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Lexile Text Analyzer API
Analyzes text to produce Lexile text measures on custom content.
About the Lexile Text Analyzer API
The Lexile Text Analyzer is a utility for calculating the Lexile measure of a piece of professionally authored text. The Lexile Text Analyzer API provides this functionality as a web service that can be accessed via the Internet using a convenient API. No hardware, software, installation or ongoing management is required. This service minimizes intrusive system integration by instead relying on service-oriented architecture.

APIs
- Scoring Service API
  Assigns an ability estimate to an assessment-taker in the form of a Lexile Reading, El Sistema Reading, or Quantile measure.
- Lexile Text Analyzer API
  Analyzes text to produce Lexile text measures on custom content.
  - About the Lexile Text Analyzer API
    The Lexile Text Analyzer is a utility for calculating the Lexile measure of a piece of professionally authored text. The Lexile Text Analyzer API provides this functionality as a web service that can be accessed via the Internet using a convenient API. No hardware, software, installation or ongoing management is required. This service minimizes intrusive system integration by instead relying on service-oriented architecture.
    - Lexile Framework for Reading
      The Lexile Framework for Reading is a scientific approach for measuring both reading comprehension ability and text complexity and places both measures on the Lexile scale. When used together, these measures can help match a reader with reading material at an appropriate difficulty or help give an idea of how well a reader will comprehend a text. Students may be matched with reading material that facilitates the optimal growth in their reading comprehension ability.
  - API Calls
  - Service Level Agreement for Lexile Analyzer API
    This Service Level Agreement (this “SLA”) is provided by MetaMetrics, Inc. (“Licensor”) to each customer (“Licensee”) using Licensor’s hosted LEXILE ANALYZER API (the “Hosted Service”) under license from Licensor, and governs Licensor’s obligations regarding Licensee’s use of the Hosted Service.
- Titles API
  Access more than 470,000 hardcover, e-books, paperback, trade and other titles.
- Forecasting API
  Forecast an individual student or group performance on an upcoming assessment.
- Growth Planner API
  Plot a student's projected growth using Lexile or Quantile measures.
- Oral Reading API
  Measures a student's oral reading ability and the oral readability of text on the same scale.
- PowerV API
  Create and access vocabulary lists for over thousands of titles with the Titles Database.
- Career Database API
  Identify a career’s reading and math demands in Lexile and Quantile metrics for goal setting and career preparedness.

About the Lexile Text Analyzer API

The Lexile Text Analyzer is a utility for calculating the Lexile measure of a piece of professionally authored text. The Lexile Text Analyzer API provides this functionality as a web service that can be accessed via the Internet using a convenient API. No hardware, software, installation or ongoing management is required. This service minimizes intrusive system integration by instead relying on service-oriented architecture.

The Lexile Text Analyzer measures text by breaking down the entire piece of text and studying its characteristics, such as sentence length and word frequency, which represent the syntactic and semantic challenges that a text presents to a reader. These characteristics are used to calculate the complexity of the text and produce a Lexile text measure.

Generally, longer sentences and words of lower frequency lead to higher Lexile measures; shorter sentences and words of higher frequency lead to lower Lexile measures. Texts such as lists, recipes, poetry and song lyrics are not analyzed because they lack conventional punctuation. For more information see Lexile Framework for Reading.

For more information about Lexile measures and how measures should be reported, see Reporting Lexile Reading Measures.