChatGPT

1. On chatgpt.com, go to **Plugins**, select **+**, then **Add custom MCP server**.

2. Enter a name for the server.

3. Under **Connection**, paste `https://quantumcompanies.fyi/mcp` as the server URL, then for authentication choose **No authentication**.

4. Check **I understand and want to continue**, then select **Create as a plugin**.

Whether you can add a custom MCP server depends on your ChatGPT plan and your workspace permissions (in Business workspaces, admins and owners can).

### Cursor

[Add to Cursor](<https://cursor.com/install-mcp?name=quantum-companies&config=eyJ1cmwiOiJodHRwczovL3F1YW50dW1jb21wYW5pZXMuZnlpL21jcCJ9>) (opens Cursor)

Or add it by hand to `~/.cursor/mcp.json` (all projects) or `.cursor/mcp.json` (this project):

`mcp.json`:

```json
{
  "mcpServers": {
    "quantum-companies": {
      "url": "https://quantumcompanies.fyi/mcp"
    }
  }
}
```

### VS Code

[Install in VS Code](<https://vscode.dev/redirect/mcp/install?name=quantum-companies&config=%7B%22type%22%3A%22http%22%2C%22url%22%3A%22https%3A%2F%2Fquantumcompanies.fyi%2Fmcp%22%7D>) (opens VS Code)

Or from a terminal:

```bash
code --add-mcp '{"name":"quantum-companies","type":"http","url":"https://quantumcompanies.fyi/mcp"}'
```

Or commit it to the repo in `.vscode/mcp.json`:

`.vscode/mcp.json`:

```json
{
  "servers": {
    "quantum-companies": {
      "type": "http",
      "url": "https://quantumcompanies.fyi/mcp"
    }
  }
}
```

### Devin Desktop

1. Add it to `~/.config/devin/mcp_config.json` (macOS and Linux) or `%APPDATA%\devin\mcp_config.json` (Windows):

`mcp_config.json`:

```json
{
  "mcpServers": {
    "quantum-companies": {
      "serverUrl": "https://quantumcompanies.fyi/mcp"
    }
  }
}
```

2. Refresh the MCP server list in Cascade.

Devin Desktop is the new name for Windsurf. It reads `serverUrl` (or `url`) for remote servers.

### Codex

```bash
codex mcp add quantum-companies --url https://quantumcompanies.fyi/mcp
```

Or edit `~/.codex/config.toml` directly:

`config.toml`:

```toml
[mcp_servers.quantum-companies]
url = "https://quantumcompanies.fyi/mcp"
```

### Gemini CLI

```bash
gemini mcp add --transport http quantum-companies https://quantumcompanies.fyi/mcp
```

This adds it to the current project. Add `-s user` to use it everywhere.

### Any client

Most clients accept this shape. Some name the URL field differently: `serverUrl` in Devin Desktop, `httpUrl` in Gemini CLI’s settings file.

```json
{
  "mcpServers": {
    "quantum-companies": {
      "type": "http",
      "url": "https://quantumcompanies.fyi/mcp"
    }
  }
}
```

Zed puts servers under `context_servers` in its settings. Cline needs `"type": "streamableHttp"`, or it assumes SSE.

Client only starts local servers? Bridge it with `npx -y mcp-remote https://quantumcompanies.fyi/mcp`.

## Recent changes

- 2026-11-12 08:47 UTC: Server instructions changed. Source: automatic check. Worth a look: new server instructions.
- 2026-11-11 20:57 UTC: 11 tools changed. Source: automatic check. Changed: get\_course, get\_listing, get\_product, get\_stats, list\_categories, list\_courses, list\_places, list\_product\_categories, list\_products, list\_sources, search\_listings.
- 2026-11-04 23:45 UTC: 2 tools added. Server instructions changed. Source: automatic check. Worth a look: new server instructions. Added: get\_course, list\_courses.
- 2026-11-03 20:27 UTC: Tracking started: 9 tools read. Source: automatic check.

More on the History tab, with descriptions before and after for the newest entries: https://mcp.tc/i/quantum-companies#history (Atom feed: https://mcp.tc/i/quantum-companies/history.xml). It records what mcp.tc's anonymous checks saw, every 3 hours where the tool list can be read without sign-in; it is not a security review.

## Details

- Server version: 1
- MCP protocol version: 2025-06-18
- Last checked: 2026-11-15 (reachable)
- Listed: 2026-11-03
- Updated: 2026-11-11

---
Source: https://mcp.tc/i/quantum-companies (mcp.tc is an independent directory, not affiliated with this server's publisher). Corrections: https://mcp.tc/report