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
38.1/100 thin ▬ flat Agent 26/100 agent aware saas Full breakdown ↓
scored 2026-09-25 · rubric v0.23.0
AccessFreemiumSelf serve⚡ Free to try
1 APIs
CloudEvent-DrivenGoogle CloudMessagingPub-SubStreaming

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-09-25 · rubric v0.23.0
Composite quality — 38.1/100 · thin
Contract Quality 11.7 / 19
Developer Ergonomics 5.4 / 15
Access Clarity 3.9 / 15
Operational Transparency 1.3 / 10
Contract Governance 1.2 / 9
Discoverability 4.3 / 8
Regulatory Posture 4.1 / 15
Create-or-Update Ergonomics 0.0 / 10
Agent readiness — 26/100 · 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 6 / 6
Protected Resource Metadata 0 / 5
Registration Without a Human 0 / 6
Agentic Commerce Well-Known Document 0 / 5
Regulatory Posture applies to this provider. Its tags matched the Horizontal (data, software, accessibility, platform) regime, so Regulatory Posture carries 15 points of the composite. If this regime is wrong for your business, say so on your provider repo — the applicability map is public and we will correct 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 75 points between them, because the conditional facet above carries the other 25. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 75% 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/google-pub-sub: 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 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 8

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

API Collection

OPEN COLLECTION

Google Pub/Sub Google Cloud Pub/Sub Publish API

OPEN COLLECTION

Google Pub/Sub Google Cloud Pub/Sub Publish Schemas API

OPEN COLLECTION

Google Pub/Sub Google Cloud Pub/Sub Publish Snapshots API

OPEN COLLECTION

Google Pub/Sub Google Cloud Pub/Sub Publish Subscribe API

OPEN COLLECTION

Google Pub/Sub Google Cloud Pub/Sub Publish Subscriptions API

OPEN COLLECTION

Google Pub/Sub Google Cloud Pub/Sub Publish Topics API

OPEN COLLECTION

Google Pub/Sub Google Cloud Pub/Sub API

OPEN COLLECTION

Scroll for all 8

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
deliveryModel:
  model: saas
  license_evidence:
    not_product:
    - googleapis/google-cloud-go
  open_source: unknown
  commercial: true
  callable_host: true
  label: Hosted service · you call their endpoint
  confidence: low
  source:
  - openapi
  - pricing
  - repository-not-product
  generated: '2026-09-25'
  method: derived
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
tags_raw:
- 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: '0.23'
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:
  - Schema
  tags_raw:
  - 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:
  - Subscription
  tags_raw:
  - 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:
  - Topic
  tags_raw:
  - 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

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