Kid Smart AI Fluency Assessment API offers compatible results with SoapBox Labs API output. 

Change one line of code from https://api.soapboxlabs.com/v1/async/request/speech/fluency
to
https://api.kidsmart.ai/v1/audio/fluency

Then get results that are SoapBox compatible:

See our playground.kidsmart.ai for a demo of our technology if you have reading assessments on hand. We also provide assessment examples in different environments.

Identical Inputs:

Fluency Inputs Comparison
Description Kid Smart AI Fluency Inputs SoapBox Labs Fluency Inputs
The audio file to be analyzed file file
The reference text against which the speech contained in the audio file should be analyzed reference_text reference_text
A unique ID that represents the speaker in the audio file. user_token user_token
The alphanumeric ID of the model. model_id model_id

Identical & Improved Outputs:

Fluency Outputs Comparison
Description Kid Smart AI Fluency Outputs SoapBox Labs Fluency Outputs
The user_id specified in the request user_id user_id
The language contained in the audio file being analyzed language_code language_code
A unique identifier for the request result_id result_id
The UTC time the request was processed at time time
The duration of the audio file in seconds. At Kid Smart AI, this is the number of seconds you are charged for. audio_duration audio_duration
Timestamp of first word of the assessment assessStartTime N/A
Timestamp of the last word of the assessment assessEndTime N/A
The Fluency results object returned (see below) results results
The number of differences between the reference and transcription text. results.num_differences results.num_differences
The number of times a word has been substituted for another. results.substitution_count results.substitution_count
The number of times a word has been inserted. results.insertion_count results.insertion_count
The number of times the child correctly said a word from the reference text. results.correct_count results.correct_count
The number of times a word from the reference text was not said. results.deletion_count results.deletion_count
The text that is expected to be read. N/A results.reference_text
A breakdown of the individual words. results.text_score results.text_score
The computed transcription from the audio file. N/A results.transcription
The number of words in the reference_text. results.word_count results.word_count
The number of times the child repeated a word. results.repetition_count results.repetition_count
Optional input for SoapBox Labs API. Not necessary for Kid Smart AI N/A results.last_word
Number of correct words read per minute (words per minute) results.WPM N/A
Number of words read correctly divided by total number of words, times 100 (percentage) results.accuracy_score N/A

See our API Docs for more information: Kid Smart AI Fluency API Docs