Google Cloud KMS

Google Cloud Key Management Service (KMS) allows you to create, import, and manage cryptographic keys and perform cryptographic operations in a central cloud service. It supports encryption, decryption, signing, and verification using symmetric and asymmetric keys for securing data and workloads.

Google Cloud KMS publishes 3 APIs on the APIs.io network: Crypto Keys API, Crypto Operations API, and Key Rings API. Tagged areas include Cryptography, Encryption, Google Cloud, Key Management, and KMS.

The Google Cloud KMS catalog on APIs.io includes 1 JSON-LD context and 1 Spectral governance ruleset.

Google Cloud KMS’s developer surface includes authentication, developer portal, getting-started guide, documentation, pricing, support, and 12 more developer resources.

🌐 Visit website 📡 Source on GitHub

47.0/100 developing ▬ flat Agent 25/100 agent aware saas Full breakdown ↓
scored 2026-09-25 · rubric v0.23.0

AccessFreemiumSelf serve⚡ Free to try

1 APIs

Cryptography Encryption Google Cloud Key Management KMS Security

Kin Score

Kin Score How this is scored →
scored 2026-09-25 · rubric v0.23.0

Composite quality — 47.0/100 · developing

Contract Quality 10.2 / 19

Developer Ergonomics 7.3 / 15

Access Clarity 7.1 / 15

Operational Transparency 2.6 / 10

Contract Governance 0.9 / 9

Discoverability 5.0 / 8

Regulatory Posture 6.0 / 15

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 25/100 · 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 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-cloud-kms: 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 3

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

Google Cloud KMS Crypto Keys API

The Crypto Keys API from Google Cloud KMS — 2 operation(s) for crypto keys.

Google Cloud KMS Crypto Operations API

The Crypto Operations API from Google Cloud KMS — 2 operation(s) for crypto operations.

Google Cloud KMS Key Rings API

The Key Rings API from Google Cloud KMS — 2 operation(s) for key rings.

Postman Collections 3

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

Google Cloud KMS Crypto Keys API

POSTMAN

Google Cloud KMS Crypto Keys Crypto Operations API

POSTMAN

Google Cloud KMS Crypto Keys Key Rings API

POSTMAN

Open Collections 5

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

API Collection

OPEN COLLECTION

Google Cloud KMS Crypto Keys API

OPEN COLLECTION

Google Cloud KMS Crypto Keys Crypto Operations API

OPEN COLLECTION

Google Cloud KMS Crypto Keys Key Rings API

OPEN COLLECTION

Google Cloud KMS API

OPEN COLLECTION

Pricing Plans 1

Published pricing tiers and plan structures.

Google Cloud Kms Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Google Cloud Kms Rate Limits

5 limits

RATE LIMITS

FinOps 1

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

Google Cloud Kms Finops

FINOPS

Semantic Vocabularies 1

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

context Context

3 classes · 0 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Google Cloud KMS API Rules

5 rules · 3 warnings 2 info

SPECTRAL

JSON Schema 1

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

CryptoKey

10 properties

JSON SCHEMA

Security Posture 3

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

Google Cloud Kms Authentication

oauth2 · 1 scheme

SECURITY

Google Cloud Kms Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Google Cloud Kms Vulnerability Disclosure

security.txt · contact published

SECURITY

Scopes 1

OAuth scopes governing access to this provider's APIs.

Google Cloud Kms Scopes

2 scopes · authorizationCode

2 scopes

SCOPES

Agentic Access 1

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

Google Cloud Kms Agentic Access

9 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

JSONLDContext

JSONLDContext

Build 2

SDKs, sample code, and the tooling you integrate with

PostmanWorkspace

PostmanWorkspace

GitHubOrganization

GitHubOrganization

Access & Security 5

Authentication, authorization, and security posture

VulnerabilityDisclosure

VulnerabilityDisclosure

DomainSecurity

Authentication

OAuthScopes

Authentication

Operate 2

Status, limits, changes, and where to get help

StatusPage

StatusPage

Support

Support

Commercial 3

Pricing, plans, and the legal terms of use

Pricing

Pricing

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Company 1

The organization behind the API

Website

Website

Source (apis.yml)

aid: google-cloud-kms
name: Google Cloud KMS
description: Google Cloud Key Management Service (KMS) allows you to create, import, and manage cryptographic keys and perform
  cryptographic operations in a central cloud service. It supports encryption, decryption, signing, and verification using
  symmetric and asymmetric keys for securing data and workloads.
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: high
  source:
  - plans
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/google-cloud-kms.png
url: https://raw.githubusercontent.com/api-evangelist/google-cloud-kms/refs/heads/main/apis.yml
created: '2026-03-13'
modified: '2026-05-19'
specificationVersion: '0.23'
type: Index
tags:
- Cryptography
- Encryption
- Google Cloud
- Key Management
- KMS
- Security
apis:
- aid: google-cloud-kms:google-cloud-kms-crypto-keys-api
  name: Google Cloud KMS Crypto Keys API
  description: The Crypto Keys API from Google Cloud KMS — 2 operation(s) for crypto keys.
  humanURL: https://cloud.google.com/kms
  baseURL: https://cloudkms.googleapis.com
  tags:
  - Crypto Keys
  properties:
  - type: OpenAPI
    url: openapi/google-cloud-kms-crypto-keys-api-openapi.yml
  - type: Documentation
    url: https://cloud.google.com/kms/docs/reference/rest
  - type: Authentication
    url: https://cloud.google.com/kms/docs/iam
  - type: GettingStarted
    url: https://cloud.google.com/kms/docs/quickstart
  - type: JSONSchema
    url: json-schema/crypto-key.json
  - type: JSONLDContext
    url: json-ld/context.jsonld
- aid: google-cloud-kms:google-cloud-kms-crypto-operations-api
  name: Google Cloud KMS Crypto Operations API
  description: The Crypto Operations API from Google Cloud KMS — 2 operation(s) for crypto operations.
  humanURL: https://cloud.google.com/kms
  baseURL: https://cloudkms.googleapis.com
  tags:
  - Crypto Operations
  properties:
  - type: OpenAPI
    url: openapi/google-cloud-kms-crypto-operations-api-openapi.yml
  - type: Documentation
    url: https://cloud.google.com/kms/docs/reference/rest
  - type: Authentication
    url: https://cloud.google.com/kms/docs/iam
  - type: GettingStarted
    url: https://cloud.google.com/kms/docs/quickstart
  - type: JSONSchema
    url: json-schema/crypto-key.json
  - type: JSONLDContext
    url: json-ld/context.jsonld
- aid: google-cloud-kms:google-cloud-kms-key-rings-api
  name: Google Cloud KMS Key Rings API
  description: The Key Rings API from Google Cloud KMS — 2 operation(s) for key rings.
  humanURL: https://cloud.google.com/kms
  baseURL: https://cloudkms.googleapis.com
  tags:
  - Key Rings
  properties:
  - type: OpenAPI
    url: openapi/google-cloud-kms-key-rings-api-openapi.yml
  - type: Documentation
    url: https://cloud.google.com/kms/docs/reference/rest
  - type: Authentication
    url: https://cloud.google.com/kms/docs/iam
  - type: GettingStarted
    url: https://cloud.google.com/kms/docs/quickstart
  - type: JSONSchema
    url: json-schema/crypto-key.json
  - type: JSONLDContext
    url: json-ld/context.jsonld
common:
- type: Website
  url: https://www.google.com/
- type: PostmanWorkspace
  url: https://www.postman.com/kinlaneapi/google-cloud-kms/overview
- type: AgenticAccess
  url: agentic-access/google-cloud-kms-agentic-access.yml
- type: VulnerabilityDisclosure
  url: security/google-cloud-kms-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/google-cloud-kms-domain-security.yml
- type: Authentication
  url: authentication/google-cloud-kms-authentication.yml
- type: OAuthScopes
  url: scopes/google-cloud-kms-scopes.yml
- type: GitHubOrganization
  url: https://github.com/googleapis
- type: Portal
  url: https://cloud.google.com/kms
- type: GettingStarted
  url: https://cloud.google.com/kms/docs/quickstart
- type: Documentation
  url: https://cloud.google.com/kms/docs
- type: Authentication
  url: https://cloud.google.com/kms/docs/iam
- type: Pricing
  url: https://cloud.google.com/kms/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/kms/docs/support
- type: JSONLDContext
  url: json-ld/context.jsonld
- 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

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