Get Oddpool ID by ticker

curl --request GET \
  --url https://api.oddpool.com/reference/v2/events/lookup

import requests

url = "https://api.oddpool.com/reference/v2/events/lookup"

response = requests.get(url)

print(response.text)

const options = {method: 'GET'};

fetch('https://api.oddpool.com/reference/v2/events/lookup', 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.oddpool.com/reference/v2/events/lookup",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "GET",
]);

$response = curl_exec($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.oddpool.com/reference/v2/events/lookup"

	req, _ := http.NewRequest("GET", url, nil)

	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.oddpool.com/reference/v2/events/lookup")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.oddpool.com/reference/v2/events/lookup")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Get.new(url)

response = http.request(request)
puts response.read_body

GET

reference

events

lookup

Get Oddpool ID by ticker

curl --request GET \
  --url https://api.oddpool.com/reference/v2/events/lookup

import requests

url = "https://api.oddpool.com/reference/v2/events/lookup"

response = requests.get(url)

print(response.text)

const options = {method: 'GET'};

fetch('https://api.oddpool.com/reference/v2/events/lookup', 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.oddpool.com/reference/v2/events/lookup",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "GET",
]);

$response = curl_exec($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.oddpool.com/reference/v2/events/lookup"

	req, _ := http.NewRequest("GET", url, nil)

	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.oddpool.com/reference/v2/events/lookup")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.oddpool.com/reference/v2/events/lookup")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Get.new(url)

response = http.request(request)
puts response.read_body

Give this endpoint a Kalshi, Polymarket, or Polymarket US id and it returns the matched event: its Oddpool ID, every venue that lists it, every outcome, the entity each outcome refers to, and the venue ticker you trade on each side. Kalshi input can be an event ticker or a market ticker (a market ticker resolves to its parent event). Polymarket input can be a conditionId, event slug, or numeric event id. Polymarket US input is the market slug.

Query parameters

Pass either oddpool_id, or venue + id.

string

kalshi, polymarket, or polymarket_us (see Supported venues). Required when you pass id.

string

The venue’s id. Kalshi: event or market ticker. Polymarket: conditionId (0x…), event slug, or numeric event id. Polymarket US: market slug.

string

An Oddpool event id (OPI-XXXXXXXX) instead of a venue id.

Request

curl -H "X-API-Key: your_api_key" \
  "https://api.oddpool.com/reference/v2/events/lookup?venue=kalshi&id=KXBRASILEIROGAME-26MAY30GPACOR-GPA"

import requests

r = requests.get(
    "https://api.oddpool.com/reference/v2/events/lookup",
    headers={"X-API-Key": "your_api_key"},
    params={"venue": "kalshi", "id": "KXBRASILEIROGAME-26MAY30GPACOR-GPA"},
)
event = r.json()

Response

A matched event. Every field is defined in Response fields.

{
  "oddpool_id": "OPI-OO4GBEZJ",
  "title": "Gremio vs Corinthians",
  "subject_domain": "Sports",
  "classified_at": "2026-05-25T18:42:11Z",
  "venue_listings": [
    {
      "oddpool_id": "OPL:KALSHI:KXBRASILEIROGAME-26MAY30GPACOR",
      "venue": "kalshi",
      "venue_event_id": "KXBRASILEIROGAME-26MAY30GPACOR",
      "venue_question": "Who will win the Brasileirão match Grêmio vs Corinthians on May 30?"
    },
    {
      "oddpool_id": "OPL:POLYMARKET:445404",
      "venue": "polymarket",
      "venue_event_id": "445404",
      "venue_question": "Grêmio vs Corinthians: Match Result"
    }
  ],
  "venue_pairs": [
    {
      "venue_a": "kalshi",
      "venue_a_event_id": "KXBRASILEIROGAME-26MAY30GPACOR",
      "venue_b": "polymarket",
      "venue_b_event_id": "445404",
      "basis_class": "identical",
      "outcome_universe": "identical"
    }
  ],
  "outcomes": [
    {
      "oddpool_id": "OPO:OO4GBEZJ:GREMIO-FBPA-JITQ",
      "label": "Grêmio FBPA",
      "outcome_kind": "multi_class_named",
      "outcome_params": {},
      "entity": {
        "oddpool_id": "OPE:TEAM:GREMIO-FBPA",
        "kind": "team",
        "canonical_name": "Grêmio FBPA",
        "aliases": ["Grêmio", "Gremio", "Tricolor Gaúcho"],
        "wikidata_qid": "Q190301",
        "metadata": {
          "league": "Campeonato Brasileiro Série A",
          "sport": "association football",
          "city": "Porto Alegre"
        }
      },
      "venue_listings": [
        {
          "oddpool_id": "OPL:KALSHI:KXBRASILEIROGAME-26MAY30GPACOR-GPA",
          "venue": "kalshi",
          "venue_market_id": "KXBRASILEIROGAME-26MAY30GPACOR-GPA",
          "venue_event_id": "KXBRASILEIROGAME-26MAY30GPACOR",
          "venue_yes_token": null,
          "venue_no_token": null,
          "venue_question": "Gremio"
        },
        {
          "oddpool_id": "OPL:POLYMARKET:0X830BC4CBE4FC945B6CEE65EB1B0A5FEBACB16004C4C7B702A20376E6E12B1429",
          "venue": "polymarket",
          "venue_market_id": "0x830bc4cbe4fc945b6cee65eb1b0a5febacb16004c4c7b702a20376e6e12b1429",
          "venue_event_id": "445404",
          "venue_yes_token": "30372052209701849468461148034092137114942310389987253992056832502897412952481",
          "venue_no_token": "74064390857285423190264600895526377480606423020566358098133374778358135580812",
          "venue_question": "Grêmio FBPA"
        }
      ],
      "venue_pairs": [
        {
          "venue_a": "kalshi",
          "venue_b": "polymarket",
          "fungible": false,
          "divergence_axes": ["condition_scope"],
          "divergence_reason": "Both resolve Yes if Grêmio wins in 90 minutes plus stoppage time, but Kalshi sends cancellation/reschedule over two weeks to fair price while Polymarket keeps postponed games open and canceled-without-makeup resolves No."
        }
      ]
    }
  ]
}

Errors

Returns 404 when no match exists for the id:

{
  "detail": {
    "error_code": "EVENT_NOT_FOUND",
    "error": "no_canonical_match",
    "venue": "kalshi",
    "id": "KXNONEXIST-99"
  }
}

Using Wikidata IDs List matched events

Reference Data API

Matched events

Entities

Get Oddpool ID by ticker

Query parameters

Request

Response

Errors

​Query parameters

​Request

​Response

​Errors

Query parameters

Request

Response

Errors