# Apache Helix

**Canonical:** https://apis.io/providers/apache-helix/  
**APIs profiled:** 5

Apache Helix is a generic cluster management framework for partitioned and replicated distributed resources. It automates partition management, replication, fault tolerance, and cluster expansion for distributed systems, providing a REST API for cluster administration and a Java API for participant, spectator, and controller roles.

## Kin Score — 35.7 / 100 (thin)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 35.7).

| Facet | Score |
|---|---|
| Discoverability | 64.8 |
| Contract Quality | 55.9 |
| Governance | 25.0 |
| Contract Governance | 25.0 |
| Operational Transparency | 36.8 |
| Developer Ergonomics | 21.4 |
| Commercial Clarity | 15.8 |
| Access Clarity | 15.8 |

## Agent readiness — 20.5 (agent-aware)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | derived |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | no |
| Idempotency | no |
| Error Semantics | no |
| OpenAPI Examples | no |
| 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 — onboarding: unknown, pricing: freemium, trial: no (confidence: medium).

## APIs (5)

- **Apache Helix Java API** — Java API for implementing Helix participant, spectator, and controller roles, with APIs for resource management, task execution, and state machine definitions.
- **Apache Helix Clusters API** — Cluster management operations
- **Apache Helix Instances API** — Instance management operations
- **Apache Helix Resources API** — Resource management operations
- **Apache Helix State API** — Partition state operations

## Agentic access (1)

- **Apache Helix Agentic Access** — 10 operations · 2 acting

## Security (2)

- **Apache Helix Domain Security** — TLSv1.3 · HSTS · DMARC
- **Apache Helix Vulnerability Disclosure** — security.txt · contact published

## Plans (1)

- **Apache Helix Plans Pricing**

## Use cases (5)

- **Distributed Database Cluster Management** — Manage shard assignment and replication for distributed databases like DistributedLog or Espresso.
- **Search Index Partition Management** — Automatically balance and assign search index shards across a cluster of query servers.
- **Distributed Task Scheduling** — Schedule and execute distributed batch tasks with automatic retry and failure recovery.
- **Microservices Load Balancing** — Use Helix spectator API to implement client-side load balancing based on partition state.
- **Stateful Service Migration** — Perform rolling upgrades and partition migrations without service downtime.

## Tags

Apache, Cluster Management, Distributed Systems, Open-Source, Partitioning, Replication

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/apache-helix/). Scores are computed from the provider's own public artifacts under a published rubric.