Apache Storm

Apache Storm is a free and open-source distributed real-time computation system that makes it easy to reliably process unbounded streams of data at scale. It provides a simple programming model (topologies with spouts and bolts), guaranteed message processing, horizontal scalability, and fault tolerance. Storm integrates with queuing and database technologies including Apache Kafka and Apache Cassandra and is governed by the Apache Software Foundation.

Apache Storm publishes 9 APIs on the APIs.io network, including Topology API, Cluster API, Drpc API, and 6 more. Tagged areas include Distributed Computing, Event Processing, Real-Time, Stream Processing, and Open-Source.

Apache Storm’s developer surface includes documentation, developer portal, getting-started guide, release notes, support, engineering blog, and 10 more developer resources.

🌐 Visit website 📡 Source on GitHub

37.9/100 thin ▬ flat Agent 17/100 agent aware open core · Apache-2.0 Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

AccessFreemium

9 APIs 6 Features 4 Use Cases

Distributed ComputingEvent ProcessingReal-Time Stream Processing Open-Source

Kin Score

Kin Score How this is scored →
scored 2026-09-08 · rubric v0.20.0

Composite quality — 37.9/100 · thin

Contract Quality 6.9 / 20

Developer Ergonomics 7.2 / 16

Access Clarity 4.2 / 16

Operational Transparency 4.1 / 10

Contract Governance 0.0 / 10

Discoverability 5.2 / 8

Open Source Surface 7.5 / 10

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 17/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 0 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 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

Open Source Surface applies to this provider. This product is open source and we read its repository directly, so Open Source Surface carries 10 points of the composite. It is scored from what the repository actually publishes — a security policy, a contribution guide, a release history, a code of conduct — read live from the provider rather than inferred from our own catalog pointers. This facet adds; nothing was taken away to make room for it. An open-source project is not excused from the commercial facets, because exemption would strip it of the points it does earn. If we have the wrong repository, or this product is not open source, say so on your provider repo and we will drop the facet rather than have you publish against it.

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.

The six quality facets above are damped to 80 points between them, because the conditional facet above carries the other 20. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 80% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.

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/apache-storm: 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 →

APIs 9

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

Apache Storm Topology API

The Storm Topology API provides Java and other language bindings for building real-time processing topologies composed of spouts (data sources) and bolts (processing units). It ...

Apache Storm Cluster API

The Cluster API from Apache Storm — 2 operation(s) for cluster.

Apache Storm Drpc API

The Drpc API from Apache Storm — 2 operation(s) for drpc.

Apache Storm History API

The History API from Apache Storm — 1 operation(s) for history.

Apache Storm Nimbus API

The Nimbus API from Apache Storm — 1 operation(s) for nimbus.

Apache Storm Owner Resources API

The Owner Resources API from Apache Storm — 1 operation(s) for owner resources.

Apache Storm Supervisor API

The Supervisor API from Apache Storm — 2 operation(s) for supervisor.

Apache Storm Topology API

The Topology API from Apache Storm — 14 operation(s) for topology.

Apache Storm Topology Workers API

The Topology Workers API from Apache Storm — 1 operation(s) for topology workers.

Scroll for all 9

Open Collections 10

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

API Collection

OPEN COLLECTION

Apache Storm UI REST Cluster API

OPEN COLLECTION

Apache Storm UI REST Cluster Drpc API

OPEN COLLECTION

Apache Storm UI REST Cluster History API

OPEN COLLECTION

Apache Storm UI REST Cluster Nimbus API

OPEN COLLECTION

Apache Storm UI REST Cluster Owner Resources API

OPEN COLLECTION

Apache Storm UI REST Cluster Supervisor API

OPEN COLLECTION

Apache Storm UI REST Cluster Topology API

OPEN COLLECTION

Apache Storm UI REST Cluster Topology Workers API

OPEN COLLECTION

Apache Storm UI REST API

OPEN COLLECTION

Scroll for all 10

Pricing Plans 1

Published pricing tiers and plan structures.

Apache Storm Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Apache Storm Rate Limits

5 limits

RATE LIMITS

FinOps 1

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

Apache Storm Finops

FINOPS

Features 6

Notable capabilities this provider offers.

Guaranteed Message Processing

At-least-once processing guarantees through ack/fail tracking mechanism.

Scalable Topologies

Horizontally scalable stream processing topologies with configurable parallelism.

Trident API

High-level micro-batch processing abstraction with stateful streaming and exactly-once semantics.

DRPC

Distributed Remote Procedure Calls for synchronous distributed computation.

Windowing Operations

Tumbling and sliding window processing over bounded time or count windows.

Multi-Language Support

Topology components written in Java, Python, Ruby, and other languages via Multilang protocol.

Security Posture 2

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

Apache Storm Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Apache Storm Vulnerability Disclosure

security.txt · contact published

SECURITY

Agentic Access 1

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

Apache Storm Agentic Access

25 operations · 11 acting · 2 human-in-the-loop

25 operations · 11 acting

AGENTIC

Use Cases 4

What developers build with this provider.

Real-Time Analytics

Continuous computation over live event streams for operational dashboards.

ETL Processing

Real-time data transformation and enrichment pipelines.

Machine Learning Scoring

Online scoring of ML models against streaming feature data.

Fraud Detection

Low-latency fraud detection rules applied to transaction streams.

Integrations 5

Pre-built integrations with other platforms and tools.

Apache Kafka

Kafka Spout for consuming messages from Kafka topics as Storm data sources.

Apache Cassandra

CassandraBolt for writing processed stream data to Cassandra.

Apache Hive

HiveBolt for streaming inserts into Apache Hive tables.

Redis

Redis integration for stateful lookups and caching in Storm bolts.

Elasticsearch

ElasticsearchBolt for indexing stream data into Elasticsearch.

Resources

Get Started 2

Portal, sign-up, and the first successful call

Portal

Portal

GettingStarted

GettingStarted

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

Build 2

SDKs, sample code, and the tooling you integrate with

CodeOfConduct

CodeOfConduct

GitHubRepository

GitHubRepository

Access & Security 3

Authentication, authorization, and security posture

SecurityPolicy

SecurityPolicy

VulnerabilityDisclosure

VulnerabilityDisclosure

DomainSecurity

DomainSecurity

Operate 3

Status, limits, changes, and where to get help

IssueTracker

IssueTracker

ReleaseNotes

ReleaseNotes

Support

Support

Commercial 2

Pricing, plans, and the legal terms of use

License

License

TermsOfService

TermsOfService

Company 2

The organization behind the API

Website

Website

Blog

Blog

Source (apis.yml)

aid: apache-storm
name: Apache Storm
description: Apache Storm is a free and open-source distributed real-time computation system that makes it easy to reliably
  process unbounded streams of data at scale. It provides a simple programming model (topologies with spouts and bolts), guaranteed
  message processing, horizontal scalability, and fault tolerance. Storm integrates with queuing and database technologies
  including Apache Kafka and Apache Cassandra and is governed by the Apache Software Foundation.
type: Index
deliveryModel:
  model: open-core
  license: Apache-2.0
  open_source: true
  commercial: true
  callable_host: false
  label: Open core · an OSS project plus a commercial hosted product
  confidence: high
  source:
  - license
  - openapi
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: freemium
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Freemium
  confidence: medium
  source:
  - plans
  generated: '2026-07-22'
  method: derived
position: Consuming
access: 3rd-Party
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/apache-storm.png
tags:
- Distributed Computing
- Event Processing
- Real-Time
- Stream Processing
- Open-Source
tags_raw:
- Distributed Computing
- Event Processing
- Real-Time
- Stream Processing
- Open Source
created: '2026-03-16'
modified: '2026-05-19'
url: https://raw.githubusercontent.com/api-evangelist/apache-storm/refs/heads/main/apis.yml
specificationVersion: '0.23'
apis:
- aid: apache-storm:apache-storm-topology-api
  name: Apache Storm Topology API
  description: The Storm Topology API provides Java and other language bindings for building real-time processing topologies
    composed of spouts (data sources) and bolts (processing units). It supports various stream groupings, windowing operations,
    Trident micro-batch processing, and DRPC (Distributed Remote Procedure Calls) for synchronous request/response patterns.
  humanURL: https://storm.apache.org/documentation/Tutorial.html
  tags:
  - Java
  - Topology
  - Streaming
  - Processing
  properties:
  - type: Documentation
    url: https://storm.apache.org/documentation/Tutorial.html
  - type: SDKs
    url: https://search.maven.org/search?q=org.apache.storm
    title: Maven Java SDK
- aid: apache-storm:apache-storm-cluster-api
  name: Apache Storm Cluster API
  description: The Cluster API from Apache Storm — 2 operation(s) for cluster.
  humanURL: https://storm.apache.org/releases/current/STORM-UI-REST-API.html
  tags:
  - Cluster
  properties:
  - type: OpenAPI
    url: openapi/apache-storm-cluster-api-openapi.yml
  - type: Documentation
    url: https://storm.apache.org/releases/current/STORM-UI-REST-API.html
- aid: apache-storm:apache-storm-drpc-api
  name: Apache Storm Drpc API
  description: The Drpc API from Apache Storm — 2 operation(s) for drpc.
  humanURL: https://storm.apache.org/releases/current/STORM-UI-REST-API.html
  tags:
  - Drpc
  properties:
  - type: OpenAPI
    url: openapi/apache-storm-drpc-api-openapi.yml
  - type: Documentation
    url: https://storm.apache.org/releases/current/STORM-UI-REST-API.html
- aid: apache-storm:apache-storm-history-api
  name: Apache Storm History API
  description: The History API from Apache Storm — 1 operation(s) for history.
  humanURL: https://storm.apache.org/releases/current/STORM-UI-REST-API.html
  tags:
  - History
  properties:
  - type: OpenAPI
    url: openapi/apache-storm-history-api-openapi.yml
  - type: Documentation
    url: https://storm.apache.org/releases/current/STORM-UI-REST-API.html
- aid: apache-storm:apache-storm-nimbus-api
  name: Apache Storm Nimbus API
  description: The Nimbus API from Apache Storm — 1 operation(s) for nimbus.
  humanURL: https://storm.apache.org/releases/current/STORM-UI-REST-API.html
  tags:
  - Nimbus
  properties:
  - type: OpenAPI
    url: openapi/apache-storm-nimbus-api-openapi.yml
  - type: Documentation
    url: https://storm.apache.org/releases/current/STORM-UI-REST-API.html
- aid: apache-storm:apache-storm-owner-resources-api
  name: Apache Storm Owner Resources API
  description: The Owner Resources API from Apache Storm — 1 operation(s) for owner resources.
  humanURL: https://storm.apache.org/releases/current/STORM-UI-REST-API.html
  tags:
  - Owner Resources
  properties:
  - type: OpenAPI
    url: openapi/apache-storm-owner-resources-api-openapi.yml
  - type: Documentation
    url: https://storm.apache.org/releases/current/STORM-UI-REST-API.html
- aid: apache-storm:apache-storm-supervisor-api
  name: Apache Storm Supervisor API
  description: The Supervisor API from Apache Storm — 2 operation(s) for supervisor.
  humanURL: https://storm.apache.org/releases/current/STORM-UI-REST-API.html
  tags:
  - Supervisor
  properties:
  - type: OpenAPI
    url: openapi/apache-storm-supervisor-api-openapi.yml
  - type: Documentation
    url: https://storm.apache.org/releases/current/STORM-UI-REST-API.html
- aid: apache-storm:apache-storm-topology-api
  name: Apache Storm Topology API
  description: The Topology API from Apache Storm — 14 operation(s) for topology.
  humanURL: https://storm.apache.org/releases/current/STORM-UI-REST-API.html
  tags:
  - Topology
  properties:
  - type: OpenAPI
    url: openapi/apache-storm-topology-api-openapi.yml
  - type: Documentation
    url: https://storm.apache.org/releases/current/STORM-UI-REST-API.html
- aid: apache-storm:apache-storm-topology-workers-api
  name: Apache Storm Topology Workers API
  description: The Topology Workers API from Apache Storm — 1 operation(s) for topology workers.
  humanURL: https://storm.apache.org/releases/current/STORM-UI-REST-API.html
  tags:
  - Topology Workers
  properties:
  - type: OpenAPI
    url: openapi/apache-storm-topology-workers-api-openapi.yml
  - type: Documentation
    url: https://storm.apache.org/releases/current/STORM-UI-REST-API.html
common:
- type: Website
  url: https://www.apache.org/
- type: IssueTracker
  url: https://github.com/apache/storm/issues
- type: SecurityPolicy
  url: https://github.com/apache/storm/blob/master/SECURITY.md
- type: CodeOfConduct
  url: https://github.com/apache/.github/blob/main/.github/CODE_OF_CONDUCT.md
- type: License
  name: Apache-2.0
  url: https://github.com/apache/storm/blob/master/LICENSE
- type: AgenticAccess
  url: agentic-access/apache-storm-agentic-access.yml
- type: VulnerabilityDisclosure
  url: security/apache-storm-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/apache-storm-domain-security.yml
- type: GitHubRepository
  url: https://github.com/apache/storm
- type: Documentation
  url: https://storm.apache.org/documentation/Home.html
- type: Portal
  url: https://storm.apache.org/
- type: GettingStarted
  url: https://storm.apache.org/releases/current/Setting-up-development-environment.html
- type: ReleaseNotes
  url: https://github.com/apache/storm/releases
- type: Support
  url: https://storm.apache.org/contribute/People.html
- type: TermsOfService
  url: https://www.apache.org/licenses/
- type: Features
  data:
  - name: Guaranteed Message Processing
    description: At-least-once processing guarantees through ack/fail tracking mechanism.
  - name: Scalable Topologies
    description: Horizontally scalable stream processing topologies with configurable parallelism.
  - name: Trident API
    description: High-level micro-batch processing abstraction with stateful streaming and exactly-once semantics.
  - name: DRPC
    description: Distributed Remote Procedure Calls for synchronous distributed computation.
  - name: Windowing Operations
    description: Tumbling and sliding window processing over bounded time or count windows.
  - name: Multi-Language Support
    description: Topology components written in Java, Python, Ruby, and other languages via Multilang protocol.
- type: UseCases
  data:
  - name: Real-Time Analytics
    description: Continuous computation over live event streams for operational dashboards.
  - name: ETL Processing
    description: Real-time data transformation and enrichment pipelines.
  - name: Machine Learning Scoring
    description: Online scoring of ML models against streaming feature data.
  - name: Fraud Detection
    description: Low-latency fraud detection rules applied to transaction streams.
- type: Integrations
  data:
  - name: Apache Kafka
    description: Kafka Spout for consuming messages from Kafka topics as Storm data sources.
  - name: Apache Cassandra
    description: CassandraBolt for writing processed stream data to Cassandra.
  - name: Apache Hive
    description: HiveBolt for streaming inserts into Apache Hive tables.
  - name: Redis
    description: Redis integration for stateful lookups and caching in Storm bolts.
  - name: Elasticsearch
    description: ElasticsearchBolt for indexing stream data into Elasticsearch.
- type: Blog
  url: https://storm.apache.org/index.html
maintainers:
- FN: Kin Lane
  email: info@apievangelist.com

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