Proofread and Grammar Check API

Text Analysis

The Proofreading and Grammar Check API ensures the provided text is grammatically correct and polished by automatically proofreading and checking for errors.

Proofread and Grammar Check API's website screenshot

About Proofread and Grammar Check API

The Proofread Text and Grammar Check API corrects grammar and spelling mistakes in submitted text, returning a fully corrected version rather than a list of individual suggestions. It is published by SharpAPI and available through ApyHub. The API takes a single content field and runs as an asynchronous job: a submit endpoint returns a job_id immediately, and a separate status endpoint is polled (at most once per second) until the job reaches a success or failed state, at which point the corrected text is returned in the result field.

Because it returns clean, ready-to-use text rather than flagged suggestions, it is suited to automated workflows without human review of each change, such as cleaning up user-generated content and reviews before publication, correcting product descriptions and CMS copy in bulk, polishing support replies and help articles, and fixing text produced by other tools or AI models before it reaches customers. It is also accessible through ApyHub MCP, allowing AI agents to proofread their own output before sending it on.

The API offers a free tier of 5 calls per day with no card required. Related services in the same catalog include a Correct Text Spelling API, a Paraphrase Text API, and a Translate Text API.

Key features

Fixes grammar and spelling mistakes in text and returns the fully corrected version
Async job-based API: submit text, poll job status, retrieve corrected result
Accessible via ApyHub MCP so AI agents can proofread their own output
Playground for testing text directly before committing to the API
Related endpoints for spelling-only correction, paraphrasing, and translation

Frequently asked questions

Is there a free tier?

Yes, you can start for free with 5 API calls a day and no card required.

How does the API return results — a list of suggestions or corrected text?

It returns the fully corrected text rather than a list of individual suggestions, which makes it suited for automated workflows.

How do I use the API — is it synchronous?

No, proofreading runs as an async job: you submit content to get a job_id, then poll the status endpoint (at most once per second) until it returns success with the corrected result.

What input does the endpoint require?

It takes a single field, content, containing the text to be proofread.

Can AI agents use this API?

Yes, the API is available through ApyHub MCP, allowing AI agents to proofread their own output before sending it on.

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