MCP server PMWallets

pmwallets — Node.js SDK for PMWallets

Official Node.js / TypeScript client for PMWallets: the Polymarket smart-money leaderboard computed from the Polygon chain, and the real-time fills of the Polymarket wallets you follow — delivered in order, exactly once, with every gap replayed.

中文说明 · Python SDK: pmwallets-python · Ready-to-run copy-trading bot built on it: polymarket-copy-trading-bot

Install

npm install pmwallets     # Node.js ≥ 20

Create an API key on pmwallets.com/keys.

Signals and radar (Pro and Max)

const { entries } = await pmw.signals({ category: 'sports' });
const big = await pmw.radar({ minUsd: 25000, smart: true });
await pmw.saveSignalRule('signal', { enabled: true, scope: 'official', minWallets: 3, windowMin: 30, minUsd: 5000, channels: ['ws', 'webhook'] });

For live alerts use new SignalStream({ client: pmw, onAlert: (a) => … }).start(), or pmwallets alerts on the command line. Amounts keep two significant figures, times the minute, and traders are named by handle.

Usage

import { PmwClient, FillStream, FileStateStore, verifyWebhook } from 'pmwallets';

const pmw = new PmwClient({ apiKey: process.env.PMW_API_KEY! });

// who is making money on Polymarket, and how
const board = await pmw.leaderboard({ minWinLo: 0.55, minEligible: 30, style: 'taker', status: 'active', limit: 50 });
// only wallets whose address unlocks for free or for the $1 band (0 = free … 5; the ladder is board.pricing.bands)
const cheap = await pmw.leaderboard({ bands: [0, 1], minWinLo: 0.55 });

// follow one (billed per entity per hour; 402 = balance too low, 409 = dormant)
await pmw.subscribe({ entityId: board.rows[0].entityId, channels: ['ws'] });

// every fill of every entity you follow
const stream = new FillStream({
  client: pmw,
  store: new FileStateStore('./stream.json'),    // a restart resumes exactly where it stopped
  onFill: async (fill, { source }) => console.log(source, fill.side, fill.price, fill.tokenId),
  onEvent: (e) => e.type === 'fatal' && console.error(e.error.message),   // e.g. another bot already holds the stream
  // takeover: true,   // replace whichever API client holds this account's stream (it stops with `replaced`)
});
await stream.start();

What is in it

PmwClient	leaderboard, entities, address unlocks (balance or plan), your unlocked addresses (myAddresses), plans (quote, buyPlan from the balance) and balance, invites, subscriptions, webhook status and deliveries, fills replay (fills, fillsSince), trade-history exports
FillStream	WebSocket with reconnect and keep-alive; detects missed frames by session/seq and replays them from the last fill delivered; de-duplicates by eventId; anchors behind the chain head on first start; persisted cursor
verifyWebhook(rawBody, signature, secret)	checks x-pmw-signature (HMAC-SHA256 of the raw body)

One stream per account:

• An API-key connection takes priority over the pmwallets.com feed page (the page never takes the stream from it).
• Between two API connections the first one keeps the stream. A second one — another key of the same account, or the same bot started twice — is refused: blocked, then fatal, and the stream stops. Pass takeover: true to replace the holder instead; the holder gets replaced, then fatal, and stops (it does not fight back).
• A FillStream identifies itself with a random clientId, so its own reconnects after a network drop replace its own dead connection without needing takeover.
• When the server restarts it closes the socket with 1012; the stream reconnects at once (event restarting) and replays anything it missed. HTTPS_PROXY: pass wsOptions: { agent } for the WebSocket and set a global fetch dispatcher.

PMWallets' servers are in the United Kingdom. A consumer that also trades on Polymarket should run from Ireland (AWS eu-west-1): Polymarket does not accept API orders from the UK, the US and several EU countries.

AI agents: command line and MCP

The package installs a pmwallets command that prints JSON — for scripts, and for AI agents (Claude Code, Codex, Gemini CLI, Cursor, WorkBuddy, …) that act on the fills of the traders you follow.

export PMW_API_KEY=pmw_…
npx pmwallets leaderboard --minWinLo 0.55 --category politics --limit 20
npx pmwallets subscribe <handle>          # billed per hour
npx pmwallets new-fills                   # fills since the previous call, each once (poll it)
npx pmwallets watch                       # live: one JSON line per fill, with its market and decimal amounts
npx pmwallets watch --batch-sec 30 --exec 'claude -p "Fills from traders I follow are on stdin. …"'
npx pmwallets mcp                         # the same as MCP tools
npx pmwallets skill                       # the guide to give your agent (SKILL.md)

• watch --exec runs the command once per batch, the fills on its stdin as JSON lines (and in $PMW_BATCH_FILE); fills that arrive while it runs make the next batch. A batch is handed over at most once: one whose command fails, times out or is interrupted is kept in pmw-watch/failed/ and never re-run — the agent may already have placed an order. Restarts resume from where the stream stopped.
• To trade, give the agent pmwallets-copytrade: order buy <tokenId> --usdc 5 --key <eventId> (the same key never orders twice), market, balance, positions.
• Platforms without a shell (Dify, Coze, n8n, GPT Actions): import openapi.json.
• HTTPS_PROXY / NO_PROXY are honoured by the command line.

MCP config (Claude Desktop, Cursor, Windsurf, WorkBuddy, …):

{
  "mcpServers": {
    "pmwallets": {
      "command": "npx",
      "args": ["-y", "pmwallets", "mcp"],
      "env": { "PMW_API_KEY": "pmw_..." }
    }
  }
}

Trade-history exports

A purchase is access to files: one zstd-compressed CSV per wallet per UTC day, downloadable at once and again later.

const order = await client.createExport({ entityIds: ['0x…'], from: '2026-09-01', to: '2026-09-30' });
const { files } = await client.exportFiles(String(order.id));
for (const f of files) {
  const bytes = await client.downloadExportFile(f.wallet, f.day); // .csv.zst
}

exportFileUrl(wallet, day) returns the short-lived link instead; the API key is never sent to the storage host.

Resources

• Polymarket smart-money leaderboard — profitable Polymarket traders scored from the Polygon chain, with win-rate confidence intervals
• Polymarket copy trading guide — which wallets are worth following and how to get their fills in time
• How to learn from Polymarket smart money — reading a trader's record: confidence intervals, maker vs taker, market specialism
• PMWallets API documentation — WebSocket and webhook fill push, fills replay, trade-history exports
• Measured fill-push latency — block-to-push p50 / p95, published live
• Ways to follow Polymarket wallets, compared — official leaderboard, free trackers, SQL dashboards
• FAQ · 中文站

Guides

• PMWallets SDKs — Node.js and Python clients, side by side
• How to get a Polymarket wallet's trades in real time — polling the Data API, reading OrderFilled events on Polygon, or a pushed fill stream with replay
• Polymarket WebSocket API — what the market and user channels give you, and what they don't
• Polymarket trade alerts by webhook — verify the HMAC-SHA256 signature, answer fast, deduplicate on eventId
• How to export a Polymarket wallet's full trade history — past the Data API's 10,000-trade cap: every fill from the chain, one CSV per wallet per day
• Polymarket token IDs, condition IDs and slugs — how they connect
• How to calculate a Polymarket wallet's PnL — and why sites disagree
• Polymarket leaderboards by category — sports, crypto, politics, esports and more, ranked from on-chain PnL
• Busiest Polymarket markets — the 1,000 most-traded markets of the last 30 days and how their traders did
• All guides · llms.txt

License

MIT