pmarket-cli

Command line interface for Polymarket.

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Features

• List available markets with question filter (with SQLite caching)
• Buy tokens/shares
• Sell tokens/shares
• Set USDC allowance for all Polymarket exchange contracts
• Show order book for specific token
• Cancel all open orders
• Redeem winning positions from resolved markets
• Auto-generate API keys for Polymarket

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Installation

Requires Node.js 22.0.0 or higher

npm i pmarket-cli -g

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Prerequisites

⚠️ You MUST have USDC.e (Bridged USDC) in your wallet

This is the most common issue! Polymarket uses USDC.e (bridged USDC), NOT native USDC.

Token	Contract Address	Works with Polymarket?
USDC.e (Bridged)	0x2791Bca1f2de4661ED88A30C99A7a9449Aa84174	✅ YES
USDC (Native)	0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359	❌ NO

If you have native USDC, you need to swap it for USDC.e on a DEX like Uniswap or QuickSwap.

You also need a small amount of MATIC for gas fees on Polygon.

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Setup

Quick Start (3 steps)

1. Ensure you have USDC.e in your wallet (see Prerequisites above)

2. Initialize with your private key:

pmarket-cli -i YOUR_PRIVATE_KEY

How to export your MetaMask private key

3. Set USDC allowance for the exchange contracts:

pmarket-cli -a 500

This sets allowance for all three Polymarket contracts:

• CTFExchange (regular markets)
• NegRiskExchange (neg_risk markets)
• NegRiskAdapter (neg_risk markets)

That's it! The tool will:

• Validate your private key and show your wallet address
• Use a public Polygon RPC (https://polygon-rpc.com) by default
• Auto-generate and cache API credentials on first use

Optional: Custom RPC Provider

By default, pmarket-cli uses https://polygon-rpc.com. To use a different Polygon RPC provider, add rpcUrl to your config file (~/.pmarket-cli/config.json):

{
    "privateKey": "your-private-key",
    "rpcUrl": "https://polygon-bor-rpc.publicnode.com"
}

This is useful if the default RPC is slow, rate-limited, or unreliable in your region.

Optional: Generate API Keys Manually

If you want to see or regenerate your API keys:

pmarket-cli -k

The credentials are automatically saved to ~/.pmarket-cli/credentials.json.

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Usage

Refresh Cache

Fetch fresh market data and update the local cache:

pmarket-cli -r

List Markets

Search for markets matching a filter. Uses cached data (refreshes automatically if cache is expired).

pmarket-cli -l "Bitcoin"

Buy Tokens

pmarket-cli -b <token_id> <size> <price>

Example: Buy 60 shares at price $0.50:

pmarket-cli -b 12110463059584809904811790486163860991533989713640269122405796144537637099628 60 0.5

Sell Tokens

pmarket-cli -s <token_id> <size> <price>

Example: Sell 60 shares at price $0.50:

pmarket-cli -s 12110463059584809904811790486163860991533989713640269122405796144537637099628 60 0.5

Show Positions

Display your current token positions with P&L:

pmarket-cli -p

Set USDC Allowance

Allow Polymarket's exchange contracts to spend your USDC.e:

pmarket-cli -a 500

This sets allowance for three contracts (required for all market types):

• CTFExchange: 0x4bFb41d5B3570DeFd03C39a9A4D8dE6Bd8B8982E (regular markets)
• NegRiskExchange: 0xC5d563A36AE78145C45a50134d48A1215220f80a (neg_risk markets)
• NegRiskAdapter: 0xd91E80cF2E7be2e162c6513ceD06f1dD0dA35296 (neg_risk markets)

Note: The command includes delays between transactions to avoid public RPC rate limits.

Show Order Book

pmarket-cli -o <token_id>

Cancel All Orders

pmarket-cli -c

Redeem Winnings

Claim USDC.e from resolved markets where you hold winning positions:

pmarket-cli -w

This automatically:

• Finds all redeemable positions from resolved markets
• Redeems them via the appropriate contract (ConditionalTokens for standard markets, NegRiskAdapter for neg_risk markets)
• Returns USDC.e to your wallet

Get/Generate API Keys

pmarket-cli -k

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Usage Examples

List available markets with question filter

Command

pmarket-cli -l "Oscar"

Response

[
  {
    yes: {
      token_id: '32690616433410387308307813339600971589831744601462134742731346664328487681674',
      outcome: 'Yes',
      price: 0.645,
      winner: false
    },
    no: {
      token_id: '93520364131545158991271066783085167796254018656458248205265557269588037162187',
      outcome: 'No',
      price: 0.355,
      winner: false
    },
    question: "Will 'Sing Sing' be nominated for Oscar for Best Picture?"
  },
  ...
]

Found 14 market(s). Use -r flag to refresh cache.

Buy token order

Command

pmarket-cli -b 12110463059584809904811790486163860991533989713640269122405796144537637099628 60 0.5

Response

{
  errorMsg: '',
  orderID: '0x6f89228a046c2cda1beb604599bda10c6acab735e2d8fdd7208754575f88dae0',
  status: 'live',
  success: true
}

Sell token order

Command

pmarket-cli -s 12110463059584809904811790486163860991533989713640269122405796144537637099628 60 0.5

Response

{
  "success": true,
  "errorMsg": "",
  "orderID": "0x556d3864c64d851462b2f378f5e6dcec7d31ba1632dfe44bfdcaa3cc685b45cc",
  "status": "matched"
}

Show positions

Command

pmarket-cli -p

Response

Fetching positions for 0x1234...

┌─────────────────────────────────────────────────────────────────────────────────────────────────────────┐
│ CURRENT POSITIONS                                                                                       │
├──────────────────────────────────────────────────────────────┬────────┬──────────┬──────────┬──────────┬────────┤
│ Market                                                       │ Side   │ Size     │ Price    │ Value    │ P&L    │
├──────────────────────────────────────────────────────────────┼────────┼──────────┼──────────┼──────────┼────────┤
│ Will Bitcoin reach $100k by end of 2024?                     │ Yes    │   100.00 │    $0.65 │   $65.00 │ +$5.00 │
│ Will ETH flip BTC?                                           │ No     │    50.00 │    $0.80 │   $40.00 │ -$2.00 │
├──────────────────────────────────────────────────────────────┴────────┴──────────┴──────────┼──────────┼────────┤
│ TOTAL                                                                                       │  $105.00 │ +$3.00 │
└─────────────────────────────────────────────────────────────────────────────────────────────┴──────────┴────────┘

2 position(s) found.

Show order book for specific tokenId

Command

pmarket-cli -o 12110463059584809904811790486163860991533989713640269122405796144537637099628

Response

{
  market: '0x6f662d9d965d0b01d08ee284a58e1dd866296729801c0cdc6867459760bd33ab',
  asset_id: '12110463059584809904811790486163860991533989713640269122405796144537637099628',
  bids: [
    { price: '0.03', size: '100' },
    { price: '0.45', size: '200' },
    ...
  ],
  asks: [
    { price: '0.99', size: '1000' },
    { price: '0.97', size: '100' },
    ...
  ]
}

Redeem winning positions

Command

pmarket-cli -w

Response

Fetching redeemable positions for 0x1234...

Found 1 resolved market(s) with redeemable positions:

  Will Bitcoin reach $100k by end of 2024?
  Condition: 0xabc123...
  Shares: Yes: 100.00

Redeeming positions...

Redeeming: Will Bitcoin reach $100k by end of 2024?
  tx submitted: 0xdef456...
  Confirmed (standard market)

Redeemed 1/1 market(s). USDC.e has been returned to your wallet.

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Configuration Files

All configuration is stored in ~/.pmarket-cli/:

File	Purpose
config.json	Private key and settings (e.g. rpcUrl)
credentials.json	Auto-generated API credentials
cache.db	SQLite cache for market data

Note: Ensure you have at least 1GB of free disk space for the market cache.

Custom Config Directory

You can override the config directory using the PMARKET_CONFIG_DIR environment variable:

PMARKET_CONFIG_DIR=/path/to/custom/dir pmarket-cli -l "Bitcoin"

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Development

npm install
npm run build
npm test
node dist/main.js -l "Bitcoin"

Project Structure

src/
├── main.ts              # Entry point
├── program.ts           # CLI argument parsing
├── services/
│   ├── config.service.ts     # Configuration management
│   ├── polymarket.service.ts # Polymarket API interactions
│   ├── contract.service.ts   # Ethereum contract interactions
│   └── cache.service.ts      # SQLite caching
└── strategy/
    ├── context.ts            # Strategy pattern context
    ├── list-strategy.ts      # List markets command
    ├── buy-strategy.ts       # Buy command
    ├── sell-strategy.ts      # Sell command
    ├── redeem-strategy.ts    # Redeem winnings command
    └── ...

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Issues

Please use the Issue Tracker to report any issues or bugs.

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License

This project is licensed under the MIT License.