Venue volume and 24h market share
curl --request GET \
--url https://api.coinstats.app/v1/prediction/volume \
--header 'X-API-KEY: <api-key>'import requests
url = "https://api.coinstats.app/v1/prediction/volume"
headers = {"X-API-KEY": "<api-key>"}
response = requests.get(url, headers=headers)
print(response.text)const options = {method: 'GET', headers: {'X-API-KEY': '<api-key>'}};
fetch('https://api.coinstats.app/v1/prediction/volume', options)
.then(res => res.json())
.then(res => console.log(res))
.catch(err => console.error(err));<?php
$curl = curl_init();
curl_setopt_array($curl, [
CURLOPT_URL => "https://api.coinstats.app/v1/prediction/volume",
CURLOPT_RETURNTRANSFER => true,
CURLOPT_ENCODING => "",
CURLOPT_MAXREDIRS => 10,
CURLOPT_TIMEOUT => 30,
CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
CURLOPT_CUSTOMREQUEST => "GET",
CURLOPT_HTTPHEADER => [
"X-API-KEY: <api-key>"
],
]);
$response = curl_exec($curl);
$err = curl_error($curl);
curl_close($curl);
if ($err) {
echo "cURL Error #:" . $err;
} else {
echo $response;
}package main
import (
"fmt"
"net/http"
"io"
)
func main() {
url := "https://api.coinstats.app/v1/prediction/volume"
req, _ := http.NewRequest("GET", url, nil)
req.Header.Add("X-API-KEY", "<api-key>")
res, _ := http.DefaultClient.Do(req)
defer res.Body.Close()
body, _ := io.ReadAll(res.Body)
fmt.Println(string(body))
}HttpResponse<String> response = Unirest.get("https://api.coinstats.app/v1/prediction/volume")
.header("X-API-KEY", "<api-key>")
.asString();require 'uri'
require 'net/http'
url = URI("https://api.coinstats.app/v1/prediction/volume")
http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true
request = Net::HTTP::Get.new(url)
request["X-API-KEY"] = '<api-key>'
response = http.request(request)
puts response.read_body{
"success": true,
"timestamp": "2025-06-19T12:00:00.000Z",
"data": {
"venues": [
{
"venue": "kalshi",
"coverage": "complete",
"markets": 402115,
"volume": 2350000000,
"volume24hr": 55000000,
"computing": false,
"computedAt": "2023-11-07T05:31:56Z",
"coverageNote": "open markets"
}
],
"marketShare24hr": [
{
"venue": "kalshi",
"share": 0.3143
}
],
"marketShareAvailable": true,
"marketShareBlockedBy": "<string>",
"categories": [
{
"slug": "politics",
"label": "Politics",
"events": 123,
"volume24hr": 123
}
],
"categoriesTop": 24
}
}{
"statusCode": 400,
"message": "Bad Request",
"requestId": "11111111-2222-3333-4444-555555555555",
"path": "<requested-endpoint>"
}{
"statusCode": 401,
"message": "Unauthorized",
"requestId": "11111111-2222-3333-4444-555555555555",
"path": "<requested-endpoint>"
}{
"statusCode": 403,
"message": "Forbidden",
"requestId": "11111111-2222-3333-4444-555555555555",
"path": "<requested-endpoint>"
}{
"statusCode": 404,
"message": "Not Found",
"requestId": "11111111-2222-3333-4444-555555555555",
"path": "<requested-endpoint>"
}{
"statusCode": 409,
"message": "Transactions not synced",
"requestId": "11111111-2222-3333-4444-555555555555",
"path": "<requested-endpoint>"
}{
"statusCode": 429,
"message": "Rate limit exceeded",
"requestId": "11111111-2222-3333-4444-555555555555",
"path": "<requested-endpoint>"
}{
"statusCode": 503,
"message": "Service Unavailable. Please Contact Support"
}Analytics
Venue Volume
Venue volume and 24h market share
GET
/
v1
/
prediction
/
volume
Venue volume and 24h market share
curl --request GET \
--url https://api.coinstats.app/v1/prediction/volume \
--header 'X-API-KEY: <api-key>'import requests
url = "https://api.coinstats.app/v1/prediction/volume"
headers = {"X-API-KEY": "<api-key>"}
response = requests.get(url, headers=headers)
print(response.text)const options = {method: 'GET', headers: {'X-API-KEY': '<api-key>'}};
fetch('https://api.coinstats.app/v1/prediction/volume', options)
.then(res => res.json())
.then(res => console.log(res))
.catch(err => console.error(err));<?php
$curl = curl_init();
curl_setopt_array($curl, [
CURLOPT_URL => "https://api.coinstats.app/v1/prediction/volume",
CURLOPT_RETURNTRANSFER => true,
CURLOPT_ENCODING => "",
CURLOPT_MAXREDIRS => 10,
CURLOPT_TIMEOUT => 30,
CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
CURLOPT_CUSTOMREQUEST => "GET",
CURLOPT_HTTPHEADER => [
"X-API-KEY: <api-key>"
],
]);
$response = curl_exec($curl);
$err = curl_error($curl);
curl_close($curl);
if ($err) {
echo "cURL Error #:" . $err;
} else {
echo $response;
}package main
import (
"fmt"
"net/http"
"io"
)
func main() {
url := "https://api.coinstats.app/v1/prediction/volume"
req, _ := http.NewRequest("GET", url, nil)
req.Header.Add("X-API-KEY", "<api-key>")
res, _ := http.DefaultClient.Do(req)
defer res.Body.Close()
body, _ := io.ReadAll(res.Body)
fmt.Println(string(body))
}HttpResponse<String> response = Unirest.get("https://api.coinstats.app/v1/prediction/volume")
.header("X-API-KEY", "<api-key>")
.asString();require 'uri'
require 'net/http'
url = URI("https://api.coinstats.app/v1/prediction/volume")
http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true
request = Net::HTTP::Get.new(url)
request["X-API-KEY"] = '<api-key>'
response = http.request(request)
puts response.read_body{
"success": true,
"timestamp": "2025-06-19T12:00:00.000Z",
"data": {
"venues": [
{
"venue": "kalshi",
"coverage": "complete",
"markets": 402115,
"volume": 2350000000,
"volume24hr": 55000000,
"computing": false,
"computedAt": "2023-11-07T05:31:56Z",
"coverageNote": "open markets"
}
],
"marketShare24hr": [
{
"venue": "kalshi",
"share": 0.3143
}
],
"marketShareAvailable": true,
"marketShareBlockedBy": "<string>",
"categories": [
{
"slug": "politics",
"label": "Politics",
"events": 123,
"volume24hr": 123
}
],
"categoriesTop": 24
}
}{
"statusCode": 400,
"message": "Bad Request",
"requestId": "11111111-2222-3333-4444-555555555555",
"path": "<requested-endpoint>"
}{
"statusCode": 401,
"message": "Unauthorized",
"requestId": "11111111-2222-3333-4444-555555555555",
"path": "<requested-endpoint>"
}{
"statusCode": 403,
"message": "Forbidden",
"requestId": "11111111-2222-3333-4444-555555555555",
"path": "<requested-endpoint>"
}{
"statusCode": 404,
"message": "Not Found",
"requestId": "11111111-2222-3333-4444-555555555555",
"path": "<requested-endpoint>"
}{
"statusCode": 409,
"message": "Transactions not synced",
"requestId": "11111111-2222-3333-4444-555555555555",
"path": "<requested-endpoint>"
}{
"statusCode": 429,
"message": "Rate limit exceeded",
"requestId": "11111111-2222-3333-4444-555555555555",
"path": "<requested-endpoint>"
}{
"statusCode": 503,
"message": "Service Unavailable. Please Contact Support"
}1 credit per request
You will get
You will get
- Each venue’s lifetime and 24h volume and market count, with its
coveragestated (completeorpartial, explained incoverageNote). - Kalshi’s totals cover every open Kalshi market, summed hourly from its catalog, not only the markets this API lists.
- Each venue’s share of the 24h volume (
marketShare24hr), computed only across venues with complete coverage;nullotherwise, withmarketShareBlockedBysaying why. - Choose the venues with
view:intl(default) Polymarket and Kalshi,usPolymarket US and Kalshi,allevery venue. - With
include=categories, the 24h volume of Polymarket’s busiest open events in each category.
Authorizations
API key required to access the endpoints. Generate one from your dashboard at https://openapi.coinstats.app and pass it in the X-API-KEY request header. Never expose your key in client-side code.
Query Parameters
Which venues get a row: intl (default) Polymarket and Kalshi, as before Polymarket US was added; us Polymarket US and Kalshi; all every venue. marketShare24hr counts only the venues with complete coverage, so under us (Polymarket US is partial) it is null.
Available options:
intl, us, all categories: also categories[], per category Polymarket's categoriesTop (24) busiest open events counted and their 24h volume summed: the head of each category, not all of it.
Available options:
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