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Label Studio

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.

agent aware

Real signal across most facets with visible, nameable gaps — the contract exists but is thin, or the portal is good while governance and commercial terms are absent.

Kin Score

API Evangelist profiles Label Studio the way a machine reads it — 154 machine-readable artifacts across 1 API, pulled from the provider's own public surface and indexed so a developer, an analyst, or an AI agent can evaluate it against every other provider on the network.

Every provider in the network is reduced to the same set of machine-readable artifacts — OpenAPI contracts, event specifications, GraphQL schemas, runnable collections, pricing and rate-limit signals, security posture, OAuth scopes, and the agent surfaces (MCP servers and skills) that let software drive the API on its own. We profile them because the interface is the part of a company you can actually inspect: it is a truer signal of what a provider does than any marketing page. From those artifacts we compute the Kin Score — Label Studio scores 43.2/100 (developing), with a separate agent-readiness read of 24/100 (agent aware). The full breakdown is below, followed by every artifact we hold — each card links through to its machine-readable definition on apis.io.

Kin Score

This is the API Evangelist rating — a single, repeatable read computed from the artifacts on this page. Green fill is points earned; the red track is points possible, so every bar shows earned-versus-possible at a glance. Every facet and dimension name is a link: it opens that measurement's page on APIs.io, where the rating runs across the whole catalog — the exact checks that feed it, how every profiled provider distributes on it, and who is at the top of it.

Kin Score Kin Score How this is scored →
scored 2026-09-08 · rubric v0.20.0
Composite quality — 43.2/100 · developing
Contract Quality 12.5 / 25
Access Clarity 7.4 / 20
Discoverability 7.0 / 10
Label Studio Kin Score — API readiness rating by API Evangelist

Put this on your own site. The badge is drawn live from Label Studio's current Kin Score — paste it once and it updates itself every time the score is recomputed. It follows your visitor's light or dark setting, and it links back here so anyone who sees it can read the full breakdown.

<!-- Kin Score · API Evangelist -->
<a href="https://providers.apievangelist.com/providers/label-studio/"
   title="Label Studio on API Evangelist — API profile and Kin Score">
  <img src="https://apis.io/badge/label-studio.svg"
       alt="Label Studio Kin Score — API readiness rating by API Evangelist" width="150" height="150" loading="lazy">
</a>

More shapes, themes and sizes → · Score as JSON · How badges work

How we profile Label Studio

Each block below is one kind of artifact we hold for Label Studio. For each we say what it is and why it earns a place in the profile, then list every one we've indexed — capped at two rows, scroll within the panel for the rest.

APIs 74

Each API is captured as its own OpenAPI definition — every operation, parameter, and response. This is the single most useful machine-readable description of what an API does, and it's what lets us score, lint, mock, and generate against it without asking the provider for anything.

Individual APIs this provider publishes, each with its own machine-readable definition.

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.

Label Studio subpackage_predictions API

The subpackage_predictions API from Label Studio — 2 operation(s) for subpackage_predictions.

Label Studio subpackage_projects API

The subpackage_projects API from Label Studio — 8 operation(s) for subpackage_projects.

Label Studio subpackage_projects.subpackage_projects/assignments API

The subpackage_projects.subpackage_projects/assignments API from Label Studio — 2 operation(s) for subpackage_projects.subpackage_projects/assignments.

Label Studio subpackage_projects.subpackage_projects/exports API

The subpackage_projects.subpackage_projects/exports API from Label Studio — 6 operation(s) for subpackage_projects.subpackage_projects/exports.

Label Studio subpackage_projects.subpackage_projects/members API

The subpackage_projects.subpackage_projects/members API from Label Studio — 1 operation(s) for subpackage_projects.subpackage_projects/members.

Label Studio subpackage_projects.subpackage_projects/members.subpackage_projects/members/bulk API

The subpackage_projects.subpackage_projects/members.subpackage_projects/members/bulk API from Label Studio — 1 operation(s) for subpackage_projects.subpackage_projects/members.s...

Label Studio subpackage_projects.subpackage_projects/members.subpackage_projects/members/paginated API

The subpackage_projects.subpackage_projects/members.subpackage_projects/members/paginated API from Label Studio — 1 operation(s) for subpackage_projects.subpackage_projects/memb...

Label Studio subpackage_projects.subpackage_projects/metrics API

The subpackage_projects.subpackage_projects/metrics API from Label Studio — 1 operation(s) for subpackage_projects.subpackage_projects/metrics.

Label Studio subpackage_projects.subpackage_projects/metrics.subpackage_projects/metrics/custom API

The subpackage_projects.subpackage_projects/metrics.subpackage_projects/metrics/custom API from Label Studio — 6 operation(s) for subpackage_projects.subpackage_projects/metrics...

Label Studio subpackage_projects.subpackage_projects/pauses API

The subpackage_projects.subpackage_projects/pauses API from Label Studio — 2 operation(s) for subpackage_projects.subpackage_projects/pauses.

Label Studio subpackage_projects.subpackage_projects/reviewRoutingRules API

The subpackage_projects.subpackage_projects/reviewRoutingRules API from Label Studio — 2 operation(s) for subpackage_projects.subpackage_projects/reviewroutingrules.

Label Studio subpackage_projects.subpackage_projects/roles API

The subpackage_projects.subpackage_projects/roles API from Label Studio — 3 operation(s) for subpackage_projects.subpackage_projects/roles.

Label Studio subpackage_projects.subpackage_projects/stats API

The subpackage_projects.subpackage_projects/stats API from Label Studio — 20 operation(s) for subpackage_projects.subpackage_projects/stats.

Label Studio subpackage_projectTemplates API

The subpackage_projectTemplates API from Label Studio — 3 operation(s) for subpackage_projecttemplates.

Label Studio subpackage_prompts API

The subpackage_prompts API from Label Studio — 7 operation(s) for subpackage_prompts.

Label Studio subpackage_prompts.subpackage_prompts/indicators API

The subpackage_prompts.subpackage_prompts/indicators API from Label Studio — 2 operation(s) for subpackage_prompts.subpackage_prompts/indicators.

Label Studio subpackage_prompts.subpackage_prompts/runs API

The subpackage_prompts.subpackage_prompts/runs API from Label Studio — 2 operation(s) for subpackage_prompts.subpackage_prompts/runs.

Label Studio subpackage_prompts.subpackage_prompts/versions API

The subpackage_prompts.subpackage_prompts/versions API from Label Studio — 5 operation(s) for subpackage_prompts.subpackage_prompts/versions.

Label Studio subpackage_sessionPolicy API

The subpackage_sessionPolicy API from Label Studio — 1 operation(s) for subpackage_sessionpolicy.

Label Studio subpackage_sso.subpackage_sso/saml API

The subpackage_sso.subpackage_sso/saml API from Label Studio — 2 operation(s) for subpackage_sso.subpackage_sso/saml.

Label Studio subpackage_sso.subpackage_sso/scim API

The subpackage_sso.subpackage_sso/scim API from Label Studio — 1 operation(s) for subpackage_sso.subpackage_sso/scim.

Label Studio subpackage_states API

The subpackage_states API from Label Studio — 5 operation(s) for subpackage_states.

Label Studio subpackage_tasks API

The subpackage_tasks API from Label Studio — 5 operation(s) for subpackage_tasks.

Label Studio subpackage_tasks.subpackage_tasks/agreementMatrix API

The subpackage_tasks.subpackage_tasks/agreementMatrix API from Label Studio — 1 operation(s) for subpackage_tasks.subpackage_tasks/agreementmatrix.

Label Studio subpackage_tokens API

The subpackage_tokens API from Label Studio — 4 operation(s) for subpackage_tokens.

Label Studio subpackage_users API

The subpackage_users API from Label Studio — 7 operation(s) for subpackage_users.

Label Studio subpackage_versions API

The subpackage_versions API from Label Studio — 1 operation(s) for subpackage_versions.

Label Studio subpackage_views API

The subpackage_views API from Label Studio — 4 operation(s) for subpackage_views.

Label Studio subpackage_webhooks API

The subpackage_webhooks API from Label Studio — 3 operation(s) for subpackage_webhooks.

Label Studio subpackage_workspaces API

The subpackage_workspaces API from Label Studio — 2 operation(s) for subpackage_workspaces.

Label Studio subpackage_workspaces.subpackage_workspaces/members API

The subpackage_workspaces.subpackage_workspaces/members API from Label Studio — 1 operation(s) for subpackage_workspaces.subpackage_workspaces/members.

Label Studio subpackage_workspaces.subpackage_workspaces/members.subpackage_workspaces/members/bulk API

The subpackage_workspaces.subpackage_workspaces/members.subpackage_workspaces/members/bulk API from Label Studio — 1 operation(s) for subpackage_workspaces.subpackage_workspaces...

Label Studio subpackage_workspaces.subpackage_workspaces/members.subpackage_workspaces/members/paginated API

The subpackage_workspaces.subpackage_workspaces/members.subpackage_workspaces/members/paginated API from Label Studio — 1 operation(s) for subpackage_workspaces.subpackage_works...

Label Studio subpackage_workspaces.subpackage_workspaces/projects API

The subpackage_workspaces.subpackage_workspaces/projects API from Label Studio — 1 operation(s) for subpackage_workspaces.subpackage_workspaces/projects.

Scroll within the panel for all 74 ·

Open Collections 74

Open, tool-agnostic collections carry the same runnable value as Postman without locking you to one client — the portable, forkable form of the same exercise.

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

API Collection

OPEN COLLECTION

API Reference

OPEN COLLECTION

Scroll within the panel for all 74 ·

Pricing Plans 1

Pricing is part of the interface. Machine-readable plans tell you what a tier costs and includes before you commit — one of the things the Kin Score reads for access clarity — renamed from commercial clarity in rubric 0.12, because a free statutory interface has access terms and no commercial ones.

Published pricing tiers and plan structures.

Rate Limits 1

Rate limits are the difference between a demo that works and a production integration that doesn't fall over. Publishing them is an operational-transparency signal — and a hard requirement for any agent that plans its own throughput.

Documented rate limits and quota policies.

Label Studio Rate Limits

5 limits

RATE LIMITS

FinOps 1

Cost, billing, and metering signals let a buyer model the financial operations of an API before it's live. We profile them for the same reason we profile pricing: the money is part of the contract.

Cost, billing, and metering signals for API financial operations.

Security Posture 2

Authentication, domain security, vulnerability disclosure, and trust-center signals — the evidence that a provider takes security seriously enough to document it. We profile it because you can't govern what you can't see.

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Label Studio Authentication

apiKey · 1 scheme

SECURITY

Label Studio Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Agentic Access 1

An x-agentic-access contract marks which operations are safe for an agent to run on its own and which need a human in the loop. It is the difference between an API an agent can use and one it can use safely.

Recommended x-agentic-access execution contracts for AI agents.

Label Studio Agentic Access

400 operations · 233 acting · 9 human-in-the-loop

400 operations · 233 acting

AGENTIC

Resources

Every other property we hold for Label Studio — documentation, portals, status pages, policies, and corporate surface — grouped by the job it does, following the integrator's arc from getting started to running in production.

Documentation 2

Reference material describing how the API behaves

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

Build 2

SDKs, sample code, and the tooling you integrate with

Access & Security 2

Authentication, authorization, and security posture

Operate 3

Status, limits, changes, and where to get help

Commercial 3

Pricing, plans, and the legal terms of use

Company 3

The organization behind the API

Other 1

Properties that don't map to a standard resource type

← All providers · Data indexed from github.com/api-evangelist/label-studio · machine-readable index on apis.io

Where this information came from

This is an independent, third-party profile of Label Studio, published by API Evangelist. We do not operate, host, resell, or support these APIs, and we are not affiliated with or endorsed by the company unless stated above. Everything here is built from publicly available information — the company's own site, developer portal, documentation, public repositories, and the specifications it publishes for public use. Nothing is obtained by breaching a system, defeating an access control, or using credentials.

The Kin Score and Agent Readiness rating are independently calculated assessments of a company's public API artifacts, scored against a published rubric. They are not certifications, endorsements, security assessments, or audits.

Corrections, re-scores, and removal are free — no partnership or purchase required, and you do not need to justify the request. A removed company is recorded as unrated, never scored zero for having asked. Acknowledgement within one business day; removal within two.

info@apievangelist.com · Read the full data-sourcing policy →
On a security or compliance team? Put security in the subject line and you will get a person, not a form — we will tell you exactly which public URLs this profile was built from.