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Most of the API features are accessed via simple HTTP GET requests.
Requests that require detailed input, such as an order to buy or sell stock, use an HTTP POST request, with the parameters included as either XML or JSON data. The HTTP DELETE request is also used, with one API, to delete messages after they have been read. Although most of the platform uses a RESTful request-response model, a streaming API is also provided, so that an application can receive timely "push" notifications of order status changes.
For your application to do this, even for testing purposes, requires an OAuth consumer key - a code that uniquely identifies the application i. We support two levels of consumer key. An individual key is tied to a single user ID, and allows access for only that user. This is appropriate for developing applications for personal use, or for the early stages of a larger development effort.
A vendor key, on the other hand, permits access by multiple users and is appropriate for applications that may be widely distributed.
Note that separate keys are required for accessing "sandbox" data used for development and testing purposes versus actual production data. For this reason, a typical developer has at least two consumer keys. You will also need the account so that you can log in and use your application. It can be a personal, professional, or corporate account. If you don't have one, you can quickly set one up online at http: For development purposes, it is not necessary to fund the account, but to do any actual trading will require funds.
When you are logged in to your account, request a consumer key via a secure message on this page: You may also want to request that your user account be approved as a non-funded account, so that you're not required to have funds in the account to keep it open.
Within a few business days, a sandbox consumer key will be sent back to you by secure message, along with a Developer Agreement which you will need to review and sign.
When we've received your agreement and processed your request, we'll issue you a production consumer key. When you get the key, you will be notified of its scheduled expiration date - typically, two years from its creation date. Attempting to use an individual key with a different user account will result in an error. You may find answers there to technical problems or design challenges.
Most of the platform services are REST APIs that provide information such as account lists, quotes, and alerts, or functionality such as the ability to submit trade orders. Since the API is RESTful, it is easy to integrate into your application statelessly, without complex session management, and it flexibly delivers data in either JSON or XML format.
In addition, the platform supports a streaming API that lets you subscribe to timely "push" notifications of order status updates.
Previous versions of the API are not revised except in the case of critical bug fixes. In version v0, most of the REST API calls are GETs, some are POSTs, and one call uses a DELETE to delete a message.
In most of these, the URL has very similar syntax. After the host etws. There may be path parameters MSFT in this example. At the end of the path, ". Finally, some APIs use query parameters, such as the detailFlag parameter shown here. Path parameters MSFT and query parameters are not case-sensitive. The URL path for the sandbox environment is slightly different.
Details can be found in our Sandbox documentation. Responses use XML format by default. To receive JSON instead of XML, add ". Our API documentation is organized into groups based on API modules. Within the modules, each API is detailed separately. The following information is typically provided:.
In-depth topics such as authorization , the sandbox test environment , system messages , and rate limits are discussed separately in Developer Guide articles. If parameters must contain one of a specific set of values, the table lists the possible values and the default value i. This documentation assumes that the developer is familiar with trading concepts and market terminology.
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Dates and times are all US Eastern Time. Most times and dates in API responses are represented as epoch time, i. Follow the instructions under Authorization above to get a consumer key so you can access the platform and run the tutorial. You should receive a sandbox key and Developer Agreement within a few business days. We recommend starting with the developer guides for authorization and the sandbox. Then familiarize yourself with the APIs.
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And no matter what language you're using, you may appreciate the simple Java tutorial , which demonstrates getting authorized and requesting account data. Finally, you may find valuable ideas and information at our News page or our online Developer Community. Please see the Application Programming Interface License Agreement and the Application Programming Interface User Agreement for more information. System response and account access times may vary due to a variety of factors, including trading volumes, market conditions, system performance, and other factors.
Developers and users are asked to sign several types of agreements: The original platform version is designated as version 0 or "v0". The APIs are organized into modules as shown in the table below.
The module names are used as part of the API syntax, and the same modules are used to organize the API documentation.
APIs that use HTTP POST will accept data in either XML or JSON format. The following information is typically provided: In this documentation, request parameters are shown in tables that indicated whether each parameter is required always present , conditional present under certain circumstances , or optional decided by the developer.
Responses are XML or JSON structures, and some properties of the response may be complex , meaning that they are parents of sub-properties. In tables that describe these complex structures, sub-properties are shown indented under the parent, as shown below.
Consumer keys We support two levels of consumer key. State that you are requesting a consumer key Explain the type of application you are developing Specify whether you want an individual or vendor key You may also want to request that your user account be approved as a non-funded account, so that you're not required to have funds in the account to keep it open.
Agreements Developers and users are asked to sign several types of agreements: API Agreement - As a developer, you are asked to sign an API agreement before you will be issued a consumer key for production data. RTQ Agreement - As a user, you must sign the Real-Time Quote Agreement before you can access data with the quote API. You can do this at http: Extended-hours Agreement - As a user, you must sign the Extended-Hours Disclosure Agreement before you can perform after-hours trading if the application supports this feature.
About the API Most of the platform services are REST APIs that provide information such as account lists, quotes, and alerts, or functionality such as the ability to submit trade orders.
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API Modules The APIs are organized into modules as shown in the table below. Get Request Token , Authorize Application , Get Access Token , Renew Access Token , Revoke Access Token. Get information on the user's accounts, including transaction histories, as well as any alerts for the user trade executions, order expirations, bill payments, etc. List Accounts , Get Account Balance , Get Account Positions , List Alerts , Read Alert , Delete Alert , Get Transaction History , Get Transaction Detail.
Look up symbols and company information, get quotes, fundamentals, and performance history, and build option tables. Get Option Chains , Get Option Expiration Dates , Look Up Product , Get Quote. List Orders , Cancel Order , Preview Equity Order , Place Equity Order , Preview Equity Order Change , Place Equity Order Change , Preview Option Order , Place Option Order , Preview Option Order Change , Place Option Order Change.
Subscribe to receive timely push notifications of order status changes - fulfillment, cancellation, etc. See Streaming API documentation. Check the API rate limits and see how many requests are still available in the current time interval.