Google Pub/Sub website screenshot

Google Pub/Sub

Google Cloud Pub/Sub is a fully managed, real-time messaging service that allows you to send and receive messages between independent applications, providing reliable, many-to-many, asynchronous messaging for event ingestion, streaming analytics, and event-driven computing.

Google Pub/Sub publishes 6 APIs on the APIs.io network, including Publish API, Schemas API, Snapshots API, and 3 more. Tagged areas include Cloud, Event-Driven, Google Cloud, Messaging, and Pub/Sub.

The Google Pub/Sub catalog on APIs.io includes 1 event-driven AsyncAPI specification and 2 Spectral governance rulesets.

Google Pub/Sub’s developer surface includes authentication, documentation, getting-started guide, pricing, GitHub presence, engineering blog, and 5 more developer resources.

🌐 Visit website 📡 Source on GitHub
52.2/100 developing ▬ flat Agent 36/100 agent ready Full breakdown ↓
scored 2026-07-28 · rubric v0.6
AccessFreemiumSelf serve⚡ Free to try
6 APIs
CloudEvent-DrivenGoogle CloudMessagingPub/SubStreaming

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-07-28 · rubric v0.6
Composite quality — 52.2/100 · developing
Contract Quality 19.3 / 25
Developer Ergonomics 6.5 / 20
Commercial Clarity 10.0 / 20
Operational Transparency 4.8 / 13
Governance 5.7 / 12
Discoverability 6.5 / 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/google-pub-sub: 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 6

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

Google Pub/Sub Publish API

Publish messages to topics

Google Pub/Sub Schemas API

Manage Pub/Sub schemas

Google Pub/Sub Snapshots API

Manage subscription snapshots

Google Pub/Sub Subscribe API

Pull and acknowledge messages

Google Pub/Sub Subscriptions API

Manage Pub/Sub subscriptions

Google Pub/Sub Topics API

Manage Pub/Sub topics

Open Collections 1

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

Google Pub/Sub Google Cloud Pub/Sub API

OPEN COLLECTION

Pricing Plans 1

Published pricing tiers and plan structures.

Google Pub Sub Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Google Pub Sub Rate Limits

5 limits

RATE LIMITS

FinOps 1

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

Google Pub Sub Finops

FINOPS

Event Specifications 1

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

Google Cloud Pub/Sub

Google Cloud Pub/Sub is a fully managed real-time messaging service that allows you to send and receive messages between independent applications. This AsyncAPI spec describes t...

ASYNCAPI

Spectral Rules 2

Spectral governance rulesets for linting and validating these APIs.

Google Pub/Sub API Rules

7 rules · 1 errors 5 warnings 1 info

SPECTRAL

Google Pub/Sub API Rules

5 rules · 3 warnings 2 info

SPECTRAL

Security Posture 3

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

Google Pub Sub Authentication

http/oauth2 · 2 schemes

SECURITY

Google Pub Sub Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Google Pub Sub Vulnerability Disclosure

security.txt · contact published

SECURITY

Scopes 1

OAuth scopes governing access to this provider's APIs.

Google Pub Sub Scopes

2 scopes · authorizationCode

2 scopes

SCOPES

Agentic Access 1

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

Google Pub Sub Agentic Access

19 operations · 12 acting

19 operations · 12 acting

AGENTIC

Resources

Get Started 1

Portal, sign-up, and the first successful call

GettingStarted
GettingStarted

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

VulnerabilityDisclosure
VulnerabilityDisclosure
 DomainSecurity
DomainSecurity
 Authentication
Authentication
 OAuthScopes
OAuthScopes

Commercial 1

Pricing, plans, and the legal terms of use

Pricing
Pricing

Company 2

The organization behind the API

Website
Website
 Blog
Blog

Source (apis.yml)

apis.yml Raw ↑ 
aid: google-pub-sub
name: Google Pub/Sub
description: Google Cloud Pub/Sub is a fully managed, real-time messaging service that allows you to send and receive messages
  between independent applications, providing reliable, many-to-many, asynchronous messaging for event ingestion, streaming
  analytics, and event-driven computing.
type: Index
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/google-pub-sub.png
tags:
- Cloud
- Event-Driven
- Google Cloud
- Messaging
- Pub/Sub
- Streaming
url: https://raw.githubusercontent.com/api-evangelist/google-pub-sub/refs/heads/main/apis.yml
created: '2026-03-26'
modified: '2026-05-19'
specificationVersion: '0.19'
apis:
- aid: google-pub-sub:google-pub-sub-publish-api
  name: Google Pub/Sub Publish API
  description: Publish messages to topics
  humanURL: https://cloud.google.com/pubsub
  tags:
  - Publish
  properties:
  - type: OpenAPI
    url: openapi/google-pub-sub-publish-api-openapi.yml
  - type: AsyncAPI
    url: https://raw.githubusercontent.com/api-evangelist/google-pub-sub/refs/heads/main/asyncapi/google-pub-sub-asyncapi.yml
  - type: JSONSchema
    url: https://raw.githubusercontent.com/api-evangelist/google-pub-sub/refs/heads/main/json-schema/google-pub-sub-topic.yml
  - type: JSONSchema
    url: https://raw.githubusercontent.com/api-evangelist/google-pub-sub/refs/heads/main/json-schema/google-pub-sub-message.yml
- aid: google-pub-sub:google-pub-sub-schemas-api
  name: Google Pub/Sub Schemas API
  description: Manage Pub/Sub schemas
  humanURL: https://cloud.google.com/pubsub
  tags:
  - Schemas
  properties:
  - type: OpenAPI
    url: openapi/google-pub-sub-schemas-api-openapi.yml
  - type: AsyncAPI
    url: https://raw.githubusercontent.com/api-evangelist/google-pub-sub/refs/heads/main/asyncapi/google-pub-sub-asyncapi.yml
  - type: JSONSchema
    url: https://raw.githubusercontent.com/api-evangelist/google-pub-sub/refs/heads/main/json-schema/google-pub-sub-topic.yml
  - type: JSONSchema
    url: https://raw.githubusercontent.com/api-evangelist/google-pub-sub/refs/heads/main/json-schema/google-pub-sub-message.yml
- aid: google-pub-sub:google-pub-sub-snapshots-api
  name: Google Pub/Sub Snapshots API
  description: Manage subscription snapshots
  humanURL: https://cloud.google.com/pubsub
  tags:
  - Snapshots
  properties:
  - type: OpenAPI
    url: openapi/google-pub-sub-snapshots-api-openapi.yml
  - type: AsyncAPI
    url: https://raw.githubusercontent.com/api-evangelist/google-pub-sub/refs/heads/main/asyncapi/google-pub-sub-asyncapi.yml
  - type: JSONSchema
    url: https://raw.githubusercontent.com/api-evangelist/google-pub-sub/refs/heads/main/json-schema/google-pub-sub-topic.yml
  - type: JSONSchema
    url: https://raw.githubusercontent.com/api-evangelist/google-pub-sub/refs/heads/main/json-schema/google-pub-sub-message.yml
- aid: google-pub-sub:google-pub-sub-subscribe-api
  name: Google Pub/Sub Subscribe API
  description: Pull and acknowledge messages
  humanURL: https://cloud.google.com/pubsub
  tags:
  - Subscribe
  properties:
  - type: OpenAPI
    url: openapi/google-pub-sub-subscribe-api-openapi.yml
  - type: AsyncAPI
    url: https://raw.githubusercontent.com/api-evangelist/google-pub-sub/refs/heads/main/asyncapi/google-pub-sub-asyncapi.yml
  - type: JSONSchema
    url: https://raw.githubusercontent.com/api-evangelist/google-pub-sub/refs/heads/main/json-schema/google-pub-sub-topic.yml
  - type: JSONSchema
    url: https://raw.githubusercontent.com/api-evangelist/google-pub-sub/refs/heads/main/json-schema/google-pub-sub-message.yml
- aid: google-pub-sub:google-pub-sub-subscriptions-api
  name: Google Pub/Sub Subscriptions API
  description: Manage Pub/Sub subscriptions
  humanURL: https://cloud.google.com/pubsub
  tags:
  - Subscriptions
  properties:
  - type: OpenAPI
    url: openapi/google-pub-sub-subscriptions-api-openapi.yml
  - type: AsyncAPI
    url: https://raw.githubusercontent.com/api-evangelist/google-pub-sub/refs/heads/main/asyncapi/google-pub-sub-asyncapi.yml
  - type: JSONSchema
    url: https://raw.githubusercontent.com/api-evangelist/google-pub-sub/refs/heads/main/json-schema/google-pub-sub-topic.yml
  - type: JSONSchema
    url: https://raw.githubusercontent.com/api-evangelist/google-pub-sub/refs/heads/main/json-schema/google-pub-sub-message.yml
- aid: google-pub-sub:google-pub-sub-topics-api
  name: Google Pub/Sub Topics API
  description: Manage Pub/Sub topics
  humanURL: https://cloud.google.com/pubsub
  tags:
  - Topics
  properties:
  - type: OpenAPI
    url: openapi/google-pub-sub-topics-api-openapi.yml
  - type: AsyncAPI
    url: https://raw.githubusercontent.com/api-evangelist/google-pub-sub/refs/heads/main/asyncapi/google-pub-sub-asyncapi.yml
  - type: JSONSchema
    url: https://raw.githubusercontent.com/api-evangelist/google-pub-sub/refs/heads/main/json-schema/google-pub-sub-topic.yml
  - type: JSONSchema
    url: https://raw.githubusercontent.com/api-evangelist/google-pub-sub/refs/heads/main/json-schema/google-pub-sub-message.yml
common:
- type: AgenticAccess
  url: agentic-access/google-pub-sub-agentic-access.yml
- type: VulnerabilityDisclosure
  url: security/google-pub-sub-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/google-pub-sub-domain-security.yml
- type: Authentication
  url: authentication/google-pub-sub-authentication.yml
- type: OAuthScopes
  url: scopes/google-pub-sub-scopes.yml
- type: Website
  url: https://cloud.google.com/pubsub
- type: Documentation
  url: https://cloud.google.com/pubsub/docs
- type: GettingStarted
  url: https://cloud.google.com/pubsub/docs/quickstarts
- type: Pricing
  url: https://cloud.google.com/pubsub/pricing
- type: GitHub
  url: https://github.com/googleapis/google-cloud-go
- type: Blog
  url: https://cloud.google.com/blog
- type: Integrations
  url: https://cloud.google.com/marketplace
integrations:
- name: Become a Partner
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com