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.
Solid contracts, transparent operations, and an easy start — typically complete on four or five facets with one clear soft spot.
API Evangelist profiles Split the way a machine reads it — 101 machine-readable artifacts across 21 APIs, 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 — Split scores 61.6/100 (strong), with a separate agent-readiness read of 48/100 (agent ready). 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.
How we profile Split
Each block below is one kind of artifact we hold for Split. 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 21
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.
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 API Keys API
Create and delete API keys for authenticating with the Split platform, with configurable roles and scopes.
Split Attributes API
Manage attributes used in targeting rules for feature flag definitions.
Split Change Requests API
Manage change requests for controlled approval workflows when modifying feature flag definitions.
Split Environments API
Manage environments within workspaces for deploying and testing feature flags across stages such as staging and production.
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.
Split Groups API
Manage groups for organizing users and assigning permissions.
Split Identities API
Manage identities (keys) within segments.
Split Large Segments API
Manage large segments optimized for high-volume identity lists.
Split Segments API
Manage segments which define reusable groups of identities for targeting.
Split Traffic Types API
Manage traffic types which define the entities (users, accounts, etc.) that feature flags target.
Split Users API
Manage users within the Split account, including inviting new users and updating user roles.
Split Workspaces API
Manage workspaces (projects) which organize feature flags and experiments across business units, product lines, and applications.
Scroll within the panel for all 21 ·
Open Collections 3
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).
Split Admin API
OPEN COLLECTIONSplit Evaluator API
OPEN COLLECTIONSplit Feature Flag API
OPEN COLLECTIONPricing 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 six things the Kin Score reads for commercial clarity.
Published pricing tiers and plan structures.
Split Plans Pricing
PLANSRate 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.
Split Rate Limits
RATE LIMITSFinOps 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.
Split Finops
FINOPSFeatures 16
The notable capabilities this provider advertises, captured as structured features so they can be searched and compared instead of read one landing page at a time.
Notable capabilities this provider offers.
Scroll within the panel for all 16 ·
Semantic Vocabularies 1
JSON-LD contexts give the data shared meaning across APIs. We profile them because semantics are what let a machine reconcile 'customer' here with 'customer' somewhere else.
JSON-LD contexts and semantic vocabularies used across these APIs.
Split Context
JSON-LDSpectral Rules 2
Governance rulesets we run against this provider's specs — the automated checks behind parts of the score. Profiling them makes the quality bar explicit and re-runnable, not a matter of opinion.
Split API Rules
SPECTRALSplit API Rules
SPECTRALJSON Schema 46
Standalone JSON Schema definitions describe the data models behind the API. We profile them so the shapes are validatable on their own — useful long after a single request is forgotten.
Standalone JSON Schema definitions for this provider's data models.
AllTreatmentsResult
JSON SCHEMAApiKey
JSON SCHEMAApiKeyCreate
JSON SCHEMAAttribute
JSON SCHEMABucket
JSON SCHEMAChangeRequest
JSON SCHEMAChangeRequestList
JSON SCHEMACondition
JSON SCHEMAEnvironment
JSON SCHEMAEnvironmentCreate
JSON SCHEMAEnvironmentRef
JSON SCHEMAEnvironmentUpdate
JSON SCHEMAEvaluationAttributes
JSON SCHEMAEventProperties
JSON SCHEMASplit Feature Flag Definition
JSON SCHEMASplit Feature Flag
JSON SCHEMAFeatureFlag
JSON SCHEMAFeatureFlagCreate
JSON SCHEMAFeatureFlagDefinition
JSON SCHEMAFeatureFlagDefinitionCreate
JSON SCHEMAFeatureFlagDefinitionList
JSON SCHEMAFeatureFlagDefinitionUpdate
JSON SCHEMAFeatureFlagList
JSON SCHEMAFeatureFlagUpdate
JSON SCHEMAGroup
JSON SCHEMAGroupCreate
JSON SCHEMAGroupRef
JSON SCHEMAHealthCheckResponse
JSON SCHEMALargeSegmentList
JSON SCHEMAMatcher
JSON SCHEMASplit Segment
JSON SCHEMASegmentKeysList
JSON SCHEMASegmentKeysUpdate
JSON SCHEMASegmentList
JSON SCHEMATag
JSON SCHEMATargetingRule
JSON SCHEMATrafficType
JSON SCHEMATreatment
JSON SCHEMATreatmentResult
JSON SCHEMATreatmentsResult
JSON SCHEMAUser
JSON SCHEMAUserInvite
JSON SCHEMAUserList
JSON SCHEMAUserUpdate
JSON SCHEMAWorkspace
JSON SCHEMAWorkspaceList
JSON SCHEMAScroll within the panel for all 46 ·
JSON Structure 3
JSON Structure captures the data shapes in a form built for tooling — a complement to JSON Schema that keeps the model machine-legible.
JSON Structure definitions describing this provider's data shapes.
Split Feature Flag Definition Structure
JSON STRUCTURESplit Feature Flag Structure
JSON STRUCTURESplit Structure
JSON STRUCTUREExamples 3
Real request and response payloads are what turn a spec from abstract into obvious — and they're one of the twelve things an agent needs to call an API correctly on the first try.
Example request and response payloads for these APIs.
Split Get Treatment Example
EXAMPLESecurity 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.
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.
Resources
Every other property we hold for Split — 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.
Get Started 2
Portal, sign-up, and the first successful call
Documentation 4
Reference material describing how the API behaves
Agent Surfaces 2
MCP servers, agent skills, and machine-readable catalogs
Design & Contract 5
Pagination, idempotency, versioning, errors, and events
Build 1
SDKs, sample code, and the tooling you integrate with
Access & Security 2
Authentication, authorization, and security posture
Commercial 2
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
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