Cloudmersive Natural Language Processing

Overview

Cloudmersive NLP provides language APIs — sentiment, extraction, and POS tagging — with a free tier. Auth is an API key.

Note (verified 2026-08): our test POST to a docs-path endpoint returned 404 (endpoint paths vary — verify the current API reference). The service requires a key.

Quick Start

The APIs are grouped (endpoints vary by operation — see the Cloudmersive API reference):

curl -X POST "https://api.cloudmersive.com/nlp/v1/sentiment" \
  -H "Apikey: YOUR_KEY" \
  -H "Content-Type: application/json" \
  -d '{"text": "I love this product!"}'

{ "sentiment_score": 0.8, "sentiment_classification_result": "Positive" }

Authentication

• Register at cloudmersive.com → free API key (in the dashboard).
• Send it as the Apikey header.

Rate Limits & Notes

• Free tier: 800 calls/month across their API suite (check the dashboard); paid plans scale.
• Modules: sentiment, language detection, POS tagging, entity extraction, spell check, and more.
• All inputs are JSON POSTs; most return JSON.

FAQ

Is Cloudmersive NLP free? Free tier: 800 calls/month; more is paid.

How do I get a key? cloudmersive.com → dashboard → API key.

What’s the auth style? Apikey header.