Latest mark (last trade price) for up to 200 contract/token pairs
A mark is defined as the LAST TRADE PRICE, on the 0–100 scale used by candles/trades (not the 0–1 probability scale used by PnL consumers). Rate-limit bucket: HEAVY and explicitly uncacheable at the HTTP layer (Cache-Control: no-store, no ETag); real-time consumers should prefer the WebSocket feed instead.
Pairs that have never traded are omitted from the response entirely (no zero/null placeholder).
Cost: larger requests consume more of your quota based on the number of pairs requested. Since the hard cap is 200 pairs, the maximum possible cost for one request is 2 heavy units.
curl --request GET \
--url https://md.kairos.trade/v1/marks \
--header 'X-Api-Key: <api-key>' \
--header 'X-Api-Secret: <api-key>' \
--header 'X-Client-Id: <api-key>'import requests
url = "https://md.kairos.trade/v1/marks"
headers = {
"X-Client-Id": "<api-key>",
"X-Api-Key": "<api-key>",
"X-Api-Secret": "<api-key>"
}
response = requests.get(url, headers=headers)
print(response.text)const options = {
method: 'GET',
headers: {
'X-Client-Id': '<api-key>',
'X-Api-Key': '<api-key>',
'X-Api-Secret': '<api-key>'
}
};
fetch('https://md.kairos.trade/v1/marks', 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://md.kairos.trade/v1/marks",
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>",
"X-Api-Secret: <api-key>",
"X-Client-Id: <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://md.kairos.trade/v1/marks"
req, _ := http.NewRequest("GET", url, nil)
req.Header.Add("X-Client-Id", "<api-key>")
req.Header.Add("X-Api-Key", "<api-key>")
req.Header.Add("X-Api-Secret", "<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://md.kairos.trade/v1/marks")
.header("X-Client-Id", "<api-key>")
.header("X-Api-Key", "<api-key>")
.header("X-Api-Secret", "<api-key>")
.asString();require 'uri'
require 'net/http'
url = URI("https://md.kairos.trade/v1/marks")
http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true
request = Net::HTTP::Get.new(url)
request["X-Client-Id"] = '<api-key>'
request["X-Api-Key"] = '<api-key>'
request["X-Api-Secret"] = '<api-key>'
response = http.request(request)
puts response.read_body{
"marks": [
{
"contract_id": "0xabc123",
"token_id": "18812649149814341758733697580460697418474693998558159483117",
"price": 63.5
}
]
}{
"error": {
"code": "invalid_request",
"message": "pairs exceeds maximum 200"
}
}{
"error": {
"code": "unauthorized",
"message": "valid X-Client-Id, X-Api-Key, and X-Api-Secret headers are required"
}
}{
"error": {
"code": "ip_not_whitelisted",
"message": "source IP not in credential whitelist"
}
}{
"error": {
"code": "rate_limited",
"message": "rate limit exceeded"
}
}{
"error": {
"code": "internal",
"message": "marks query failed"
}
}{
"error": {
"code": "rate_limiter_unavailable",
"message": "rate limiter temporarily unavailable"
}
}Authorizations
Credential client id (kairos_ck_...). Must be sent together with X-Api-Key and X-Api-Secret.
64-char hex API key. Must be sent together with X-Client-Id and X-Api-Secret.
64-char hex API secret. Must be sent together with X-Client-Id and X-Api-Key.
Query Parameters
kalshi, polymarket, opinion, predictfun, hyperliquid, kalshi_offchain, dome Comma-separated contract_id:token_id pairs. Up to 200. Each pair must contain a non-empty contract_id and token_id separated by exactly one colon.
Response
Marks for the requested pairs, in request order; never-traded pairs are omitted.
One entry per pair that has ever traded, in request order. Never-traded pairs are omitted.
Show child attributes
Show child attributes
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curl --request GET \
--url https://md.kairos.trade/v1/marks \
--header 'X-Api-Key: <api-key>' \
--header 'X-Api-Secret: <api-key>' \
--header 'X-Client-Id: <api-key>'import requests
url = "https://md.kairos.trade/v1/marks"
headers = {
"X-Client-Id": "<api-key>",
"X-Api-Key": "<api-key>",
"X-Api-Secret": "<api-key>"
}
response = requests.get(url, headers=headers)
print(response.text)const options = {
method: 'GET',
headers: {
'X-Client-Id': '<api-key>',
'X-Api-Key': '<api-key>',
'X-Api-Secret': '<api-key>'
}
};
fetch('https://md.kairos.trade/v1/marks', 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://md.kairos.trade/v1/marks",
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>",
"X-Api-Secret: <api-key>",
"X-Client-Id: <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://md.kairos.trade/v1/marks"
req, _ := http.NewRequest("GET", url, nil)
req.Header.Add("X-Client-Id", "<api-key>")
req.Header.Add("X-Api-Key", "<api-key>")
req.Header.Add("X-Api-Secret", "<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://md.kairos.trade/v1/marks")
.header("X-Client-Id", "<api-key>")
.header("X-Api-Key", "<api-key>")
.header("X-Api-Secret", "<api-key>")
.asString();require 'uri'
require 'net/http'
url = URI("https://md.kairos.trade/v1/marks")
http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true
request = Net::HTTP::Get.new(url)
request["X-Client-Id"] = '<api-key>'
request["X-Api-Key"] = '<api-key>'
request["X-Api-Secret"] = '<api-key>'
response = http.request(request)
puts response.read_body{
"marks": [
{
"contract_id": "0xabc123",
"token_id": "18812649149814341758733697580460697418474693998558159483117",
"price": 63.5
}
]
}{
"error": {
"code": "invalid_request",
"message": "pairs exceeds maximum 200"
}
}{
"error": {
"code": "unauthorized",
"message": "valid X-Client-Id, X-Api-Key, and X-Api-Secret headers are required"
}
}{
"error": {
"code": "ip_not_whitelisted",
"message": "source IP not in credential whitelist"
}
}{
"error": {
"code": "rate_limited",
"message": "rate limit exceeded"
}
}{
"error": {
"code": "internal",
"message": "marks query failed"
}
}{
"error": {
"code": "rate_limiter_unavailable",
"message": "rate limiter temporarily unavailable"
}
}
