Google Cloud Eventarc

Google Cloud Eventarc is a fully managed eventing service that allows you to build event-driven architectures by routing events from Google Cloud services, SaaS applications, and custom sources to target destinations. Eventarc supports both standard and advanced editions, providing scalable, serverless event routing with built-in security, authorization, observability, and error handling.

Google Cloud Eventarc publishes 1 API contract indexed on the APIs.io network: Projects API. Tagged areas include Event-Driven, Event, Google Cloud, Messaging, and Serverless.

The Google Cloud Eventarc catalog on APIs.io includes 1 Spectral governance ruleset.

Google Cloud Eventarc’s developer surface includes developer portal, getting-started guide, documentation, authentication, pricing, support, and 13 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

50.0/100 developing ▬ flat Agent 20/100 agent aware saas Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

AccessFreemium

1 published contract

Event-Driven Event Google Cloud Messaging Serverless Triggers

Kin Score

Kin Score How this is scored →
scored 2026-11-06 · rubric v0.27.0

Composite quality — 50.0/100 · developing

Contract Quality 9.4 / 19

Developer Ergonomics 7.3 / 15

Access Clarity 10.7 / 15

Operational Transparency 3.6 / 10

Contract Governance 0.9 / 9

Discoverability 5.0 / 8

Regulatory Posture 3.8 / 15

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 20/100 · 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 0 / 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

Pagination 5 / 5

Distinct Operations 3 / 3

MCP Tool Quality 6 / 6

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/.

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Agent readiness — checks not met, largest first (exact, from this profile):

MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship
Idempotency +9 pts — OpenAPI mutating operations declare an idempotency key — a header, a request-body property, or a named de-duplication token whose own description says so (verified); else common[].type matches /idempoten/i (documented)
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Request/Response Examples +7 pts — share of operations carrying request/response examples; else an Examples / Code Samples link
Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document

9 more unmet checks in the Agent Readiness table above.

Kin Score — facets with the most composite points still available (weight × headroom):

Contract Quality scores 50.2 — up to +12.5 composite points
Contract Governance scores 9.8 — up to +10.8 composite points
Developer Ergonomics scores 48.8 — up to +10.2 composite points

Each check links to what satisfies it. Publish the artifact, or tell us where it already lives, and the score moves on the next scoring run.

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 the provider profile at artifacts.apis.io/google-cloud-eventarc/apis.yml: open an issue on github.com/api-evangelist/google-cloud-eventarc to ask a question or point us at an artifact you publish. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

Standards implemented 1

Standards this provider implements or carries. De facto ones are profiled and measured by the API Commons; formal ones come from the standards directory and are linked by the provider's own tags. The evidence column says how each claim was established — not that it was made.

OpenAPI

measured — observed by APIs.io (published)

APIs 1

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

Google Cloud Eventarc Projects API

The Projects API from Google Cloud Eventarc — 5 operation(s) for projects.

Postman Collections 1

Ready-to-run Postman collections for exercising this provider's APIs.

Google Cloud Eventarc Projects API

POSTMAN

Open Collections 2

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

Google Cloud Eventarc Projects API

OPEN COLLECTION

Google Cloud Eventarc API

OPEN COLLECTION

Google Cloud Eventarc API pricing

Prices published by Google Cloud Eventarc, read 2026-10-28 from cloud.google.com/eventarc/pricing. A free plan or tier is listed.

Plan	Price
Eventarc Standard — first 50,000 chargeable events monthly	Free Includes: The first 50,000 chargeable events in every calendar month
Eventarc Standard — events from Google sources	$0 per million events published
Eventarc Standard — events from Pub/Sub sources	$0 per million events published
Eventarc Standard — events from other sources	$1 per million events published (free while in Preview )
Eventarc Advanced — Bus publishing	$1.00/ 1,000,000 count
Eventarc Advanced — Pipeline messages	$0.50/ 1,000,000 count
Eventarc Advanced — Pipeline transformations	$0.40/ 1,000,000 count

Plan details, limits and sources →

Rate limits

Free Tier Default: 10 requests per minute
Free Tier Monthly Quota: 1000 requests per month
Professional Tier Default: 100 requests per minute

Compiled by API Evangelist, not yet checked against Google Cloud Eventarc's documentation. All 5 limits →

Billed by: million events published · FinOps profile →

Pricing Plans 1

Published pricing tiers and plan structures.

Google Cloud Eventarc Plans Pricing

7 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Google Cloud Eventarc Rate Limits

5 limits

RATE LIMITS

Service Levels 1

Uptime the provider promises or reports, as SLA4OAI. Read from its own pages; APIs.io runs no monitors.

Google Cloud Eventarc

SLA

FinOps 1

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

Google Cloud Eventarc Finops

FINOPS

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Google Cloud Eventarc — jsonschema rules

6 rules · 4 warnings 2 info

SPECTRAL

Security Posture 2

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

Google Cloud Eventarc Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Google Cloud Eventarc Vulnerability Disclosure

security.txt · contact published

SECURITY

Agentic Access 1

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

Google Cloud Eventarc Agentic Access

10 operations · 5 acting

AGENTIC

Resources

Get Started 2

Portal, sign-up, and the first successful call

Portal

Portal

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

Design & Contract 1

Pagination, idempotency, versioning, errors, and events

JSONLD

JSONLD

Build 2

SDKs, sample code, and the tooling you integrate with

PostmanWorkspace

PostmanWorkspace

GitHubOrganization

GitHubOrganization

Access & Security 3

Authentication, authorization, and security posture

VulnerabilityDisclosure

VulnerabilityDisclosure

DomainSecurity

DomainSecurity

Authentication

Authentication

Operate 3

Status, limits, changes, and where to get help

RateLimits

RateLimits

StatusPage

StatusPage

Support

Support

Commercial 5

Pricing, plans, and the legal terms of use

Plans

FinOps

Pricing

TermsOfService

PrivacyPolicy

Company 1

The organization behind the API

Website

Website

Source (apis.yml)

aid: google-cloud-eventarc
name: Google Cloud Eventarc
description: Google Cloud Eventarc is a fully managed eventing service that allows you to build event-driven architectures
  by routing events from Google Cloud services, SaaS applications, and custom sources to target destinations. Eventarc supports
  both standard and advanced editions, providing scalable, serverless event routing with built-in security, authorization,
  observability, and error handling.
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: unknown
  trial: false
  try_now: false
  public: false
  label: Freemium
  confidence: low
  source:
  - plans
  - security
  generated: '2026-11-06'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/google-cloud-eventarc.png
url: https://raw.githubusercontent.com/api-evangelist/google-cloud-eventarc/refs/heads/main/apis.yml
created: '2026-03-13'
modified: '2026-05-19'
specificationVersion: '0.23'
type: Index
tags:
- Event-Driven
- Event
- Google Cloud
- Messaging
- Serverless
- Triggers
tags_raw:
- Event-Driven
- Events
- Google Cloud
- Messaging
- Serverless
- Triggers
apis:
- aid: google-cloud-eventarc:google-cloud-eventarc-projects-api
  name: Google Cloud Eventarc Projects API
  description: The Projects API from Google Cloud Eventarc — 5 operation(s) for projects.
  humanURL: https://cloud.google.com/eventarc/docs
  baseURL: https://eventarc.googleapis.com
  tags:
  - Project
  tags_raw:
  - Projects
  properties:
  - type: OpenAPI
    url: openapi/google-cloud-eventarc-projects-api-openapi.yml
  - type: Documentation
    url: https://cloud.google.com/eventarc/docs/reference/rest
  - type: Authentication
    url: https://cloud.google.com/docs/authentication
  - type: GettingStarted
    url: https://cloud.google.com/eventarc/docs/quickstarts
  - type: JSONSchema
    url: json-schema/json-schema.yml
common:
- type: Plans
  url: plans/google-cloud-eventarc-plans-pricing.yml
- type: RateLimits
  url: rate-limits/google-cloud-eventarc-rate-limits.yml
- type: FinOps
  url: finops/google-cloud-eventarc-finops.yml
- type: Website
  url: https://www.google.com/
- type: PostmanWorkspace
  url: https://www.postman.com/kinlaneapi/google-cloud-eventarc/overview
- type: AgenticAccess
  url: agentic-access/google-cloud-eventarc-agentic-access.yml
- type: VulnerabilityDisclosure
  url: security/google-cloud-eventarc-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/google-cloud-eventarc-domain-security.yml
- type: GitHubOrganization
  url: https://github.com/GoogleCloudPlatform
- type: Portal
  url: https://cloud.google.com/eventarc
- type: GettingStarted
  url: https://cloud.google.com/eventarc/docs/quickstarts
- type: Documentation
  url: https://cloud.google.com/eventarc/docs
- type: Authentication
  url: https://cloud.google.com/docs/authentication
- type: Pricing
  url: https://cloud.google.com/eventarc/pricing
- type: TermsOfService
  url: https://cloud.google.com/terms
- type: PrivacyPolicy
  url: https://policies.google.com/privacy
- type: StatusPage
  url: https://status.cloud.google.com/
- type: Support
  url: https://cloud.google.com/eventarc/docs/support
- type: JSONLD
  url: json-ld/json-ld.json
- type: Integrations
  url: https://cloud.google.com/marketplace
integrations:
- name: Become a Partner
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
x-parent: google-cloud-platform
x-relationship: product

Google Cloud Eventarc API — frequently asked questions

Does Google Cloud Eventarc have an API?

Yes. APIs.io lists 1 API from Google Cloud Eventarc, including Google Cloud Eventarc Projects API.

Is there an OpenAPI specification for the Google Cloud Eventarc API?

Yes. APIs.io indexes 1 OpenAPI specification for Google Cloud Eventarc, each linked for download from this page.

How do I authenticate with the Google Cloud Eventarc API?

Google Cloud Eventarc uses bearer-token authentication.

How much does the Google Cloud Eventarc API cost?

Google Cloud Eventarc publishes its prices; its Eventarc Standard — events from Google sources plan is $0 per million events published as of 2026-10-28. APIs.io lists 7 pricing plans for Google Cloud Eventarc, with each plan's price, limits and inclusions under Pricing on this page.

Is the Google Cloud Eventarc API ready for AI agents?

Google Cloud Eventarc has a Kin Score of 50.0 out of 100 (developing) and an Agent Readiness score of 19.6 (agent-aware), scored by API Evangelist on 2026-11-06.

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