Polymarket

Prediction market odds, market trading volume and chance history

Polymarket shows searchable markets with search-time odds and sometimes-unavailable 24-hour volume, ranks open markets by trading, and tracks chances over time, sometimes without recent points.

Get odds history

Show how a Polymarket outcome’s chance changed over time from a market question or link. Among matching markets, use the highest-volume match. Closed markets may have no points in recent periods.

Your information

Market

The market question or a Polymarket market link, for example "Xi Jinping out before 2027?".

PeriodOptional

How far back to show, for example “Last week”. Defaults to “Last month”.

OutcomeOptional

Outcome to track, for example "No". Defaults to the first outcome, usually Yes.

1 credit per run

Example results

Outcome: No
Question: Xi Jinping out before 2027?
Market URL: polymarket.com
Current Chance (%): 96.45
Points: Points
Date Time Chance (%)
2026-08-30T00:00:23Z
95.55
2026-08-31T00:00:22Z
95.55
2026-09-01T00:00:34Z
95.65
2026-09-02T00:00:21Z
95.4
2026-09-03T00:00:26Z
95.45
2026-09-04T00:00:19Z
95.15
2026-09-05T00:00:20Z
95.15
2026-09-06T00:00:26Z
95.55
2026-09-07T00:00:34Z
95.75
2026-09-08T00:00:17Z
95.95
2026-09-09T00:00:25Z
96.15
2026-09-10T00:00:20Z
96.15
2026-09-11T00:00:22Z
96.15
2026-09-12T00:00:22Z
96.05
2026-09-13T00:00:21Z
96.25
2026-09-14T00:00:18Z
96.25
2026-09-15T00:00:17Z
96.45
2026-09-16T00:00:18Z
95.95
2026-09-17T00:00:20Z
95.55
2026-09-18T00:00:23Z
95.75
2026-09-19T00:00:24Z
96.15
2026-09-20T00:00:23Z
96.25
2026-09-21T00:00:20Z
96.25
2026-09-22T00:00:20Z
95.75
2026-09-23T00:00:22Z
95.75
2026-09-24T00:00:33Z
95.55
2026-09-25T00:00:25Z
95.6
2026-09-26T00:00:20Z
95.8
2026-09-27T00:00:20Z
96.3
2026-09-28T00:00:34Z
96.35
2026-09-29T00:00:21Z
96.45
2026-09-29T01:51:16Z
96.45

Points
Date Time	Chance (%)
2026-08-30T00:00:23Z	95.55
2026-08-31T00:00:22Z	95.55
2026-09-01T00:00:34Z	95.65
2026-09-02T00:00:21Z	95.4
2026-09-03T00:00:26Z	95.45
2026-09-04T00:00:19Z	95.15
2026-09-05T00:00:20Z	95.15
2026-09-06T00:00:26Z	95.55
2026-09-07T00:00:34Z	95.75
2026-09-08T00:00:17Z	95.95
2026-09-09T00:00:25Z	96.15
2026-09-10T00:00:20Z	96.15
2026-09-11T00:00:22Z	96.15
2026-09-12T00:00:22Z	96.05
2026-09-13T00:00:21Z	96.25
2026-09-14T00:00:18Z	96.25
2026-09-15T00:00:17Z	96.45
2026-09-16T00:00:18Z	95.95
2026-09-17T00:00:20Z	95.55
2026-09-18T00:00:23Z	95.75
2026-09-19T00:00:24Z	96.15
2026-09-20T00:00:23Z	96.25
2026-09-21T00:00:20Z	96.25
2026-09-22T00:00:20Z	95.75
2026-09-23T00:00:22Z	95.75
2026-09-24T00:00:33Z	95.55
2026-09-25T00:00:25Z	95.6
2026-09-26T00:00:20Z	95.8
2026-09-27T00:00:20Z	96.3
2026-09-28T00:00:34Z	96.35
2026-09-29T00:00:21Z	96.45
2026-09-29T01:51:16Z	96.45

Example data · Run in Studio for fresh results.

About Polymarket

Polymarket, also called Poly, Search markets finds topic-related markets ranked by total trading volume; enter a topic.

List trending markets returns open markets ranked by 24-hour trading volume; optionally choose a category and result count.

Get odds history shows an outcome’s chances over time; enter a market question or link, and optionally choose a period and outcome.

Built by Fous from polymarket.com and checked automatically; it last passed a check on Sep 29, 2026. Fous is not affiliated with Polymarket.

Actions

Get odds history

1 credit per run

Show how a Polymarket outcome’s chance changed over time from a market question or link. Among matching markets, use the highest-volume match. Closed markets may have no points in recent periods.

What you provide

Field	Type	Required	Description
Market`market`	Text	Required	The market question or a Polymarket market link, for example "Xi Jinping out before 2027?".Example: https://polymarket.com/event/xi-jinping-out-before-2027
Period`period`	Text	Optional	How far back to show, for example "last_week". Defaults to last_month.Example: Last month
Outcome`outcome`	Text	Optional	Outcome to track, for example "No". Defaults to the first outcome, usually Yes.Example: No

What you get

Field	Type	Description
Points`points`	List	Historical chances in time order, at hourly or daily spacing depending on the period.
Date Time`points[].date_time`	Date	Sample time in ISO 8601 UTC.Example: 2026-08-30T00:00:23Z
Chance (%)`points[].chance_percent`	Number	Chance at this time, as a percentage.Example: 95.55
Outcome`outcome`	Text	The tracked outcome.Example: No
Question`question`	Text	The matched market question.Example: Xi Jinping out before 2027?
Market URL`market_url`	Text	Link to the Polymarket event containing this market.Example: https://polymarket.com/event/xi-jinping-out-before-2027
Current Chance (%)`current_chance_percent`	Number	Current chance, as a percentage from 0 to 100.Example: 96.45

Example result

For Market: https://polymarket.com/event/xi-jinping-out-before-2027, Period: Last month, Outcome: No

JSON

{
  "points": [
    {
      "date_time": "2026-08-30T00:00:23Z",
      "chance_percent": 95.55
    },
    {
      "date_time": "2026-08-31T00:00:22Z",
      "chance_percent": 95.55
    },
    {
      "date_time": "2026-09-01T00:00:34Z",
      "chance_percent": 95.65
    }
  ],
  "outcome": "No",
  "question": "Xi Jinping out before 2027?",
  "market_url": "https://polymarket.com/event/xi-jinping-out-before-2027",
  "current_chance_percent": 96.45
}

List trending markets

1 credit per run

List the most-traded open Polymarket markets, ranked by 24-hour trading volume. Select a category or see all markets; markets outside the named categories are labeled Other.

What you provide

Field	Type	Required	Description
Category`category`	Text	Optional	Category to list, such as crypto; all includes every category.Example: Crypto
Max Results`max_results`	Number	Optional	Maximum number of markets to return, such as 20 (up to 50).Example: 5

What you get

Field	Type	Description
Markets`markets`	List	Open markets in descending order of 24-hour trading volume.
Link`markets[].link`	Text	Polymarket event page for this market.Example: https://polymarket.com/event/what-price-will-bitcoin-hit-in-september-2026
Slug`markets[].slug`	Text	Polymarket market slug.Example: Will bitcoin dip to 82pt5k in september 2026
Category`markets[].category`	Text	Market category.Example: Crypto
End Date`markets[].end_date`	Date	Scheduled market end date (YYYY-MM-DD).Example: 2026-10-01
Question`markets[].question`	Text	Market question.Example: Will Bitcoin dip to $82,500 in September?
Market ID`markets[].market_id`	Text	Polymarket market ID.Example: 4797724
Volume 24h (USD)`markets[].volume_24h_usd`	Number	Trading volume over the last 24 hours in USD.Example: 208708.63
Leading Outcome`markets[].leading_outcome`	Text	Outcome with the highest current chance.Example: Yes
Total Volume (USD)`markets[].total_volume_usd`	Number	Total trading volume in USD.Example: 446588.04
Leading Chance (%)`markets[].leading_chance_percent`	Number	Current chance for the leading outcome, in percent.Example: 76.5

Example result

For Category: Crypto, Max Results: 5

JSON

{
  "markets": [
    {
      "link": "https://polymarket.com/event/what-price-will-bitcoin-hit-in-september-2026",
      "slug": "will-bitcoin-dip-to-82pt5k-in-september-2026",
      "category": "Crypto",
      "end_date": "2026-10-01",
      "question": "Will Bitcoin dip to $82,500 in September?",
      "market_id": "4797724",
      "volume_24h_usd": 208708.63,
      "leading_outcome": "Yes",
      "total_volume_usd": 446588.04,
      "leading_chance_percent": 76.5
    },
    {
      "link": "https://polymarket.com/event/what-price-will-bitcoin-hit-in-september-2026",
      "slug": "will-bitcoin-dip-to-80k-in-september-2026-from-september-18",
      "category": "Crypto",
      "end_date": "2026-10-01",
      "question": "Will Bitcoin dip to $80,000 in September?",
      "market_id": "4689727",
      "volume_24h_usd": 165597.52,
      "leading_outcome": "No",
      "total_volume_usd": 536372.93,
      "leading_chance_percent": 82.65
    },
    {
      "link": "https://polymarket.com/event/clarity-act-signed-into-law-in-2026",
      "slug": "clarity-act-signed-into-law-in-2026",
      "category": "Crypto",
      "end_date": "2027-01-01",
      "question": "Clarity Act (H.R.3633) signed into law in 2026?",
      "market_id": "1163699",
      "volume_24h_usd": 152583.58,
      "leading_outcome": "No",
      "total_volume_usd": 23228936.07,
      "leading_chance_percent": 94.75
    }
  ]
}

Search markets

1 credit per run

Find Polymarket prediction markets about a topic, ranked by total trading volume, with outcome chances and market details. Odds are the quoted outcome prices at the time of the search; 24-hour volume may be unavailable for some markets.

What you provide

Field	Type	Required	Description
Topic`topic`	Text	Required	Words describing the event to find, for example Fed rate cut.Example: Fed rate cut
Max Results`max_results`	Number	Optional	Maximum markets to return, for example 10.Example: 5
Include Closed`include_closed`	Yes or no	Optional	Include closed markets too, for example false.Example: Yes

What you get

Field	Type	Description
Markets`markets`	List	Matching markets, highest total trading volume first.
Link`markets[].link`	Text	Polymarket market page.Example: https://polymarket.com/event/how-many-fed-rate-cuts-in-2026/will-no-fed-rate-cu…
Slug`markets[].slug`	Text	Polymarket market slug.Example: Will no fed rate cuts happen in 2026
Status`markets[].status`	Text	Market status.Example: Open
End Date`markets[].end_date`	Date	Market end date.Example: 2027-01-01
Outcomes`markets[].outcomes`	List	Outcome names and current chances in percent.
Question`markets[].question`	Text	Market question.Example: Will no Fed rate cuts happen in 2026?
Market ID`markets[].market_id`	Text	Polymarket market ID.Example: 616902
Event Title`markets[].event_title`	Text	Title of the enclosing event.Example: How many Fed rate cuts in 2026?
Volume 24h (USD)`markets[].volume_24h_usd`	Number	24-hour trading volume in USD, if available.Example: 36527.688199000004
Total Volume (USD)`markets[].total_volume_usd`	Number	Lifetime trading volume in USD.Example: 8646599.003723001

Example result

For Topic: Fed rate cut

JSON

{
  "markets": [
    {
      "link": "https://polymarket.com/event/how-many-fed-rate-cuts-in-2026/will-no-fed-rate-cuts-happen-in-2026",
      "slug": "will-no-fed-rate-cuts-happen-in-2026",
      "status": "open",
      "end_date": "2027-01-01",
      "outcomes": [
        {
          "name": "Yes",
          "chance_percent": 96.95
        },
        {
          "name": "No",
          "chance_percent": 3.05
        }
      ],
      "question": "Will no Fed rate cuts happen in 2026?",
      "market_id": "616902",
      "event_title": "How many Fed rate cuts in 2026?",
      "volume_24h_usd": 36527.688199000004,
      "total_volume_usd": 8646599.003723001
    },
    {
      "link": "https://polymarket.com/event/how-many-fed-rate-cuts-in-2026/will-11-fed-rate-cuts-happen-in-2026",
      "slug": "will-11-fed-rate-cuts-happen-in-2026",
      "status": "open",
      "end_date": "2027-01-01",
      "outcomes": [
        {
          "name": "Yes",
          "chance_percent": 0.05
        },
        {
          "name": "No",
          "chance_percent": 99.95
        }
      ],
      "question": "Will 11 Fed rate cuts happen in 2026?",
      "market_id": "616913",
      "event_title": "How many Fed rate cuts in 2026?",
      "volume_24h_usd": null,
      "total_volume_usd": 5272133.838100998
    },
    {
      "link": "https://polymarket.com/event/how-many-fed-rate-cuts-in-2026/will-10-fed-rate-cuts-happen-in-2026",
      "slug": "will-10-fed-rate-cuts-happen-in-2026",
      "status": "open",
      "end_date": "2027-01-01",
      "outcomes": [
        {
          "name": "Yes",
          "chance_percent": 0.05
        },
        {
          "name": "No",
          "chance_percent": 99.95
        }
      ],
      "question": "Will 10 Fed rate cuts happen in 2026?",
      "market_id": "616912",
      "event_title": "How many Fed rate cuts in 2026?",
      "volume_24h_usd": null,
      "total_volume_usd": 4954179.949515998
    }
  ]
}

For developers

Run this workflow from your own code. In Studio, turn on Developer mode and create an API key.

cURL

# First set your key: export FOUS_API_KEY='YOUR_FOUS_API_KEY'
: "${FOUS_API_KEY:?Set FOUS_API_KEY before running this example}"

curl 'https://api.fous.com/v1/query' \
  --fail-with-body --silent --show-error --max-time 120 \
  -H "Authorization: Bearer $FOUS_API_KEY" \
  -H 'Content-Type: application/json' \
  --data-raw '{
  "api": "@polymarket",
  "visibility": "public",
  "operation": "get_odds_history",
  "version": 1,
  "input": {
    "market": "https://polymarket.com/event/xi-jinping-out-before-2027",
    "period": "last_month",
    "outcome": "No"
  },
  "response": {
    "format": "json"
  }
}'

What you can do with it

Compare outcome chances across markets about a topic
Track changes in an outcome’s chance over time
Review open markets with the highest 24-hour trading volume
Find markets by category and compare leading outcomes
Identify markets with high lifetime trading volume

Questions

Is Fous affiliated with Polymarket?

No. Fous is not affiliated with Polymarket. This workflow reads the public polymarket.com website and returns its data.

How much does it cost?

Each run costs 1 credit. With pay-as-you-go, a credit costs 1¢; monthly plans cost less per credit.

Do I need a Polymarket account?

No. You only need a Fous account.

How current is the data?

Fous gets the data from polymarket.com when you run it; repeating the same request within a day may return the saved result. Fous checks this workflow automatically; it last passed a check on Sep 29, 2026.