Linkerd

Service mesh without the mess. Linkerd adds security, observability, and reliability to any Kubernetes cluster without the complexity of bloat of other meshes.

Linkerd publishes 9 APIs on the APIs.io network, including Discovery API, Edges API, Gateways API, and 6 more. Tagged areas include Kubernetes, mTLS, Observability, Security, and Service Mesh.

The Linkerd catalog on APIs.io includes 1 JSON-LD context and 1 Spectral governance ruleset.

Linkerd’s developer surface includes documentation, getting-started guide, engineering blog, changelog, support, release notes, Stack Overflow tag, and 18 more developer resources.

🌐 Visit website 📡 Source on GitHub

38.6/100 thin ▬ flat Agent 20/100 agent aware open core · Apache-2.0 Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

AccessFreemium

3 APIs

Kubernetes mTLS Observability Security Service Mesh

Kin Score

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

Composite quality — 38.6/100 · thin

Contract Quality 11.3 / 20

Developer Ergonomics 5.7 / 16

Access Clarity 4.2 / 16

Operational Transparency 3.8 / 10

Contract Governance 0.9 / 10

Discoverability 4.4 / 8

Open Source Surface 5.0 / 10

Create-or-Update Ergonomics 0.0 / 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 0 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 7 / 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/linkerd: 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 11

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

Linkerd Proxy Control Plane API

The Linkerd Proxy Control Plane gRPC API defines the protobuf service contracts used by the data-plane proxy to communicate with the control plane. It includes the Destination A...

Linkerd Multicluster API

The Linkerd Multicluster extension provides Kubernetes CRDs and a gateway component that enables transparent, secure cross-cluster service communication. It uses mTLS to authent...

Linkerd Discovery API

API resource discovery

Linkerd Edges API

Connection topology between resources

Linkerd Gateways API

Multicluster gateway metrics

Linkerd Health API

Health and readiness check endpoints

Linkerd Lifecycle API

Proxy lifecycle management endpoints

Linkerd Metrics API

Prometheus metrics endpoints

Linkerd Routes API

Per-route metrics

Linkerd Statistics API

Resource statistics and golden metrics

Linkerd Tap API

Real-time traffic inspection

Scroll for all 11

Open Collections 13

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

API Collection

OPEN COLLECTION

Linkerd Proxy Admin Discovery API

OPEN COLLECTION

Linkerd Proxy Admin Discovery Edges API

OPEN COLLECTION

Linkerd Proxy Admin Discovery Gateways API

OPEN COLLECTION

Linkerd Proxy Admin Discovery Health API

OPEN COLLECTION

Linkerd Proxy Admin Discovery Lifecycle API

OPEN COLLECTION

Linkerd Proxy Admin Discovery Metrics API

OPEN COLLECTION

Linkerd Proxy Admin API

OPEN COLLECTION

Linkerd Proxy Admin Discovery Routes API

OPEN COLLECTION

Linkerd Proxy Admin Discovery Statistics API

OPEN COLLECTION

Linkerd Proxy Admin Discovery Tap API

OPEN COLLECTION

Linkerd Tap API

OPEN COLLECTION

Linkerd Viz Metrics API

OPEN COLLECTION

Scroll for all 13

Pricing Plans 1

Published pricing tiers and plan structures.

Linkerd Plans Pricing

5 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Linkerd Rate Limits

4 limits

RATE LIMITS

FinOps 1

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

Linkerd Finops

FINOPS

Semantic Vocabularies 1

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

Linkerd Context

0 classes · 6 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Linkerd API Rules

6 rules · 5 warnings 1 info

SPECTRAL

JSON Schema 5

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

Linkerd Edge

5 properties

JSON SCHEMA

Linkerd Gateway

8 properties

JSON SCHEMA

Linkerd ServiceProfile

4 properties

JSON SCHEMA

Linkerd Stat Summary

2 properties

JSON SCHEMA

Linkerd Tap Event

9 properties

JSON SCHEMA

Security Posture 1

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

Linkerd Domain Security

TLSv1.3

SECURITY

Agentic Access 1

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

Linkerd Agentic Access

12 operations · 7 acting · 1 human-in-the-loop

12 operations · 7 acting

AGENTIC

Resources

Get Started 1

Portal, sign-up, and the first successful call

GettingStarted

GettingStarted

Documentation 3

Reference material describing how the API behaves

ContributionGuide

ContributionGuide

JSONSchema

JSONSchema

Documentation

Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

Design & Contract 1

Pagination, idempotency, versioning, errors, and events

JSONLD

JSONLD

Build 2

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

GitHubRepository

GitHubRepository

Access & Security 2

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Security

Security

Learn 1

Tutorials, courses, talks, and written guidance

YouTube

YouTube

Operate 7

Status, limits, changes, and where to get help

Releases

ChangeLog

Community

Slack

Support

ReleaseNotes

StackOverflow

Scroll for all 7

Commercial 3

Pricing, plans, and the legal terms of use

License

License

PrivacyPolicy

PrivacyPolicy

TermsOfService

TermsOfService

Company 3

The organization behind the API

LinkedIn

Website

Website

Blog

Blog

Other 1

Properties that don't map to a standard resource type

CapabilityMap

CapabilityMap

Source (apis.yml)

aid: linkerd
name: Linkerd
description: Service mesh without the mess. Linkerd adds security, observability, and reliability to any Kubernetes cluster
  without the complexity of bloat of other meshes.
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/linkerd.png
tags:
- Kubernetes
- mTLS
- Observability
- Security
- Service Mesh
created: '2025-08-19'
modified: '2026-05-19'
url: https://raw.githubusercontent.com/api-evangelist/linkerd/refs/heads/main/apis.yml
specificationVersion: '0.23'
apis:
- aid: linkerd:proxy-control-plane-api
  name: Linkerd Proxy Control Plane API
  description: The Linkerd Proxy Control Plane gRPC API defines the protobuf service contracts used by the data-plane proxy
    to communicate with the control plane. It includes the Destination API for service discovery and traffic policy, the Identity
    API for issuing mTLS certificates, and the Inbound API for per-port authorization and rate-limiting policies.
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://github.com/linkerd/linkerd2-proxy-api
  tags:
  - Control Plane
  - gRPC
  - mTLS
  - Policy
  properties:
  - type: Documentation
    url: https://github.com/linkerd/linkerd2-proxy-api
  - type: Reference
    url: https://linkerd.io/2-edge/reference/authorization-policy/
  - type: GitHubRepository
    url: https://github.com/linkerd/linkerd2-proxy-api
  - type: JSONSchema
    url: json-schema/service-profile.json
- aid: linkerd:multicluster-api
  name: Linkerd Multicluster API
  description: The Linkerd Multicluster extension provides Kubernetes CRDs and a gateway component that enables transparent,
    secure cross-cluster service communication. It uses mTLS to authenticate workloads across cluster boundaries within a
    unified trust domain, allowing services in different clusters to communicate as if they were local.
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://linkerd.io/2-edge/features/multicluster/
  properties:
  - type: Documentation
    url: https://linkerd.io/2-edge/features/multicluster/
  - type: Reference
    url: https://linkerd.io/2-edge/reference/multicluster/
  tags:
  - Federation
  - Kubernetes
  - mTLS
  - Multi-Cluster
  tags_raw:
  - Federation
  - Kubernetes
  - mTLS
  - Multicluster
- aid: linkerd:linkerd-discovery-api
  name: Linkerd Discovery API
  description: API resource discovery
  humanURL: https://linkerd.io/2-edge/reference/proxy-configuration/
  baseURL: http://localhost:4191
  tags:
  - Discovery
  properties:
  - type: OpenAPI
    url: openapi/linkerd-discovery-api-openapi.yml
  - type: Documentation
    url: https://linkerd.io/2-edge/reference/proxy-configuration/
  - type: Reference
    url: https://linkerd.io/2-edge/reference/proxy-metrics/
  - type: Documentation
    url: https://linkerd.io/2-edge/reference/cli/viz/
  - type: JSONSchema
    url: json-schema/stat-summary.json
  - type: JSONSchema
    url: json-schema/edge.json
  - type: JSONSchema
    url: json-schema/gateway.json
  - type: JSONLD
    url: json-ld/linkerd-context.jsonld
  - type: JSONSchema
    url: json-schema/tap-event.json
- aid: linkerd:linkerd-edges-api
  name: Linkerd Edges API
  description: Connection topology between resources
  humanURL: https://linkerd.io/2-edge/reference/proxy-configuration/
  baseURL: http://localhost:4191
  tags:
  - Edges
  properties:
  - type: OpenAPI
    url: openapi/linkerd-edges-api-openapi.yml
  - type: Documentation
    url: https://linkerd.io/2-edge/reference/proxy-configuration/
  - type: Reference
    url: https://linkerd.io/2-edge/reference/proxy-metrics/
  - type: Documentation
    url: https://linkerd.io/2-edge/reference/cli/viz/
  - type: JSONSchema
    url: json-schema/stat-summary.json
  - type: JSONSchema
    url: json-schema/edge.json
  - type: JSONSchema
    url: json-schema/gateway.json
  - type: JSONLD
    url: json-ld/linkerd-context.jsonld
  - type: JSONSchema
    url: json-schema/tap-event.json
- aid: linkerd:linkerd-gateways-api
  name: Linkerd Gateways API
  description: Multicluster gateway metrics
  humanURL: https://linkerd.io/2-edge/reference/proxy-configuration/
  baseURL: http://localhost:4191
  tags:
  - Gateways
  properties:
  - type: OpenAPI
    url: openapi/linkerd-gateways-api-openapi.yml
  - type: Documentation
    url: https://linkerd.io/2-edge/reference/proxy-configuration/
  - type: Reference
    url: https://linkerd.io/2-edge/reference/proxy-metrics/
  - type: Documentation
    url: https://linkerd.io/2-edge/reference/cli/viz/
  - type: JSONSchema
    url: json-schema/stat-summary.json
  - type: JSONSchema
    url: json-schema/edge.json
  - type: JSONSchema
    url: json-schema/gateway.json
  - type: JSONLD
    url: json-ld/linkerd-context.jsonld
  - type: JSONSchema
    url: json-schema/tap-event.json
- aid: linkerd:linkerd-health-api
  name: Linkerd Health API
  description: Health and readiness check endpoints
  humanURL: https://linkerd.io/2-edge/reference/proxy-configuration/
  baseURL: http://localhost:4191
  tags:
  - Health
  properties:
  - type: OpenAPI
    url: openapi/linkerd-health-api-openapi.yml
  - type: Documentation
    url: https://linkerd.io/2-edge/reference/proxy-configuration/
  - type: Reference
    url: https://linkerd.io/2-edge/reference/proxy-metrics/
  - type: Documentation
    url: https://linkerd.io/2-edge/reference/cli/viz/
  - type: JSONSchema
    url: json-schema/stat-summary.json
  - type: JSONSchema
    url: json-schema/edge.json
  - type: JSONSchema
    url: json-schema/gateway.json
  - type: JSONLD
    url: json-ld/linkerd-context.jsonld
  - type: JSONSchema
    url: json-schema/tap-event.json
- aid: linkerd:linkerd-lifecycle-api
  name: Linkerd Lifecycle API
  description: Proxy lifecycle management endpoints
  humanURL: https://linkerd.io/2-edge/reference/proxy-configuration/
  baseURL: http://localhost:4191
  tags:
  - Lifecycle
  properties:
  - type: OpenAPI
    url: openapi/linkerd-lifecycle-api-openapi.yml
  - type: Documentation
    url: https://linkerd.io/2-edge/reference/proxy-configuration/
  - type: Reference
    url: https://linkerd.io/2-edge/reference/proxy-metrics/
  - type: Documentation
    url: https://linkerd.io/2-edge/reference/cli/viz/
  - type: JSONSchema
    url: json-schema/stat-summary.json
  - type: JSONSchema
    url: json-schema/edge.json
  - type: JSONSchema
    url: json-schema/gateway.json
  - type: JSONLD
    url: json-ld/linkerd-context.jsonld
  - type: JSONSchema
    url: json-schema/tap-event.json
- aid: linkerd:linkerd-metrics-api
  name: Linkerd Metrics API
  description: Prometheus metrics endpoints
  humanURL: https://linkerd.io/2-edge/reference/proxy-configuration/
  baseURL: http://localhost:4191
  tags:
  - Metrics
  properties:
  - type: OpenAPI
    url: openapi/linkerd-metrics-api-openapi.yml
  - type: Documentation
    url: https://linkerd.io/2-edge/reference/proxy-configuration/
  - type: Reference
    url: https://linkerd.io/2-edge/reference/proxy-metrics/
  - type: Documentation
    url: https://linkerd.io/2-edge/reference/cli/viz/
  - type: JSONSchema
    url: json-schema/stat-summary.json
  - type: JSONSchema
    url: json-schema/edge.json
  - type: JSONSchema
    url: json-schema/gateway.json
  - type: JSONLD
    url: json-ld/linkerd-context.jsonld
  - type: JSONSchema
    url: json-schema/tap-event.json
- aid: linkerd:linkerd-routes-api
  name: Linkerd Routes API
  description: Per-route metrics
  humanURL: https://linkerd.io/2-edge/reference/proxy-configuration/
  baseURL: http://localhost:4191
  tags:
  - Routes
  properties:
  - type: OpenAPI
    url: openapi/linkerd-routes-api-openapi.yml
  - type: Documentation
    url: https://linkerd.io/2-edge/reference/proxy-configuration/
  - type: Reference
    url: https://linkerd.io/2-edge/reference/proxy-metrics/
  - type: Documentation
    url: https://linkerd.io/2-edge/reference/cli/viz/
  - type: JSONSchema
    url: json-schema/stat-summary.json
  - type: JSONSchema
    url: json-schema/edge.json
  - type: JSONSchema
    url: json-schema/gateway.json
  - type: JSONLD
    url: json-ld/linkerd-context.jsonld
  - type: JSONSchema
    url: json-schema/tap-event.json
- aid: linkerd:linkerd-statistics-api
  name: Linkerd Statistics API
  description: Resource statistics and golden metrics
  humanURL: https://linkerd.io/2-edge/reference/proxy-configuration/
  baseURL: http://localhost:4191
  tags:
  - Statistics
  properties:
  - type: OpenAPI
    url: openapi/linkerd-statistics-api-openapi.yml
  - type: Documentation
    url: https://linkerd.io/2-edge/reference/proxy-configuration/
  - type: Reference
    url: https://linkerd.io/2-edge/reference/proxy-metrics/
  - type: Documentation
    url: https://linkerd.io/2-edge/reference/cli/viz/
  - type: JSONSchema
    url: json-schema/stat-summary.json
  - type: JSONSchema
    url: json-schema/edge.json
  - type: JSONSchema
    url: json-schema/gateway.json
  - type: JSONLD
    url: json-ld/linkerd-context.jsonld
  - type: JSONSchema
    url: json-schema/tap-event.json
- aid: linkerd:linkerd-tap-api
  name: Linkerd Tap API
  description: Real-time traffic inspection
  humanURL: https://linkerd.io/2-edge/reference/proxy-configuration/
  baseURL: http://localhost:4191
  tags:
  - TAP
  tags_raw:
  - Tap
  properties:
  - type: OpenAPI
    url: openapi/linkerd-tap-api-openapi.yml
  - type: Documentation
    url: https://linkerd.io/2-edge/reference/proxy-configuration/
  - type: Reference
    url: https://linkerd.io/2-edge/reference/proxy-metrics/
  - type: Documentation
    url: https://linkerd.io/2-edge/reference/cli/viz/
  - type: JSONSchema
    url: json-schema/stat-summary.json
  - type: JSONSchema
    url: json-schema/edge.json
  - type: JSONSchema
    url: json-schema/gateway.json
  - type: JSONLD
    url: json-ld/linkerd-context.jsonld
  - type: JSONSchema
    url: json-schema/tap-event.json
common:
- type: CapabilityMap
  url: capabilities/linkerd-capability-edges.yml
  name: Linkerd Business Capability Map
- type: Releases
  url: https://github.com/linkerd/linkerd2-proxy-api/releases
- type: ContributionGuide
  url: https://github.com/linkerd/linkerd2-proxy-api/blob/main/CONTRIBUTING.md
- type: License
  name: Apache-2.0
  url: https://github.com/linkerd/linkerd2-proxy-api/blob/main/LICENSE
- type: AgenticAccess
  url: agentic-access/linkerd-agentic-access.yml
- type: DomainSecurity
  url: security/linkerd-domain-security.yml
- type: LinkedIn
  url: https://www.linkedin.com/company/linkerd
- type: JSONLD
  url: json-ld/linkerd-context.jsonld
- type: JSONSchema
  url: json-schema/service-profile.json
- type: Website
  url: https://linkerd.io/
- type: Documentation
  url: https://linkerd.io/2.19/reference/
- type: GettingStarted
  url: https://linkerd.io/2.19/getting-started/
- type: GitHubOrganization
  url: https://github.com/linkerd
- type: GitHubRepository
  url: https://github.com/linkerd/linkerd2
- type: Blog
  url: https://linkerd.io/blog/
- type: ChangeLog
  url: https://github.com/linkerd/linkerd2/blob/main/CHANGES.md
- type: Community
  url: https://linkerd.io/community/get-involved/
- type: Slack
  url: https://slack.linkerd.io/
- type: Support
  url: https://linkerd.buoyant.io/
- type: ReleaseNotes
  url: https://github.com/linkerd/linkerd2/releases
- type: Security
  url: https://github.com/linkerd/linkerd2/blob/main/SECURITY.md
- type: StackOverflow
  url: https://stackoverflow.com/questions/tagged/linkerd
- type: YouTube
  url: https://www.youtube.com/@Linkerd
- type: PrivacyPolicy
  url: https://buoyant.io/privacy-policy
- type: TermsOfService
  url: https://buoyant.io/terms-of-service
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

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get_provider_operationsEvery operation across all of their OpenAPIs — one call instead of parsing every spec.
get_provider_toolsEvery MCP tool they ship, with the operation each wraps.
get_provider_evidenceHow each part of their score was established. Free — the basis for a claim should not sit behind it.
get_provider_ratingPRO — composite, band, trend and facet scores.
apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
resolveTurn a domain, URL or GitHub org into the provider it belongs to.
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