Pusher website screenshot

Pusher

Pusher is a realtime communication platform owned by MessageBird/Bird. Its primary product Channels provides pub/sub messaging over WebSocket and HTTP; Beams provides device push notifications. Authentication uses an app key + secret per Pusher app. Channels and Beams are still actively sold; the older Chatkit product was sunset.

Pusher publishes 4 APIs on the APIs.io network, including Channels API, Events API, and 2 more. Tagged areas include Realtime, WebSockets, Pub/Sub, Push Notifications, and Messaging.

The Pusher catalog on APIs.io includes 1 event-driven AsyncAPI specification and 1 Spectral governance ruleset.

Pusher’s developer surface includes authentication, developer portal, documentation, pricing, GitHub presence, engineering blog, and 9 more developer resources.

🌐 Visit website 📡 Source on GitHub
50.7/100 developing ▼ -5.8 Agent 36/100 agent ready Full breakdown ↓
scored 2026-07-28 · rubric v0.6
AccessFreemiumSelf serve⚡ Free to try
5 APIs
RealtimeWebSocketsPub/SubPush NotificationsMessaging

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-07-28 · rubric v0.6
Composite quality — 50.7/100 · developing
Contract Quality 17.2 / 25
Developer Ergonomics 6.1 / 20
Commercial Clarity 11.6 / 20
Operational Transparency 6.8 / 13
Governance 5.0 / 12
Discoverability 7.4 / 10
Agent readiness — 36/100 · agent ready
Machine-Readable Contract 18 / 18
Agentic Access Contract 10 / 10
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 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/pusher: 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 5

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

Pusher Channels API

Pub/sub channels over WebSocket (client) and HTTP (server publish). Public, private, and presence channels supported. WebSocket endpoint at ws-{cluster}.pusher.com. Cluster host...

Pusher Beams API

Server API for sending iOS, Android, and Web push notifications via FCM, APNs, and Web Push.

Pusher Channels API

The Channels API from Pusher — 3 operation(s) for channels.

Pusher Events API

The Events API from Pusher — 2 operation(s) for events.

Pusher Users API

The Users API from Pusher — 1 operation(s) for users.

Open Collections 1

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

Pusher Channels HTTP API

OPEN COLLECTION

GraphQL 1

GraphQL schemas published by this provider.

Pusher GraphQL Schema

This conceptual GraphQL schema models the Pusher platform — covering both **Pusher Channels** (real-time pub/sub messaging over WebSocket and HTTP) and **Pusher Beams** (cross-p...

GRAPHQL

Pricing Plans 1

Published pricing tiers and plan structures.

Pusher Plans Pricing

9 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Pusher Rate Limits

9 limits

RATE LIMITS

FinOps 1

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

Pusher Finops

FINOPS

Event Specifications 1

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

Pusher Channels WebSocket Protocol

AsyncAPI definition of the Pusher Channels public WebSocket wire protocol (protocol version 7). Pusher Channels is a pub/sub realtime messaging service. Clients connect over Web...

ASYNCAPI

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Pusher API Rules

7 rules · 1 errors 6 warnings

SPECTRAL

Security Posture 4

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

Pusher Authentication

apiKey · 1 scheme

SECURITY

Pusher Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Pusher Vulnerability Disclosure

Hackerone · security.txt · contact published

SECURITY

Pusher Trust Center

ISO 27001, HIPAA, GDPR

SECURITY

Agentic Access 1

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

Pusher Agentic Access

6 operations · 3 acting · 1 human-in-the-loop

6 operations · 3 acting

AGENTIC

Resources

Get Started 1

Portal, sign-up, and the first successful call

Portal
Portal

Documentation 1

Reference material describing how the API behaves

Documentation
Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess
AgenticAccess

Build 1

SDKs, sample code, and the tooling you integrate with

GitHub
GitHub

Access & Security 4

Authentication, authorization, and security posture

TrustCenter
TrustCenter
 VulnerabilityDisclosure
VulnerabilityDisclosure
 DomainSecurity
DomainSecurity
 Authentication
Authentication

Operate 2

Status, limits, changes, and where to get help

StatusPage
StatusPage
 RateLimits
RateLimits

Commercial 3

Pricing, plans, and the legal terms of use

Pricing
Pricing
 Plans
Plans
 FinOps
FinOps

Company 2

The organization behind the API

LinkedIn
LinkedIn
 Blog
Blog

Source (apis.yml)

apis.yml Raw ↑ 
aid: pusher
url: https://raw.githubusercontent.com/api-evangelist/pusher/refs/heads/main/apis.yml
name: Pusher
kind: company
accessModel:
  pricing: freemium
  onboarding: self-serve
  trial: false
  try_now: true
  public: false
  label: Freemium · Self-serve signup
  confidence: high
  source:
  - plans
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/pusher.png
tags:
- Realtime
- WebSockets
- Pub/Sub
- Push Notifications
- Messaging
created: '2026-05-08'
modified: '2026-05-29'
specificationVersion: '0.19'
description: Pusher is a realtime communication platform owned by MessageBird/Bird. Its primary product Channels provides
  pub/sub messaging over WebSocket and HTTP; Beams provides device push notifications. Authentication uses an app key + secret
  per Pusher app. Channels and Beams are still actively sold; the older Chatkit product was sunset.
apis:
- aid: pusher:channels-api
  name: Pusher Channels API
  tags:
  - Pub/Sub
  - WebSockets
  - HTTP
  - Messaging
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  baseURL: https://api-{cluster}.pusher.com/apps/{app_id}
  humanURL: https://pusher.com/docs/channels
  description: Pub/sub channels over WebSocket (client) and HTTP (server publish). Public, private, and presence channels
    supported. WebSocket endpoint at ws-{cluster}.pusher.com. Cluster hostnames include eu, us2, us3, ap1, ap2, ap3, etc.
  properties:
  - type: Documentation
    url: https://pusher.com/docs/channels
  - type: Pricing
    url: https://pusher.com/channels/pricing
  - type: AsyncAPI
    url: asyncapi/pusher-asyncapi.yml
  - url: graphql/pusher-graphql.md
    type: GraphQL
  x-features:
  - Public, private, presence channels
  - End-to-end encryption (E2E)
  - Webhooks for events
  - Multi-region clusters
  x-use-cases:
  - In-app chat
  - Live dashboards
  - Realtime collaboration
- aid: pusher:beams-api
  name: Pusher Beams API
  tags:
  - Push Notifications
  - Mobile
  - Web Push
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  baseURL: https://{instance_id}.pushnotifications.pusher.com
  humanURL: https://pusher.com/docs/beams
  description: Server API for sending iOS, Android, and Web push notifications via FCM, APNs, and Web Push.
  properties:
  - type: Documentation
    url: https://pusher.com/docs/beams
  - type: Pricing
    url: https://pusher.com/beams/pricing
  x-features:
  - Multi-platform push (iOS, Android, Web)
  - Authenticated user-targeted publishes
  - Device interest subscriptions
  x-use-cases:
  - Push to mobile apps
  - Web push notifications
- aid: pusher:pusher-channels-api
  name: Pusher Channels API
  description: The Channels API from Pusher — 3 operation(s) for channels.
  humanURL: https://pusher.com/docs/channels
  baseURL: https://api-{cluster}.pusher.com/apps/{app_id}
  tags:
  - Channels
  properties:
  - type: OpenAPI
    url: openapi/pusher-channels-api-openapi.yml
- aid: pusher:pusher-events-api
  name: Pusher Events API
  description: The Events API from Pusher — 2 operation(s) for events.
  humanURL: https://pusher.com/docs/channels
  baseURL: https://api-{cluster}.pusher.com/apps/{app_id}
  tags:
  - Events
  properties:
  - type: OpenAPI
    url: openapi/pusher-events-api-openapi.yml
- aid: pusher:pusher-users-api
  name: Pusher Users API
  description: The Users API from Pusher — 1 operation(s) for users.
  humanURL: https://pusher.com/docs/channels
  baseURL: https://api-{cluster}.pusher.com/apps/{app_id}
  tags:
  - Users
  properties:
  - type: OpenAPI
    url: openapi/pusher-users-api-openapi.yml
common:
- type: AgenticAccess
  url: agentic-access/pusher-agentic-access.yml
- type: TrustCenter
  url: security/pusher-trust-center.yml
- type: VulnerabilityDisclosure
  url: security/pusher-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/pusher-domain-security.yml
- type: Authentication
  url: authentication/pusher-authentication.yml
- type: LinkedIn
  url: https://www.linkedin.com/company/pusher-app
- type: Portal
  url: https://pusher.com/
- type: Documentation
  url: https://pusher.com/docs
- type: Pricing
  url: https://pusher.com/channels/pricing
- type: GitHub
  url: https://github.com/pusher
- type: StatusPage
  url: https://status.pusher.com/
- type: Plans
  url: plans/pusher-plans-pricing.yml
- type: RateLimits
  url: rate-limits/pusher-rate-limits.yml
- type: FinOps
  url: finops/pusher-finops.yml
- type: Blog
  url: https://pusher.com/blog
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com