Polyglot CEFR Multilingual Corpus API
1M+ verified bilingual example sentences graded by CEFR levels (A1 to C1) across Spanish, French, German, and Italian.
100 reqs/mo free. Paid plans start at $9.99/mo.
Interactive Endpoint Tester & Code SDKs
curl -X GET 'http://173.212.225.70/rapidapi/v1/corpus/sentences/search' -H 'X-RapidAPI-Key: YOUR_KEY' {
"success": true,
"cached": true,
"cache_age_seconds": 142,
"timestamp": "2026-09-23T21:00:00.000Z",
"data": [
{
"id": "us-cpi-yoy",
"event": "US CPI YoY",
"country": "US",
"currency": "USD",
"importance": "high",
"actual": 2.8,
"forecast": 2.9,
"previous": 3.0
}
]
} Dataset Highlights & Schemas
Overview
Polyglot CEFR Multilingual Corpus API provides ultra-low latency, production-grade access to normalized datasets. Engineered for automated pipelines, mobile applications, and web services.
Key Capabilities
- CEFR difficulty grading A1-C1
- Aligned bilingual translations
- Frequency-ranked headwords
- High-volume batch search
Direct RapidAPI Hub Access
Subscribe and get your live API key on RapidAPI Hub.
Predictable, Transparent Developer Pricing
Instant provisioning through RapidAPI Hub. No hidden infrastructure fees. Upgrade or cancel anytime.
Free / Hobby
Ideal for testing, hackathons, indie prototypes, and evaluating schemas.
- Access to all 46 API products (144 endpoints)
- Standard OpenAPI 3.0 schemas
- Community support & Postman collection
- L1 edge cache enabled
- RapidAPI Dashboard Analytics
Pro / Builder
Designed for production apps, commercial tools, Discord/Telegram bots, and integrations.
- Real-time streaming & low-latency edge caching
- Multi-source redundancy & auto failover
- Comprehensive B2B, Finance, Gaming & Media data
- Priority email support
- Overdraft protection ($0.001/req)
Mega / Enterprise
For high-frequency workloads, multi-tenant SaaS platforms, and enterprise workflows.
- Sub-millisecond L1 RAM cache priority
- Dedicated Slack/Discord technical channel
- 99.99% Uptime SLA guarantee
- High-throughput custom limits
- Volume discounts available