Polymarket Paper Trader MCP Server

A zero-risk gym for AI agents on real prediction markets - real order books, official fees, verified fill fidelity. Practice, evaluate, and benchmark decision intelligence. It runs locally over stdio via the published package.

People who work with algorithmic trading, backtesting and clawhub and want it reachable from Claude, Cursor, VS Code, or another MCP client. The project is written in Python.

VERIFIED ACTIVE

LAST COMMIT 2026-09-28 · ★ 401 · #4 OF 344 MAINTAINED FINANCE · VERIFIED 2026-09-30

MIT · Python servers · how we verify → /methodology

01 · Install Polymarket Paper Trader

Claude Code

claude mcp add agent-next-polymarket-paper-trader -- uvx polymarket-paper-trader

Claude Desktop / Cursor / VS Code - add to config

{
  "mcpServers": {
    "agent-next-polymarket-paper-trader": {
      "command": "uvx",
      "args": [
        "polymarket-paper-trader"
      ]
    }
  }
}

Same JSON for Cursor. For VS Code, rename the top-level key from `mcpServers` to `servers`.

Using another client? Same JSON, different key

Claude Desktop · mcpServers

Cursor · mcpServers

VS Code · servers

Windsurf · mcpServers

Zed · context_servers

Cline · mcpServers

Roo Code · mcpServers

Continue · mcpServers

LibreChat · mcpServers

Gemini CLI · mcpServers

Codex CLI · mcp_servers

Full setup guides: every client.

02 · Evidence

Security posture

What to check before giving this server access to your agent - from the registry, GitHub, and our own probes. We don't score safety; we show what's verifiable.

runs as local process (stdio) - runs on your machine with your user's permissions

license MIT - declared in the repository

pypi package polymarket-paper-trader - check the name against the project README before installing (PyPI has no namespace ownership)

registry namespace io.github.agent-next is GitHub-verified and matches the repo owner

03 · What Polymarket Paper Trader can do

Prose above is summarized from the project's README and registry record - no invented capabilities.

Latest releases

v0.4.2 · 2026-09-28

publish to the official MCP Registry via GitHub OIDC · Forecast Arena - daily AI-vs-crowd forecasting board · arena first-run fixes (GitHub Models retries, market selection) · replace retired GitHub Models entrants…

v0.4.1 · 2026-09-25

gate implement to collaborators, isolate public key (re-land #23) · bump the github-actions group across 1 directory with 6 updates · install in every agent runtime - Claude Code plugin, Gemini extension, integrations…

v0.4.0 · 2026-09-25

purpose-first rewrite with verified-fidelity story · committed project-state handoff in AGENTS.md · fold leaderboard-server into the monorepo · agent-native baseline for the four-package monorepo · migrate to MCP SDK…

04 · Who maintains Polymarket Paper Trader

Polymarket Paper Trader is maintained by agent-next. It's the only MCP server we track from this author; the repo dates to Mar 2026.

05 · Facts

repository: github.com/agent-next/polymarket-paper-trader
category: finance - ranked #4 of 344 actively-maintained finance servers as of 2026-09-30.
release cadence: 10+ releases in the last 90 days (latest 2026-09-28)
registry: io.github.agent-next/polymarket-paper-trader (active, first published 2026-09-26 · 2 versions)
packages: pypi:polymarket-paper-trader

06 · Polymarket Paper Trader FAQ

What is Polymarket Paper Trader?

Is Polymarket Paper Trader still maintained?

Yes - as of 2026-09-30, its last commit was 2026-09-28 and it shipped 10+ releases in the last 90 days. We re-verify nightly.

How do I install Polymarket Paper Trader?

Run `uvx polymarket-paper-trader`. You can also paste the ready-made client config above.

Does Polymarket Paper Trader run locally?

Yes - it's a stdio server: it runs on your machine (via uvx) with your user's permissions. Your data stays local unless the server itself calls external APIs.

07 · Alternatives to Polymarket Paper Trader

Alternatives to Polymarket Paper Trader

Maintained finance servers if Polymarket Paper Trader isn't the fit.

Pairs well with

Servers that cover what Polymarket Paper Trader doesn't - only shown when the pairing reason fits the companion.

More finance MCP servers · AgentBodega MCP · Agent Fund · Akshare · Kronos · True Source

More Python MCP servers · Agent Hotspot · A2db · Agentic HIL · Lore (agentkitai) · see all