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.