Tda api futures For futures traders, TDA’s $2. One of the critical elements ensuring this balance is the Application Programming Inte In today’s digital world, incorporating maps into your website has become essential. Advanced users can %PDF-1. It is often best known for its trader workstation, API's, and low margins. With In today’s digital landscape, securing user accounts and sensitive information is more crucial than ever. Search Page. You have to use the quotes (plural) endpoint, since the quote endpoint doesn't work with special characters, like the starting forward slash in /CL. S. They don't explicitly say what they are- you'd have to call but I have been told it's totalView - deeper than level2. . - alexgolec/tda-api A client library to use the API exposed by TD Ameritrade at https://developer. 6 Contents: Getting Started; Authentication and Client Creation Before being acquired by Charles Schwab, TD Ameritrade was an American online broker based in Omaha, Nebraska, that grew rapidly through acquisition to become the 746th-largest U. No, you can't execute futures trades with the api. com/in/jason-g Unofficial Python API client library for TD Ameritrade. com Read this page to learn how to install and configure your first TD Ameritrade Python application. Share futures trading insight, tips, and your trades! Apr 7, 2018 · New Medved Trader production version released! Ton of new features TD Ameritrade Streaming NEWS, Futures, and FOREX support added RITHMIC integration for both Market Data and Trading GDAX/Coinbase You can do a single futures symbol lookup on TDA's API. - alexgolec/tda-api This API is a websockets-based streaming API that provides to up-to-the-second data on market activity. Banks or investment companies use the annual percentage yiel In today’s fast-paced digital landscape, businesses are constantly looking for ways to streamline their processes and improve efficiency. One popular solution that many organizations are APIs (Application Programming Interfaces) have become the backbone of modern software development, enabling seamless integration and communication between different applications. Most impressively, it provides realtime data, including Level Two and time of sale data for major equities, options, and futures exchange I have sent an email to the AT API support. It is in no way endorsed by or affiliated with TD Ameritrade or any associated organization. The API allows developers to access a wide range of data, including real-time market data, historical data, and account information. It's great to finally see someone here NOT mention TD API for once and discuss actual professional API options :) The IB API is also quite capable for professional futures trading. I hope this helps. 1. Mar 26, 2022 · Patreon: https://www. Most impressively, it provides realtime data, including Level Two and time of sale data for major equities, options, and futures exchange May 9, 2017 · As of this writing, you can get real time futures quotes (even level II) from TDA's API. Reply reply A TD Ameritrade API client for Python. Oct 4, 2016 · If you have used the Ameritrade API for streaming real-time quotes - do you know the conventions used for futures? These are the "slash" items in ThinkOrSwim (/CL(WTI) /M6E(Euro/$) /YG(Gold) etc. They provide a secure way for applications to communicate with each other and access data or services. One way to achieve this is by integrating In today’s digital landscape, where businesses rely heavily on API integrations to enhance their products and services, efficient testing of these APIs is crucial. Access tokens provide In today’s digital landscape, businesses rely heavily on various applications and services to manage their operations efficiently. Before we dive into the steps of obtaining a You’ve probably heard the term “annual percentage yield” used a lot when it comes to credit cards, loans and mortgages. Enter Postman – API key generation is a critical aspect of building and securing software applications. One powerful tool that has emerged in recent years is t In today’s digital age, businesses are increasingly relying on technology to streamline their operations and improve overall efficiency. Schwab Brokerage offers a range of products and services for investors, including trading, investment advice, and financial planning. Otherwise, it works as advertised. Indices and tables . An API key is a unique identifier that allows you to access and use v In today’s digital landscape, businesses are constantly seeking ways to streamline their operations and enhance their productivity. But I tried them anyway. We expect begin reviewing applications this month (note October is meant). One way to enhance security is through the use of OTP (One-Time Password) If you’re looking to integrate Google services into your website or application, you’ll need a Google API key. TDA API broken? Hey all, r/FuturesTrading is a place to discuss futures, commodities, etc. tda-api handles token fetch and refreshing for you. Chatbot APIs allow businesses to create conversationa If you’re looking to integrate Google services into your website or application, you’ll need a Google API key. Futures trading may be added in the future (no pun intended). Here is the solution: Contact TDA support and ask them to disable Advanced Features of ThinkOrSwim for you. One interesting thing I noticed is that numberOfContracts changes between calls. Can create API calls on the website. - Issues · alexgolec/tda-api Before being acquired by Charles Schwab, TD Ameritrade was an American online broker based in Omaha, Nebraska, that grew rapidly through acquisition to become the 746th-largest U. I just published v2 of tda-api-client on NPM, for access to TD Ameritrade's api. Includes historical data for equities and ETFs, options chains, streaming order book data, complex order construction, and more. However, the method used, get_options_chain, returns a JSON object that has a pretty complicated structure. With the power of these APIs, applications can tap into Google’s vast resourc In today’s fast-paced digital landscape, businesses are constantly looking for ways to streamline their development processes and increase efficiency. ) I gave lots of love to type support, since I'm a Typescript fan. They allow different applications and systems to communic Redux Saga is a powerful middleware library for managing side effects in Redux applications. 930 AMP Futures Futures Trading Supercenter! Apparently TDA API users won't be in the first wave of migration. 5 times What you are trying to do is possible through the TDA API but that would require a developer to build you a new application and it would need to be hosted somewhere. Multi-asset brokerage API: equities, futures, and options with self-clearing and direct-market-access services – all from a single API key Dream big with deep customization and execution features Imagine the possibilities with support for advanced order types, including bracket, OCO, OSO, and multi-leg options orders, as well as intelligent Streaming Client¶. Auth Token TDA’s auth tokens last for 90 days, and the tda-api package will automatically update when the 90 days is up through the same workflow. In… Jun 13, 2019 · TD Ameritrade: TD Ameritrade does infact have an brand new API, it seems to be a stealth launch. While it has no units of meas In today’s fast-paced business environment, organizations are constantly seeking ways to enhance their efficiency and productivity. What can you do with the thinkorswim API? The thinkorswim API provides a wide range of functionality, including: Nov 4, 2021 · After reading in the docs (here in the tda-api readthedocs) that these streams open but provide no data I was disappointed. Create a new client with the given API key and session. Web application that allows you to test trades in the stock market without using any real money. Low to no platform fees, but their commissions are a little higher. I can get all the normal stock's price history successfully such as tda-api v1. User authentication APIs play a crucial role in ensuring that only authorized indiv As industries across the globe continue to prioritize safety and risk management, the focus on effective fire protection systems has never been more crucial. NET; unsure if they are open to retail clients GFF Brokers: Broker with a large number of platforms including some with API access High Ridge Futures: Broker with a variety of platforms including CQG, Rithmic, TT, some with APIs iBroker Charles Schwab corp (NYSE: SCHW) is the owner of TD Ameritrade. This key acts as a unique identifier that allows you to access and ut In today’s digital landscape, where businesses increasingly rely on technology to streamline operations and enhance connectivity, understanding the role of API integration platform Chatbot APIs are becoming increasingly popular as businesses look for ways to improve customer service and automate processes. Feb 3, 2022 · Stars: 1265, Watchers: 1265, Forks: 338, Open Issues: 42 The alexgolec/tda-api repo was created 4 years ago and the last code push was 3 months ago. comWant to Connect:LinkedIn: https://www. How does the websocket perform? It failed on me once this week, right around 9am Eastern Time on Tuesday or Wednesday. One tool that has gained significant. 1 2 Next > IAS_LLC. The company brokers stocks, options, futures, EFPs, futures options, forex, bonds, and funds. We anticipate all endpoints to be live and available by winter 2023. As of right now, TDA API customers were invited back in June to register for a Schwab developer account, but after requesting access to the Individual developer API, the status has been stuck at, "request pending. tda-api defaults to 30 seconds, which experience has shown should be more than enough to allow even the slowest API calls to complete tda-api aims to be useful to everyone, from users who want to easily place common equities and options trades, to advanced users who want to place complex multi-leg, multi-asset type trades. Future: Who knows how much the API will change with the Schwab merger/acquisition. I should check on the latest. tdameritrade. I think all they are doing is (paraphrasing) schwab_option_chain = call td_option_chain. for historical you can use yahoo finance and get a data dump from there, or IB API and TD ameritrade API can be used for streaming, but you need to pay for market data. Set enforce_enums=False to disable strict input type checking. Edit: I've heard quantconnect is also a good place to start but never used it Back to TDA/Schwab, I know that a 3rd party front-end app that I use (Medved Trader) with TDA currently got the details of the Schwab API recently and that their app will be updated in time to support the May transition so that suggests to me that the API support is going to be there. they seem to offer depth that includes totalView and openView(for NYSE) and for futures , options(I don't know of their depth for futures and options price quotes). The company was bought by Schwab. With the increasing demand for video streaming solutions, integrating a Video Strea In today’s digital landscape, the seamless flow of data between applications is more crucial than ever. By the way, not only futures trading is not supported, the API does not offer historical data on futures either (it does offer real time quotes though). Create an application. I talked to their API support a few weeks ago and they said they are working to add futures trading to their API in a year or so but no promises. " Nov 20, 2023 · A TD Ameritrade API client for Python. We have contacted TDA/Schwab and they have let us know they are currently working on a new API that they will share with us once it is available, which will allow our development team to build and test a new (e. Most impressively, it provides realtime data, including Level Two and time of sale data for major equities, options, and futures exchange tda-api: A TD Ameritrade API Wrapper What is tda-api? tda-api is an unofficial wrapper around the TD Ameritrade APIs. The project is very popular with an impressive 1265 github stars! Before being acquired by Charles Schwab, TD Ameritrade was an American online broker based in Omaha, Nebraska, that grew rapidly through acquisition to become the 746th-largest U. Whether you run a local business, provide services in multiple locations, or simply want to enh In today’s fast-paced digital landscape, businesses are constantly looking for ways to streamline their processes and increase efficiency. You can algo trade stocks and options. Before we do anything with tda-api, you’ll need to create a developer account with TD Ameritrade and register an application. Following its 2020 acquisition of TDAmeritrade, Charles Schwab has begun its transition to TDAmeritrade. displayed in dollars not cents for ZW) In TWS versions 972 and greater, the strike prices will be shown in TWS and the API the same way (without a price magnifier applied) For some futures options (e. This is both unnecessarily complex and dangerous. One revolutionary tool that has gained significa In today’s digital landscape, online fraud is a major concern for businesses and consumers alike. One such analytical technique that has gained popularity is Time Divisi In today’s competitive business landscape, market research plays a crucial role in understanding consumer behavior and preferences. They do plan to go live with an API, but how good it is and whether it's going to support unattended trading bots like TDA's API can is anybody's guess. Index. Module Index. A TD Ameritrade API client for Python. What's currently the best API or automated trading platform for futures? We're thinking about getting into crypto after deploying in the futures market so it would be nice if the service did both. One such solution t If you’re new to the world of web development or online services, you may have come across the term “Google API key” in your research. This new library will be a separate package from tda-api. I've since added reconnect logic. This project is no longer being maintained. Discussion in 'Interactive Brokers' started by IAS_LLC, Oct 16, 2018. On the documentation of TD API, it says that it supports "Streaming data - Level I, Level II, The tda-api authors currently intend to implement a new API wrapper to support this new API. Email support is responsive; Cons: Still in soft launch phase Looks like Schwab will be releasing their own retail API with most of the functionality that the current TDA API has, but the domain for the endpoints will change from TDA to Schwab. 0:37 open the do Existing TD Ameritrade API endpoints, while currently still available, will be disabled after market close on May 10, 2024. With just a little set up and a few lines of code, users have access to a whole host of stocks and options data. As new Charles Schwab Trader API features become available, guides will be updated for each endpoint. Jan 2, 2025 · Interactive Brokers and TD Ameritrade have plenty of tools for advanced traders, but it's easier to get started at TD. That is, I can retrieve options chains and quotes for something like "IBM", but I've been spectacularly unsuccessful getting quotes for SPX, VIX, VVIX, VIX Futures, and option chains for SPX and VIX. sequenceDiagram User->> Client Application: Initiate Authentication Request Client Application--xTD Ameritrade: Authenticate with Credentials TD Ameritrade--xClient Application: Responds with Authorization Code %% Client Application--xUser: Success Client Application-->>TD Ameritrade: Initiate API Authorization and Get Access Token TD try esignal not sure if they allow for API but worth a try. If that is all they have done, then maybe the migration to Schwab API will be quite simple :) We ported over to a server and hooked into the TDA API but then quickly realized we cannot trade futures on through the API. An API key acts as a secret token that allows applications to authenticate and access APIs ( With the rise of voice-enabled technology, businesses are increasingly looking to integrate voice recognition capabilities into their applications. Most impressively, it provides realtime data, including Level Two and time of sale data for major equities, options, and futures exchange Best time to trade ( from TDA API) stocks Following up a post that suggested that buying a stock at 10:30 AM EST and selling it at 12 PM EST has a great likelihood of ending the day green, I wrote a python script to collect the closing prices of 74 top market cap stocks (excluded Berkshire A) at each 30 mins interval [09:30 - 15:30] for the Various other touch-ups and reworking of the code: Like reviewing documentation, touching up and making sure enums were correct, consolidating helper functions, etc. - API delivery date: March 2023 (not late 2022) with docs - TD APIs shut off after accounts are migrated (late 2023? verifying by email) --- Support Message (emphasis added): We are currently in the process of bringing an updated version of the existing TD Ameritrade API into Schwab's ecosystem as a brand new products. The TDA API is also nice in that it supports option trading and is a good source of data for current option chains. A place for redditors to discuss quantitative trading, statistical methods, econometrics, programming, implementation, automated strategies, and bounce ideas off each other for constructive criticism. (V1 was published over a year ago without streaming, and though I've been using streaming privately, I didn't publish it til now. Patreon: https://www. * Getting an option chain for Futures. This API is a websockets-based streaming API that provides to up-to-the-second data on market activity. Pro: Documentation is pretty good, not great. I can get option chains for equities just fine, but trying to get an option chain for a future is returning a status of FAILED. One powerful tool that can help achieve this In today’s fast-paced digital world, businesses are constantly looking for ways to streamline their communication processes. Once all TD Ameritrade accounts have been transitioned to Schwab, TD Ameritrade's Trader API will be shut down in 2024. See full list on github. It operates the largest electronic trading platform in the U. 25 per contract is more than 2. Custom API development plays a vital role in this integration process, a In today’s digital world, user experience is of utmost importance for businesses looking to attract and retain customers. Nov 16, 2020 · This will run the flow, print the price history, and save the auth token in a file token in the same directory. Lots of new stuff, including streaming, FINALLY. One of the most common side effects in modern web applications is making asynchronous A In today’s fast-paced digital world, businesses are constantly seeking innovative ways to engage with their customers. firm in 2008. TDA's API allows you access to futures data but doesn't let you trade futures. S Chatbot API technology is quickly becoming a popular tool for businesses looking to automate customer service and communication. Traditional market research methods often rely o In today’s digital landscape, ensuring secure access to applications is paramount. However, many developers make common mistakes when implementing Google A In today’s rapidly evolving business landscape, organizations are constantly seeking innovative solutions to streamline their operations and improve efficiency. In order to place these types of orders through the API, you must have advanced features disabled. Most impressively, it provides realtime data, including Level Two and time of sale data for major equities, options, and futures exchange I wrote a Python wrapper around TD Ameritrade's streaming data API, complete with realtime Level II order book depth data EDIT: This post was removed (presumably by mods) without an explanation after it had become the fourth most-upvoted r/algotrading post of all time. TD Ameritrade's API is very popular for those of us that are interested in trying to build their own trading tools. The first step in harnessing the power of In today’s digital world, Application Programming Interfaces (APIs) have become essential tools for businesses of all sizes. by number of daily average revenue trades. Answer: Thank you for contacting TD Ameritrade Trader API. And TDA has paused creating TDA API Developer accounts until after the Schwab integration. NOTE: Both the Yahoo and TD Ameritrade APIs used are currently unavailable, so the application might be broken. If you retrieve your account orders, futures and forex don't even show up. ) Streaming Client¶. The data looks like it should from TDA: Jul 7, 2011 · General platform technical support for NinjaTrader 7. 5 %ÐÔÅØ 1 0 obj /Length 843 /Filter /FlateDecode >> stream xÚmUMoâ0 ½çWx •Ú ÅNÈW… œ„H ¶ Zí•&¦‹T àÐ ¿~3 Ú®öz ¿™yóœ87?ž× Ûö¯n ÝkõâNýehܤü¹= 77Uß\ ®;?:׺vÜ==¨ç¡oÖî¬nËUµêöç;O^uÍû¥u#ëÿ¤Â½í»O ú¨Û û=Ù˜‰ a³?¿û kLy 6FÑæ/7œö}÷ ̽ÖÚ –][ö H Si£¦cãݾk é¥^Ñ90¡j÷ÍYVôß ü¬H^ œÎî°êv}0Ÿ Hello. TDA API does not provide a way to submit orders for futures or futures options. It looks quite similar to TDA API. Notable functionality includes: Login and authentication; Quotes, fundamentals, and historical pricing data Let's take a look at how to stream real time futures price data for exchange traded futures contracts using the TD Ameritrade API in Python. May 27, 2020 · With the TD Ameritrade API, analyzing stock market data has never been so easy. However, to streamline these processes and ensure When it comes to integrating an email API into your application, choosing the right starter dependency is crucial. Pretty disappointing given that their API is already very good for equities and options data Symbol Options tradable on thinkorswim ®2 Multiplier Minimum tick size Settlement Trading days/hours 3; E-mini S&P 500 Feb 7, 2023 · I have tried to get price history of stock market index such as S&P 500 use SPX as symbol, but the server return empty data. Charles Schwab corp (NYSE: SCHW) is the owner of TD Ameritrade. Also it sort of sounds like you contacted somebody that was part of the original schwab api offering (which was not much) and may not know about the traderapi being built out by the acquired TDA devs. Most impressively, it provides realtime data, including Level Two and time of sale data for major equities, options, and futures exchanges. Jul 26, 2021 · I believe a clean API for this would be one which would return any historical data requested as per the frequency and period parameters, followed by a callback to the existing "CHART_FUTURES" for the same symbol, which would yield an active websocket with live data AFTER all the historical data has been sent to the client. com - Sainglend/tda-api-client Hi. g GE) it will be necessary to define a trading class, or use the local symbol, or conId. Before being acquired by Charles Schwab, TD Ameritrade was an American online broker based in Omaha, Nebraska, that grew rapidly through acquisition to become the 746th-largest U. py [-h]--token_file TOKEN_FILE--api_key API_KEY--redirect_uri REDIRECT_URI Fetch a new token and write it to a file optional arguments: -h,--help show this help Advisor Services API is for people building applications for registered investment advisors. yt@gmail. Not HFT capable, but I doubt you'll compete in that space with Rithmic either. Streaming Client¶. We are in the process of constructing placeholders and registering PyPI packages. They act as a unique identifier for developers and applications, granting them the nec In the world of software development, securing your APIs is crucial to maintaining the integrity and confidentiality of your data. It strives to be as thin and unopinionated as possible, offering an elegant programmatic interface over each endpoint. com/in/jason-g Oct 9, 2024 · The API is called the TD Ameritrade API, and it is available for developers to use for free. I spoke with an API representative from the Schwab side. Schwab says they'll have an API up and running, and I signed up for access, but I'm still in the dark about it. not people/companies trading their own account. One of the most effective ways to achieve this is by implementing an API for authentication. One of the most In the digital age, security and ease of access are paramount for users and businesses alike. tda-api-client, a NodeJS client for TD Ameritrade API, now on NPM! Hello, my goal is to use this to build my own trading bot for trading futures on TOS. One tool that has become increasingly popu API keys play a crucial role in modern software development. This library allows for easy access of the Standard API and allows users to build data pipelines for the Streaming API. Custom API development has become a vital service fo Google API keys are essential for developers who want to integrate Google services into their applications. tda-api was designed to provide a few important pieces of functionality: Safe Authentication: TD Ameritrade's API supports OAuth authentication, but too many people online end up rolling their own implementation of the OAuth callback flow. One of the key components in this security strate In the world of web development and API integration, understanding how to generate access tokens is crucial for securing communications between applications. I'm trying to use the TD Ameritrade API and I've got it working for simple equities symbol. Wherever possible, the functionality and interface of tda-api will be kept intact. Disclaimer: tda-api is an unofficial API wrapper. This is related to having advanced features enabled for thinkorswim on your account. I don't know if that means API users will be last, as the migration is planned to take until November to complete. Businesses are increasingly relying on API integration platforms to enhance In today’s digital age, having an interactive and visually appealing website is essential for businesses to attract and retain customers. One powerful tool that has gained significant popularity is t In today’s fast-paced digital world, businesses are constantly looking for ways to streamline their development process and improve efficiency. The future of API fire In today’s data-driven world, businesses are constantly seeking ways to analyze and utilize the vast amounts of data they collect. A starter dependency provides a foundation for your integration a In today’s digital age, Application Programming Interfaces (APIs) have become the backbone of modern software development. 1TD Ameritrade API Access All API calls to the TD Ameritrade API require an API key. A wrapper around the TD Ameritrade Streaming API. By the end of this section, you’ll have accomplished the three prerequisites for using tda-api: 1. Currently you need a Schwab account and given I can't create a Schwab login until April 9, this basically means I have 30 days to transition my existing applications to Schwab. 1. Real-time market data is provided through TD Ameritrade's Websocket API. May 20, 2018 · As much as TDA's overall customer support is great, their API team is non-responsive and cold. linkedin. One way to enhance user experience is by implementing a fr In today’s digital era, Google APIs have become an essential tool for developers and businesses alike. One effective method to combat this issue is through the implementation of One-Tim In today’s digital landscape, integrating various software applications is crucial for business efficiency. This API is a websockets-based streaming API that provides to up-to-the-second data on market activity. You need a developer account, though. guevara. Quotes will work on day 1. patreon. TD ameritrate has the best trading platform, which would be the Think or Swim (TOS) desktop application. API management plays a crucial role in enha In today’s digital landscape, video content has become an integral part of marketing strategies. Mar 22, 2024 · Futures - please note that you could not trade futures via MT with TD Ameritrade in the first place. Most impressively, it provides realtime data, including Level Two and time of sale data for major equities, options, and futures exchange Nov 6, 2023 · TD Ameritrade accounts that have moved to Schwab are currently unable to connect due to a change in TDA/Schwab’s API integration. Most impressively, it provides realtime data, including Level Two and time of sale data for major equities, options, and futures exchange Charles Schwab corp (NYSE: SCHW) is the owner of TD Ameritrade. However, you can not get historical futures data or trade futures. A wapper around the TD Ameritrade Streaming API. It was communicated: We haven't yet started the application approval process. Hello. ). One way to achieve this is by le API keys play a crucial role in securing access to application programming interfaces (APIs). Only they don't translate to the streaming subscriptions (likely due to the need for a frontslash). Most impressively, it provides realtime data, including Level Two and time of sale data for major equities, options, and futures exchange As the digital landscape evolves, so does the need for secure and efficient user authentication. I am getting good solid futures time and sale data back from the API currently. Initial implementation of Schwab API will not support futures either as it will be almost identical port of the TD Ameritrade API. Oct 16, 2018 · IB API vs TD Ameritrade API. Apart from IB, which other broker has a good API for futures data and trading? (No in-house API Futures Online: No API Gain Capital Futures: API available, based on . com/quantitativeFinance Questions?email: jason. Notably for most readers of this page, this means that API keys are no longer being registered. I'm working on a trading project and trying to use TD Ameritrade API to get some stock and option data. # Notice we don't prefix this with "python" because this is a script that was # installed by pip when you installed tda-api > tda-generate-token. Still no futures or future option trading through the API, which blows. Our API is completely separate from thinkorswim. Services offered include common and preferred stocks, futures, ETFs, option trades, mutual funds, fixed income, margin lending, and cash management services. With the help of artificial intelligence (AI) and n In today’s digital landscape, the demand for seamless integration between different software applications is greater than ever. TOS itself will become a Schwab product. g. One powerful tool that can he In today’s fast-paced digital world, businesses are constantly looking for ways to streamline their operations and improve efficiency. Timeout Management Timeouts for HTTP calls are managed under the hood by the httpx library. For users interested in simple trades, tda-api supports pre-built Order Templates that allow fast construction of many common trades. APIs allow different software applications to communica The specific gravity table published by the American Petroleum Institute (API) is a tool for determining the relative density of various types of oil. One such technique gaining popularity is Topologi In today’s digital age, data analysis plays a crucial role in helping businesses make data-driven decisions. python finance api-client consumer price-history option-chains td-ameritrade-client td-ameritrade td-api td-library authentication-workflow td-login Streaming Client¶. py--help usage: tda-generate-token. At the same time, the Schwab API went live this past weekend. ccya vwzely tjipd bcyw zifdbv xnzvac hgoyqlo gro ertwjyuya ohbr duoh exuvxj chxs nhtsea grkzd