HAProxy

HAProxy is a free, very fast and reliable reverse-proxy offering high availability, load balancing, and proxying for TCP and HTTP-based applications. It exposes a Data Plane API for dynamic configuration management and a stats socket for runtime management.

HAProxy publishes 1 API on the APIs.io network: Data Plane API. Tagged areas include High Availability, Load Balancing, Networking, Reverse Proxy, and Proxy.

HAProxy’s developer surface includes authentication, documentation, engineering blog, support, CLI, changelog, and 26 more developer resources.

🌐 Visit website 📡 Source on GitHub

43.9/100 developing ▬ flat Agent 28/100 agent aware open core · Apache-2.0 Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

AccessFreemium

3 APIs

High Availability Load Balancing Networking Reverse Proxy Proxy Kubernetes Ingress Open-Source Infrastructure Application Delivery

Kin Score

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

Composite quality — 43.9/100 · developing

Contract Quality 10.2 / 20

Developer Ergonomics 10.2 / 16

Access Clarity 5.7 / 16

Operational Transparency 2.7 / 10

Contract Governance 0.4 / 10

Discoverability 5.9 / 8

Open Source Surface 5.0 / 10

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 28/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 9 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 7 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 0 / 6

Agent Skills 5 / 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/haproxy: 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 3

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

HAProxy Data Plane API

The HAProxy Data Plane API is a REST API for managing HAProxy configuration dynamically. It allows runtime configuration of frontends, backends, servers, ACLs, and other HAProxy...

HAProxy Runtime API

The HAProxy Runtime API (formerly known as the stats socket) is a socket-based interface for dynamically managing HAProxy at runtime. It allows operators to enable or disable se...

HAProxy Kubernetes Ingress Controller

The HAProxy Kubernetes Ingress Controller implements routing rules defined in Kubernetes Ingress resources, dynamically updating HAProxy configuration as pods are added or remov...

Pricing Plans 1

Published pricing tiers and plan structures.

Haproxy Plans Pricing

0 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Haproxy Rate Limits

0 limits

RATE LIMITS

FinOps 1

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

Haproxy Finops

FINOPS

Security Posture 2

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

Haproxy Authentication

http · 1 scheme

SECURITY

Haproxy Domain Security

TLSv1.3 · DMARC

SECURITY

Resources

Get Started 1

Portal, sign-up, and the first successful call

Login

Documentation 2

Reference material describing how the API behaves

ContributionGuide

ContributionGuide

Documentation

Documentation

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

AgentSkill

AgentSkill

LLMsTxt

LLMsTxt

Design & Contract 6

Pagination, idempotency, versioning, errors, and events

Conventions

Idempotency

Lifecycle

Conformance

ErrorCatalog

DataModel

Build 5

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

GitHubOrganization

Packages

SDKs

CLI

Access & Security 2

Authentication, authorization, and security posture

Authentication

Authentication

DomainSecurity

DomainSecurity

Operate 6

Status, limits, changes, and where to get help

IssueTracker

Community

Support

Deprecation

ChangeLog

RateLimits

Commercial 5

Pricing, plans, and the legal terms of use

License

TermsOfService

Plans

FinOps

PrivacyPolicy

Company 3

The organization behind the API

LinkedIn

Website

Website

Blog

Blog

Source (apis.yml)

aid: haproxy
name: HAProxy
description: HAProxy is a free, very fast and reliable reverse-proxy offering high availability, load balancing, and proxying
  for TCP and HTTP-based applications. It exposes a Data Plane API for dynamic configuration management and a stats socket
  for runtime management.
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
  - 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
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/haproxy.png
tags:
- High Availability
- Load Balancing
- Networking
- Reverse Proxy
- Proxy
- Kubernetes
- Ingress
- Open-Source
- Infrastructure
- Application Delivery
tags_raw:
- High Availability
- Load Balancing
- Networking
- Reverse Proxy
- Proxy
- Kubernetes
- Ingress
- Open Source
- Infrastructure
- Application Delivery
url: https://raw.githubusercontent.com/api-evangelist/haproxy/refs/heads/main/apis.yml
created: '2026-03-16'
modified: '2026-08-28'
specificationVersion: '0.23'
apis:
- aid: haproxy:haproxy-data-plane-api
  name: HAProxy Data Plane API
  description: The HAProxy Data Plane API is a REST API for managing HAProxy configuration dynamically. It allows runtime
    configuration of frontends, backends, servers, ACLs, and other HAProxy objects without requiring configuration file changes
    or restarts.
  humanURL: https://www.haproxy.com/documentation/dataplaneapi/latest/
  baseURL: http://{haproxy-host}:5555/v3
  tags:
  - Configuration
  - Load Balancing
  - REST API
  properties:
  - type: Documentation
    url: https://www.haproxy.com/documentation/haproxy-data-plane-api/
  - type: OpenAPI
    url: openapi/haproxy-data-plane-api-openapi.yml
  - type: OpenAPI
    name: Upstream source (haproxytech/client-native)
    url: https://raw.githubusercontent.com/haproxytech/client-native/master/specification/build/haproxy_spec.yaml
  - type: APIReference
    url: https://www.haproxy.com/documentation/haproxy-data-plane-api/reference/
  - type: GettingStarted
    url: https://www.haproxy.com/documentation/haproxy-data-plane-api/installation/
  - type: Overlay
    url: overlays/haproxy-data-plane-api-overlay.yaml
  - type: DataModel
    url: data-model/haproxy-data-model.yml
  - type: ErrorCatalog
    url: errors/haproxy-problem-types.yml
  - type: GitHubRepository
    url: https://github.com/haproxytech/dataplaneapi
  - type: ChangeLog
    url: https://github.com/haproxytech/dataplaneapi/releases
- aid: haproxy:haproxy-runtime-api
  name: HAProxy Runtime API
  description: The HAProxy Runtime API (formerly known as the stats socket) is a socket-based interface for dynamically managing
    HAProxy at runtime. It allows operators to enable or disable servers, adjust weights, inspect stick tables, view statistics,
    and perform other live configuration changes without reloading the process. Its native transport is a UNIX socket or a
    TCP/IP socket, not HTTP; the baseURL recorded here is the HTTP passthrough the Data Plane API exposes for 26 of these
    operations under /v3/services/haproxy/runtime.
  humanURL: https://www.haproxy.com/documentation/haproxy-runtime-api/
  baseURL: http://{haproxy-host}:5555/v3/services/haproxy/runtime
  tags:
  - Load Balancing
  - Runtime Management
  - Statistics
  properties:
  - type: Documentation
    url: https://www.haproxy.com/documentation/haproxy-runtime-api/
  - type: Reference
    url: https://www.haproxy.com/documentation/haproxy-runtime-api/reference/
- aid: haproxy:haproxy-kubernetes-ingress-controller
  name: HAProxy Kubernetes Ingress Controller
  description: 'The HAProxy Kubernetes Ingress Controller implements routing rules defined in Kubernetes Ingress resources,
    dynamically updating HAProxy configuration as pods are added or removed from the cluster. It supports the Gateway API,
    custom resources, and certificate management via the HAProxy Runtime API. It has no standalone HTTP API of its own: its
    interface is the Kubernetes API server, where it registers custom resources under the ingress.v3.haproxy.org (and legacy
    ingress.v1.haproxy.org) API groups.'
  humanURL: https://www.haproxy.com/documentation/kubernetes-ingress/
  baseURL: https://{kubernetes-api-server}/apis/ingress.v3.haproxy.org/v3
  tags:
  - Ingress Controller
  - Kubernetes
  - Load Balancing
  properties:
  - type: Documentation
    url: https://www.haproxy.com/documentation/kubernetes-ingress/
  - type: GettingStarted
    url: https://www.haproxy.com/documentation/kubernetes-ingress/community/installation/
  - type: ChangeLog
    url: https://www.haproxy.com/documentation/kubernetes-ingress/community/release-notes/
  - type: GitHubRepository
    url: https://github.com/haproxytech/kubernetes-ingress
common:
- type: Authentication
  url: authentication/haproxy-authentication.yml
- type: IssueTracker
  url: https://github.com/haproxytech/dataplaneapi/issues
- type: ContributionGuide
  url: https://github.com/haproxytech/dataplaneapi/blob/master/CONTRIBUTING.md
- type: License
  name: Apache-2.0
  url: https://github.com/haproxytech/dataplaneapi/blob/master/LICENSE
- type: DomainSecurity
  url: security/haproxy-domain-security.yml
- type: LinkedIn
  url: https://www.linkedin.com/company/haproxy-technologies
- type: Website
  url: https://www.haproxy.org/
- type: Documentation
  url: https://docs.haproxy.org/
- type: GitHubOrganization
  url: https://github.com/haproxy
- type: GitHubOrganization
  url: https://github.com/haproxytech
- type: Community
  url: https://discourse.haproxy.org/
- type: Blog
  url: https://www.haproxy.com/blog/
- type: Support
  url: https://www.haproxy.com/support/support-options
- type: TermsOfService
  url: https://www.haproxy.com/legal
- type: Conventions
  url: conventions/haproxy-conventions.yml
- type: Idempotency
  url: conventions/haproxy-conventions.yml
- type: Packages
  url: packages/haproxy-packages.yml
- type: SDKs
  url: packages/haproxy-packages.yml
- type: CLI
  url: cli/haproxy-cli.yml
- type: Lifecycle
  url: lifecycle/haproxy-lifecycle.yml
- type: Deprecation
  url: lifecycle/haproxy-lifecycle.yml
- type: ChangeLog
  url: changelog/haproxy-changelog.yml
- type: Conformance
  url: conformance/haproxy-conformance.yml
- type: ErrorCatalog
  url: errors/haproxy-problem-types.yml
- type: DataModel
  url: data-model/haproxy-data-model.yml
- type: AgentSkill
  url: skills/_index.yml
- type: LLMsTxt
  url: llms/haproxy-llms.txt
- type: Plans
  url: plans/haproxy-plans-pricing.yml
- type: RateLimits
  url: rate-limits/haproxy-rate-limits.yml
- type: FinOps
  url: finops/haproxy-finops.yml
- type: PrivacyPolicy
  url: https://www.haproxy.com/privacy-policy
- type: Login
  url: https://my.haproxy.com/portal/cust/login
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
x-enrichment:
  date: '2026-08-28'
  status: enriched
  artifacts_added: 19
  pass: local-v1

Work with this as data

Every provider here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for providers

9 MCP tools reach this

find_providersBrowse and filter every provider in the catalog.
get_provider_artifactsEvery artifact this provider publishes, grouped by type.
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.
find_cohortsEvery scored population of providers in the catalog.

All 92 tools →

Call it yourself

curl for this page

This provider

curl "https://apis.io/api/v1/providers/haproxy"

All providers

curl "https://apis.io/api/v1/providers?limit=25"

Every operation they expose

curl "https://apis.io/api/v1/providers/haproxy/operations?limit=25"

How their score was established

curl "https://apis.io/api/v1/providers/haproxy/evidence"

Discovery needs no key. Ratings and market analysis are Pro.

Get an API key

Free tier, no form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.

GitHub Google LinkedIn

A second provider on the same verified email joins the account you already have.