Split

Split, now part of Harness Feature Management and Experimentation, is a feature flag and experimentation platform that enables teams to safely release features with controlled rollouts and measure their impact. Their developer platform provides REST APIs for managing feature flags, environments, segments, and workspaces, along with SDKs for evaluating feature flags across multiple languages and platforms.

Split publishes 5 APIs on the APIs.io network, including Admin API, Evaluation API, Events API, and 2 more. Tagged areas include Experimentation, Feature Flags, Feature Management, Rollouts, and SDK.

The Split catalog on APIs.io includes 1 JSON-LD context and 2 Spectral governance rulesets.

Split’s developer surface includes authentication, developer portal, documentation, engineering blog, and 18 more developer resources.

🌐 Visit website 📡 Source on GitHub

39.0/100 thin ▬ flat Agent 24/100 agent aware saas Full breakdown ↓
scored 2026-09-14 · rubric v0.22.0

AccessPaid

2 APIs 16 Features

Experimentation Feature Flags Feature Management Rollouts SDK

Kin Score

Kin Score How this is scored →
scored 2026-09-14 · rubric v0.22.0

Composite quality — 39.0/100 · thin

Contract Quality 13.3 / 23

Developer Ergonomics 6.2 / 18

Access Clarity 5.9 / 18

Operational Transparency 1.2 / 12

Contract Governance 3.1 / 11

Discoverability 6.0 / 9

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 24/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 6 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 7 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 0 / 6

Agent Skills 0 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Create-or-Update Ergonomics applies to this provider. This API accepts writes, so it carries 10 points of the composite. It is scored from the published contracts themselves: whether a caller can create-or-update in one call, whether the write accepts a key the caller already holds, and whether the response says which branch ran. Without that, every write needs a search-and-branch in front of it, and the first time that check is skipped a duplicate record is created. Scored against the observed mean rather than raw — a provider at the catalog average is unchanged by this facet, not penalised by it.

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from github.com/api-evangelist/split: open an issue to ask a question, or submit a pull request to add artifacts. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

Standards implemented 1

Interfaces this provider implements that became standards by being copied rather than ratified. Each is profiled by the API Commons, and the evidence column says how the claim was established — not that it was made.

SCIM 2.0

prose — states compatibility; nothing published to check it against

5 core of 24 operations graded · api-commons/identity

APIs 10

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

Split Admin API

The Split Admin API is a REST API that enables programmatic management of workspaces (projects), environments, traffic types, attributes, users, groups, API keys, and change req...

Split JavaScript SDK

The Split JavaScript SDK provides client-side integration for feature flag evaluation in browser-based applications. It handles real-time feature flag synchronization, treatment...

Split Node.js SDK

The Split Node.js SDK enables server-side feature flag evaluation for Node.js applications with local evaluation, automatic synchronization, event tracking, and impression logging.

Split Java SDK

The Split Java SDK provides server-side feature flag evaluation for Java and JVM-based applications with local treatment evaluation and streaming updates.

Split Python SDK

The Split Python SDK enables server-side feature flag evaluation for Python applications, suitable for Django, Flask, and other frameworks.

Split React SDK

The Split React SDK provides React-specific components and hooks for integrating feature flags including a SplitProvider context, useTreatments hooks, and conditional rendering ...

Split Evaluation API

Endpoints for evaluating feature flags and retrieving treatment values for given keys and feature flag names.

Split Events API

Endpoints for tracking custom events used in experimentation and metrics measurement.

Split Feature Flag Definitions API

Manage feature flag definitions in specific environments, including targeting rules, treatments, percentage rollouts, and default treatments.

Split Feature Flags API

Create, retrieve, update, and delete feature flags (splits) within workspaces. Feature flags represent the toggles used to control feature rollouts.

Scroll for all 10

Split Admin Workspaces API

POSTMAN

OPEN COLLECTION

Scroll for all 19

Pricing Plans 1

Published pricing tiers and plan structures.

Split Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Split Rate Limits

3 limits

RATE LIMITS

FinOps 1

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

Split Finops

FINOPS

Features 16

Notable capabilities this provider offers.

Individual free for solo devs, up to 10 MAU

Team: per-MAU pricing (custom)

Enterprise: Statistical Engine, Causal Impact, SCIM/SSO

Now Harness Feature Management & Experimentation (FME)

Server-side and client-side SDKs

Targeting rules with attributes

Experimentation with frequentist and Bayesian inference

Admin API: 80 req/min/org

Datafile-based SDK distribution (CDN-backed)

Events API: 100 events per request

OAuth 2.0 + API keys

Webhooks for split changes and rollouts

Audit logs (Enterprise)

Streaming changes (server-sent events)

Causal Impact analysis for treatment effect

Integration with Datadog, NewRelic, Segment for guardrails

Scroll for all 16

Semantic Vocabularies 1

JSON-LD contexts and semantic vocabularies used across these APIs.

Split Context

0 classes · 11 properties

JSON-LD

Spectral Rules 2

Spectral governance rulesets for linting and validating these APIs.

Split API Rules

6 rules · 4 warnings 2 info

SPECTRAL

Split API Rules

11 rules · 4 errors 5 warnings 2 info

SPECTRAL

3 properties

JSON SCHEMA

WorkspaceList

Agentic Access 1

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

Split Agentic Access

53 operations · 28 acting · 1 human-in-the-loop

53 operations · 28 acting

AGENTIC

Resources

Get Started 2

Portal, sign-up, and the first successful call

Portal

Portal

Login

Documentation 4

Reference material describing how the API behaves

Documentation

JSONSchema

JSONSchema

JSONSchema

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

LlmsText

LlmsText

Design & Contract 5

Pagination, idempotency, versioning, errors, and events

JSONStructure

JSONStructure

JSONLD

SpectralRules

Vocabulary

Build 2

SDKs, sample code, and the tooling you integrate with

PostmanWorkspace

PostmanWorkspace

GitHubOrganization

GitHubOrganization

Access & Security 2

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Authentication

Authentication

Commercial 2

Pricing, plans, and the legal terms of use

PrivacyPolicy

PrivacyPolicy

TermsOfService

TermsOfService

Company 3

The organization behind the API

LinkedIn

Website

Website

Blog

Blog

Source (apis.yml)

aid: split
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: true
  label: Hosted service · you call their endpoint
  confidence: high
  source:
  - openapi
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: paid
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Paid
  confidence: medium
  source:
  - plans
  - authentication
  - security
  generated: '2026-09-03'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/split.png
name: Split
description: Split, now part of Harness Feature Management and Experimentation, is a feature flag and experimentation platform
  that enables teams to safely release features with controlled rollouts and measure their impact. Their developer platform
  provides REST APIs for managing feature flags, environments, segments, and workspaces, along with SDKs for evaluating feature
  flags across multiple languages and platforms.
url: https://raw.githubusercontent.com/api-evangelist/split/refs/heads/main/apis.yml
created: '2026-03-20'
modified: '2026-05-19'
specificationVersion: '0.23'
type: Index
tags:
- Experimentation
- Feature Flags
- Feature Management
- Rollouts
- SDK
tags_raw:
- Experimentation
- Feature Flags
- Feature Management
- Rollouts
- SDKs
apis:
- aid: split:split-admin-api
  name: Split Admin API
  description: The Split Admin API is a REST API that enables programmatic management of workspaces (projects), environments,
    traffic types, attributes, users, groups, API keys, and change requests within the Split platform (now Harness Feature
    Management and Experimentation). The API uses resource-oriented URLs, returns JSON responses, and requires Admin API keys
    for authentication. All endpoints are prefixed with /internal/api/v2 on the api.split.io host.
  humanURL: https://docs.split.io/reference/introduction
  tags:
  - Administration
  - Experimentation
  - Feature Flags
  - Feature Management
  properties:
  - type: Documentation
    url: https://docs.split.io/reference/introduction
  - type: OpenAPI
    url: openapi/split-admin-api-openapi.yml
  - type: JSONStructure
    url: json-structure/split-feature-flag-structure.json
- aid: split:split-javascript-sdk
  name: Split JavaScript SDK
  description: The Split JavaScript SDK provides client-side integration for feature flag evaluation in browser-based applications.
    It handles real-time feature flag synchronization, treatment evaluation, event tracking, and impression management.
  humanURL: https://help.split.io/hc/en-us/articles/360020448791-JavaScript-SDK
  tags:
  - Browser
  - Feature Flags
  - JavaScript
  - SDK
  properties:
  - type: Documentation
    url: https://help.split.io/hc/en-us/articles/360020448791-JavaScript-SDK
- aid: split:split-nodejs-sdk
  name: Split Node.js SDK
  description: The Split Node.js SDK enables server-side feature flag evaluation for Node.js applications with local evaluation,
    automatic synchronization, event tracking, and impression logging.
  humanURL: https://help.split.io/hc/en-us/articles/360020564931-Node-js-SDK
  tags:
  - Feature Flags
  - Node.js
  - SDK
  - Server-Side
  tags_raw:
  - Feature Flags
  - Node.js
  - SDK
  - Server Side
  properties:
  - type: Documentation
    url: https://help.split.io/hc/en-us/articles/360020564931-Node-js-SDK
- aid: split:split-java-sdk
  name: Split Java SDK
  description: The Split Java SDK provides server-side feature flag evaluation for Java and JVM-based applications with local
    treatment evaluation and streaming updates.
  humanURL: https://help.split.io/hc/en-us/articles/360020405151-Java-SDK
  tags:
  - Feature Flags
  - Java
  - SDK
  - Server-Side
  tags_raw:
  - Feature Flags
  - Java
  - SDK
  - Server Side
  properties:
  - type: Documentation
    url: https://help.split.io/hc/en-us/articles/360020405151-Java-SDK
- aid: split:split-python-sdk
  name: Split Python SDK
  description: The Split Python SDK enables server-side feature flag evaluation for Python applications, suitable for Django,
    Flask, and other frameworks.
  humanURL: https://help.split.io/hc/en-us/articles/360020359652-Python-SDK
  tags:
  - Feature Flags
  - Python
  - SDK
  - Server-Side
  tags_raw:
  - Feature Flags
  - Python
  - SDK
  - Server Side
  properties:
  - type: Documentation
    url: https://help.split.io/hc/en-us/articles/360020359652-Python-SDK
- aid: split:split-react-sdk
  name: Split React SDK
  description: The Split React SDK provides React-specific components and hooks for integrating feature flags including a
    SplitProvider context, useTreatments hooks, and conditional rendering components.
  humanURL: https://help.split.io/hc/en-us/articles/360038825091-React-SDK
  tags:
  - Feature Flags
  - Frontend
  - JavaScript
  - React
  - SDK
  properties:
  - type: Documentation
    url: https://help.split.io/hc/en-us/articles/360038825091-React-SDK
- aid: split:split-evaluation-api
  name: Split Evaluation API
  description: Endpoints for evaluating feature flags and retrieving treatment values for given keys and feature flag names.
  humanURL: https://docs.split.io/reference/introduction
  tags:
  - Evaluation
  properties:
  - type: OpenAPI
    url: openapi/split-evaluation-api-openapi.yml
  - type: Documentation
    url: https://docs.split.io/reference/feature-flag-overview
  - type: JSONStructure
    url: json-structure/split-feature-flag-definition-structure.json
  - type: Documentation
    url: https://help.split.io/hc/en-us/articles/360020037072-Split-Evaluator
- aid: split:split-events-api
  name: Split Events API
  description: Endpoints for tracking custom events used in experimentation and metrics measurement.
  humanURL: https://docs.split.io/reference/introduction
  tags:
  - Event
  tags_raw:
  - Events
  properties:
  - type: OpenAPI
    url: openapi/split-events-api-openapi.yml
  - type: Documentation
    url: https://docs.split.io/reference/feature-flag-overview
  - type: JSONStructure
    url: json-structure/split-feature-flag-definition-structure.json
  - type: Documentation
    url: https://help.split.io/hc/en-us/articles/360020037072-Split-Evaluator
- aid: split:split-feature-flag-definitions-api
  name: Split Feature Flag Definitions API
  description: Manage feature flag definitions in specific environments, including targeting rules, treatments, percentage
    rollouts, and default treatments.
  humanURL: https://docs.split.io/reference/introduction
  tags:
  - Feature Flag Definitions
  properties:
  - type: OpenAPI
    url: openapi/split-feature-flag-definitions-api-openapi.yml
  - type: Documentation
    url: https://docs.split.io/reference/feature-flag-overview
  - type: JSONStructure
    url: json-structure/split-feature-flag-definition-structure.json
  - type: Documentation
    url: https://help.split.io/hc/en-us/articles/360020037072-Split-Evaluator
- aid: split:split-feature-flags-api
  name: Split Feature Flags API
  description: Create, retrieve, update, and delete feature flags (splits) within workspaces. Feature flags represent the
    toggles used to control feature rollouts.
  humanURL: https://docs.split.io/reference/introduction
  tags:
  - Feature Flags
  properties:
  - type: OpenAPI
    url: openapi/split-feature-flags-api-openapi.yml
  - type: Documentation
    url: https://docs.split.io/reference/feature-flag-overview
  - type: JSONStructure
    url: json-structure/split-feature-flag-definition-structure.json
  - type: Documentation
    url: https://help.split.io/hc/en-us/articles/360020037072-Split-Evaluator
common:
- type: PostmanWorkspace
  url: https://www.postman.com/kinlaneapi/split/overview
- type: AgenticAccess
  url: agentic-access/split-agentic-access.yml
- type: DomainSecurity
  url: security/split-domain-security.yml
- type: Authentication
  url: authentication/split-authentication.yml
- type: GitHubOrganization
  url: https://github.com/splitio
- type: LinkedIn
  url: https://www.linkedin.com/company/split-software
- type: Portal
  url: https://docs.split.io/reference/introduction
- type: Documentation
  url: https://help.split.io/hc/en-us
- type: Website
  url: https://www.split.io/
- type: PrivacyPolicy
  url: https://www.harness.io/legal/privacy
- type: TermsOfService
  url: https://www.harness.io/legal/terms-of-use
- type: Blog
  url: https://www.split.io/blog/
- type: Login
  url: https://app.split.io/login
- type: JSONSchema
  url: json-schema/split-feature-flag-schema.json
- type: JSONSchema
  url: json-schema/split-feature-flag-definition-schema.json
- type: JSONSchema
  url: json-schema/split-segment-schema.json
- type: JSONStructure
  url: json-structure/split-feature-flag-structure.json
- type: JSONStructure
  url: json-structure/split-feature-flag-definition-structure.json
- type: JSONLD
  url: json-ld/split-context.jsonld
- type: SpectralRules
  url: rules/split-rules.yml
- type: Vocabulary
  url: vocabulary/split-vocabulary.yml
- type: Features
  data:
  - Individual free for solo devs, up to 10 MAU
  - 'Team: per-MAU pricing (custom)'
  - 'Enterprise: Statistical Engine, Causal Impact, SCIM/SSO'
  - Now Harness Feature Management & Experimentation (FME)
  - Server-side and client-side SDKs
  - Targeting rules with attributes
  - Experimentation with frequentist and Bayesian inference
  - 'Admin API: 80 req/min/org'
  - Datafile-based SDK distribution (CDN-backed)
  - 'Events API: 100 events per request'
  - OAuth 2.0 + API keys
  - Webhooks for split changes and rollouts
  - Audit logs (Enterprise)
  - Streaming changes (server-sent events)
  - Causal Impact analysis for treatment effect
  - Integration with Datadog, NewRelic, Segment for guardrails
  sources:
  - https://www.harness.io/pricing
  updated: '2026-05-04'
- type: LlmsText
  url: https://docs.split.io/llms.txt
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

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