Paraphraser API

Paraphraser API

Rewrite and enhance any sentence, paragraph, or article using AI, make it original content.
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Search engines pay great attention to original content. If your content is considered to be copied from elsewhere, this will not be good news for your site. If you copied any text from another site, you should paraphrase it and ensure it is perceived as original content by search engines.

The Paraphrasing API is a simple tool to restate any text content, or to find new ways to express individual sentences, phrases or words. Whether your goal is to scramble text content for a website, summary, business document, email or tweet, this API does the trick fast.

You may have tried using another paraphrasing software that promises great results but didn't work as expected. With the free plan, we ensure that you try before purchasing and fully satisfied.

Take the following famous speech by Martin Luther King

I have a dream that one day this nation will rise up and live out the true meaning of its creed: We hold these truths to be self-evident, that all men are created equal.

You can paraphrase it with the following cURL command:

curl --request POST \
--url '' \
--header 'apikey: YOUR API KEY' \
--data-raw "I have a dream that ... equal"

The output for this command will be as follows:

  "original": "I have a dream that one day this nation will rise up and live out the true meaning of its creed: We hold these truths to be self-evident, that all men are created equal.",
  "paraphrased": "I have a dream that one day this nation will resurrect and realize the true meaning of its beliefs: we accept these truths because all people are created equal."

Paraphraser API Reference

This API is organized around REST. Our API has predictable resource-oriented URLs, accepts form-encoded request bodies, returns JSON-encoded responses, and uses standard HTTP response codes, authentication, and verbs.

Just Getting Started?

Check out our development quickstart guide.


Paraphraser API uses API keys to authenticate requests. You can view and manage your API keys in the Accounts page.

Your API keys carry many privileges, so be sure to keep them secure! Do not share your secret API keys in publicly accessible areas such as GitHub, client-side code, and so forth.

All requests made to the API must hold a custom HTTP header named "apikey". Implementation differs with each programming language. Below are some samples.

All API requests must be made over HTTPS. Calls made over plain HTTP will fail. API requests without authentication will also fail.


Paraphrases the given text, makes it an original content.


body (required)

Text to paraphrase

Location: Body, Data Type: string

** A word enclosed with curly brackets "{ }" in the code means that it is a parameter and it should be replaced with your own values when executing. (also overwriting the curly brackets).

Below is a sample response from the endpoint

If you wish to play around interactively with real values and run code, see...

Rate Limiting

Each subscription has its own rate limit. When you become a member, you start by choosing a rate limit that suits your usage needs. Do not worry; You can upgrade or downgrade your plan at any time. For this reason, instead of starting with a larger plan that you do not need, we can offer you to upgrade your plan after you start with "free" or "gold plan" options and start using the API.

When you reach a rate limit (both daily and monthly), the service will stop responding and returning the HTTP 429 response status code (Too many requests) for each request with the following JSON string body text.

"message":"You have exceeded your daily\/monthly API rate limit. Please review and upgrade your subscription plan at https:\/\/\/subscriptions to continue."

A reminder email will be sent to you when your API usage reaches both 80% and 90%, so that you can take immediate actions such as upgrading your plan in order to prevent your application using the API from being interrupted.

You can also programmatically check your rate limit yourself. As a result of each request made to the APILayer, the following 4 fields provide you with all the necessary information within the HTTP Headers.

x-ratelimit-limit-month: Request limit per month
x-ratelimit-remaining-month: Request limit remaining this month
x-ratelimit-limit-day: Request limit per day
x-ratelimit-remaining-day: Request limit remaining today

You can contact our support unit if you need any assistance with your application regarding to handle the returned result by looking at the header information.

Error Codes

APILayer uses standard HTTP response codes to indicate the success or failure of an API request. In general: Codes in the 2xx range indicate success. Codes in the 4xx range indicate a clientside error, which means that failed given the information provided (e.g., a missing parameter, unauthorized access etc.). Codes in the 5xx range indicate an error with APILayer's servers (normally this should'nt happen at all).

If the response code is not 200, it means the operation failed somehow and you may need to take an action accordingly. You can check the response (which will be in JSON format) for a field called 'message' that briefly explains the error reported.

Status Code Explanation
400 - Bad Request The request was unacceptable, often due to missing a required parameter.
401 - Unauthorized No valid API key provided.
404 - Not Found The requested resource doesn't exist.
429 - Too many requests API request limit exceeded. See section Rate Limiting for more info.
5xx - Server Error We have failed to process your request. (You can contact us anytime)

You can always contact for support and ask for more assistance. We'll be glad to assist you with building your product.