close it

maybe you have used it more than the limit of the api

I also got 400 Bad Request using your code examples with my API key as well.

Either my API key is getting blocked - in which case a more specific error code would be helpful.

Or there’s something else wrong, perhaps with the Unirest library integration?

Have you got a full example in PHP that works?

I’m not familar with PHP, so test it on the mashape website, and got the 200 response:

// These code snippets use an open-source library. http://unirest.io/php
$response = Unirest\Request::post(“https://textanalysis-document-similarity-v1.p.mashape.com/document-similarity”,
array(
“X-Mashape-Key” => “…”,
“Content-Type” => “application/x-www-form-urlencoded”,
“Accept” => “application/json”
),
array(
“text1” => “Deep learning is a set of algorithms in machine learning that attempt to model high-level abstractions in data by using model architectures composed of multiple non-linear transformations.”,
“text2” => “Machine learning is a scientific discipline that explores the construction and study of algorithms that can learn from data.”
)
);

I have test it with curl, and get the 200 ok response:

curl -X POST --include ‘https://textanalysis-document-similarity-v1.p.mashape.com/document-similarity’ \

-H ‘X-Mashape-Key: YourAPIKey’
-H ‘Content-Type: application/x-www-form-urlencoded’
-H ‘Accept: application/json’
-d ‘text1=Deep learning is a set of algorithms in machine learning that attempt to model high-level abstractions in data by using model architectures composed of multiple non-linear transformations.’
-d ‘text2=Machine learning is a scientific discipline that explores the construction and study of algorithms that can learn from data.’

HTTP/1.1 200 OK
Content-Type: application/json
Date: Tue, 21 Feb 2017 02:52:30 GMT
Server: Mashape/5.0.6
Content-Length: 26
Connection: keep-alive

{
“similarity”: 0.7179
}

<?php

require_once ‘unirest-php/src/Unirest.php’;

// These code snippets use an open-source library. http://unirest.io/php

$response = Unirest\Request::post(“https://textanalysis-document-similarity-v1.p.mashape.com/document-similarity”,
array(
“X-Mashape-Key” => " — ",
“Content-Type” => “application/x-www-form-urlencoded”,
“Accept” => “application/json”
),
array(
“text1” => “Deep learning is a set of algorithms in machine learning that attempt to model high-level abstractions in data by using model architectures composed of multiple non-linear transformations.”,
“text2” => “Machine learning is a scientific discipline that explores the construction and study of algorithms that can learn from data.”
)
);

echo $response;

?>

can you give me the example you test? or you can test it on the demo first: http://documentsimilarity.com/document-similarity-demo