Apache Flink website screenshot

Apache Flink

Apache Flink is an open-source framework and distributed processing engine for stateful computations over unbounded and bounded data streams. It is designed to run in all common cluster environments and to perform computations at in-memory speed and at any scale. Flink exposes a REST API on the JobManager Dispatcher that allows external systems to query cluster status, submit and manage jobs, trigger savepoints and checkpoints, upload and run JARs, and inspect metrics, accumulators, and exception histories. The same REST endpoints power the Flink Web UI.

Apache Flink publishes 7 APIs on the APIs.io network, including Checkpoints API, Cluster API, Datasets API, and 4 more. Tagged areas include Big Data, Distributed Computing, Real-Time Analytics, Stream Processing, and Workflows.

Apache Flink’s developer surface includes documentation, engineering blog, and 10 more developer resources.

🌐 Visit website 📡 Source on GitHub
24.6/100 emerging ▬ flat Agent 19/100 agent aware self hosted · Apache-2.0 Full breakdown ↓
scored 2026-09-14 · rubric v0.22.0
AccessFreemium
1 APIs
Big DataDistributed ComputingReal-Time AnalyticsStream ProcessingWorkflows

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-09-14 · rubric v0.22.0
Composite quality — 24.6/100 · emerging
Contract Quality 8.0 / 20
Developer Ergonomics 2.3 / 16
Access Clarity 2.5 / 16
Operational Transparency 1.4 / 10
Contract Governance 0.0 / 10
Discoverability 4.7 / 8
Open Source Surface 4.0 / 10
Create-or-Update Ergonomics 0.0 / 10
Agent readiness — 19/100 · agent aware
Machine-Readable Contract 18 / 18
Agentic Access Contract 10 / 10
Documented Reversibility 6 / 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/flink: 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 7

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

Apache Flink Checkpoints API

Checkpoint configuration, status, and details.

Apache Flink Cluster API

Cluster lifecycle and configuration.

Apache Flink Datasets API

Cluster dataset listing and deletion.

Apache Flink JARs API

JAR upload, listing, run, and delete.

Apache Flink JobManager API

JobManager configuration, environment, logs, metrics, and threads.

Apache Flink Jobs API

Job lifecycle and inspection.

Apache Flink TaskManagers API

TaskManager listing and inspection.

Scroll for all 7

Open Collections 8

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

API Collection

OPEN COLLECTION

Apache Flink REST Checkpoints API

OPEN COLLECTION

Apache Flink REST Checkpoints Cluster API

OPEN COLLECTION

Apache Flink REST Checkpoints Datasets API

OPEN COLLECTION

Apache Flink REST Checkpoints JARs API

OPEN COLLECTION

Apache Flink REST Checkpoints JobManager API

OPEN COLLECTION

Apache Flink REST Checkpoints Jobs API

OPEN COLLECTION

Apache Flink REST Checkpoints TaskManagers API

OPEN COLLECTION

Scroll for all 8

Pricing Plans 1

Published pricing tiers and plan structures.

Flink Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Flink Rate Limits

5 limits

RATE LIMITS

FinOps 1

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

Flink Finops

FINOPS

Security Posture 2

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

Flink Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Flink Vulnerability Disclosure

security.txt · contact published

SECURITY

Agentic Access 1

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

Flink Agentic Access

29 operations · 7 acting · 2 human-in-the-loop

29 operations · 7 acting

AGENTIC

Resources

Documentation 3

Reference material describing how the API behaves

ContributionGuide
ContributionGuide
 Documentation
Documentation
 RESTAPIDocumentation
RESTAPIDocumentation

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 2

Authentication, authorization, and security posture

VulnerabilityDisclosure
VulnerabilityDisclosure
 DomainSecurity
DomainSecurity

Operate 1

Status, limits, changes, and where to get help

Community
Community

Commercial 1

Pricing, plans, and the legal terms of use

License
License

Company 2

The organization behind the API

Website
Website
 Blog
Blog

Source (apis.yml)

apis.yml Raw ↑ 
aid: flink
name: Apache Flink
description: Apache Flink is an open-source framework and distributed processing engine for stateful computations over unbounded
  and bounded data streams. It is designed to run in all common cluster environments and to perform computations at in-memory
  speed and at any scale. Flink exposes a REST API on the JobManager Dispatcher that allows external systems to query cluster
  status, submit and manage jobs, trigger savepoints and checkpoints, upload and run JARs, and inspect metrics, accumulators,
  and exception histories. The same REST endpoints power the Flink Web UI.
type: Index
deliveryModel:
  model: self-hosted
  license: Apache-2.0
  open_source: true
  commercial: false
  callable_host: false
  label: Self-hosted open source · you run it yourself
  confidence: high
  source:
  - license
  - openapi
  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
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/flink.png
url: https://raw.githubusercontent.com/api-evangelist/flink/refs/heads/main/apis.yml
created: '2025-01-01'
modified: '2026-05-19'
specificationVersion: '0.23'
tags:
- Big Data
- Distributed Computing
- Real-Time Analytics
- Stream Processing
- Workflows
apis:
- aid: flink:flink-checkpoints-api
  name: Apache Flink Checkpoints API
  description: Checkpoint configuration, status, and details.
  humanURL: https://nightlies.apache.org/flink/flink-docs-stable/docs/ops/rest_api/
  baseURL: http://localhost:8081
  tags:
  - Checkpoints
  properties:
  - type: OpenAPI
    url: openapi/flink-checkpoints-api-openapi.yml
  - type: Documentation
    url: https://nightlies.apache.org/flink/flink-docs-stable/docs/ops/rest_api/
  - type: Website
    url: https://flink.apache.org/
  - type: GitHubRepository
    url: https://github.com/apache/flink
- aid: flink:flink-cluster-api
  name: Apache Flink Cluster API
  description: Cluster lifecycle and configuration.
  humanURL: https://nightlies.apache.org/flink/flink-docs-stable/docs/ops/rest_api/
  baseURL: http://localhost:8081
  tags:
  - Cluster
  properties:
  - type: OpenAPI
    url: openapi/flink-cluster-api-openapi.yml
  - type: Documentation
    url: https://nightlies.apache.org/flink/flink-docs-stable/docs/ops/rest_api/
  - type: Website
    url: https://flink.apache.org/
  - type: GitHubRepository
    url: https://github.com/apache/flink
- aid: flink:flink-datasets-api
  name: Apache Flink Datasets API
  description: Cluster dataset listing and deletion.
  humanURL: https://nightlies.apache.org/flink/flink-docs-stable/docs/ops/rest_api/
  baseURL: http://localhost:8081
  tags:
  - Datasets
  properties:
  - type: OpenAPI
    url: openapi/flink-datasets-api-openapi.yml
  - type: Documentation
    url: https://nightlies.apache.org/flink/flink-docs-stable/docs/ops/rest_api/
  - type: Website
    url: https://flink.apache.org/
  - type: GitHubRepository
    url: https://github.com/apache/flink
- aid: flink:flink-jars-api
  name: Apache Flink JARs API
  description: JAR upload, listing, run, and delete.
  humanURL: https://nightlies.apache.org/flink/flink-docs-stable/docs/ops/rest_api/
  baseURL: http://localhost:8081
  tags:
  - JARs
  properties:
  - type: OpenAPI
    url: openapi/flink-jars-api-openapi.yml
  - type: Documentation
    url: https://nightlies.apache.org/flink/flink-docs-stable/docs/ops/rest_api/
  - type: Website
    url: https://flink.apache.org/
  - type: GitHubRepository
    url: https://github.com/apache/flink
- aid: flink:flink-jobmanager-api
  name: Apache Flink JobManager API
  description: JobManager configuration, environment, logs, metrics, and threads.
  humanURL: https://nightlies.apache.org/flink/flink-docs-stable/docs/ops/rest_api/
  baseURL: http://localhost:8081
  tags:
  - JobManager
  properties:
  - type: OpenAPI
    url: openapi/flink-jobmanager-api-openapi.yml
  - type: Documentation
    url: https://nightlies.apache.org/flink/flink-docs-stable/docs/ops/rest_api/
  - type: Website
    url: https://flink.apache.org/
  - type: GitHubRepository
    url: https://github.com/apache/flink
- aid: flink:flink-jobs-api
  name: Apache Flink Jobs API
  description: Job lifecycle and inspection.
  humanURL: https://nightlies.apache.org/flink/flink-docs-stable/docs/ops/rest_api/
  baseURL: http://localhost:8081
  tags:
  - Job
  tags_raw:
  - Jobs
  properties:
  - type: OpenAPI
    url: openapi/flink-jobs-api-openapi.yml
  - type: Documentation
    url: https://nightlies.apache.org/flink/flink-docs-stable/docs/ops/rest_api/
  - type: Website
    url: https://flink.apache.org/
  - type: GitHubRepository
    url: https://github.com/apache/flink
- aid: flink:flink-taskmanagers-api
  name: Apache Flink TaskManagers API
  description: TaskManager listing and inspection.
  humanURL: https://nightlies.apache.org/flink/flink-docs-stable/docs/ops/rest_api/
  baseURL: http://localhost:8081
  tags:
  - TaskManagers
  properties:
  - type: OpenAPI
    url: openapi/flink-taskmanagers-api-openapi.yml
  - type: Documentation
    url: https://nightlies.apache.org/flink/flink-docs-stable/docs/ops/rest_api/
  - type: Website
    url: https://flink.apache.org/
  - type: GitHubRepository
    url: https://github.com/apache/flink
common:
- type: CodeOfConduct
  url: https://github.com/apache/.github/blob/main/.github/CODE_OF_CONDUCT.md
- type: ContributionGuide
  url: https://github.com/apache/flink/blob/master/.github/CONTRIBUTING.md
- type: License
  name: Apache-2.0
  url: https://github.com/apache/flink/blob/master/LICENSE
- type: AgenticAccess
  url: agentic-access/flink-agentic-access.yml
- type: VulnerabilityDisclosure
  url: security/flink-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/flink-domain-security.yml
- type: Website
  url: https://flink.apache.org/
- type: Documentation
  url: https://nightlies.apache.org/flink/flink-docs-stable/
- type: RESTAPIDocumentation
  url: https://nightlies.apache.org/flink/flink-docs-stable/docs/ops/rest_api/
- type: GitHubRepository
  url: https://github.com/apache/flink
- type: Blog
  url: https://flink.apache.org/posts/
- type: Community
  url: https://flink.apache.org/community/
- type: Integrations
  url: https://flink.apache.org/ecosystem/
integrations:
- name: 2020/
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

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