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 API contracts indexed 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 16 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

47.1/100 developing ▬ flat Agent 23/100 agent aware saas Full breakdown ↓
scored 2026-10-17 · rubric v0.24.0

AccessFreemiumSelf serve⚡ Free to try

1 published contract

Database Distributed Google Cloud Relational SQL

What this lets a business do 1

Business capabilities this provider's published APIs can perform, derived from its own contracts. Browse all capabilities →

Information Technology Management

BC-600

DatabasesInstances

POST /projects/{project}/instances PATCH /projects/{project}/instances/{instance} DELETE /projects/{project}/instances/{instance} POST /projects/{project}/instances/{instance}/databases

Kin Score

Kin Score How this is scored →
scored 2026-10-17 · rubric v0.24.0

Composite quality — 47.1/100 · developing

Contract Quality 11.0 / 19

Developer Ergonomics 7.7 / 15

Access Clarity 5.9 / 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 — 23/100 · 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-spanner: 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 →

Markets this provider is in provisional

The Kin Score Market layer reads a provider inside its market: its position, and how deep its integrations go. Depth is only comparable within a position. Provisional and unweighted: not part of the Kin Score or agent readiness.

Market	Position	Depth	Registered MCP server	Declares compatibility
Databases (PostgreSQL wire)	undeclared	-	-	1

Registered MCP server and declares compatibility are report only — not weighted. Undeclared means we found nothing we can read, so there is no number: we never infer integrations.

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 5

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

API Collection

OPEN COLLECTION

Google Cloud Spanner API

OPEN COLLECTION

Google Cloud Spanner Databases API

OPEN COLLECTION

Google Cloud Spanner Databases Instances API

OPEN COLLECTION

Google Cloud Spanner Databases Sessions 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 — jsonschema 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

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

Authentication

OAuthScopes

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 2

The organization behind the API

Website

Website

Blog

Blog

Other 1

Properties that don't map to a standard resource type

CapabilityMap

CapabilityMap

Source (apis.yml)

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.
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-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: '0.23'
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:
  - Database
  tags_raw:
  - 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: Plans
  url: plans/google-cloud-spanner-plans-pricing.yml
- type: RateLimits
  url: rate-limits/google-cloud-spanner-rate-limits.yml
- type: FinOps
  url: finops/google-cloud-spanner-finops.yml
- type: CapabilityMap
  url: capabilities/google-cloud-spanner-capability-edges.yml
  name: Google Cloud Spanner Business Capability Map
- type: Website
  url: https://www.google.com/
- 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
x-parent: google-cloud-platform
x-relationship: product

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Tools for providers

9 MCP tools reach this

find_providersBrowse and filter every provider in the catalog.
get_provider_artifactsEvery artifact this provider publishes, grouped by type.
get_provider_operationsEvery operation across all of their OpenAPIs — one call instead of parsing every spec.
get_provider_toolsEvery MCP tool they ship, with the operation each wraps.
get_provider_evidenceHow each part of their score was established. Free — the basis for a claim should not sit behind it.
get_provider_ratingPRO — composite, band, trend and facet scores.
apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
resolveTurn a domain, URL or GitHub org into the provider it belongs to.
find_cohortsEvery scored population of providers in the catalog.

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