Sapling Logo
Sapling Logo API

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

Use the Sapling dashboard to get a development key for testing, or contact us for a production key.

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", // Suggested replacement
    "error_type": "VERB",             // Over 20 error categories
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.

  Over 20 error types

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

  Enterprise Security

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

  Low latency

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

  Custom models

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


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

Detailed API docs available.