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 Real-Time, 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 10 more developer resources.

🌐 Visit website 📡 Source on GitHub

40.1/100 developing ▬ flat Agent 21/100 agent aware saas Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

AccessFreemiumSelf serve⚡ Free to try

1 APIs

Real-Time WebSockets Pub-Sub Push Notifications Messaging

Kin Score

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

Composite quality — 40.1/100 · developing

Contract Quality 13.8 / 23

Developer Ergonomics 6.0 / 18

Access Clarity 6.2 / 18

Operational Transparency 3.4 / 12

Contract Governance 1.2 / 11

Discoverability 6.2 / 9

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 21/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 6

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

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

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.

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/pusher: 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 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 5

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

API Collection

OPEN COLLECTION

Pusher HTTP Channels API

OPEN COLLECTION

Pusher HTTP Channels Events API

OPEN COLLECTION

Pusher HTTP Channels Users API

OPEN COLLECTION

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 3

The organization behind the API

Website

Website

LinkedIn

Blog

Blog

Source (apis.yml)

aid: pusher
url: https://raw.githubusercontent.com/api-evangelist/pusher/refs/heads/main/apis.yml
name: Pusher
kind: company
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: true
  label: Hosted service · you call their endpoint
  confidence: high
  source:
  - openapi
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: freemium
  onboarding: self-serve
  trial: false
  try_now: true
  public: false
  label: Freemium · Self-serve signup
  confidence: medium
  source:
  - plans
  - authentication
  - security
  generated: '2026-09-03'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/pusher.png
tags:
- Real-Time
- WebSockets
- Pub-Sub
- Push Notifications
- Messaging
tags_raw:
- Realtime
- WebSockets
- Pub/Sub
- Push Notifications
- Messaging
created: '2026-05-08'
modified: '2026-05-29'
specificationVersion: '0.23'
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
  tags_raw:
  - 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:
  - Event
  tags_raw:
  - 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:
  - User
  tags_raw:
  - Users
  properties:
  - type: OpenAPI
    url: openapi/pusher-users-api-openapi.yml
common:
- type: Website
  url: https://www.pusher.com/
- 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

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