Grammarly API (2026): Complete Developer Guide

1) What is the Grammarly API?

In 2026, “Grammarly API” most often means Grammarly’s organization-focused REST APIs (documented at developer.grammarly.com) for Grammarly Enterprise / Grammarly for Education customers. These APIs help organizations integrate Grammarly capabilities into internal systems for governance, analytics, and workflow automation.

• Writing Score API: evaluate document quality and return overall + category scores.
• Analytics API: export usage and impact metrics into BI systems.
• License Management API: manage seats, utilization, and deprovisioning workflows.
• AI Detection API (beta): authenticity signal via create → upload → poll.
• Plagiarism Detection API (beta): originality checks via create → upload → poll.

2) Who can use Grammarly’s APIs?

Grammarly’s API access is typically provisioned for organizations with Grammarly Enterprise or institution-wide Grammarly for Education licensing. Admins create OAuth credentials and enable/scopes the APIs their org uses.

3) Authentication: OAuth 2.0 credentials + access tokens

Grammarly APIs use OAuth 2.0 with a server-to-server pattern:

1. Create Client ID and Client Secret (admin-provisioned).
2. Request an access token from Grammarly’s OAuth server.
3. Call Grammarly APIs using Authorization: Bearer <token>.

4) Quickstart: your first API request

The “happy path” is: request an OAuth token via client_credentials then call an API endpoint with Bearer auth.

# Token request (application/x-www-form-urlencoded)
POST https://auth.grammarly.com/v4/api/oauth2/token

grant_type=client_credentials
&client_id=YOUR_CLIENT_ID
&client_secret=YOUR_CLIENT_SECRET
&scope=YOUR_SCOPES

# Then call any API endpoint:
Authorization: Bearer <access_token>

You’ll reuse this same pattern for Analytics, Licensing, Scoring, and beta Authenticity APIs.

5) Core Grammarly API surfaces (2026)

Below is a developer-first breakdown: what each API is for, the common workflow pattern, and what to design around.

5.1 Analytics API

Use analytics to answer: Who is using Grammarly? Which teams adopted it? Is adoption improving? What’s the impact? The most reliable approach is to pull analytics daily into a warehouse and build dashboards on top of that dataset.

5.2 License Management API

License governance is where you often recover the most budget. Automate reclaiming inactive seats, align access to HR joiner/mover/leaver events, and export utilization to procurement.

5.3 Writing Score API

Writing Score helps you quantify quality across programs or workflows. Use it for enablement baselines, support QA, content standards, or education programs.

5.4 AI Detection API (Beta)

AI detection is probabilistic. Design it as a workflow signal (with human review), not as an absolute verdict. Typical pattern: create a score request, upload the file to a pre-signed URL, then poll until completed.

5.5 Plagiarism Detection API (Beta)

Plagiarism detection is similarly workflow-oriented. Build it into content pipelines or education workflows with careful governance, logging, and retention controls.

6) Production architectures (reference designs)

Design A: Grammarly Gateway Service (recommended)

Client apps → your backend gateway → Grammarly APIs

• Centralize token acquisition + caching
• Apply RBAC, quotas, and policy checks
• Standardize logs + audit trails
• Implement retries/backoff and rate limiting

Design B: Batch pipelines for BI and governance

Pull Analytics and License data into a warehouse nightly/hourly. Dashboards read warehouse tables rather than calling APIs directly.

Design C: Workflow integration (human-in-the-loop)

Integrate scoring/detection into CMS, support tooling, or portals with explicit review steps to prevent brittle automation.

7) Python examples (requests templates)

7.1 Get an OAuth access token

import os
import requests

TOKEN_ENDPOINT = "https://auth.grammarly.com/v4/api/oauth2/token"
CLIENT_ID = os.environ["GRAMMARLY_CLIENT_ID"]
CLIENT_SECRET = os.environ["GRAMMARLY_CLIENT_SECRET"]

def get_access_token(scope: str) -> str:
    resp = requests.post(
        TOKEN_ENDPOINT,
        data={
            "grant_type": "client_credentials",
            "client_id": CLIENT_ID,
            "client_secret": CLIENT_SECRET,
            "scope": scope,
        },
        timeout=30,
    )
    resp.raise_for_status()
    return resp.json()["access_token"]

7.2 Analytics users export (cursor + date window)

import requests

def fetch_analytics_users(token: str, date_from: str, date_to: str, limit: int = 200, cursor: str | None = None):
    url = "https://api.grammarly.com/ecosystem/api/v2/analytics/users/"
    params = {"date_from": date_from, "date_to": date_to, "limit": limit}
    if cursor:
        params["cursor"] = cursor

    resp = requests.get(
        url,
        headers={"Authorization": f"Bearer {token}"},
        params=params,
        timeout=60,
    )
    resp.raise_for_status()
    return resp.json()

7.3 License management: list and remove

import requests

def list_users(token: str, limit: int = 100, cursor: str | None = None):
    url = "https://api.grammarly.com/ecosystem/api/v1/users"
    params = {"limit": limit}
    if cursor:
        params["cursor"] = cursor

    resp = requests.get(url, headers={"Authorization": f"Bearer {token}"}, params=params, timeout=60)
    resp.raise_for_status()
    return resp.json()

def remove_user(token: str, user_id: int):
    url = f"https://api.grammarly.com/ecosystem/api/v1/users/{user_id}"
    resp = requests.delete(url, headers={"Authorization": f"Bearer {token}"}, timeout=60)
    if resp.status_code not in (200, 204):
        resp.raise_for_status()

7.4 AI Detection (Beta): create → upload → poll

import time
import requests

BASE = "https://api.grammarly.com/ecosystem/api/v1/ai-detection"

def create_request(token: str, filename: str) -> dict:
    resp = requests.post(
        BASE,
        headers={"Authorization": f"Bearer {token}", "Accept": "application/json"},
        json={"filename": filename},
        timeout=30,
    )
    resp.raise_for_status()
    return resp.json()  # score_request_id + file_upload_url

def upload(file_upload_url: str, path: str):
    with open(path, "rb") as f:
        resp = requests.put(file_upload_url, data=f, timeout=60)
    resp.raise_for_status()

def poll(token: str, score_request_id: str) -> dict:
    url = f"{BASE}/{score_request_id}"
    resp = requests.get(url, headers={"Authorization": f"Bearer {token}", "Accept":"application/json"}, timeout=30)
    resp.raise_for_status()
    return resp.json()

# created = create_request(token, "example.docx")
# upload(created["file_upload_url"], "/path/to/example.docx")
# for _ in range(30):
#     s = poll(token, created["score_request_id"])
#     if s.get("status") == "COMPLETED":
#         print(s)
#         break
#     time.sleep(2)

8) Pagination, date windows, and constraints

• Cursor pagination: store and resume with next_cursor.
• Date windows: analytics is typically bounded and may lag; warehouse ETL avoids “today data” surprises.
• Async workflows: authenticity APIs often require create/upload/poll; add backoff and limit polling frequency.

9) Security & compliance checklist

10) Grammarly API pricing: the reality check

“Grammarly API pricing” is often not a simple public per-call meter. Grammarly’s documented APIs are aligned with organization licensing and enterprise terms, so practical budgeting usually focuses on:

• Seat counts and utilization (governance + reclaim inactive seats)
• Adoption and impact (analytics export into BI)
• Policy and scope (who can score, which workflows are allowed)

Grammarly API Pricing - How it actually works

Most people search “Grammarly API pricing” expecting a simple pay-as-you-go price table. In practice, Grammarly’s official APIs are primarily organization / enterprise integrations (Analytics, License Management, Writing Score, and beta Authenticity APIs). Access is typically tied to Grammarly Enterprise or Grammarly for Education licensing rather than a public “per-call” developer meter.

Grammarly API key: what it is (and how auth works)

A “Grammarly API key” usually refers to OAuth credentials (Client ID + Client Secret) used to obtain an access token. You authenticate by requesting an Access Token from Grammarly’s OAuth server and then calling APIs with a Bearer token.

POST https://auth.grammarly.com/v4/api/oauth2/token
grant_type=client_credentials
client_id=...
client_secret=...
scope=...

Authorization: Bearer <access_token>

Grammarly API free: is there a free tier?

If someone searches “Grammarly API free”, they often mean “Can I call Grammarly’s API for free?” The realistic answer is:

• Grammarly’s consumer product has free usage options.
• Grammarly’s official enterprise APIs are designed for organizations and usually require admin OAuth credentials and appropriate licensing.
• For API-level integrations, you should assume it’s part of an organization plan/contract rather than unlimited free usage.

Grammarly API documentation: where to start (official)

When users search “Grammarly API documentation,” point them to these doc areas:

Grammarly API example: “first request” flow + practical use cases

The core sequence is: request an OAuth token → call an API endpoint (Analytics, License Management, Writing Score, etc.).

Grammarly API reddit: what people usually mean (and how to handle it)

When users search “Grammarly API reddit,” they’re often trying to answer questions like:

• “Is there a public Grammarly API for grammar checking?”
• “Can I integrate Grammarly into my app like an SDK?”
• “Why can’t I find simple pricing / keys like other APIs?”

Grammarly API alternative: best options (by use case)

If your reader’s real goal is “grammar check + corrections via API” (classic Grammarly-like behavior), here are practical alternatives you can mention:

What Grammarly API is best at (and what it isn’t)

Grammarly’s official APIs are enterprise/organization APIs aimed at governance + measurement + evaluation, not a simple public endpoint that does “send text → return corrected text”.

Head-to-head: Grammarly vs competitors (by use case)

Pricing model differences (how you’ll be billed)

11) Troubleshooting

12) FAQ (high-intent)