# Label Studio **Canonical:** https://apis.io/providers/label-studio/ **Website:** https://labelstud.io/ **APIs profiled:** 74 Label Studio is the most flexible open-source data labeling platform from HumanSignal, used to fine-tune LLMs, prepare training data, and validate AI models. The Label Studio REST API exposes projects, tasks, annotations, predictions, storage, webhooks, prompts, and review workflows. ## Kin Score — 35.9 / 100 (thin) Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+1.9 from 34.0). | Facet | Score | |---|---| | Discoverability | 75.9 | | Contract Quality | 50.5 | | Governance | 0.0 | | Contract Governance | 0.0 | | Operational Transparency | 23.7 | | Developer Ergonomics | 26.2 | | Commercial Clarity | 36.8 | | Access Clarity | 36.8 | ## Agent readiness — 34.1 (agent-ready) | Dimension | Value | |---|---| | Spec Presence | yes | | Agentic Access | derived | | Reversibility Documented | documented | | MCP Server | no | | Auth Clarity | yes | | Idempotency | no | | Error Semantics | no | | OpenAPI Examples | partial | | Rate Limit Signal | documented | | Event Surface Described | no | | Agent Skills | no | | Well Known Catalog | no | | Consent Identity | no | | Agent Card | no | | Dry Run Mode | no | ## Access Freemium · Self-serve signup — onboarding: self-serve, pricing: freemium, trial: no (confidence: high). ## APIs (74) - **Label Studio subpackage_actions API** — The subpackage_actions API from Label Studio — 1 operation(s) for subpackage_actions. - **Label Studio subpackage_activityLogs API** — The subpackage_activityLogs API from Label Studio — 1 operation(s) for subpackage_activitylogs. - **Label Studio subpackage_annotationHistory API** — The subpackage_annotationHistory API from Label Studio — 3 operation(s) for subpackage_annotationhistory. - **Label Studio subpackage_annotationReviews API** — The subpackage_annotationReviews API from Label Studio — 2 operation(s) for subpackage_annotationreviews. - **Label Studio subpackage_annotations API** — The subpackage_annotations API from Label Studio — 4 operation(s) for subpackage_annotations. - **Label Studio subpackage_billing API** — The subpackage_billing API from Label Studio — 1 operation(s) for subpackage_billing. - **Label Studio subpackage_comments API** — The subpackage_comments API from Label Studio — 3 operation(s) for subpackage_comments. - **Label Studio subpackage_dimensions API** — The subpackage_dimensions API from Label Studio — 5 operation(s) for subpackage_dimensions. - **Label Studio subpackage_exportStorage API** — The subpackage_exportStorage API from Label Studio — 1 operation(s) for subpackage_exportstorage. - **Label Studio subpackage_exportStorage.subpackage_exportStorage/azure API** — The subpackage_exportStorage.subpackage_exportStorage/azure API from Label Studio — 4 operation(s) for subpackage_exportstorage.subpackage_exportstorage/azure. - **Label Studio subpackage_exportStorage.subpackage_exportStorage/azureSpi API** — The subpackage_exportStorage.subpackage_exportStorage/azureSpi API from Label Studio — 4 operation(s) for subpackage_exportstorage.subpackage_exportstorage/azurespi. - **Label Studio subpackage_exportStorage.subpackage_exportStorage/databricks API** — The subpackage_exportStorage.subpackage_exportStorage/databricks API from Label Studio — 4 operation(s) for subpackage_exportstorage.subpackage_exportstorage/databricks. - **Label Studio subpackage_exportStorage.subpackage_exportStorage/gcs API** — The subpackage_exportStorage.subpackage_exportStorage/gcs API from Label Studio — 4 operation(s) for subpackage_exportstorage.subpackage_exportstorage/gcs. - **Label Studio subpackage_exportStorage.subpackage_exportStorage/gcsSa API** — The subpackage_exportStorage.subpackage_exportStorage/gcsSa API from Label Studio — 4 operation(s) for subpackage_exportstorage.subpackage_exportstorage/gcssa. - **Label Studio subpackage_exportStorage.subpackage_exportStorage/gcswif API** — The subpackage_exportStorage.subpackage_exportStorage/gcswif API from Label Studio — 4 operation(s) for subpackage_exportstorage.subpackage_exportstorage/gcswif. - **Label Studio subpackage_exportStorage.subpackage_exportStorage/local API** — The subpackage_exportStorage.subpackage_exportStorage/local API from Label Studio — 4 operation(s) for subpackage_exportstorage.subpackage_exportstorage/local. - **Label Studio subpackage_exportStorage.subpackage_exportStorage/redis API** — The subpackage_exportStorage.subpackage_exportStorage/redis API from Label Studio — 4 operation(s) for subpackage_exportstorage.subpackage_exportstorage/redis. - **Label Studio subpackage_exportStorage.subpackage_exportStorage/s3 API** — The subpackage_exportStorage.subpackage_exportStorage/s3 API from Label Studio — 4 operation(s) for subpackage_exportstorage.subpackage_exportstorage/s3. - **Label Studio subpackage_exportStorage.subpackage_exportStorage/s3S API** — The subpackage_exportStorage.subpackage_exportStorage/s3S API from Label Studio — 4 operation(s) for subpackage_exportstorage.subpackage_exportstorage/s3s. - **Label Studio subpackage_files API** — The subpackage_files API from Label Studio — 3 operation(s) for subpackage_files. - **Label Studio subpackage_importStorage API** — The subpackage_importStorage API from Label Studio — 1 operation(s) for subpackage_importstorage. - **Label Studio subpackage_importStorage.subpackage_importStorage/azure API** — The subpackage_importStorage.subpackage_importStorage/azure API from Label Studio — 4 operation(s) for subpackage_importstorage.subpackage_importstorage/azure. - **Label Studio subpackage_importStorage.subpackage_importStorage/azureSpi API** — The subpackage_importStorage.subpackage_importStorage/azureSpi API from Label Studio — 4 operation(s) for subpackage_importstorage.subpackage_importstorage/azurespi. - **Label Studio subpackage_importStorage.subpackage_importStorage/databricks API** — The subpackage_importStorage.subpackage_importStorage/databricks API from Label Studio — 4 operation(s) for subpackage_importstorage.subpackage_importstorage/databricks. - **Label Studio subpackage_importStorage.subpackage_importStorage/gcs API** — The subpackage_importStorage.subpackage_importStorage/gcs API from Label Studio — 4 operation(s) for subpackage_importstorage.subpackage_importstorage/gcs. - **Label Studio subpackage_importStorage.subpackage_importStorage/gcsSa API** — The subpackage_importStorage.subpackage_importStorage/gcsSa API from Label Studio — 4 operation(s) for subpackage_importstorage.subpackage_importstorage/gcssa. - **Label Studio subpackage_importStorage.subpackage_importStorage/gcswif API** — The subpackage_importStorage.subpackage_importStorage/gcswif API from Label Studio — 4 operation(s) for subpackage_importstorage.subpackage_importstorage/gcswif. - **Label Studio subpackage_importStorage.subpackage_importStorage/local API** — The subpackage_importStorage.subpackage_importStorage/local API from Label Studio — 4 operation(s) for subpackage_importstorage.subpackage_importstorage/local. - **Label Studio subpackage_importStorage.subpackage_importStorage/redis API** — The subpackage_importStorage.subpackage_importStorage/redis API from Label Studio — 4 operation(s) for subpackage_importstorage.subpackage_importstorage/redis. - **Label Studio subpackage_importStorage.subpackage_importStorage/s3 API** — The subpackage_importStorage.subpackage_importStorage/s3 API from Label Studio — 4 operation(s) for subpackage_importstorage.subpackage_importstorage/s3. - **Label Studio subpackage_importStorage.subpackage_importStorage/s3S API** — The subpackage_importStorage.subpackage_importStorage/s3S API from Label Studio — 4 operation(s) for subpackage_importstorage.subpackage_importstorage/s3s. - **Label Studio subpackage_jwtSettings API** — The subpackage_jwtSettings API from Label Studio — 1 operation(s) for subpackage_jwtsettings. - **Label Studio subpackage_ml API** — The subpackage_ml API from Label Studio — 6 operation(s) for subpackage_ml. - **Label Studio subpackage_modelProviders API** — The subpackage_modelProviders API from Label Studio — 3 operation(s) for subpackage_modelproviders. - **Label Studio subpackage_organizations API** — The subpackage_organizations API from Label Studio — 4 operation(s) for subpackage_organizations. - **Label Studio subpackage_organizations.subpackage_organizations/invites API** — The subpackage_organizations.subpackage_organizations/invites API from Label Studio — 3 operation(s) for subpackage_organizations.subpackage_organizations/invites. - **Label Studio subpackage_organizations.subpackage_organizations/members API** — The subpackage_organizations.subpackage_organizations/members API from Label Studio — 2 operation(s) for subpackage_organizations.subpackage_organizations/members. - **Label Studio subpackage_organizations.subpackage_organizations/memberTags API** — The subpackage_organizations.subpackage_organizations/memberTags API from Label Studio — 5 operation(s) for subpackage_organizations.subpackage_organizations/membertags. - **Label Studio subpackage_organizations.subpackage_organizations/memberTags.subpackage_organizations/memberTags/bulk API** — The subpackage_organizations.subpackage_organizations/memberTags.subpackage_organizations/memberTags/bulk API from Label Studio — 1 operation(s) for subpackage_organizations.sub... - **Label Studio subpackage_organizations.subpackage_organizations/permissions API** — The subpackage_organizations.subpackage_organizations/permissions API from Label Studio — 3 operation(s) for subpackage_organizations.subpackage_organizations/permissions. - …and 34 more, listed in full on the page. ## Agentic access (1) - **Label Studio Agentic Access** — 400 operations · 233 acting · 9 human-in-the-loop ## Security (2) - **Label Studio Authentication** — apiKey · 1 scheme - **Label Studio Domain Security** — TLSv1.3 · HSTS · DMARC ## Plans (1) - **Label Studio Plans Pricing** ## Tags Artificial Intelligence, Annotation, Data Labeling, LLM, Machine-Learning, Open-Source --- Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/label-studio/). Scores are computed from the provider's own public artifacts under a published rubric.