Apache Cassandra

Apache Cassandra is a highly scalable, distributed open-source NoSQL database designed to handle massive amounts of data across many commodity servers, providing high availability with no single point of failure. It is governed by the Apache Software Foundation (ASF) under the Apache License 2.0 and is used in production by Netflix, Apple, Bloomberg, Backblaze, and many others. Cassandra exposes its CQL native protocol for clients and a family of HTTP, REST, GraphQL, Document, and gRPC APIs via the Stargate data gateway.

Apache Cassandra publishes 12 APIs on the APIs.io network, including Cassandra REST API (Stargate), Columns API, Indexes API, and 9 more. Tagged areas include Apache, Big Data, Database, Distributed, and NoSQL.

Apache Cassandra’s developer surface includes authentication, documentation, getting-started guide, GitHub presence, engineering blog, Stack Overflow tag, YouTube channel, and 24 more developer resources.

🌐 Visit website 📡 Source on GitHub

38.0/100 thin ▬ flat Agent 20/100 agent aware Front door AI 1/6 silent open core · Apache-2.0 Full breakdown ↓
scored 2026-09-25 · rubric v0.23.0

AccessFreemiumSelf serve⚡ Free to try

1 APIs 21 Features 12 Use Cases

Apache Big Data Database Distributed NoSQL Open Source

Kin Score

Kin Score How this is scored →
scored 2026-09-25 · rubric v0.23.0

Composite quality — 38.0/100 · thin

Contract Quality 6.9 / 16

Developer Ergonomics 4.3 / 13

Access Clarity 3.4 / 13

Operational Transparency 2.0 / 8

Contract Governance 0.0 / 8

Discoverability 3.7 / 7

Regulatory Posture 3.2 / 15

Open Source Surface 7.5 / 10

Create-or-Update Ergonomics 2.2 / 10

Agent readiness — 20/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 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

Regulatory Posture applies to this provider. Its tags matched the Horizontal (data, software, accessibility, platform) regime, so Regulatory Posture carries 15 points of the composite. If this regime is wrong for your business, say so on your provider repo — the applicability map is public and we will correct it.

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 65 points between them, because both conditional facets apply and carry 35 points together. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 65% 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/cassandra: 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 12

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

Apache Cassandra CQL Native Protocol

Cassandra Query Language (CQL) is the primary interface to Apache Cassandra. Clients speak the binary CQL native protocol over TCP (default port 9042). Official drivers are main...

Cassandra REST API (Stargate)

HTTP/JSON REST API for Cassandra provided by the Stargate data gateway. Enables CRUD operations and SQL-like query via REST without the CQL driver.

Cassandra GraphQL API (Stargate)

GraphQL endpoint for Cassandra, enabling flexible, typed queries and mutations against Cassandra tables through the Stargate gateway.

Cassandra Document API (Stargate)

Schemaless Document API that stores JSON documents in Cassandra, offering a MongoDB-like developer experience backed by Cassandra.

Cassandra gRPC API (Stargate)

High-performance gRPC API for Cassandra through Stargate, designed for low-latency service-to-service communication.

Cassandra JMX Management Interface

Java Management Extensions (JMX) interface for monitoring and administering Cassandra nodes, including metrics, compaction, repairs, and configuration.

Apache Cassandra Columns API

The Columns API from Apache Cassandra — 2 operation(s) for columns.

Apache Cassandra Indexes API

The Indexes API from Apache Cassandra — 2 operation(s) for indexes.

Apache Cassandra Keyspaces API

The Keyspaces API from Apache Cassandra — 2 operation(s) for keyspaces.

Apache Cassandra Rows API

The Rows API from Apache Cassandra — 3 operation(s) for rows.

Apache Cassandra Tables API

The Tables API from Apache Cassandra — 2 operation(s) for tables.

Apache Cassandra Types API

The Types API from Apache Cassandra — 2 operation(s) for types.

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Open Collections 8

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

API Collection

OPEN COLLECTION

Apache Cassandra REST API (via Stargate) Columns API

OPEN COLLECTION

Apache Cassandra REST API (via Stargate) Columns Indexes API

OPEN COLLECTION

Apache Cassandra REST API (via Stargate) Columns Keyspaces API

OPEN COLLECTION

Apache Cassandra REST API (via Stargate) Columns Rows API

OPEN COLLECTION

Apache Cassandra REST API (via Stargate) Columns Tables API

OPEN COLLECTION

Apache Cassandra REST API (via Stargate) Columns Types API

OPEN COLLECTION

Apache Cassandra REST API (via Stargate)

OPEN COLLECTION

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GraphQL 1

GraphQL schemas published by this provider.

Apache Cassandra GraphQL API

GraphQL endpoint for Cassandra, enabling flexible, typed queries and mutations against Cassandra tables through the Stargate gateway.

GRAPHQL

Pricing Plans 1

Published pricing tiers and plan structures.

Cassandra Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Cassandra Rate Limits

5 limits

RATE LIMITS

FinOps 1

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

Cassandra Finops

FINOPS

Features 21

Notable capabilities this provider offers.

Distributed

Masterless

Linear Scalability

Multi-Datacenter Replication

High Availability

Fault Tolerance

Tunable Consistency

CQL Query Language

Secondary Indexes

Materialized Views

User Defined Types

User Defined Functions

Vector Search

Time Series Storage

Cross-Region Replication

Role Based Access Control

TLS/SSL Encryption

At-Rest Encryption

Snapshot Backups

Incremental Repairs

Apache License 2.0

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Security Posture 3

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

Cassandra Authentication

apiKey · 1 scheme

SECURITY

Cassandra Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Cassandra Vulnerability Disclosure

security.txt · contact published

SECURITY

Agentic Access 1

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

Cassandra Agentic Access

26 operations · 15 acting

AGENTIC

Use Cases 12

What developers build with this provider.

Event Logging

IoT Telemetry

Time Series Data

Product Catalogs

Messaging Platforms

Fraud Detection

Recommendation Engines

Activity Feeds

Audit Logs

Real-Time Analytics

Mobile Application Backends

Vector Similarity Search

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Resources

Get Started 2

Portal, sign-up, and the first successful call

GettingStarted

GettingStarted

PackageRegistry

PackageRegistry

Documentation 2

Reference material describing how the API behaves

ContributionGuide

ContributionGuide

Documentation

Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

Build 3

SDKs, sample code, and the tooling you integrate with

CodeOfConduct

CodeOfConduct

SourceCode

SourceCode

GitHub

GitHub

Access & Security 5

Authentication, authorization, and security posture

SecurityPolicy

SecurityPolicy

VulnerabilityDisclosure

VulnerabilityDisclosure

DomainSecurity

DomainSecurity

Authentication

Authentication

SecurityPolicy

SecurityPolicy

Learn 1

Tutorials, courses, talks, and written guidance

YouTube

YouTube

Operate 4

Status, limits, changes, and where to get help

IssueTracker

Community

Slack

StackOverflow

Commercial 3

Pricing, plans, and the legal terms of use

License

License

PrivacyPolicy

PrivacyPolicy

TermsOfService

TermsOfService

Company 3

The organization behind the API

Website

Website

Blog

Blog

LinkedIn

Other 7

Properties that don't map to a standard resource type

Download

MailingList

DockerHub

Governance

Ecosystem

ThirdParty

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Source (apis.yml)

aid: cassandra
url: https://raw.githubusercontent.com/api-evangelist/cassandra/refs/heads/main/apis.yml
name: Apache Cassandra
tags:
- Apache
- Big Data
- Database
- Distributed
- NoSQL
- Open Source
tags_raw:
- Apache
- Big Data
- Database
- Distributed
- NoSQL
- Open Source
- Open-Source
type: Index
deliveryModel:
  model: open-core
  license: Apache-2.0
  license_evidence:
    repo: apache/cassandra
    spdx: Apache-2.0
    stars: 10103
  open_source: true
  commercial: true
  callable_host: false
  label: Open core · an OSS project plus a commercial hosted product
  confidence: medium
  source:
  - openapi
  - pricing
  - repository-license
  generated: '2026-09-25'
  method: derived
accessModel:
  pricing: freemium
  onboarding: self-serve
  trial: false
  try_now: true
  public: false
  label: Freemium · Self-serve signup
  confidence: medium
  source:
  - plans
  - authentication
  - security
  generated: '2026-09-03'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/cassandra.png
access: 3rd-Party
created: '2024-01-01'
modified: '2026-04-23'
position: Consuming
description: Apache Cassandra is a highly scalable, distributed open-source NoSQL database designed to handle massive amounts
  of data across many commodity servers, providing high availability with no single point of failure. It is governed by the
  Apache Software Foundation (ASF) under the Apache License 2.0 and is used in production by Netflix, Apple, Bloomberg, Backblaze,
  and many others. Cassandra exposes its CQL native protocol for clients and a family of HTTP, REST, GraphQL, Document, and
  gRPC APIs via the Stargate data gateway.
apis:
- aid: cassandra:cassandra-cql-native-protocol
  name: Apache Cassandra CQL Native Protocol
  tags:
  - CQL
  - Database
  - Native Protocol
  - Query
  humanURL: https://cassandra.apache.org/doc/latest/cassandra/cql/
  properties:
  - url: https://cassandra.apache.org/doc/latest/cassandra/cql/
    type: Documentation
  - url: https://github.com/apache/cassandra/blob/trunk/doc/native_protocol_v5.spec
    type: Specification
  - url: https://cassandra.apache.org/doc/latest/cassandra/cql/ddl.html
    type: Reference
  description: Cassandra Query Language (CQL) is the primary interface to Apache Cassandra. Clients speak the binary CQL native
    protocol over TCP (default port 9042). Official drivers are maintained for Java, Python, Go, C/C++, C#, Node.js, Ruby,
    and Rust.
- aid: cassandra:cassandra-rest-api-stargate
  name: Cassandra REST API (Stargate)
  tags:
  - Database
  - REST
  - Stargate
  humanURL: https://stargate.io/docs/latest/develop/api-rest/
  properties:
  - url: https://stargate.io/docs/latest/develop/api-rest/
    type: Documentation
  - url: https://stargate.io/docs/latest/develop/api-rest/swagger.html
    type: Swagger
  - url: https://github.com/stargate/stargate
    type: SourceCode
  description: HTTP/JSON REST API for Cassandra provided by the Stargate data gateway. Enables CRUD operations and SQL-like
    query via REST without the CQL driver.
- aid: cassandra:cassandra-graphql-api-stargate
  name: Cassandra GraphQL API (Stargate)
  tags:
  - Database
  - GraphQL
  - Stargate
  humanURL: https://stargate.io/docs/latest/develop/api-graphql/
  properties:
  - url: https://stargate.io/docs/latest/develop/api-graphql/
    type: Documentation
  - url: https://stargate.io/docs/latest/develop/api-graphql/graphql-using.html
    type: Reference
  - url: graphql/cassandra-graphql.md
    type: GraphQL
  description: GraphQL endpoint for Cassandra, enabling flexible, typed queries and mutations against Cassandra tables through
    the Stargate gateway.
- aid: cassandra:cassandra-document-api-stargate
  name: Cassandra Document API (Stargate)
  tags:
  - Database
  - Documents
  - JSON
  - Stargate
  tags_raw:
  - Database
  - Document
  - JSON
  - Stargate
  humanURL: https://stargate.io/docs/latest/develop/api-doc/
  properties:
  - url: https://stargate.io/docs/latest/develop/api-doc/
    type: Documentation
  - url: https://stargate.io/docs/latest/develop/api-doc/doc-using.html
    type: Reference
  description: Schemaless Document API that stores JSON documents in Cassandra, offering a MongoDB-like developer experience
    backed by Cassandra.
- aid: cassandra:cassandra-grpc-api-stargate
  name: Cassandra gRPC API (Stargate)
  tags:
  - Database
  - gRPC
  - Stargate
  humanURL: https://stargate.io/docs/latest/develop/api-grpc/
  properties:
  - url: https://stargate.io/docs/latest/develop/api-grpc/
    type: Documentation
  - url: https://github.com/stargate/stargate/tree/main/grpc/proto
    type: Protocol
  description: High-performance gRPC API for Cassandra through Stargate, designed for low-latency service-to-service communication.
- aid: cassandra:cassandra-jmx-metrics
  name: Cassandra JMX Management Interface
  tags:
  - JMX
  - Management
  - Metrics
  - Monitoring
  humanURL: https://cassandra.apache.org/doc/latest/cassandra/operating/metrics.html
  properties:
  - url: https://cassandra.apache.org/doc/latest/cassandra/operating/metrics.html
    type: Documentation
  - url: https://cassandra.apache.org/doc/latest/cassandra/operating/
    type: OperationsGuide
  description: Java Management Extensions (JMX) interface for monitoring and administering Cassandra nodes, including metrics,
    compaction, repairs, and configuration.
- aid: cassandra:cassandra-columns-api
  name: Apache Cassandra Columns API
  description: The Columns API from Apache Cassandra — 2 operation(s) for columns.
  humanURL: https://cassandra.apache.org/doc/latest/cassandra/cql/
  tags:
  - Columns
  properties:
  - type: OpenAPI
    url: openapi/cassandra-columns-api-openapi.yml
- aid: cassandra:cassandra-indexes-api
  name: Apache Cassandra Indexes API
  description: The Indexes API from Apache Cassandra — 2 operation(s) for indexes.
  humanURL: https://cassandra.apache.org/doc/latest/cassandra/cql/
  tags:
  - Index
  tags_raw:
  - Indexes
  properties:
  - type: OpenAPI
    url: openapi/cassandra-indexes-api-openapi.yml
- aid: cassandra:cassandra-keyspaces-api
  name: Apache Cassandra Keyspaces API
  description: The Keyspaces API from Apache Cassandra — 2 operation(s) for keyspaces.
  humanURL: https://cassandra.apache.org/doc/latest/cassandra/cql/
  tags:
  - Keyspaces
  properties:
  - type: OpenAPI
    url: openapi/cassandra-keyspaces-api-openapi.yml
- aid: cassandra:cassandra-rows-api
  name: Apache Cassandra Rows API
  description: The Rows API from Apache Cassandra — 3 operation(s) for rows.
  humanURL: https://cassandra.apache.org/doc/latest/cassandra/cql/
  tags:
  - Rows
  properties:
  - type: OpenAPI
    url: openapi/cassandra-rows-api-openapi.yml
- aid: cassandra:cassandra-tables-api
  name: Apache Cassandra Tables API
  description: The Tables API from Apache Cassandra — 2 operation(s) for tables.
  humanURL: https://cassandra.apache.org/doc/latest/cassandra/cql/
  tags:
  - Tables
  properties:
  - type: OpenAPI
    url: openapi/cassandra-tables-api-openapi.yml
- aid: cassandra:cassandra-types-api
  name: Apache Cassandra Types API
  description: The Types API from Apache Cassandra — 2 operation(s) for types.
  humanURL: https://cassandra.apache.org/doc/latest/cassandra/cql/
  tags:
  - Types
  properties:
  - type: OpenAPI
    url: openapi/cassandra-types-api-openapi.yml
common:
- type: SecurityPolicy
  url: https://github.com/apache/cassandra/blob/trunk/SECURITY.md
- type: CodeOfConduct
  url: https://github.com/apache/.github/blob/main/.github/CODE_OF_CONDUCT.md
- type: ContributionGuide
  url: https://github.com/apache/cassandra/blob/trunk/CONTRIBUTING.md
- type: AgenticAccess
  url: agentic-access/cassandra-agentic-access.yml
- type: VulnerabilityDisclosure
  url: security/cassandra-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/cassandra-domain-security.yml
- type: Authentication
  url: authentication/cassandra-authentication.yml
- type: Website
  url: https://cassandra.apache.org/
- type: Documentation
  url: https://cassandra.apache.org/doc/latest/
- type: GettingStarted
  url: https://cassandra.apache.org/doc/latest/cassandra/getting_started/
- type: Download
  url: https://cassandra.apache.org/download/
- type: SourceCode
  url: https://github.com/apache/cassandra
- type: GitHub
  url: https://github.com/apache/cassandra
- type: IssueTracker
  url: https://issues.apache.org/jira/projects/CASSANDRA
- type: Blog
  url: https://cassandra.apache.org/blog/
- type: Community
  url: https://cassandra.apache.org/community/
- type: MailingList
  url: https://cassandra.apache.org/community/#discussions
- type: Slack
  url: https://cassandra.apache.org/community/#slack
- type: StackOverflow
  url: https://stackoverflow.com/questions/tagged/cassandra
- type: X
  url: https://twitter.com/cassandra
- type: LinkedIn
  url: https://www.linkedin.com/company/apache-cassandra/
- type: YouTube
  url: https://www.youtube.com/@PlanetCassandra
- type: DockerHub
  url: https://hub.docker.com/_/cassandra
- type: PackageRegistry
  url: https://central.sonatype.com/artifact/org.apache.cassandra/cassandra-all
- type: License
  url: https://www.apache.org/licenses/LICENSE-2.0
- type: Governance
  url: https://www.apache.org/foundation/governance/
- type: SecurityPolicy
  url: https://cassandra.apache.org/_/security.html
- type: PrivacyPolicy
  url: https://www.apache.org/privacy/
- type: TermsOfService
  url: https://www.apache.org/foundation/license-faq.html
- type: Ecosystem
  url: https://cassandra.apache.org/_/ecosystem.html
- type: ThirdParty
  url: https://cassandra.apache.org/_/ecosystem.html
- name: Features
  type: Features
  data:
  - name: Distributed
  - name: Masterless
  - name: Linear Scalability
  - name: Multi-Datacenter Replication
  - name: High Availability
  - name: Fault Tolerance
  - name: Tunable Consistency
  - name: CQL Query Language
  - name: Secondary Indexes
  - name: Materialized Views
  - name: User Defined Types
  - name: User Defined Functions
  - name: Vector Search
  - name: Time Series Storage
  - name: Cross-Region Replication
  - name: Role Based Access Control
  - name: TLS/SSL Encryption
  - name: At-Rest Encryption
  - name: Snapshot Backups
  - name: Incremental Repairs
  - name: Apache License 2.0
- name: UseCases
  type: UseCases
  data:
  - name: Event Logging
  - name: IoT Telemetry
  - name: Time Series Data
  - name: Product Catalogs
  - name: Messaging Platforms
  - name: Fraud Detection
  - name: Recommendation Engines
  - name: Activity Feeds
  - name: Audit Logs
  - name: Real-Time Analytics
  - name: Mobile Application Backends
  - name: Vector Similarity Search
maintainers:
- FN: Apache Cassandra Community
  email: dev@cassandra.apache.org
specificationVersion: '0.23'

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