Machine Learning
fixRAgent
Triage a building maintenance photo: asset, urgency, trade to call and a line for the resident
apiKeyHTTPSCORS
Machine Learning
EU-hosted OpenAI-compatible gateway to 700+ models from 50+ providers, with free models.
Opper API is a free Machine Learning API that requires apiKey authentication, is served over HTTPS and supports CORS, so it can be called from the browser.
- Authentication
- apiKey
- HTTPS
- Yes
- CORS
- Yes
- Category
- Machine Learning
- Uptime (30 days)
- 100%
Visit documentation ↗docs.opper.ai
Online · 1242 msTested Nov 15, 2026 · checked dailyIs it down? Status & uptime
About Opper
Use the OpenAI, Anthropic, Google AI, or TypeSafe SDK against Opper by changing the base URL and API key.
- Provider
- Opper
- Website
- docs.opper.ai ↗
Details from docs.opper.ai.
Key facts
- 100% uptime (30 days)
- Callable from the browser (CORS)
- HTTPS
Unified API suite · now live
Geocode an address, validate an email, track a flight or pull stock data with one account, one dashboard and one API key.
Explore the API suite→Free tier on every API
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Opper API FAQ
Who provides the Opper API?
The Opper API is provided by Opper (docs.opper.ai). Use the OpenAI, Anthropic, Google AI, or TypeSafe SDK against Opper by changing the base URL and API key.
Is the Opper API free?
Yes. The Opper API is listed in the Machine Learning category of the public-apis directory, which only includes APIs that are free or have a free tier. Check its documentation for rate limits and paid plans.
Does the Opper API require an API key?
Yes. The Opper API uses apiKey authentication, so you need to register for credentials before making requests.
Can I call the Opper API from the browser?
Yes. The Opper API supports CORS, so front-end JavaScript can call it directly.
Does the Opper API support HTTPS?
Yes. The Opper API is served over HTTPS, so it's safe to use in production.
Maintain the Opper API? Add a badge
Show that Opper is listed on Public APIs. The badge displays its developer rating once it has one.
Markdown
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HTML
<a href="https://publicapis.lol/apis/opper"><img src="https://publicapis.lol/badge/opper.svg" alt="Opper on Public APIs" height="20"></a>