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 completed run

The same inputs also work from your code or an AI assistant. See For developers.

Example results

96.45% chance for No

Xi Jinping out before 2027?

View market on Polymarket

Chance history

95.55%Aug 30, 12:00 AM
95.55%Aug 31, 12:00 AM
95.65%Sep 1, 12:00 AM
95.4%Sep 2, 12:00 AM
95.45%Sep 3, 12:00 AM
95.15%Sep 4, 12:00 AM
95.15%Sep 5, 12:00 AM
95.55%Sep 6, 12:00 AM
95.75%Sep 7, 12:00 AM
95.95%Sep 8, 12:00 AM
96.15%Sep 9, 12:00 AM
96.15%Sep 10, 12:00 AM
96.15%Sep 11, 12:00 AM
96.05%Sep 12, 12:00 AM
96.25%Sep 13, 12:00 AM
96.25%Sep 14, 12:00 AM
96.45%Sep 15, 12:00 AM
95.95%Sep 16, 12:00 AM
95.55%Sep 17, 12:00 AM
95.75%Sep 18, 12:00 AM
96.15%Sep 19, 12:00 AM
96.25%Sep 20, 12:00 AM
96.25%Sep 21, 12:00 AM
95.75%Sep 22, 12:00 AM
95.75%Sep 23, 12:00 AM
95.55%Sep 24, 12:00 AM
95.6%Sep 25, 12:00 AM
95.8%Sep 26, 12:00 AM
96.3%Sep 27, 12:00 AM
96.35%Sep 28, 12:00 AM
96.45%Sep 29, 12:00 AM
96.45%Sep 29, 1:51 AM

About the Polymarket tool

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 from polymarket.com. Last checked Sep 29, 2026.

Actions

Get odds history

1 credit

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

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

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

Call it from your code with one request. Change the values in input to run it on new data. To get an API key, open Developers at the bottom of Studio, turn on Developer mode and go to API keys.

cURL

curl 'https://api.fous.com/v1/query' \
  --fail-with-body --silent --show-error --max-time 180 \
  -H "Authorization: Bearer YOUR_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 about Polymarket

Can I run it with my own inputs?

Yes. Change the inputs in Studio and press Run, or send new inputs from your code, or ask a connected AI assistant.

Can I call this Polymarket tool as an API?

Yes. Send a POST request to /v1/query with your Fous API key and the inputs, and get JSON back.

How much does it cost?

Each completed run costs 1 credit. Failed runs without a completed receipt are free; completed work can remain charged if delivery is interrupted. 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. Some results are reused for up to 24 hours, and results that use your account or key are never reused. It was last verified on Sep 29, 2026.