Natural Language Processing (NLP)
Text analysis, sentiment classification, entity extraction, and translation
Natural Language Processing (NLP) API Comparison Overview
Top Endpoints| API Service | Auth Type | Rate Limit | Security | Direct Link |
|---|---|---|---|---|
| Watson Natural Language Understanding | Free Key | Değişken | HTTPS • CORS | Docs |
| Google Cloud Natural Language | Free Key | 5.000 istek/ay | HTTPS • CORS | Docs |
| Cloudmersive NLP | Free Key | 800 istek/ay | HTTPS • CORS | Docs |
| NLP Cloud | Free Key | Değişken | HTTPS • CORS | Docs |
| LibreTranslate | No Key | Sınırsız | HTTPS • CORS | Docs |
| Detect Language | Free Key | Değişken | HTTPS • CORS | Docs |
Available Endpoints (8)
Watson Natural Language Understanding
IBM Watson AI text analytics: keyword extraction, sentiment, and semantic concepts
Google Cloud Natural Language
Google Cloud NLP: entity recognition, sentiment analysis, and syntax trees
Cloudmersive NLP
Cloudmersive NLP: text translation, language detection, and sentence sentiment
NLP Cloud
High-performance transformer and spaCy NLP models for entity extraction and summarization
LibreTranslate
Free and open-source machine translation engine powered by Argos Translate
Detect Language
Detect the written language of any string of text with high precision
Lecto Translation
Fast, high-volume machine translation API supporting multiple language pairs
Perspective
Perspective API: machine learning models scoring toxicity and harassment in text
About Free Natural Language Processing (NLP) APIs
This directory curates 8 verified public APIs in the Natural Language Processing (NLP) domain. Developers can build dashboards, mobile applications, automation bots, and microservices with these ready-to-integrate endpoints without upfront billing.
Do I need an API key?
Several APIs listed here operate as Zero-Auth services where you can execute queries directly. Others provide free developer tiers with an instant key upon registration.
Does FreeAPI support CORS?
Yes, all endpoints can be called through FreeAPI Smart Edge Gateway to bypass browser CORS headers and inspect live responses.