Google Cloud App Engine

Google Cloud App Engine is a fully managed, serverless platform for developing and hosting web applications at scale. It supports popular programming languages and provides built-in services and APIs such as NoSQL datastores, memcache, and a user authentication API, allowing developers to focus on writing code without managing the underlying infrastructure.

Google Cloud App Engine publishes 4 API contracts indexed on the APIs.io network, including Applications API, Apps API, Instances API, and 1 more. Tagged areas include App Engine, Compute, Google Cloud, Platform-as-a-Service, and Serverless.

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

Google Cloud App Engine’s developer surface includes authentication, developer portal, getting-started guide, documentation, pricing, support, and 16 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

51.8/100 developing ▬ flat Agent 25/100 agent aware saas Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

AccessPaidSelf serve

1 published contract

App EngineCompute Google Cloud Platform-as-a-Service Serverless Web Applications

What this lets a business do 2

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

Information Technology Management

BC-600

ApplicationsAppsInstances

GET /apps/{appsId} PATCH /apps/{appsId} GET /apps/{appsId}/services DELETE /apps/{appsId}/services/{servicesId}

Software Release & Deployment Management

BC-4210

Versions

POST /apps/{appsId}/services/{servicesId}/versions

Kin Score

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

Composite quality — 51.8/100 · developing

Contract Quality 10.9 / 19

Developer Ergonomics 5.5 / 15

Access Clarity 10.7 / 15

Operational Transparency 3.6 / 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

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

8 more unmet checks in the Agent Readiness table above.

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

Developer Ergonomics scores 36.9 — up to +12.6 composite points
Contract Governance scores 9.8 — up to +10.8 composite points
Contract Quality scores 58.1 — up to +10.5 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-app-engine/apis.yml: open an issue on github.com/api-evangelist/google-cloud-app-engine 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 2

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)

OAuth 2.0

measured — observed by APIs.io (declared)

APIs 4

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

Google Cloud App Engine Applications API

Manage App Engine applications

Google Cloud App Engine Apps API

The Apps API from Google Cloud App Engine — 2 operation(s) for apps.

Google Cloud App Engine Instances API

Manage instances running a version

Google Cloud App Engine Versions API

Manage versions of a service

Postman Collections 4

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

Google Cloud App Engine Admin Applications API

POSTMAN

Google Cloud App Engine Admin Applications Apps API

POSTMAN

Google Cloud App Engine Admin Applications Instances API

POSTMAN

Google Cloud App Engine Admin Applications Versions API

POSTMAN

Open Collections 5

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

Google Cloud App Engine Admin API

OPEN COLLECTION

Google Cloud App Engine Admin Applications API

OPEN COLLECTION

Google Cloud App Engine Admin Applications Apps API

OPEN COLLECTION

Google Cloud App Engine Admin Applications Instances API

OPEN COLLECTION

Google Cloud App Engine Admin Applications Versions API

OPEN COLLECTION

Google Cloud App Engine API pricing

Prices published by Google Cloud App Engine, read 2026-10-28 from cloud.google.com/appengine/pricing.

Plan	Price
Standard environment instance class B1	$0.05/ 1 hour, per 1 day/ project Includes: 0 hour to 9 hour Free per 1 day / project
Standard environment instance class B2	$0.10/ 1 hour, per 1 day/ project Includes: 0 hour to 9 hour Free per 1 day / project
Standard environment instance class B4	$0.20/ 1 hour, per 1 day/ project Includes: 0 hour to 9 hour Free per 1 day / project
Standard environment instance class B4_1G	$0.30/ 1 hour, per 1 day/ project Includes: 0 hour to 9 hour Free per 1 day / project
Standard environment instance class B8	$0.40/ 1 hour, per 1 day/ project Includes: 0 hour to 9 hour Free per 1 day / project
Standard environment instance class F1/F2/F4/F4_1G	28 hour and above $0.05/ 1 hour, per 1 day/ project Includes: 0 hour to 28 hour Free per 1 day / project
Outgoing network traffic (standard)	$0.138948/ 1 gibibyte, per 1 day/ project Includes: 0 gibibyte to 1 gibibyte Free per 1 day / project
Dedicated memcache	$0.06/ 1 gibibyte hour

All 15 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 App Engine's documentation. All 5 limits →

Billed by: instance hour · FinOps profile →

Pricing Plans 1

Published pricing tiers and plan structures.

Google Cloud App Engine Plans Pricing

15 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Google Cloud App Engine 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 App Engine

SLA

FinOps 1

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

Google Cloud App Engine Finops

FINOPS

Semantic Vocabularies 1

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

Appengine Context

11 classes · 3 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Google Cloud App Engine — jsonschema rules

5 rules · 3 warnings 2 info

SPECTRAL

JSON Schema 1

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

Google Cloud App Engine Application

10 properties

JSON SCHEMA

Security Posture 3

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

Google Cloud App Engine Authentication

oauth2 · 1 scheme

SECURITY

Google Cloud App Engine Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Google Cloud App Engine Vulnerability Disclosure

security.txt · contact published

SECURITY

Scopes 1

OAuth scopes governing access to this provider's APIs.

Google Cloud App Engine Scopes

2 scopes · authorizationCode

2 scopes

SCOPES

Agentic Access 1

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

Google Cloud App Engine Agentic Access

8 operations · 3 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 1

The organization behind the API

Website

Website

Other 1

Properties that don't map to a standard resource type

CapabilityMap

CapabilityMap

Source (apis.yml)

aid: google-cloud-app-engine
name: Google Cloud App Engine
description: Google Cloud App Engine is a fully managed, serverless platform for developing and hosting web applications at
  scale. It supports popular programming languages and provides built-in services and APIs such as NoSQL datastores, memcache,
  and a user authentication API, allowing developers to focus on writing code without managing the underlying infrastructure.
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: paid
  onboarding: self-serve
  trial: false
  try_now: false
  public: false
  gated: none
  gated_source:
  - onboarding
  label: Paid · Self-serve signup
  confidence: medium
  source:
  - plans
  - authentication
  - security
  generated: '2026-11-06'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/google-cloud-app-engine.png
url: https://raw.githubusercontent.com/api-search/google-cloud-app-engine/refs/heads/main/apis.yml
created: '2026-03-13'
modified: '2026-05-19'
specificationVersion: '0.23'
type: Index
tags:
- App Engine
- Compute
- Google Cloud
- Platform-as-a-Service
- Serverless
- Web Applications
tags_raw:
- App Engine
- Compute
- Google Cloud
- PaaS
- Serverless
- Web Applications
apis:
- aid: google-cloud-app-engine:google-cloud-app-engine-applications-api
  name: Google Cloud App Engine Applications API
  description: Manage App Engine applications
  humanURL: https://cloud.google.com/appengine/docs/admin-api
  baseURL: https://appengine.googleapis.com
  tags:
  - Application
  tags_raw:
  - Applications
  properties:
  - type: OpenAPI
    url: openapi/google-cloud-app-engine-applications-api-openapi.yml
  - type: Documentation
    url: https://cloud.google.com/appengine/docs/admin-api/reference/rest
  - type: Authentication
    url: https://cloud.google.com/appengine/docs/admin-api/access-control
  - type: GettingStarted
    url: https://cloud.google.com/appengine/docs/getting-started
  - type: JSONSchema
    url: json-schema/appengine-application.json
- aid: google-cloud-app-engine:google-cloud-app-engine-apps-api
  name: Google Cloud App Engine Apps API
  description: The Apps API from Google Cloud App Engine — 2 operation(s) for apps.
  humanURL: https://cloud.google.com/appengine/docs/admin-api
  baseURL: https://appengine.googleapis.com
  tags:
  - Application
  tags_raw:
  - Apps
  properties:
  - type: OpenAPI
    url: openapi/google-cloud-app-engine-apps-api-openapi.yml
  - type: Documentation
    url: https://cloud.google.com/appengine/docs/admin-api/reference/rest
  - type: Authentication
    url: https://cloud.google.com/appengine/docs/admin-api/access-control
  - type: GettingStarted
    url: https://cloud.google.com/appengine/docs/getting-started
  - type: JSONSchema
    url: json-schema/appengine-application.json
- aid: google-cloud-app-engine:google-cloud-app-engine-instances-api
  name: Google Cloud App Engine Instances API
  description: Manage instances running a version
  humanURL: https://cloud.google.com/appengine/docs/admin-api
  baseURL: https://appengine.googleapis.com
  tags:
  - Instances
  properties:
  - type: OpenAPI
    url: openapi/google-cloud-app-engine-instances-api-openapi.yml
  - type: Documentation
    url: https://cloud.google.com/appengine/docs/admin-api/reference/rest
  - type: Authentication
    url: https://cloud.google.com/appengine/docs/admin-api/access-control
  - type: GettingStarted
    url: https://cloud.google.com/appengine/docs/getting-started
  - type: JSONSchema
    url: json-schema/appengine-application.json
- aid: google-cloud-app-engine:google-cloud-app-engine-versions-api
  name: Google Cloud App Engine Versions API
  description: Manage versions of a service
  humanURL: https://cloud.google.com/appengine/docs/admin-api
  baseURL: https://appengine.googleapis.com
  tags:
  - Versions
  properties:
  - type: OpenAPI
    url: openapi/google-cloud-app-engine-versions-api-openapi.yml
  - type: Documentation
    url: https://cloud.google.com/appengine/docs/admin-api/reference/rest
  - type: Authentication
    url: https://cloud.google.com/appengine/docs/admin-api/access-control
  - type: GettingStarted
    url: https://cloud.google.com/appengine/docs/getting-started
  - type: JSONSchema
    url: json-schema/appengine-application.json
common:
- type: Plans
  url: plans/google-cloud-app-engine-plans-pricing.yml
- type: RateLimits
  url: rate-limits/google-cloud-app-engine-rate-limits.yml
- type: FinOps
  url: finops/google-cloud-app-engine-finops.yml
- type: CapabilityMap
  url: capabilities/google-cloud-app-engine-capability-edges.yml
  name: Google Cloud App Engine Business Capability Map
- type: Website
  url: https://www.google.com/
- type: PostmanWorkspace
  url: https://www.postman.com/kinlaneapi/google-cloud-app-engine/overview
- type: AgenticAccess
  url: agentic-access/google-cloud-app-engine-agentic-access.yml
- type: VulnerabilityDisclosure
  url: security/google-cloud-app-engine-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/google-cloud-app-engine-domain-security.yml
- type: Authentication
  url: authentication/google-cloud-app-engine-authentication.yml
- type: OAuthScopes
  url: scopes/google-cloud-app-engine-scopes.yml
- type: GitHubOrganization
  url: https://github.com/GoogleCloudPlatform
- type: Portal
  url: https://cloud.google.com/appengine
- type: GettingStarted
  url: https://cloud.google.com/appengine/docs/getting-started
- type: Documentation
  url: https://cloud.google.com/appengine/docs
- type: Authentication
  url: https://cloud.google.com/docs/authentication
- type: Pricing
  url: https://cloud.google.com/appengine/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/appengine/docs/support
- type: JSONLD
  url: json-ld/appengine-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

Google Cloud App Engine API — frequently asked questions

Does Google Cloud App Engine have an API?

Yes. APIs.io lists 4 APIs from Google Cloud App Engine, including Google Cloud App Engine Applications API, Google Cloud App Engine Apps API and Google Cloud App Engine Instances API, and 1 more.

Is there an OpenAPI specification for the Google Cloud App Engine API?

Yes. APIs.io indexes 4 OpenAPI specifications for Google Cloud App Engine, each linked for download from this page.

How do I authenticate with the Google Cloud App Engine API?

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

How much does the Google Cloud App Engine API cost?

Google Cloud App Engine publishes its prices; its Standard environment instance class B1 plan is $0.05/ 1 hour, per 1 day/ project as of 2026-10-28. APIs.io lists 15 pricing plans for Google Cloud App Engine, with each plan's price, limits and inclusions under Pricing on this page.

Is the Google Cloud App Engine API ready for AI agents?

Google Cloud App Engine has a Kin Score of 51.8 out of 100 (developing) and an Agent Readiness score of 24.6 (agent-aware), scored by API Evangelist on 2026-11-06.

Work with this as data

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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.

All 92 tools →

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