Grammarly API

What is Grammarly API?

The Grammarly API is a set of HTTP REST interfaces that bring Grammarly's AI writing capabilities and admin controls into your own applications. Developer documentation describes a Writing Score API that returns scores for submitted text, such as clarity and engagement, an Analytics API that returns per-user usage like active days, writing sessions, the share of sessions that improved and generative AI prompt counts, and a License Management API that lists users and invitees and removes inactive people from a subscription. Access uses OAuth 2.0: an admin creates credentials in the Admin panel, picks scopes such as scores-api:read or analytics-api:read, and exchanges the client ID and secret for an access token. Typical uses include scoring documents at scale, setting quality thresholds in business processes, feeding Grammarly analytics into BI tools and automating license clean-up. Credentials can be created by admins on Grammarly Enterprise or on institution-wide Grammarly for Education licenses, and the docs say to contact sales if you are not yet a customer.

Use cases

• Score documents for writing quality at scale
• Set quality thresholds in business workflows
• Send Grammarly usage data to BI dashboards
• Reclaim inactive Grammarly licenses
• List users and pending invitees
• Detect AI-generated content in your own apps

Who it's for

• Enterprise IT admins
• Developers
• Education administrators
• Business intelligence teams

Why use Grammarly API

• Lets you score or review writing programmatically instead of relying only on the editor apps.
• Usage statistics can flow into the BI tools your team already uses to measure adoption.
• Automating license removal helps IT teams free up unused seats, for example after 90 days of inactivity.
• Scoped OAuth credentials limit each integration to only the access it needs.
• A plain REST interface works from any language that can send HTTP requests.

Grammarly API features

• Writing Score API for clarity and engagement scores
• Analytics API with days active, session counts and prompt counts
• License Management API for users and invitees
• Removal of users from a subscription
• Paginated results with limit and cursor parameters
• OAuth 2.0 client credentials with scoped access
• Scopes for scores, analytics and user read or write access
• Analytics data available for 365 days with a two-day lag
• HTTP REST interface usable from curl or Python

Grammarly API integrations

• OAuth 2.0
• Software asset management tools
• Business intelligence systems

How to get started with Grammarly API

1. As a Grammarly admin, open the Admin panel and go to OAuth 2.0 credentials under Organization.
2. Add a credential, name it, select the API you need and copy the Client ID and Secret.
3. Request an access token from Grammarly's OAuth server with the client credentials and the scopes you need.
4. Call the Writing Score, Analytics or License Management endpoints with the bearer token.
5. Page through results with the cursor and store or act on the data in your own systems.

Grammarly API limitations

• OAuth credentials are issued to admins with Grammarly Enterprise or Grammarly for Education institution-wide licenses
• Admin licenses cannot be removed through the License Management API
• Analytics requests are capped at 400 entries and cover at most one year back
• No pricing is published for the API; the pricing page returned an error

Grammarly API pricing

Grammarly API is sold on custom quotes, so its prices aren't published.

Prices can change and may vary by country or exclude tax. Check the official pricing page.

Grammarly API alternatives

The main Grammarly API alternatives listed on Debuly are GPTZero, CAJAL, LogicBalls, Originality.ai, Phrase and DeepL API. The table compares pricing and platforms; order is A–Z.

1. CA

   CAJAL

   Open-source local scientific paper generator that drafts academic papers offline and has AI judges review them.

   WritingResearch and searchDeveloper platforms
   Open sourceVisit CAJAL (official site)
2. 

   DeepL API

   REST API for DeepL machine translation, writing improvement and voice translation, with a free Developer plan and usage-based Growth plan.

   WritingDeveloper platformsProductivity
   FreemiumVisit DeepL API (official site)
3. 

   GPTZero

   AI content detector that checks whether text was written by a person or a model, with sentence-level highlights and writing reports.

   WritingProductivityDeveloper platforms
   FreemiumVisit GPTZero (official site)
4. 

   LogicBalls

   AI writing and chat platform with thousands of task-specific tools that ask clarifying questions before they generate text.

   WritingChat assistantsMarketing and SEO
   FreemiumVisit LogicBalls (official site)
5. 

   Originality.ai

   AI content detector and plagiarism checker with fact, grammar and readability checks for publishers, agencies, writers and schools.

   WritingMarketing and SEOResearch and search
   FreemiumVisit Originality.ai (official site)
6. 

   Phrase

   Localization platform with translation management, software localization, AI machine translation and workflow automation for enterprise teams.

   WritingDeveloper platformsAutomation and agents
   Contact salesVisit Phrase (official site)

Grammarly API FAQ

Sources & verification

Facts on this page come from the official sources below, each with the date we read it. Written by Debuly; the vendor did not review this page.

Image credits

• Logo: from developer.grammarly.com · fetched 23 Oct 2026 · Vendor trademark, used only to identify the product; removed on request
• Cover: none collected yet, so a generated tile is shown.

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