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API4AI

Cloud image processing APIs for object detection, brand and logo recognition, face analysis, background removal and more.

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More in Computer Vision APIs

Ultralytics YOLO

Open-source YOLO models and Python package for real-time object detection, segmentation, pose estimation and tracking.

Azure AI Vision

Microsoft's image analysis API for captions, tags, object detection, OCR and smart cropping.

Roboflow Inference

Open-source inference server and serverless API for running object detection, segmentation and classification models on cloud or edge devices.

OpenCV

The widely used open-source computer vision library for image processing, feature detection, video analysis and camera calibration.

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CategoryComputer Vision APIs
AuthenticationAPI key
PricingFree tier
Websitehttps://api4.ai/
Docshttps://api4.ai/docs
Last checked2026-10-14
As JSON/api/v1/directory/api4ai.json