Cilium website screenshot

Cilium

Cilium is an open source, cloud native solution for providing, securing, and observing network connectivity between workloads, fueled by the revolutionary kernel technology eBPF. Cilium provides network security, load balancing, and observability for Kubernetes clusters.

Cilium publishes 9 APIs on the APIs.io network, including Hubble API, BGP API, Daemon API, and 6 more. Tagged areas include Cloud Native, eBPF, Kubernetes, Networking, and Security.

The Cilium catalog on APIs.io includes 1 event-driven AsyncAPI specification, 1 JSON-LD context, and 2 Spectral governance rulesets.

Cilium’s developer surface includes documentation, getting-started guide, engineering blog, support, changelog, YouTube channel, Stack Overflow tag, and 15 more developer resources.

🌐 Visit website 📡 Source on GitHub
50.4/100 developing ▬ flat Agent 34/100 agent ready Full breakdown ↓
scored 2026-07-28 · rubric v0.6
AccessFreemium
11 APIs
Cloud NativeeBPFKubernetesNetworkingSecurity

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-07-28 · rubric v0.6
Composite quality — 50.4/100 · developing
Contract Quality 15.6 / 25
Developer Ergonomics 5.2 / 20
Commercial Clarity 10.0 / 20
Operational Transparency 6.8 / 13
Governance 6.3 / 12
Discoverability 6.5 / 10
Agent readiness — 34/100 · agent ready
Machine-Readable Contract 18 / 18
Agentic Access Contract 10 / 10
MCP Server 0 / 12
Machine-Readable Auth 0 / 10
Idempotency 0 / 9
Stable Error Semantics 8 / 8
Request/Response Examples 0 / 7
Rate-Limit Signaling 7 / 7
Typed Event Surface 6 / 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
Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/cilium: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

APIs 11

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

Hubble API

The Hubble API is a gRPC-based observability API built on top of Cilium and eBPF that provides deep visibility into network flows, DNS queries, HTTP requests, and service commun...

Tetragon API

The Tetragon gRPC API provides access to eBPF-based security observability and runtime enforcement capabilities. It enables querying of kernel-level events including process exe...

Hubble Relay API

The Hubble Relay API is a gRPC service that aggregates and relays network flow data from multiple Hubble agents running across Kubernetes cluster nodes. It provides a single clu...

Cilium BGP API

BGP control plane peers, routes, and route policies

Cilium Daemon API

Cilium daemon configuration, health, and cluster management

Cilium Endpoint API

Endpoint lifecycle management, configuration, and status

Cilium IPAM API

IP address management and allocation

Cilium Lrp API

The Lrp API from Cilium — 1 operation(s) for lrp.

Cilium Policy API

Network policy, security identities, and FQDN/DNS policy

Cilium Prefilter API

XDP prefilter CIDR management

Cilium Service API

The Service API from Cilium — 2 operation(s) for service.

Scroll for all 11

Open Collections 1

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

Cilium API

OPEN COLLECTION

Pricing Plans 1

Published pricing tiers and plan structures.

Cilium Plans Pricing

2 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Cilium Rate Limits

3 limits

RATE LIMITS

FinOps 1

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

Cilium Finops

FINOPS

Event Specifications 1

AsyncAPI definitions for this provider's event-driven and streaming APIs.

Cilium Hubble Events

The Hubble event streaming API provides real-time observability into network flows, DNS queries, HTTP requests, and service-to-service communication within Kubernetes clusters. ...

ASYNCAPI

Semantic Vocabularies 1

JSON-LD contexts and semantic vocabularies used across these APIs.

Cilium Context

0 classes · 11 properties

JSON-LD

Spectral Rules 2

Spectral governance rulesets for linting and validating these APIs.

Cilium API Rules

6 rules · 6 warnings

SPECTRAL

Cilium API Rules

6 rules · 4 warnings 2 info

SPECTRAL

JSON Schema 1

Standalone JSON Schema definitions for this provider's data models.

Cilium Endpoint

3 properties

JSON SCHEMA

Security Posture 1

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

Cilium Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Agentic Access 1

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

Cilium Agentic Access

41 operations · 15 acting

41 operations · 15 acting

AGENTIC

Resources

Get Started 1

Portal, sign-up, and the first successful call

GettingStarted
GettingStarted

Documentation 4

Reference material describing how the API behaves

Documentation
Documentation
 JSONSchema
JSONSchema
 AsyncAPI
AsyncAPI
 OpenAPI
OpenAPI

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess
AgenticAccess

Design & Contract 2

Pagination, idempotency, versioning, errors, and events

JSONLDContext
JSONLDContext
 Spectral
Spectral

Build 2

SDKs, sample code, and the tooling you integrate with

GitHubOrganization
GitHubOrganization
 GitHubRepository
GitHubRepository

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity
DomainSecurity

Learn 1

Tutorials, courses, talks, and written guidance

YouTube
YouTube

Operate 5

Status, limits, changes, and where to get help

Community
Community
 Support
Support
 Slack
Slack
 ChangeLog
ChangeLog
 StackOverflow
StackOverflow

Commercial 2

Pricing, plans, and the legal terms of use

PrivacyPolicy
PrivacyPolicy
 TermsOfService
TermsOfService

Company 3

The organization behind the API

LinkedIn
LinkedIn
 Website
Website
 Blog
Blog

Source (apis.yml)

apis.yml Raw ↑ 
aid: cilium
url: https://raw.githubusercontent.com/api-evangelist/cilium/refs/heads/main/apis.yml
name: Cilium
tags:
- Cloud Native
- eBPF
- Kubernetes
- Networking
- Security
type: Index
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/cilium.png
access: 3rd-Party
created: '2026-03-16'
modified: '2026-05-19'
position: Consumer
description: Cilium is an open source, cloud native solution for providing, securing, and observing network connectivity between
  workloads, fueled by the revolutionary kernel technology eBPF. Cilium provides network security, load balancing, and observability
  for Kubernetes clusters.
apis:
- aid: cilium:hubble-api
  name: Hubble API
  tags:
  - eBPF
  - Kubernetes
  - Networking
  - Observability
  humanURL: https://docs.cilium.io/en/stable/observability/hubble/index.html
  properties:
  - url: https://docs.cilium.io/en/stable/observability/hubble/index.html
    type: Documentation
  - url: https://docs.cilium.io/en/stable/internals/hubble/
    type: Reference
  - url: asyncapi/cilium-hubble-asyncapi.yml
    type: AsyncAPI
  - url: https://github.com/cilium/hubble
    type: GitHubRepository
  - url: https://github.com/cilium/hubble/releases
    type: ChangeLog
  description: The Hubble API is a gRPC-based observability API built on top of Cilium and eBPF that provides deep visibility
    into network flows, DNS queries, HTTP requests, and service communication within Kubernetes clusters. It exposes Observer
    and Peer gRPC services for querying flows, nodes, namespaces, and server status across single nodes or entire clusters
    via Hubble Relay.
- aid: cilium:tetragon-api
  name: Tetragon API
  tags:
  - eBPF
  - Kubernetes
  - Observability
  - Security
  humanURL: https://tetragon.io/docs/reference/grpc-api/
  properties:
  - url: https://tetragon.io/docs/reference/grpc-api/
    type: Documentation
  - url: https://tetragon.io/docs/
    type: Reference
  - url: https://github.com/cilium/tetragon
    type: GitHubRepository
  - url: https://tetragon.io/docs/getting-started/
    type: GettingStarted
  - url: https://github.com/cilium/tetragon/releases
    type: ChangeLog
  description: The Tetragon gRPC API provides access to eBPF-based security observability and runtime enforcement capabilities.
    It enables querying of kernel-level events including process execution, file access, and network activity, and supports
    defining tracing policies via Kubernetes custom resources for real-time enforcement and event streaming.
- aid: cilium:hubble-relay-api
  name: Hubble Relay API
  tags:
  - gRPC
  - Kubernetes
  - Networking
  - Observability
  humanURL: https://docs.cilium.io/en/stable/observability/hubble/index.html
  properties:
  - url: https://docs.cilium.io/en/stable/observability/hubble/index.html
    type: Documentation
  - url: https://github.com/cilium/cilium/tree/main/api/v1/relay
    type: Reference
  - url: https://github.com/cilium/cilium
    type: GitHubRepository
  - url: https://github.com/cilium/cilium/releases
    type: ChangeLog
  description: The Hubble Relay API is a gRPC service that aggregates and relays network flow data from multiple Hubble agents
    running across Kubernetes cluster nodes. It provides a single cluster-wide endpoint for the Hubble Observer service, enabling
    centralized queries of flow data, DNS events, and HTTP metrics from all nodes through Hubble Relay without connecting
    to each node individually.
- aid: cilium:cilium-bgp-api
  name: Cilium BGP API
  description: BGP control plane peers, routes, and route policies
  humanURL: https://docs.cilium.io/en/stable/api/
  baseURL: https://localhost/v1
  tags:
  - BGP
  properties:
  - type: OpenAPI
    url: openapi/cilium-bgp-api-openapi.yml
  - type: Documentation
    url: https://docs.cilium.io/en/stable/api/
  - type: GettingStarted
    url: https://docs.cilium.io/en/stable/gettingstarted/
  - type: ChangeLog
    url: https://github.com/cilium/cilium/releases
  - type: Documentation
    url: https://docs.cilium.io/en/stable/internals/
- aid: cilium:cilium-daemon-api
  name: Cilium Daemon API
  description: Cilium daemon configuration, health, and cluster management
  humanURL: https://docs.cilium.io/en/stable/api/
  baseURL: https://localhost/v1
  tags:
  - Daemon
  properties:
  - type: OpenAPI
    url: openapi/cilium-daemon-api-openapi.yml
  - type: Documentation
    url: https://docs.cilium.io/en/stable/api/
  - type: GettingStarted
    url: https://docs.cilium.io/en/stable/gettingstarted/
  - type: ChangeLog
    url: https://github.com/cilium/cilium/releases
  - type: Documentation
    url: https://docs.cilium.io/en/stable/internals/
- aid: cilium:cilium-endpoint-api
  name: Cilium Endpoint API
  description: Endpoint lifecycle management, configuration, and status
  humanURL: https://docs.cilium.io/en/stable/api/
  baseURL: https://localhost/v1
  tags:
  - Endpoint
  properties:
  - type: OpenAPI
    url: openapi/cilium-endpoint-api-openapi.yml
  - type: Documentation
    url: https://docs.cilium.io/en/stable/api/
  - type: GettingStarted
    url: https://docs.cilium.io/en/stable/gettingstarted/
  - type: ChangeLog
    url: https://github.com/cilium/cilium/releases
  - type: Documentation
    url: https://docs.cilium.io/en/stable/internals/
- aid: cilium:cilium-ipam-api
  name: Cilium IPAM API
  description: IP address management and allocation
  humanURL: https://docs.cilium.io/en/stable/api/
  baseURL: https://localhost/v1
  tags:
  - IPAM
  properties:
  - type: OpenAPI
    url: openapi/cilium-ipam-api-openapi.yml
  - type: Documentation
    url: https://docs.cilium.io/en/stable/api/
  - type: GettingStarted
    url: https://docs.cilium.io/en/stable/gettingstarted/
  - type: ChangeLog
    url: https://github.com/cilium/cilium/releases
  - type: Documentation
    url: https://docs.cilium.io/en/stable/internals/
- aid: cilium:cilium-lrp-api
  name: Cilium Lrp API
  description: The Lrp API from Cilium — 1 operation(s) for lrp.
  humanURL: https://docs.cilium.io/en/stable/api/
  baseURL: https://localhost/v1
  tags:
  - Lrp
  properties:
  - type: OpenAPI
    url: openapi/cilium-lrp-api-openapi.yml
  - type: Documentation
    url: https://docs.cilium.io/en/stable/api/
  - type: GettingStarted
    url: https://docs.cilium.io/en/stable/gettingstarted/
  - type: ChangeLog
    url: https://github.com/cilium/cilium/releases
  - type: Documentation
    url: https://docs.cilium.io/en/stable/internals/
- aid: cilium:cilium-policy-api
  name: Cilium Policy API
  description: Network policy, security identities, and FQDN/DNS policy
  humanURL: https://docs.cilium.io/en/stable/api/
  baseURL: https://localhost/v1
  tags:
  - Policy
  properties:
  - type: OpenAPI
    url: openapi/cilium-policy-api-openapi.yml
  - type: Documentation
    url: https://docs.cilium.io/en/stable/api/
  - type: GettingStarted
    url: https://docs.cilium.io/en/stable/gettingstarted/
  - type: ChangeLog
    url: https://github.com/cilium/cilium/releases
  - type: Documentation
    url: https://docs.cilium.io/en/stable/internals/
- aid: cilium:cilium-prefilter-api
  name: Cilium Prefilter API
  description: XDP prefilter CIDR management
  humanURL: https://docs.cilium.io/en/stable/api/
  baseURL: https://localhost/v1
  tags:
  - Prefilter
  properties:
  - type: OpenAPI
    url: openapi/cilium-prefilter-api-openapi.yml
  - type: Documentation
    url: https://docs.cilium.io/en/stable/api/
  - type: GettingStarted
    url: https://docs.cilium.io/en/stable/gettingstarted/
  - type: ChangeLog
    url: https://github.com/cilium/cilium/releases
  - type: Documentation
    url: https://docs.cilium.io/en/stable/internals/
- aid: cilium:cilium-service-api
  name: Cilium Service API
  description: The Service API from Cilium — 2 operation(s) for service.
  humanURL: https://docs.cilium.io/en/stable/api/
  baseURL: https://localhost/v1
  tags:
  - Service
  properties:
  - type: OpenAPI
    url: openapi/cilium-service-api-openapi.yml
  - type: Documentation
    url: https://docs.cilium.io/en/stable/api/
  - type: GettingStarted
    url: https://docs.cilium.io/en/stable/gettingstarted/
  - type: ChangeLog
    url: https://github.com/cilium/cilium/releases
  - type: Documentation
    url: https://docs.cilium.io/en/stable/internals/
common:
- type: AgenticAccess
  url: agentic-access/cilium-agentic-access.yml
- type: DomainSecurity
  url: security/cilium-domain-security.yml
- type: LinkedIn
  url: https://www.linkedin.com/company/cilium
- type: Website
  url: https://cilium.io/
- type: Documentation
  url: https://docs.cilium.io/
- type: GettingStarted
  url: https://docs.cilium.io/en/stable/gettingstarted/
- type: GitHubOrganization
  url: https://github.com/cilium
- type: GitHubRepository
  url: https://github.com/cilium/cilium
- type: Blog
  url: https://cilium.io/blog/
- type: Community
  url: https://cilium.io/get-involved/
- type: Support
  url: https://cilium.io/get-help/
- type: PrivacyPolicy
  url: https://cilium.io/privacy/
- type: Slack
  url: https://slack.cilium.io/
- type: ChangeLog
  url: https://github.com/cilium/cilium/releases
- type: YouTube
  url: https://www.youtube.com/@CiliumProject
- type: TermsOfService
  url: https://cilium.io/terms/
- type: StackOverflow
  url: https://stackoverflow.com/questions/tagged/cilium
- type: JSONLDContext
  url: json-ld/cilium-context.jsonld
- type: JSONSchema
  url: json-schema/cilium-endpoint-schema.json
- type: AsyncAPI
  url: asyncapi/cilium-hubble-asyncapi.yml
- type: OpenAPI
  url: openapi/cilium-api-openapi.yml
- type: Spectral
  url: spectral/cilium-spectral.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
specificationVersion: '0.20'