Google Cloud Pub/Sub website screenshot

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. It provides reliable, many-to-many, asynchronous messaging that decouples senders and receivers.

Google Cloud Pub/Sub publishes 3 APIs on the APIs.io network: Schemas API, Subscriptions API, and Topics API. Tagged areas include Event-Driven, Google Cloud, Messaging, and Pub/Sub.

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

Google Cloud Pub/Sub’s developer surface includes authentication, getting-started guide, pricing, and 6 more developer resources.

🌐 Visit website 📡 Source on GitHub
52.1/100 developing ▬ flat Agent 36/100 agent ready Full breakdown ↓
scored 2026-07-28 · rubric v0.6
AccessFreemiumSelf serve⚡ Free to try
3 APIs
Event-DrivenGoogle CloudMessagingPub/Sub

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-07-28 · rubric v0.6
Composite quality — 52.1/100 · developing
Contract Quality 20.1 / 25
Developer Ergonomics 4.3 / 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-cloud-pubsub: 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 3

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

Google Cloud Pub/Sub Schemas API

Operations for managing Pub/Sub schemas

Google Cloud Pub/Sub Subscriptions API

Operations for managing Pub/Sub subscriptions

Google Cloud Pub/Sub Topics API

Operations for managing Pub/Sub topics

Open Collections 1

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

Google Cloud Pub/Sub API

OPEN COLLECTION

Pricing Plans 1

Published pricing tiers and plan structures.

Google Cloud Pubsub Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Google Cloud Pubsub Rate Limits

5 limits

RATE LIMITS

FinOps 1

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

Google Cloud Pubsub Finops

FINOPS

Event Specifications 1

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

Google Cloud Pub/Sub Messaging Surface

Google Cloud Pub/Sub is a fully managed, real-time messaging service for sending and receiving messages between independent applications. This AsyncAPI document describes Pub/Su...

ASYNCAPI

Semantic Vocabularies 1

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

Google Cloud Pubsub Context

15 classes · 1 properties

JSON-LD

Spectral Rules 2

Spectral governance rulesets for linting and validating these APIs.

Google Cloud Pub/Sub API Rules

8 rules · 1 errors 6 warnings 1 info

SPECTRAL

Google Cloud Pub/Sub API Rules

5 rules · 3 warnings 2 info

SPECTRAL

JSON Schema 1

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

Google Cloud Pub/Sub Topic

7 properties

JSON SCHEMA

Security Posture 3

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

Google Cloud Pubsub Authentication

oauth2 · 1 scheme

SECURITY

Google Cloud Pubsub Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Google Cloud Pubsub Vulnerability Disclosure

security.txt · contact published

SECURITY

Scopes 1

OAuth scopes governing access to this provider's APIs.

Google Cloud Pubsub Scopes

2 scopes · authorizationCode

2 scopes

SCOPES

Agentic Access 1

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

Google Cloud Pubsub Agentic Access

13 operations · 8 acting

13 operations · 8 acting

AGENTIC

Resources

Get Started 1

Portal, sign-up, and the first successful call

GettingStarted
GettingStarted

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 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization
GitHubOrganization

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

Source (apis.yml)

apis.yml Raw ↑ 
name: Google Cloud 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. It provides reliable, many-to-many, asynchronous messaging that decouples senders and
  receivers.
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-cloud-pubsub.png
url: https://raw.githubusercontent.com/api-evangelist/google-cloud-pubsub/refs/heads/main/apis.yml
created: '2026-03-13'
modified: '2026-05-30'
specificationVersion: '0.18'
tags:
- Event-Driven
- Google Cloud
- Messaging
- Pub/Sub
apis:
- aid: google-cloud-pubsub:google-cloud-pubsub-schemas-api
  name: Google Cloud Pub/Sub Schemas API
  description: Operations for managing Pub/Sub schemas
  humanURL: https://cloud.google.com/pubsub/docs
  baseURL: https://pubsub.googleapis.com
  tags:
  - Schemas
  properties:
  - type: OpenAPI
    url: openapi/google-cloud-pubsub-schemas-api-openapi.yml
  - type: Documentation
    url: https://cloud.google.com/pubsub/docs/reference/rest
  - type: AsyncAPI
    url: asyncapi/google-cloud-pubsub-asyncapi.yml
  - type: JSONSchema
    url: json-schema/google-cloud-pubsub-topic-schema.json
- aid: google-cloud-pubsub:google-cloud-pubsub-subscriptions-api
  name: Google Cloud Pub/Sub Subscriptions API
  description: Operations for managing Pub/Sub subscriptions
  humanURL: https://cloud.google.com/pubsub/docs
  baseURL: https://pubsub.googleapis.com
  tags:
  - Subscriptions
  properties:
  - type: OpenAPI
    url: openapi/google-cloud-pubsub-subscriptions-api-openapi.yml
  - type: Documentation
    url: https://cloud.google.com/pubsub/docs/reference/rest
  - type: AsyncAPI
    url: asyncapi/google-cloud-pubsub-asyncapi.yml
  - type: JSONSchema
    url: json-schema/google-cloud-pubsub-topic-schema.json
- aid: google-cloud-pubsub:google-cloud-pubsub-topics-api
  name: Google Cloud Pub/Sub Topics API
  description: Operations for managing Pub/Sub topics
  humanURL: https://cloud.google.com/pubsub/docs
  baseURL: https://pubsub.googleapis.com
  tags:
  - Topics
  properties:
  - type: OpenAPI
    url: openapi/google-cloud-pubsub-topics-api-openapi.yml
  - type: Documentation
    url: https://cloud.google.com/pubsub/docs/reference/rest
  - type: AsyncAPI
    url: asyncapi/google-cloud-pubsub-asyncapi.yml
  - type: JSONSchema
    url: json-schema/google-cloud-pubsub-topic-schema.json
common:
- type: AgenticAccess
  url: agentic-access/google-cloud-pubsub-agentic-access.yml
- type: VulnerabilityDisclosure
  url: security/google-cloud-pubsub-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/google-cloud-pubsub-domain-security.yml
- type: Authentication
  url: authentication/google-cloud-pubsub-authentication.yml
- type: OAuthScopes
  url: scopes/google-cloud-pubsub-scopes.yml
- type: GitHubOrganization
  url: https://github.com/GoogleCloudPlatform
- type: GettingStarted
  url: https://cloud.google.com/pubsub/docs/quickstarts
- type: Pricing
  url: https://cloud.google.com/pubsub/pricing
- type: JSONLD
  url: json-ld/google-cloud-pubsub-context.jsonld
- type: Integrations
  url: https://cloud.google.com/marketplace
integrations:
- name: Become a Partner
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com