Google Cloud Spanner website screenshot

Google Cloud Spanner

Google Cloud Spanner is a fully managed, mission-critical relational database service that offers transactional consistency at global scale, automatic synchronous replication, and schemas with SQL support. It combines the benefits of relational database structure with non-relational horizontal scale, providing up to 99.999% availability.

Google Cloud Spanner publishes 3 APIs on the APIs.io network: Databases API, Instances API, and Sessions API. Tagged areas include Database, Distributed, Google Cloud, Relational, and SQL.

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

Google Cloud Spanner’s developer surface includes authentication, developer portal, getting-started guide, documentation, pricing, support, engineering blog, and 11 more developer resources.

🌐 Visit website 📡 Source on GitHub
63.0/100 strong ▬ flat Agent 31/100 agent aware Full breakdown ↓
scored 2026-07-28 · rubric v0.6
AccessFreemiumSelf serve⚡ Free to try
3 APIs
DatabaseDistributedGoogle CloudRelationalSQL

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-07-28 · rubric v0.6
Composite quality — 63.0/100 · strong
Contract Quality 17.6 / 25
Developer Ergonomics 10.0 / 20
Commercial Clarity 14.2 / 20
Operational Transparency 6.8 / 13
Governance 7.0 / 12
Discoverability 7.4 / 10
Agent readiness — 31/100 · agent aware
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 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
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-spanner: 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 Spanner Databases API

Operations on Spanner databases

Google Cloud Spanner Instances API

Operations on Spanner instances

Google Cloud Spanner Sessions API

Operations on database sessions

Postman Collections 3

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

Google Cloud Spanner Databases API

POSTMAN

Google Cloud Spanner Databases Instances API

POSTMAN

Google Cloud Spanner Databases Sessions API

POSTMAN

Open Collections 1

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

Google Cloud Spanner API

OPEN COLLECTION

Pricing Plans 1

Published pricing tiers and plan structures.

Google Cloud Spanner Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Google Cloud Spanner Rate Limits

5 limits

RATE LIMITS

FinOps 1

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

Google Cloud Spanner Finops

FINOPS

Semantic Vocabularies 1

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

Google Cloud Spanner Context

16 classes · 0 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Google Cloud Spanner API Rules

5 rules · 3 warnings 2 info

SPECTRAL

JSON Schema 1

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

Google Cloud Spanner Instance

10 properties

JSON SCHEMA

Security Posture 3

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

Google Cloud Spanner Authentication

oauth2 · 1 scheme

SECURITY

Google Cloud Spanner Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Google Cloud Spanner Vulnerability Disclosure

security.txt · contact published

SECURITY

Scopes 1

OAuth scopes governing access to this provider's APIs.

Google Cloud Spanner Scopes

3 scopes · authorizationCode

3 scopes

SCOPES

Agentic Access 1

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

Google Cloud Spanner Agentic Access

10 operations · 6 acting

10 operations · 6 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 5

Authentication, authorization, and security posture

VulnerabilityDisclosure
VulnerabilityDisclosure
 DomainSecurity
DomainSecurity
 Authentication
Authentication
 OAuthScopes
OAuthScopes
 Authentication
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

Blog
Blog

Source (apis.yml)

apis.yml Raw ↑ 
aid: google-cloud-spanner
name: Google Cloud Spanner
description: Google Cloud Spanner is a fully managed, mission-critical relational database service that offers transactional
  consistency at global scale, automatic synchronous replication, and schemas with SQL support. It combines the benefits of
  relational database structure with non-relational horizontal scale, providing up to 99.999% availability.
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-spanner.png
url: https://raw.githubusercontent.com/api-evangelist/google-cloud-spanner/refs/heads/main/apis.yml
created: '2026-03-13'
modified: '2026-05-19'
specificationVersion: '0.19'
type: Index
tags:
- Database
- Distributed
- Google Cloud
- Relational
- SQL
apis:
- aid: google-cloud-spanner:google-cloud-spanner-databases-api
  name: Google Cloud Spanner Databases API
  description: Operations on Spanner databases
  humanURL: https://cloud.google.com/spanner/docs
  baseURL: https://spanner.googleapis.com/v1
  tags:
  - Databases
  properties:
  - type: OpenAPI
    url: openapi/google-cloud-spanner-databases-api-openapi.yml
  - type: Documentation
    url: https://cloud.google.com/spanner/docs/reference/rest
  - type: Authentication
    url: https://cloud.google.com/spanner/docs/authentication
  - type: GettingStarted
    url: https://cloud.google.com/spanner/docs/getting-started/rest
  - type: JSONSchema
    url: json-schema/instance-schema.json
- aid: google-cloud-spanner:google-cloud-spanner-instances-api
  name: Google Cloud Spanner Instances API
  description: Operations on Spanner instances
  humanURL: https://cloud.google.com/spanner/docs
  baseURL: https://spanner.googleapis.com/v1
  tags:
  - Instances
  properties:
  - type: OpenAPI
    url: openapi/google-cloud-spanner-instances-api-openapi.yml
  - type: Documentation
    url: https://cloud.google.com/spanner/docs/reference/rest
  - type: Authentication
    url: https://cloud.google.com/spanner/docs/authentication
  - type: GettingStarted
    url: https://cloud.google.com/spanner/docs/getting-started/rest
  - type: JSONSchema
    url: json-schema/instance-schema.json
- aid: google-cloud-spanner:google-cloud-spanner-sessions-api
  name: Google Cloud Spanner Sessions API
  description: Operations on database sessions
  humanURL: https://cloud.google.com/spanner/docs
  baseURL: https://spanner.googleapis.com/v1
  tags:
  - Sessions
  properties:
  - type: OpenAPI
    url: openapi/google-cloud-spanner-sessions-api-openapi.yml
  - type: Documentation
    url: https://cloud.google.com/spanner/docs/reference/rest
  - type: Authentication
    url: https://cloud.google.com/spanner/docs/authentication
  - type: GettingStarted
    url: https://cloud.google.com/spanner/docs/getting-started/rest
  - type: JSONSchema
    url: json-schema/instance-schema.json
common:
- type: PostmanWorkspace
  url: https://www.postman.com/kinlaneapi/google-cloud-spanner/overview
- type: AgenticAccess
  url: agentic-access/google-cloud-spanner-agentic-access.yml
- type: VulnerabilityDisclosure
  url: security/google-cloud-spanner-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/google-cloud-spanner-domain-security.yml
- type: Authentication
  url: authentication/google-cloud-spanner-authentication.yml
- type: OAuthScopes
  url: scopes/google-cloud-spanner-scopes.yml
- type: GitHubOrganization
  url: https://github.com/GoogleCloudPlatform
- type: Portal
  url: https://cloud.google.com/spanner
- type: GettingStarted
  url: https://cloud.google.com/spanner/docs/getting-started/rest
- type: Documentation
  url: https://cloud.google.com/spanner/docs
- type: Authentication
  url: https://cloud.google.com/spanner/docs/authentication
- type: Pricing
  url: https://cloud.google.com/spanner/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/spanner/docs/support
- type: JSONLD
  url: json-ld/google-cloud-spanner-context.jsonld
- type: Integrations
  url: https://cloud.google.com/marketplace
- url: https://cloud.google.com/feeds/spanner-release-notes.xml
  type: Blog
integrations:
- name: Become a Partner
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com