PolymarketDocumentation/docs/quickstart/fetching-data.md

Documentation Index

Fetch the complete documentation index at: https://docs.polymarket.com/llms.txt Use this file to discover all available pages before exploring further.

Fetching Markets

Three strategies for discovering and querying markets

Both the events and markets endpoints are paginated. See [pagination](#pagination) for details.

There are three main strategies for retrieving market data, each optimized for different use cases:

1. By Slug — Best for fetching specific individual markets or events
2. By Tags — Ideal for filtering markets by category or sport
3. Via Events Endpoint — Most efficient for retrieving all active markets

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Fetch by Slug

Use case: When you need to retrieve a specific market or event that you already know about.

Individual markets and events are best fetched using their unique slug identifier. The slug can be found directly in the Polymarket frontend URL.

How to Extract the Slug

From any Polymarket URL, the slug is the path segment after /event/:

https://polymarket.com/event/fed-decision-in-october
                                ↑
                      Slug: fed-decision-in-october

Examples

# Fetch an event by slug (query parameter)
curl "https://gamma-api.polymarket.com/events?slug=fed-decision-in-october"

# Or use the path endpoint
curl "https://gamma-api.polymarket.com/events/slug/fed-decision-in-october"

# Fetch a market by slug (query parameter)
curl "https://gamma-api.polymarket.com/markets?slug=fed-decision-in-october"

# Or use the path endpoint
curl "https://gamma-api.polymarket.com/markets/slug/fed-decision-in-october"

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Fetch by Tags

Use case: When you want to filter markets by category, sport, or topic.

Tags provide a way to categorize and filter markets. You can discover available tags and then use them to filter your requests.

Discover Available Tags

General tags: GET /tags (Gamma API)

Sports tags and metadata: GET /sports (Gamma API)

The /sports endpoint returns metadata for sports including tag IDs, images, resolution sources, and series information.

Filter by Tag

Once you have tag IDs, use the tag_id parameter in both events and markets endpoints:

# Fetch events for a specific tag
curl "https://gamma-api.polymarket.com/events?tag_id=100381&limit=10&active=true&closed=false"

Additional Tag Filtering

You can also:

• Use related_tags=true to include related tag markets
• Exclude specific tags with exclude_tag_id

# Include related tags
curl "https://gamma-api.polymarket.com/events?tag_id=100381&related_tags=true&active=true&closed=false"

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Fetch All Active Markets

Use case: When you need to retrieve all available active markets, typically for broader analysis or market discovery.

The most efficient approach is to use the events endpoint with active=true&closed=false, as events contain their associated markets.

curl "https://gamma-api.polymarket.com/events?active=true&closed=false&limit=100"

Key Parameters

Parameter	Description
order	Field to order by (volume_24hr, volume, liquidity, start_date, end_date, competitive, closed_time)
ascending	Sort direction (true for ascending, false for descending). Default: false
active	Filter by active status (true for live tradable events)
closed	Filter by closed status
limit	Results per page
offset	Number of results to skip for pagination

# Get the highest volume active events
curl "https://gamma-api.polymarket.com/events?active=true&closed=false&order=volume_24hr&ascending=false&limit=100"

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Pagination

All list endpoints return paginated responses with limit and offset parameters:

# Page 1: First 50 results
curl "https://gamma-api.polymarket.com/events?active=true&closed=false&limit=50&offset=0"

# Page 2: Next 50 results
curl "https://gamma-api.polymarket.com/events?active=true&closed=false&limit=50&offset=50"

# Page 3: Next 50 results
curl "https://gamma-api.polymarket.com/events?active=true&closed=false&limit=50&offset=100"

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Best Practices

1. For individual markets: Use the slug method for direct lookups
2. For category browsing: Use tag filtering to reduce API calls
3. For complete market discovery: Use the events endpoint with pagination
4. Always include active=true&closed=false unless you specifically need historical data
5. Use the events endpoint and work backwards — events contain their associated markets, reducing the number of API calls needed

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Next Steps

Full endpoint documentation with parameters and response schemas.

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