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 is listed with 2 APIs on the APIs.io network: Cloud Spanner Projects API and Cloud Spanner Scans 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 2 Spectral governance rulesets.

Google Cloud Spanner’s developer surface includes changelog, sandbox, authentication, developer portal, getting-started guide, documentation, pricing, and 44 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

64.4/100 strong ▲ 9.6 Agent 37/100 agent ready saas Full breakdown ↓
scored 2026-11-13 · rubric v0.28.0 · Show this score on your site →

AccessFreemiumSelf serveFree trial⚡ Free to try

2 APIs 1 MCP Servers

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

Kin Score

Kin Score How this is scored →
scored 2026-11-13 · rubric v0.28.0

Composite quality — 64.4/100 · strong

Contract Quality 12.2 / 19

Developer Ergonomics 10.3 / 15

Access Clarity 11.8 / 15

Operational Transparency 4.9 / 10

Contract Governance 2.0 / 9

Discoverability 4.9 / 8

Regulatory Posture 6.0 / 15

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 37/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 6

MCP Server 12 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 8 / 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 4 / 4

Delegated User Identity 6 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Pagination 5 / 5

Distinct Operations 0 / 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):

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) Ask about this →
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0 Ask about this →
Request/Response Examples +7 pts — share of operations carrying request/response examples; else an Examples / Code Samples link Ask about this →
Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document Ask about this →
Typed Event Surface +6 pts — AsyncAPI document, OR webhooks/callbacks objects in the as-published OpenAPI, OR common[].type includes Webhooks Ask about this →
Documented Reversibility +6 pts — a reversal operation in the contract, graded up when a window is documented too Ask about this →

6 more unmet checks in the Agent Readiness table above.

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

Contract Governance scores 22.0 — up to +9.4 composite points Ask about this →
Contract Quality scores 64.9 — up to +8.8 composite points Ask about this →
Operational Transparency scores 50.0 — up to +6.5 composite points Ask about this →

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.

Not sure how this applies to your stack? Ask about any one item. Kin Lane reads every question, looks at your profile and your situation, and replies with what a fix would take — scoped to that one area, priced up front, yours whether you ship it or not. Ask a question →

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-spanner/apis.yml: open an issue on github.com/api-evangelist/google-cloud-spanner 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 →

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.

Standards implemented 3

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.

Model Context Protocol (MCP)

measured — observed by APIs.io (documented)

OpenAPI

measured — observed by APIs.io (published)

OAuth 2.0

measured — observed by APIs.io (declared)

APIs 2

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

Google Cloud Spanner Cloud Spanner Projects API

The Cloud Spanner Projects API from Google Cloud Spanner — 71 operation(s) for cloud spanner projects.

Google Cloud Spanner Cloud Spanner Scans API

The Cloud Spanner Scans API from Google Cloud Spanner — 1 operation(s) for cloud spanner scans.

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 4

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

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

MCP Servers 1

Model Context Protocol servers that expose these APIs to AI agents.

Spanner MCP Server

Remote MCP server at spanner.googleapis.com requiring OAuth; 10 tools listed.

MCP SERVER

Google Cloud Spanner API pricing

Prices published by Google Cloud Spanner, read 2026-10-28 from cloud.google.com/spanner/pricing.

Plan	Price
Standard (regional compute, per node)	$0.90/ 1 hour
Enterprise (regional compute, per node)	$1.23/ 1 hour
Enterprise Plus (regional compute, per node)	$1.71/ 1 hour
Enterprise Plus dual-region compute	$4.617/ 1 hour
Enterprise Plus multi-region compute	$3.705/ 1 hour
Enterprise read-only replica compute	$0.41/ 1 hour
Enterprise Plus read-only replica compute	$0.57/ 1 hour
Regional SSD database storage	$0.000410959/ 1 gibibyte hour

All 13 plans, 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 Spanner's documentation. All 5 limits →

Billed by: gibibyte hour · FinOps profile →

Pricing Plans 1

Published pricing tiers and plan structures.

Google Cloud Spanner Plans Pricing

13 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Google Cloud Spanner Rate Limits

5 limits

RATE LIMITS

Terms of Service 1

What its API terms permit and prohibit, quoted from its own page.

Google Cloud Spanner

8 quoted statements, read from Google Cloud Spanner's own page on 2026-11-09.

TERMS

Eligibility 1

Who may sign up and where, quoted from its own terms.

Google Cloud Spanner

4 quoted statements, read from Google Cloud Spanner's own page on 2026-11-09.

ELIGIBILITY

AI Preferences 1

Its stance on AI training, inference and agents, quoted from its own pages.

Google Cloud Spanner

1 quoted statement, read from Google Cloud Spanner's own page on 2026-11-09.

AI PREFS

Data License 1

How its data and outputs may be reused, quoted from its own terms.

Google Cloud Spanner

1 quoted statement, read from Google Cloud Spanner's own page on 2026-11-09.

LICENSE

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 2

Spectral governance rulesets for linting and validating these APIs. Counts are the severity each rule declares, not results of running them.

Google Cloud Spanner — jsonschema rules

5 rules · 3 warn-severity 2 info-severity

SPECTRAL

Google Cloud Spanner API Rules

65 rules · 55 error-severity 9 warn-severity 1 info-severity

SPECTRAL

JSON Schema 8

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

Backup

20 properties

JSON SCHEMA

ExecuteSqlRequest

13 properties

JSON SCHEMA

InstanceConfig

14 properties

JSON SCHEMA

Instance

17 properties

JSON SCHEMA

ListScansResponse

2 properties

JSON SCHEMA

PartialResultSet

7 properties

JSON SCHEMA

Policy

3 properties

JSON SCHEMA

Google Cloud Spanner Instance

10 properties

JSON SCHEMA

Scroll for all 8

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 (API Evangelist recommendations) 1

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

Google Cloud Spanner Agentic Access

10 operations · 6 acting

AGENTIC

Resources

Get Started 5

Portal, sign-up, and the first successful call

Sandbox

Sandbox

Sandbox

Sandbox

Login

Portal

Portal

GettingStarted

GettingStarted

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

AIPreferences

AIPreferences

Agent Surfaces 4

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

MCPServer

WellKnown

AgenticAccess

Design & Contract 9

Pagination, idempotency, versioning, errors, and events

Spectral

Spectral

Vocabulary

DataModel

Lifecycle

ErrorCatalog

ErrorCatalog

Conformance

JSONLD

Scroll for all 9

Build 6

SDKs, sample code, and the tooling you integrate with

ToolCrosswalk

IntegrationEdges

SDKs

Packages

PostmanWorkspace

GitHubOrganization

GitHubOrganization

Access & Security 6

Authentication, authorization, and security posture

Security

Security

VulnerabilityDisclosure

VulnerabilityDisclosure

DomainSecurity

Authentication

OAuthScopes

Authentication

Operate 4

Status, limits, changes, and where to get help

ChangeLog

RateLimits

StatusPage

Support

Commercial 7

Pricing, plans, and the legal terms of use

Plans

FinOps

Pricing

TermsOfService

PrivacyPolicy

UsageTerms

DataLicense

Scroll for all 7

Company 2

The organization behind the API

Website

Website

Blog

Blog

Other 6

Properties that don't map to a standard resource type

Protobuf

Protobuf

Protobuf

Hosts

CapabilityMap

Eligibility

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: true
  try_now: true
  public: false
  gated: none
  gated_source:
  - onboarding
  label: Freemium (free trial) · Self-serve signup
  confidence: high
  source:
  - plans
  - authentication
  - security
  - sandbox
  generated: '2026-11-13'
  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
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
common:
- type: Spectral
  url: rules/google-cloud-spanner-rules.yml
- type: Spectral
  url: rules/google-cloud-spanner-jsonschema-spectral-rules.yml
- type: Vocabulary
  url: vocabulary/google-cloud-spanner-vocabulary.yml
- type: DataModel
  url: data-model/google-cloud-spanner-data-model.yml
- type: ChangeLog
  url: changelog/google-cloud-spanner-changelog.yml
- type: Sandbox
  url: sandbox/google-cloud-spanner-sandbox.yml
- type: Lifecycle
  url: lifecycle/google-cloud-spanner-lifecycle.yml
- type: ErrorCatalog
  url: errors/google-cloud-spanner-error-codes.yml
- type: ErrorCatalog
  url: errors/google-cloud-spanner-problem-types.yml
- type: Conformance
  url: conformance/google-cloud-spanner-conformance.yml
- type: Protobuf
  url: grpc/google-cloud-spanner-spanner.proto
- type: Protobuf
  url: grpc/google-cloud-spanner-instance-admin.proto
- type: Protobuf
  url: grpc/google-cloud-spanner-database-admin.proto
- type: LLMsTxt
  url: llms/google-cloud-spanner-llms.txt
- type: ToolCrosswalk
  url: mcp/google-cloud-spanner-tool-crosswalk.yml
- type: MCPServer
  url: mcp/google-cloud-spanner-mcp.yml
- type: WellKnown
  url: well-known/google-cloud-spanner-well-known.yml
- type: Hosts
  url: hosts/google-cloud-spanner-hosts.yml
- type: IntegrationEdges
  url: integrations/google-cloud-spanner-integration-edges.yml
- type: SDKs
  url: packages/google-cloud-spanner-packages.yml
- type: Packages
  url: packages/google-cloud-spanner-packages.yml
- type: Security
  url: https://accounts.google.com/ServiceLogin?hl=en-US&continue=https://myaccount.google.com/intro/security
- type: Sandbox
  url: https://play.google.com/console/about/
- type: Login
  url: https://accounts.google.com/v3/signin/identifier?continue=https://docs.google.com/&emr=1&followup=https://docs.google.com/&osid=1&passive=1209600&flowName=GlifWebSignIn&flowEntry=ServiceLogin&dsh=S639346758:1794451869124516
- 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://cloud.google.com/spanner
- 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
- type: UsageTerms
  url: terms/google-cloud-spanner-terms-of-service.yml
- type: Eligibility
  url: eligibility/google-cloud-spanner-eligibility.yml
- type: AIPreferences
  url: ai-preferences/google-cloud-spanner-ai-preferences.yml
- type: DataLicense
  url: data-license/google-cloud-spanner-data-license.yml
apis:
- aid: google-cloud-spanner:google-cloud-spanner-projects-api
  name: Google Cloud Spanner Cloud Spanner Projects API
  description: The Cloud Spanner Projects API from Google Cloud Spanner — 71 operation(s) for cloud spanner projects.
  humanURL: https://cloud.google.com/spanner/docs
  baseURL: https://spanner.googleapis.com
  tags:
  - Cloud Spanner Projects
  properties:
  - type: OpenAPI
    url: openapi/google-cloud-spanner-projects-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/google-cloud-spanner-backup-schema.json
  - type: JSONSchema
    url: json-schema/google-cloud-spanner-instance-schema.json
  - type: JSONSchema
    url: json-schema/google-cloud-spanner-instance-config-schema.json
  - type: JSONSchema
    url: json-schema/google-cloud-spanner-policy-schema.json
  - type: JSONSchema
    url: json-schema/google-cloud-spanner-execute-sql-request-schema.json
  - type: JSONSchema
    url: json-schema/google-cloud-spanner-partial-result-set-schema.json
- aid: google-cloud-spanner:google-cloud-spanner-scans-api
  name: Google Cloud Spanner Cloud Spanner Scans API
  description: The Cloud Spanner Scans API from Google Cloud Spanner — 1 operation(s) for cloud spanner scans.
  humanURL: https://cloud.google.com/spanner/docs
  baseURL: https://spanner.googleapis.com
  tags:
  - Cloud Spanner Scans
  properties:
  - type: OpenAPI
    url: openapi/google-cloud-spanner-scans-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/google-cloud-spanner-list-scans-response-schema.json
integrations:
- name: Become a Partner
x-parent: google-cloud-platform
x-relationship: product
x-enrichment:
  date: '2026-11-11'
  status: enriched
  artifacts_added: 12
  pass: local-v6

Google Cloud Spanner API — frequently asked questions

Does Google Cloud Spanner have an API?

Yes. APIs.io lists 2 APIs from Google Cloud Spanner, including Google Cloud Spanner Cloud Spanner Projects API and Google Cloud Spanner Cloud Spanner Scans API.

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

Yes. APIs.io indexes 2 OpenAPI specifications for Google Cloud Spanner, each linked for download from this page.

How do I authenticate with the Google Cloud Spanner API?

Google Cloud Spanner documents its authentication (oauth2 · 1 scheme). The details are profiled on APIs.io as Google Cloud Spanner Authentication.

How much does the Google Cloud Spanner API cost?

Google Cloud Spanner publishes its prices; its Standard (regional compute, per node) plan is $0.90/ 1 hour as of 2026-10-28. APIs.io lists 13 pricing plans for Google Cloud Spanner, with each plan's price, limits and inclusions under Pricing on this page.

Does Google Cloud Spanner have an MCP server?

Yes. APIs.io lists 1 MCP server for Google Cloud Spanner: Remote MCP server at spanner.googleapis.com requiring OAuth; 10 tools listed.

Is the Google Cloud Spanner API ready for AI agents?

Google Cloud Spanner has a Kin Score of 64.4 out of 100 (strong) and an Agent Readiness score of 37.4 (agent-ready), scored by API Evangelist on 2026-11-13.

Work with this as data

Every provider here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

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.

All 92 tools →

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