# Grammarly

**Canonical:** https://apis.io/providers/grammarly/  
**Website:** https://www.grammarly.com  
**APIs profiled:** 5

Grammarly is an AI writing-assistance company whose enterprise developer platform exposes a set of REST APIs that bring Grammarly's writing intelligence into an organization's own applications, business-intelligence systems, and IT tooling. The Grammarly APIs cover writing-quality scoring, AI generated-content detection, plagiarism detection, communication analytics, and license management, all secured with OAuth 2.0 client credentials and scoped permissions against the base URL https://api.grammarly.com/ecosystem/api/. Certified Readability Score and Tone Analysis APIs are announced as coming soon. Grammarly was surfaced as a portfolio company of IVP.

## Kin Score — 38.0 / 100 (thin)

Scored 2026-08-30 under rubric 0.17.2. Trend: flat (+0.0 from 38.0).

| Facet | Score |
|---|---|
| Discoverability | 81.5 |
| Contract Quality | 0.0 |
| Governance | 18.2 |
| Contract Governance | 18.2 |
| Operational Transparency | 36.8 |
| Developer Ergonomics | 64.3 |
| Commercial Clarity | 50.0 |
| Access Clarity | 50.0 |

## Agent readiness — 2.5 (human-only)

| Dimension | Value |
|---|---|
| Spec Presence | no |
| Agentic Access | no |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | bearer |
| Idempotency | no |
| Error Semantics | no |
| OpenAPI Examples | no |
| Rate Limit Signal | no |
| Event Surface Described | no |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |
| Delegated Identity | no |
| Protected Resource Metadata | no |
| Dynamic Client Registration | no |
| Agentic Commerce | no |

## Access

Self-serve signup — onboarding: self-serve, pricing: unknown, trial: no (confidence: medium).

## APIs (5)

- **Grammarly Analytics API** — Programmatic access to Grammarly usage and communication-performance analytics for integration into business-intelligence systems.
- **Grammarly License Management API** — Allocate and reallocate Grammarly licenses from software asset management / IT-governance tooling.
- **Grammarly Writing Score API** — Score content on correctness, engagement, clarity, and delivery for organizational content governance (Beta).
- **Grammarly AI Detection API** — Detect AI-generated content and help demonstrate original authorship (Beta).
- **Grammarly Plagiarism Detection API** — Detect plagiarism against published sources to help teams produce original work (Beta).

## Security (4)

- **Grammarly Authentication** — oauth2 · 1 scheme
- **Grammarly Domain Security** — TLSv1.3 · DMARC
- **Grammarly Vulnerability Disclosure** — Hackerone · security.txt · contact published
- **Grammarly Trust Center** — SOC 2, ISO 27001, GDPR

## Tags

Company, Artificial Intelligence, Writing Assistance, Productivity, Natural Language Processing, Analytics, Content, Authentication, Enterprise

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/grammarly/). Scores are computed from the provider's own public artifacts under a published rubric.