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APIs, WebSocket, SDKs
unified for all financial data

We bring everything together that is required to build a successful trading system, fintech product, and empower your research. Twelve Data’s products include stock, forex, ETF, indices, fundamentals, various spreadsheets add-ins, and everything in between.

We also help to build unique solutions, educate, level-up the business, and much more.

Start with market data

{
  "symbol": "JPM",
  "name": "JPMorgan Chase & Co",
  "exchange": "NYSE",
  "currency": "USD",
  "datetime": "2021-03-26",
  "open": "154.30",
  "high": "155.28",
  "low": "152.92",
  "close": "153.00",
  "volume": "9,283,955",
  "previous_close": "152.55",
  "change": "0.45",
  "average_volume": "18,613,062
}
 

                
 

Designed for developers

The most powerful
and easy-to-use APIs

We understand how tedious it is to think about different formats and integration barriers. Our APIs share easy to understand logic across all endpoints. WebSockets share the same structure, so you get 2 in 1.

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Tools for your stack

We provide you with SDKs for the most popular languages.

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WebSocket

Connect to a real time stream of ultra low latency data.

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                 API
            
            
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from twelvedata import TDClient
 
td = TDClient(apikey="YOUR_API_KEY_HERE")
 
ts = td.time_series(
    symbol="AAPL",
    interval="1min",
    outputsize=12,
)
 
print(ts.as_json())
 


#include <cjson/cJSON.h> // https://github.com/DaveGamble/cJSON
#include <curl/curl.h>
#include <iostream>
#include <memory>
 
const char* REQUEST_URL = "https://api.twelvedata.com/time_series?symbol=AAPL&interval=1min&outputsize=12&apikey=YOUR_API_KEY_HERE";
 
// Take response data and write into the string
std::size_t write_callback(const char* data, std::size_t size, std::size_t count, std::string* out) {
    const std::size_t result = size * count;
    out->append(data, result);
 
    return result;
}
 
int main() {
    std::unique_ptr<std::string> responseData(new std::string());
    cJSON* json = nullptr;
    CURL* curl = curl_easy_init();
 
    curl_easy_setopt(curl, CURLOPT_URL, REQUEST_URL);
    curl_easy_setopt(curl, CURLOPT_HTTPGET, 1);
    curl_easy_setopt(curl, CURLOPT_WRITEDATA, responseData.get());
    curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_callback);
    curl_easy_perform(curl);
 
    json = cJSON_Parse(responseData->c_str());
    cJSON* metaField = cJSON_GetObjectItem(json, "meta");
    cJSON* valuesField = cJSON_GetObjectItem(json, "values");
    cJSON* symbolField = cJSON_GetObjectItem(metaField, "symbol");
    cJSON* closeField = cJSON_GetObjectItem(cJSON_GetArrayItem(valuesField, 0), "close");
 
    std::cout << "Received symbol: " << cJSON_GetStringValue(symbolField) << ", ";
    std::cout << "close: " << cJSON_GetStringValue(closeField) << std::endl;
 
    cJSON_Delete(json);
    curl_easy_cleanup(curl);
 
    return 0;
}
 


using System;
using System.Collections.Generic;
using System.Net;
using System.Text.Json;
 
namespace TwelveData
{
    public class TimeSeries
    {
        public Dictionary<string, string> meta { get; set; }
        public IList<Dictionary<string, string>> values { get; set; }
        public string status { get; set; }
    }
 
    class Prices
    {
        static void Main(string[] args)
        {
            using WebClient wc = new WebClient();
            var response = wc.DownloadString("https://api.twelvedata.com/time_series?symbol=AAPL&interval=1min&outputsize=12&apikey=YOUR_API_KEY_HERE");
            var timeSeries = JsonSerializer.Deserialize<TimeSeries>(response);
            if (timeSeries.status == "ok")
            {
                Console.WriteLine("Received symbol: " + timeSeries.meta["symbol"] + ", close: " + timeSeries.values[0]["close"]);
            }
        }
    }
}
 


import org.json.simple.parser.JSONParser;
import org.json.simple.JSONArray;
import org.json.simple.JSONObject;
 
import java.util.Scanner;
import java.net.HttpURLConnection;
import java.net.URL;
 
public class Main {
    private static final String REQUEST_URL = "https://api.twelvedata.com/time_series?symbol=AAPL&interval=1min&outputsize=12&apikey=YOUR_API_KEY_HERE";
 
    public static void main(String[] args) throws Exception {
        URL requestURL = new URL(REQUEST_URL);
        HttpURLConnection connection = (HttpURLConnection)requestURL.openConnection();
        StringBuffer responseData = new StringBuffer();
        JSONParser parser = new JSONParser();
 
        connection.setRequestMethod("GET");
        connection.setRequestProperty("User-Agent", "twelve_java/1.0");
        connection.connect();
 
        if (connection.getResponseCode() != 200) {
            throw new RuntimeException("Request failed. Error: " + connection.getResponseMessage());
        }
 
        Scanner scanner = new Scanner(requestURL.openStream());
        while (scanner.hasNextLine()) {
            responseData.append(scanner.nextLine());
        }
 
        JSONObject json = (JSONObject) parser.parse(responseData.toString());
        JSONObject meta = (JSONObject) json.get("meta");
        JSONArray values = (JSONArray) json.get("values");
        
        connection.disconnect();
    }
}
 


# install.packages("RcppSimdJson")
 
apikey <- "YOUR_API_KEY_HERE"
qry <- paste0(
        "https://api.twelvedata.com/time_series?",
        "symbol=AAPL&interval=1min&outputsize=12",
        "&apikey=", apikey)
res <- RcppSimdJson::fload(qry)
res
 


# pip install twelvedata[websocket]
 
from twelvedata import TDClient
 
def on_event(e):
    print(e)
 
td = TDClient(apikey="YOUR_API_KEY_HERE")
ws = td.websocket(symbols="AAPL", on_event=on_event)
ws.connect()
ws.keep_alive()
 


#include <websocketpp/config/asio_client.hpp>
#include <websocketpp/client.hpp>
#include <cjson/cJSON.h>
 
#include <iostream>
#include <iomanip>
#include <ctime>
 
namespace wlib = websocketpp::lib;
namespace ssl = boost::asio::ssl;
 
typedef websocketpp::client<websocketpp::config::asio_tls_client> wclient;
typedef wlib::shared_ptr<wlib::asio::ssl::context> context_ptr;
 
const char* ENDPOINT = "wss://ws.twelvedata.com/v1/quotes/price?apikey=YOUR_API_KEY_HERE";
 
const char* SUBSCRIBE_ACTION = "{"\
    "\"action\": \"subscribe\"," \
    "\"params\": {" \
        "\"symbols\": \"AAPL\"" \
    "}" \
"}";
 
int main() {
    wclient::connection_ptr connection;
    wlib::error_code error_code;
    wclient client;
    
    client.set_access_channels(websocketpp::log::alevel::all);
    client.clear_access_channels(websocketpp::log::alevel::frame_payload);
    client.set_error_channels(websocketpp::log::elevel::all);
 
    // Initialize Boost.ASIO
    client.init_asio();
 
    // Set TLS initialize handler
    client.set_tls_init_handler(wlib::bind([](auto* hostname, auto hdl) {
        context_ptr context = wlib::make_shared<ssl::context>(ssl::context::sslv23);
        context->set_verify_mode(ssl::verify_none);
 
        return context;
    }, ENDPOINT, websocketpp::lib::placeholders::_1));
 
    // Is called after the WebSocket handshake is complete
    client.set_open_handler([&client](auto hdl) {
        // Send subscribe action to stream
        client.send(hdl, SUBSCRIBE_ACTION, websocketpp::frame::opcode::text);
    });
 
    // Receive and handle messages from server
    client.set_message_handler([](auto hdl, wclient::message_ptr message) {
        cJSON* json = cJSON_Parse(message->get_payload().c_str());
 
        if (json == nullptr) {
            std::cout << "received invalid JSON: " << std::endl << message->get_payload() << std::endl;
            return;
        }
 
        // Get event type
        cJSON* eventTypeField = cJSON_GetObjectItem(json, "event");
        if (eventTypeField == nullptr) {
            std::cout << "unknown JSON structure" << std::endl;
            return;
        }
 
        // Extract string from event type
        const char* eventType = cJSON_GetStringValue(eventTypeField);
        if (strcmp(eventType, "subscribe-status") == 0) {
            cJSON* statusField = cJSON_GetObjectItem(json, "status");
            const char* status = cJSON_GetStringValue(statusField);
 
            if (strcmp(status, "ok") != 0) {
                std::cout << "Failed subscribe to stream" << std::endl;
                return;
            }
 
            cJSON* successField = cJSON_GetObjectItem(json, "success");
            cJSON* failsField = cJSON_GetObjectItem(json, "fails");
 
            // Iterate over the symbols that were successfully subscribed
            for (int idx = 0; idx < cJSON_GetArraySize(successField); idx++) {
                cJSON* item = cJSON_GetArrayItem(successField, idx);
                cJSON* symbolField = cJSON_GetObjectItem(item, "symbol");
                const char* symbol = cJSON_GetStringValue(symbolField);
 
                std::cout << "Success subscribed to `"<< symbol << "` " << "symbol." << std::endl;
            }
 
            // If we're unable to subscribe to some symbols
            for (int idx = 0; 0 < cJSON_GetArraySize(failsField); idx++) {
                cJSON* item = cJSON_GetArrayItem(failsField, idx);
                cJSON* symbolField = cJSON_GetObjectItem(item, "symbol");
                const char* symbol = cJSON_GetStringValue(symbolField);
 
                std::cout << "Failed to subscribe on `"<< symbol << "` " << "symbol." << std::endl;
            }
 
            return;
        }
 
        if (strcmp(eventType, "price") == 0) {
            cJSON* timestampField = cJSON_GetObjectItem(json, "timestamp");
            cJSON* currencyField = cJSON_GetObjectItem(json, "currency");
            cJSON* symbolField = cJSON_GetObjectItem(json, "symbol");
            cJSON* priceField = cJSON_GetObjectItem(json, "price");
            time_t time = timestampField->valueint;
 
            std::cout << "[" << std::put_time(gmtime(&time), "%I:%M:%S %p") << "]: ";
            std::cout << "The symbol `" << cJSON_GetStringValue(symbolField) << "` ";
            std::cout << "has changed price to " << priceField->valuedouble << " ";
            
            if (currencyField != nullptr) {
                std::cout << "(" << cJSON_GetStringValue(currencyField) << ")" << std::endl;
            } else {
                std::cout << std::endl;
            }
            
            return;
        }
 
        // Free memory of JSON structure
        cJSON_Delete(json);
    });
 
    // New connection to WebSocket endpoint
    connection = client.get_connection(ENDPOINT, error_code);
    if (error_code) {
        std::cout << "Failed connection. Message: " << error_code.message() << std::endl;
        return -1;
    }
 
    // Connect to websocket endpoint
    client.connect(connection);
    client.run();
}
 


using System;
using WebSocket4Net; //https://github.com/kerryjiang/WebSocket4Net
 
namespace TwelveData
{
    class TDWebSocket
    {
        WebSocket ws = new WebSocket("wss://ws.twelvedata.com/v1/quotes/price?apikey=YOUR_API_KEY_HERE");
 
        static void Main()
        {
            new TDWebSocket().Init();
        }
 
        public void Init()
        {
            ws.Opened += OnOpen;
            ws.Closed += OnClose;
            ws.Error += OnError;
            ws.MessageReceived += OnEvent;
 
            ws.Open();
            Console.ReadLine();
        }
 
        private void OnOpen(object sender, EventArgs e)
        {
            Console.WriteLine("TDWebSocket opened!");
            ws.Send("{\"action\": \"subscribe\", \"params\":{\"symbols\": \"AAPL\"}}");
        }
 
        private void OnClose(object sender, EventArgs e)
        {
            Console.WriteLine("TDWebSocket closed");
        }
 
        private void OnError(object sender, SuperSocket.ClientEngine.ErrorEventArgs e)
        {
            Console.WriteLine("TDWebSocket ERROR: " + e.Exception.Message);
        }
 
        private void OnEvent(object sender, MessageReceivedEventArgs e)
        {
            Console.WriteLine(e.Message);
        }
    }
}
 


import org.java_websocket.handshake.ServerHandshake;
import org.java_websocket.client.WebSocketClient;
 
import org.json.simple.parser.ParseException;
import org.json.simple.parser.JSONParser;
import org.json.simple.JSONObject;
 
import java.net.URI;
 
public class Main {
    private static final String ENDPOINT = "wss://ws.twelvedata.com/v1/quotes/price?apikey=YOUR_API_KEY_HERE";
 
    public static void main(String[] args) throws Exception {
        WebSocketClient client = new WebSocketClient(new URI(ENDPOINT)) {
            @Override
            public void onOpen(ServerHandshake handshake) {
                System.out.println("TDWebSocket opened!");
                send("{\"action\": \"subscribe\", \"params\":{\"symbols\": \"AAPL\"}}");
            }
 
            @Override
            public void onMessage(String message) {
                JSONParser parser = new JSONParser();
                try {
                    JSONObject json = (JSONObject) parser.parse(message);
                    System.out.println(json);
                } catch(ParseException e) {
                    e.printStackTrace();
                }
            }
 
            @Override
            public void onClose(int status, String reason, boolean remote) {
                System.out.println("TDWebSocket closed.");
                this.close();
            }
 
            @Override
            public void onError(Exception e) {
                e.printStackTrace();
            }
        };
 
        client.connectBlocking();
    }
}
 


# install.packages("websocket")
 
library(websocket)
 
ws <- WebSocket$new("wss://ws.twelvedata.com/v1/quotes/price?apikey=YOUR_API_KEY_HERE")
ws$onOpen(function(event) {
    cat("TDWebSocket opened!\n")
})
ws$onClose(function(event) {
    cat("TDWebSocket closed with code ", event$code,
        " and reason ", event$reason, "\n", sep = "")
})
ws$onError(function(event) {
    cat("TDWebSocket ERROR: ", event$message, "\n")
})
ws$onMessage(function(event) {
    cat("Received event:", event$data, "\n")
})
 
ws$send('{"action": "subscribe", "params":{"symbols": "AAPL"}}')
 

 

            
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Why Twelve Data

A technology-first approach together
with exceptional service.

Data coverage

We support around 100 000 symbols across a different range of assets available from all over the world.

Fast moving

Every day, from year to year we release hundreds of new features to make sure that you stay ahead of the industry.

Reliability

Our system has 99.95% SLA. Twelve Data tends to raise the standards for quality and uptime to the next level.

Latency

Real time data streaming via WebSockets has ultra low latency at only ~170 ms on average for all instruments.

Think globally

More than data provider

For those individuals and companies who want to challenge the world, Twelve Data makes it possible to achieve their goals. Our decentalized team is located across the world and helps to make next big step.

700М+

API requests performed per day,
peaking 1,000,000 per minute.

250+

Exchanges are supported,
across the world.

80k+

Different financial assets
and many more to come.

90+

Countries from where data
comes from.

Explore data

All markets data

Stock, crypto, forex, ETF, and other symbols Search through 100K+ symbols

160,000+ symbols

2,000+ pairs

4,800+ pairs

25,000+ symbols

1,800+ symbols

Ready to get started?

Explore Market Data, or create an account and start working with the data. You can also leave us a note and we will prepare custom plan for your needs.

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Pay for what you need. No hidden or implicit fees.

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Begin with API

Integrate Twelve Data in as little as 5 minutes.

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