Polymarket

Polymarket — Sports Prediction Markets

Before writing queries, consult references/api-reference.md for sport codes, command parameters, and price format.

Quick Start

Prefer the CLI — it avoids Python import path issues:

sports-skills polymarket search_markets --sport=nba --sports_market_types=moneyline
sports-skills polymarket get_todays_events --sport=epl
sports-skills polymarket search_markets --sport=epl --query="Leeds" --sports_market_types=moneyline
sports-skills polymarket get_sports_config

Python SDK (alternative):

from sports_skills import polymarket

polymarket.search_markets(sport='nba', sports_market_types='moneyline')
polymarket.get_todays_events(sport='epl')
polymarket.search_markets(sport='epl', query='Leeds')
polymarket.get_sports_config()

CRITICAL: Before Any Query

CRITICAL: Before calling any market endpoint, verify:

• The sport parameter is always passed to search_markets and get_todays_events for single-game markets.
• Prices are probabilities on a 0-1 scale (0.65 = 65%) — no conversion needed.
• For price/orderbook endpoints, use token_id (CLOB), not market_id (Gamma). Call get_market_details first to get clobTokenIds.

Without the sport parameter:

WRONG: search_markets(query="Leeds")           → 0 results
RIGHT: search_markets(sport='epl', query='Leeds') → returns all Leeds markets

Prerequisites

Core commands (no dependencies, no API keys): All read commands work out of the box.

Trading commands require py-clob-client-v2:

pip install sports-skills[polymarket]

Additionally requires a configured wallet:

export POLYMARKET_PRIVATE_KEY=0x...
# Only for proxy / email (Magic) wallets, where the signer differs from the
# funds holder. EOA wallets don't need it.
export POLYMARKET_FUNDER_ADDRESS=0x...

Workflows

Find Single-Game Markets for a Sport

1. search_markets --sport=nba (or epl, nfl, bun, etc.)
2. Each market includes outcomes with prices (price = probability).
3. For detailed prices, use get_market_prices --token_id=.

Today's Events for a League

1. get_todays_events --sport=epl — returns events sorted by start date.
2. Each event includes nested markets (moneyline, spreads, totals, props).
3. Pick a market, get clob_token_id from outcomes, then get_market_prices.

Live Odds Check

1. search_markets --sport=nba --query="Lakers" --sports_market_types=moneyline
2. get_market_prices --token_id= for live CLOB prices.
3. Present probabilities.

Price Trend Analysis

1. Find market via search_markets --sport=nba.
2. Get clob_token_id from the outcomes.
3. get_price_history --token_id= --interval=1w
4. Present price movement.

Commands

| Command | Description | |---|---| | get_sports_config | Available sport codes | | get_todays_events | Today's events for a league | | search_markets | Find markets by sport, keyword, and type | | get_sports_markets | Browse all sports markets | | get_sports_events | Browse sports events | | get_series | List series (leagues) | | get_market_details | Single market details | | get_event_details | Single event details | | get_market_prices | Current CLOB prices | | get_order_book | Full order book | | get_price_history | Historical prices | | get_last_trade_price | Most recent trade |

See references/api-reference.md for full parameter lists and return shapes.

Examples

Example 1: Tonight's NBA favorites User says: "Who's favored in tonight's NBA games?" Actions:

1. Call search_markets(sport='nba', sports_market_types='moneyline')

Result: Each matchup with implied win probabilities (price = probability)

Example 2: Team-specific odds User says: "Show me Leeds vs Man City odds" Actions:

1. Call search_markets(sport='epl', query='Leeds', sports_market_types='moneyline')

Result: Leeds moneyline market with outcome prices

Example 3: Today's EPL events User says: "What EPL matches are on today?" Actions:

1. Call get_todays_events(sport='epl')

Result: Today's EPL events with nested markets (moneyline, spreads, totals, props)

Example 4: League winner futures User says: "Who will win the Premier League?" Actions:

1. Call search_markets(query='Premier League') — returns futures
2. Sort results by Yes outcome price descending

Result: Top contenders ranked by win probability

Example 5: Bundesliga odds User says: "Show me Bundesliga odds for Dortmund vs Bayern" Actions:

1. Call search_markets(sport='bun', query='Dortmund', sports_market_types='moneyline')

Result: Dortmund/Bayern moneyline market with outcome prices

Commands that DO NOT exist — never call these

• ~~cli_search_markets~~ — does not exist. Use search_markets instead.
• ~~cli_sports_list~~ — does not exist. Use get_sports_config instead.
• ~~get_market_odds~~ / ~~get_odds~~ / ~~get_current_odds~~ — prices ARE probabilities. Use get_market_prices(token_id=...).
• ~~get_implied_probability~~ — the price IS the implied probability.
• ~~get_markets~~ — use get_sports_markets (browse) or search_markets (search).
• ~~get_team_schedule~~ — this is a football-data command, not polymarket.

If a command is not listed in references/api-reference.md, it does not exist.

Troubleshooting

Error: search_markets returns 0 results Cause: The sport parameter is missing — without it, search only checks high-volume markets and misses single-game events Solution: Always pass sport='' to search_markets. Check references/api-reference.md for valid sport codes

Error: get_market_prices fails or returns wrong data Cause: market_id (Gamma) was used instead of token_id (CLOB) Solution: Call get_market_details(market_id=) first to get the CLOB clobTokenIds, then use those with get_market_prices

Error: Prices seem stale or unchanged Cause: Low-liquidity market — may have wide spreads and infrequent trades Solution: Check get_last_trade_price(token_id=) for the most recent actual trade price

Error: Trading commands fail Cause: py-clob-client-v2 is not installed or wallet is not configured Solution: Run pip install sports-skills[polymarket] and set POLYMARKET_PRIVATE_KEY environment variable

Source & license

This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.

• Author: machina-sports
• Source: machina-sports/sports-skills
• License: MIT
• Homepage: https://sports-skills.sh

Install and usage instructions live in the source repository linked above.