# three.ws Marketplace

Lets an AI agent search the public three.ws catalog: agents and skills, paged and filtered. Read-only, so nothing gets published.

- MCP server · `type=mcp` · Claude Code, Codex, Cursor, GitHub Copilot, Windsurf (Devin Desktop), Cline, Zed, Gemini CLI · ★ 249
- Author: nirholas
- License: Apache-2.0 · policy=link-only · description only; the file stays with the author
- Source: https://github.com/nirholas/three.ws/tree/HEAD/packages/marketplace-mcp
- Updated: 2026-10-24
- HTML: https://affpapa.org/en/nevibecode/mcp/threews-marketplace

## What it does

The server runs over stdio and talks to the public `/api/marketplace` and `/api/skills` endpoints on `https://three.ws`. No API key, no signer, no payment: every tool only reads. Publishing agents and skills happens through a separate authenticated path on the HTTP API.

Five tools. `browse_agents` searches agents with category and query filters, a sort order and cursor paging. `agent_detail` pulls one agent by UUID, including its system prompt, capabilities, author, ratings and skill prices. `agent_categories` lists categories with counts. The skills side has `browse_skills` and `skill_categories`. A search returns items plus a `next_cursor`; send it back as `cursor` for the next page.

You need Node.js 20 or later and network access to `https://three.ws`. `THREE_WS_BASE` points the server at a different host, `THREE_WS_TIMEOUT_MS` sets the request timeout. On an older Node the server won't start, so check the version first.

## Requirements
- Needs: Node.js (commands run via npx)
- Environment variables: `THREE_WS_BASE`, `THREE_WS_TIMEOUT_MS` — keys and tokens: ask the human for the values, never commit them or put them in shared files.

## Install

### Claude Code (native platform)

**Platform CLI**
```bash
claude mcp add --env THREE_WS_BASE=<THREE_WS_BASE> --env THREE_WS_TIMEOUT_MS=<THREE_WS_TIMEOUT_MS> --transport stdio marketplace-mcp -- npx -y @three-ws/marketplace-mcp
```
Replace <…> with your own values

### Codex

**Platform CLI**
```bash
codex mcp add marketplace-mcp --env THREE_WS_BASE=<THREE_WS_BASE> --env THREE_WS_TIMEOUT_MS=<THREE_WS_TIMEOUT_MS> -- npx -y @three-ws/marketplace-mcp
```
Replace <…> with your own values

### Cursor

**Config file**
File `.cursor/mcp.json`:
```json
{
    "mcpServers": {
        "marketplace-mcp": {
            "command": "npx",
            "args": [
                "-y",
                "@three-ws/marketplace-mcp"
            ],
            "env": {
                "THREE_WS_BASE": "<THREE_WS_BASE>",
                "THREE_WS_TIMEOUT_MS": "<THREE_WS_TIMEOUT_MS>"
            }
        }
    }
}
```
Replace <…> with your own values

### GitHub Copilot

**Config file**
File `.vscode/mcp.json`:
```json
{
    "servers": {
        "marketplace-mcp": {
            "type": "stdio",
            "command": "npx",
            "args": [
                "-y",
                "@three-ws/marketplace-mcp"
            ],
            "env": {
                "THREE_WS_BASE": "<THREE_WS_BASE>",
                "THREE_WS_TIMEOUT_MS": "<THREE_WS_TIMEOUT_MS>"
            }
        }
    }
}
```
Replace <…> with your own values

### Gemini CLI

**Platform CLI**
```bash
gemini mcp add -e THREE_WS_BASE=<THREE_WS_BASE> -e THREE_WS_TIMEOUT_MS=<THREE_WS_TIMEOUT_MS> marketplace-mcp npx -y @three-ws/marketplace-mcp
```
Replace <…> with your own values

## When to use it
- find an agent that fits a task by searching the catalog
- inspect an agent's system prompt and skill prices by UUID
- see how many published agents each category holds
- page through the skills catalog with a sort order
- pick skills by category and query text

## Example prompts
- Search the three.ws marketplace for code review agents, sort by top rated, show the first three.
- Open the agent card for id `a1b2c3d4-…` from those results.
- List the skill categories and how many skills each one has.

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From the same set: [nirholas/three.ws](https://affpapa.org/en/nevibecode/by/nirholas/three.ws.md) — 29 cards

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