Google Knowledge Graph Search website screenshot

Google Knowledge Graph Search

The Google Knowledge Graph Search API allows developers to search for entities (people, places, things) in the Google Knowledge Graph and retrieve structured data about them in JSON-LD format conforming to schema.org standards. Results include names, descriptions, images, and detailed descriptions with relevance scoring.

Google Knowledge Graph Search publishes 1 API on the APIs.io network: Entities:search API. Tagged areas include Entities, Google, Knowledge Graph, Linked Data, and Schema.org.

The Google Knowledge Graph Search catalog on APIs.io includes 1 JSON-LD context and 2 Spectral governance rulesets.

Google Knowledge Graph Search’s developer surface includes authentication, developer portal, getting-started guide, documentation, support, and 9 more developer resources.

🌐 Visit website 📡 Source on GitHub
59.2/100 strong ▬ flat Agent 31/100 agent aware Full breakdown ↓
scored 2026-07-28 · rubric v0.6
AccessFreemiumSelf serve⚡ Free to try
1 APIs
EntitiesGoogleKnowledge GraphLinked DataSchema.orgSemantic Search

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-07-28 · rubric v0.6
Composite quality — 59.2/100 · strong
Contract Quality 17.6 / 25
Developer Ergonomics 9.6 / 20
Commercial Clarity 12.1 / 20
Operational Transparency 6.2 / 13
Governance 7.0 / 12
Discoverability 6.9 / 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-knowledge-graph: 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 1

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

Google Knowledge Graph Search Entities:search API

The Entities:search API from Google Knowledge Graph Search — 1 operation(s) for entities:search.

Postman Collections 1

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

Google Knowledge Graph Search Entities:search API

POSTMAN

Open Collections 1

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

Google Knowledge Graph Search API

OPEN COLLECTION

Pricing Plans 1

Published pricing tiers and plan structures.

Google Knowledge Graph Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Google Knowledge Graph Rate Limits

5 limits

RATE LIMITS

FinOps 1

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

Google Knowledge Graph Finops

FINOPS

Semantic Vocabularies 1

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

context Context

14 classes · 0 properties

JSON-LD

Spectral Rules 2

Spectral governance rulesets for linting and validating these APIs.

Google Knowledge Graph Search API Rules

5 rules · 3 warnings 2 info

SPECTRAL

Google Knowledge Graph Search API Rules

17 rules · 11 errors 5 warnings 1 info

SPECTRAL

JSON Schema 1

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

Google Knowledge Graph Entity

7 properties

JSON SCHEMA

Security Posture 3

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

Google Knowledge Graph Authentication

apiKey · 1 scheme

SECURITY

Google Knowledge Graph Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Google Knowledge Graph Vulnerability Disclosure

security.txt · contact published

SECURITY

Agentic Access 1

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

Google Knowledge Graph Agentic Access

1 operation

1 operations · 0 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 1

SDKs, sample code, and the tooling you integrate with

PostmanWorkspace
PostmanWorkspace

Access & Security 4

Authentication, authorization, and security posture

VulnerabilityDisclosure
VulnerabilityDisclosure
 DomainSecurity
DomainSecurity
 Authentication
Authentication
 Authentication
Authentication

Operate 2

Status, limits, changes, and where to get help

StatusPage
StatusPage
 Support
Support

Commercial 2

Pricing, plans, and the legal terms of use

TermsOfService
TermsOfService
 PrivacyPolicy
PrivacyPolicy

Source (apis.yml)

apis.yml Raw ↑ 
aid: google-knowledge-graph
name: Google Knowledge Graph Search
description: The Google Knowledge Graph Search API allows developers to search for entities (people, places, things) in the
  Google Knowledge Graph and retrieve structured data about them in JSON-LD format conforming to schema.org standards. Results
  include names, descriptions, images, and detailed descriptions with relevance scoring.
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-knowledge-graph.png
url: https://raw.githubusercontent.com/api-evangelist/google-knowledge-graph/refs/heads/main/apis.yml
created: '2026-03-13'
modified: '2026-05-19'
specificationVersion: '0.19'
type: Index
tags:
- Entities
- Google
- Knowledge Graph
- Linked Data
- Schema.org
- Semantic Search
apis:
- aid: google-knowledge-graph:google-knowledge-graph-entities-search-api
  name: Google Knowledge Graph Search Entities:search API
  description: The Entities:search API from Google Knowledge Graph Search — 1 operation(s) for entities:search.
  humanURL: https://developers.google.com/knowledge-graph
  baseURL: https://kgsearch.googleapis.com/v1
  tags:
  - Entities:search
  properties:
  - type: OpenAPI
    url: openapi/google-knowledge-graph-entities-search-api-openapi.yml
  - type: Documentation
    url: https://developers.google.com/knowledge-graph/reference/rest/v1
  - type: Authentication
    url: https://developers.google.com/knowledge-graph/how-tos/authorizing
  - type: GettingStarted
    url: https://developers.google.com/knowledge-graph/how-tos/search-widget
  - type: JSONSchema
    url: json-schema/Entity.json
  - type: SpectralRules
    url: rules/google-knowledge-graph-spectral-rules.yml
common:
- type: PostmanWorkspace
  url: https://www.postman.com/kinlaneapi/google-knowledge-graph-search/overview
- type: AgenticAccess
  url: agentic-access/google-knowledge-graph-agentic-access.yml
- type: VulnerabilityDisclosure
  url: security/google-knowledge-graph-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/google-knowledge-graph-domain-security.yml
- type: Authentication
  url: authentication/google-knowledge-graph-authentication.yml
- type: Portal
  url: https://developers.google.com/knowledge-graph
- type: GettingStarted
  url: https://developers.google.com/knowledge-graph/how-tos/search-widget
- type: Documentation
  url: https://developers.google.com/knowledge-graph
- type: Authentication
  url: https://developers.google.com/knowledge-graph/how-tos/authorizing
- type: TermsOfService
  url: https://developers.google.com/terms
- type: PrivacyPolicy
  url: https://policies.google.com/privacy
- type: StatusPage
  url: https://status.cloud.google.com/
- type: Support
  url: https://developers.google.com/knowledge-graph/support
- type: JSONLD
  url: json-ld/context.jsonld
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com