Grammarly Upgrade & Migration

Overview

Grammarly exposes versioned APIs for writing analysis, AI detection, and plagiarism checking. Each API family versions independently — the Writing Score API may be on v2 while AI Detection remains on v1. Tracking these versions matters because Grammarly deprecates older API versions on a fixed timeline, and the response schemas differ significantly between versions (score breakdowns, suggestion categories, and confidence thresholds all change). Missing a version cutover means silent failures or degraded writing feedback quality.

Version Detection

const GRAMMARLY_BASE = "https://api.grammarly.com/ecosystem/api";

interface GrammarlyVersionMap {
  scores: string;
  aiDetection: string;
  plagiarism: string;
  latestAvailable: Record<string, string>;
}