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Sapling API

Sapling API

For clients who process high volumes of text and/or need a custom user interface.

Follow the docs to get a development key for testing, or contact us for a production key.

Integration Instructions for over 20 programming languages here:

import requests
        'key': '[API KEY]',
        'text': 'Your iphone order on the way',
        'session_id': 'demo',
  "start": 5,             // Offset of edit start
  "end": 17,              // Offset of edit end
  "replacement": "iPhone order is",
  "error_type": "VERB",   // Over 20 error types
Developed by former researchers at:

Cal Stanford Google

60% more grammar corrections

… than other systems at similar accuracy using state-of-the-art machine learning systems for natural language processing.

Low latency

Achieve the same real-time performance that users of Sapling's own interface experience.

Over 20 error types

Error categories such as preposition, noun form, and verb tense, including both high-level and fine-grained error information.

Custom models

Get corrections and edits tuned to the domain of your text—for example academic writing vs. subtitles.

Enterprise Security

Ask us about our no data retention policies, self-hosted/on-premises deployment options, and other cybersecurity policies and procedures.


Use Sapling's JavaScript or Python SDK for turnkey spelling/grammar checking and autocomplete in any web application.

Detailed API docs available.

Ready to integrate smarter corrections into your solution?

Talk with an expert