The most flexible open-source data labeling platform from HumanSignal, used to fine-tune LLMs, prepare training data, and validate AI models.
URL: Visit APIs.json URL
- Type: Index
- Position: Consumer
- Access: 3rd-Party
- AI
- Annotation
- Artificial Intelligence
- Data Labeling
- LLM
- Machine Learning
- Open Source
- Created: 2025-02-08
- Modified: 2026-04-28
The Label Studio REST API supports the full data labeling lifecycle: managing projects, tasks, annotations, annotation reviews, comments, predictions, ML backends, prompts, storage (S3 / Azure / GCS), webhooks, users, organizations, and analytics. The OpenAPI 3.1 specification is published by HumanSignal at api.labelstud.io/openapi.yaml and mirrored in this repository.
Human URL: https://labelstud.io/
Base URL: https://app.humansignal.com/api
- AI
- Annotation
- Data Labeling
- LLM
- Machine Learning
- Open Source
- REST
FN: Kin Lane
Email: kin@apievangelist.com