# Polymarket Event Markets Scraper — official public API, no logi (`pappy-dev/polymarket-markets`) Actor

Live market data from Polymarket (the largest prediction market) via its official public Gamma API — no login, no API key. Query any event slug and get every market inside it: question, Yes/No prices, volume, liquidity, best bid/ask, open/close dates. No personal data.

- **URL**: https://apify.com/pappy-dev/polymarket-markets.md
- **Developed by:** [Backyard Tools](https://apify.com/pappy-dev) (community)
- **Categories:** Business, News
- **Stats:** 2 total users, 1 monthly users, 100.0% runs succeeded, 0 bookmarks
- **User rating**: No ratings yet

## Pricing

$1.00 / 1,000 market record scrapeds

This Actor is paid per event. You are not charged for the Apify platform usage, but only a fixed price for specific events.

Learn more: https://docs.apify.com/actors/running/actors-in-store.md#pay-per-event

## What's an Apify Actor?

Actors are web data automations that power AI and operations. They run on the Apify platform to scrape websites, process data, connect APIs, and automate workflows.
In Batch mode, an Actor accepts a well-defined JSON input, performs an action which can take anything from a few seconds to a few hours,
and optionally produces a well-defined JSON output, datasets with results, or files in key-value store.
In Standby mode, an Actor provides a web server which can be used as a website, API, or an MCP server.
Actors are written with capital "A".

## How to integrate an Actor?

If asked about integration, you help developers integrate Actors into their projects.
You adapt to their stack and deliver integrations that are safe, well-documented, and production-ready.
The best way to integrate Actors is as follows.

- **AI agents and MCP clients** — the [Apify MCP server](https://docs.apify.com/integrations/mcp.md) at `https://mcp.apify.com` (remote, streamable HTTP, OAuth on first use).
- **Agentic workflows and local Actor development** — [Agent Skills](https://apify.com/.well-known/agent-skills/index.json) with the [Apify CLI](https://docs.apify.com/cli/docs.md): `npm install -g apify-cli`, then `apify login`.
- **JavaScript/TypeScript projects** — the official [JS/TS client](https://docs.apify.com/api/client/js/docs.md): `npm install apify-client`.
- **Python projects** — the official [Python client](https://docs.apify.com/api/client/python/docs.md): `pip install apify-client`.
- **Any other language** — the [REST API](https://docs.apify.com/api/v2.md).

For usage examples, see the [API](#api) section below.

For more details, see Apify documentation as [Markdown index](https://docs.apify.com/llms.txt) and [Markdown full-text](https://docs.apify.com/llms-full.txt).

# README

## Polymarket Event Markets Scraper — official public API, no login

Live market data from **Polymarket**, the largest prediction market, via its official public
Gamma API (`gamma-api.polymarket.com`). Polymarket's own docs describe this endpoint as the
public way to pull market data — no account, no API key, no proxies.

### Tested (2026-09-02)

| Event slug | Markets returned | Time |
|---|---:|---:|
| `xi-jinping-out-before-2027` | 1 | <1s |
| `presidential-election-winner-2028` | 128 | <1s |

Each event returns every market nested inside it in a single response — no separate paging
needed for a given event.

### Polymarket API — input

```json
{
  "targets": ["presidential-election-winner-2028"],
  "maxItems": 2000
}
```

Each target is an **event slug** — the part of the URL after `polymarket.com/event/`. One event
groups related markets (e.g. one candidate per market inside a presidential-election event). A
slug with no event returns 0 items for that target only (no charge).

### Polymarket API — output fields

One dataset item per market:

| Field | |
|---|---|
| `market_id` / `slug` / `condition_id` | market identifiers |
| `question` | the market's yes/no question |
| `outcomes` / `outcome_prices` | JSON-encoded arrays, e.g. `["Yes","No"]` / `["0.25","0.75"]` |
| `active` / `closed` / `restricted` | market lifecycle flags |
| `volume_usd` / `volume_24h_usd` | total and 24h trading volume in USD |
| `liquidity_usd` | resting order-book liquidity |
| `best_bid` / `best_ask` / `last_price` | current order book and last trade |
| `open_time` / `close_time` | ISO 8601 lifecycle timestamps |
| `result` | UMA resolution status once settled |

No personal data: wallet-address fields (market creator, resolver) are intentionally excluded.
Output is market and pricing fields only.

### Why this over Polymarket's own site

polymarket.com is built for browsing one event at a time. This actor runs a batch of event slugs
in one call and hands back every nested market as structured rows — for market monitors,
historical price trackers, or quant research pipelines.

### Use Cases

- **Market monitor dashboards** — batch a list of event slugs into one structured table
  instead of opening each event page by hand
- **Historical price/volume tracking** — run on a schedule to build a time series of
  `best_bid`/`best_ask`/`volume_usd` per market for later analysis
- **Quant research input** — feed `outcome_prices` and `volume_usd` straight into a model
  without screen-scraping the site

### Pricing

Pay per event: **$1.00 per 1,000 markets** collected. Nothing else.

# Actor input Schema

## `targets` (type: `array`):

Polymarket のイベントページ URL 末尾の slug を指定（例: polymarket.com/event/presidential-election-winner-2028 → presidential-election-winner-2028）。1 イベントに複数マーケットがぶら下がる構造（大統領選イベント配下に候補者ごとのマーケットが並ぶ等）。複数指定可

## `maxItems` (type: `integer`):

1 run で取得する最大件数

## Actor input object example

```json
{
  "targets": [
    "presidential-election-winner-2028"
  ],
  "maxItems": 2000
}
```

# Actor output Schema

## `items` (type: `string`):

取得した各件（type=item）と、選択した分析の結果（type=analysis）

## `overview` (type: `string`):

件数・平均評点・期間・ネガティブ比率（下側信頼限界つき）

# API

You can run this Actor programmatically using our API. Below are code examples in JavaScript, Python, and CLI, as well as the OpenAPI specification and MCP server setup.

## JavaScript example

```javascript
import { ApifyClient } from 'apify-client';

// Initialize the ApifyClient with your Apify API token
// Replace the '<YOUR_API_TOKEN>' with your token
const client = new ApifyClient({
    token: '<YOUR_API_TOKEN>',
});

// Prepare Actor input
const input = {
    "targets": [
        "presidential-election-winner-2028"
    ]
};

// Run the Actor and wait for it to finish
const run = await client.actor("pappy-dev/polymarket-markets").call(input);

// Fetch and print Actor results from the run's dataset (if any)
console.log('Results from dataset');
console.log(`💾 Check your data here: https://console.apify.com/storage/datasets/${run.defaultDatasetId}`);
const { items } = await client.dataset(run.defaultDatasetId).listItems();
items.forEach((item) => {
    console.dir(item);
});

// 📚 Want to learn more 📖? Go to → https://docs.apify.com/api/client/js/docs

```

## Python example

```python
from apify_client import ApifyClient

# Initialize the ApifyClient with your Apify API token
# Replace '<YOUR_API_TOKEN>' with your token.
client = ApifyClient("<YOUR_API_TOKEN>")

# Prepare the Actor input
run_input = { "targets": ["presidential-election-winner-2028"] }

# Run the Actor and wait for it to finish
run = client.actor("pappy-dev/polymarket-markets").call(run_input=run_input)

# Fetch and print Actor results from the run's dataset (if there are any)
print(f"💾 Check your data here: https://console.apify.com/storage/datasets/{run.default_dataset_id}")
for item in client.dataset(run.default_dataset_id).iterate_items():
    print(item)

# 📚 Want to learn more 📖? Go to → https://docs.apify.com/api/client/python/docs/quick-start

```

## CLI example

```bash
echo '{
  "targets": [
    "presidential-election-winner-2028"
  ]
}' |
apify call pappy-dev/polymarket-markets --silent --output-dataset

```

## MCP server setup

```json
{
    "mcpServers": {
        "apify": {
            "type": "http",
            "url": "https://mcp.apify.com/?tools=fetch-actor-details,pappy-dev/polymarket-markets"
        }
    }
}

```

The hosted server signs you in with OAuth on first connect, so no API token belongs in this config. Clients without OAuth support can send an `Authorization: Bearer <APIFY_API_TOKEN>` header instead, using a token from API & Integrations in Apify Console (https://console.apify.com/settings/integrations).

## OpenAPI specification

Download the OpenAPI definition: https://api.apify.com/v2/actors/GCQHVEuQaaItvK82q/builds/VphfBm8qeHtCpZNtm/openapi.json