emerging · 0.0 capabilitymarket actiondomain

Knowledge Graph

Score 20.8 / 100 47 providers +9 via APIs 19 APIs Search apis.io →
Variants seen in the corpus: Knowledge GraphsKnowledge Graph

Providers using this tag (47)

Ranked by API Evangelist rating — Exemplar and Strong are expanded by default.

Exemplar 1 Complete, well-documented, and agent-ready
DiffbotExtractionHarvestingScrapingWeb9 APIs75.0
Strong 3 Solid coverage with minor gaps
StructifyCompanyArtificial IntelligenceDataWeb Scraping1 API64.2WikidataLinked DataOpen DataSemantic Web1 API59.6EndgameCompanySalesRevenue IntelligenceGo-To-Market2 APIs54.8
Developing 13 Usable, with meaningful gaps to close
CogneeArtificial IntelligenceMemoryRAG1 API51.9IndykiteCompanyIdentityAuthorizationAccess Control2 APIs51.3Wikipedia / MediaWikiOpen DataPublic APIsOpen KnowledgeEncyclopedia2 APIs50.4TakoCompanyArtificial IntelligenceDataSearch1 API50.0Flume HealthHealthcareHealth PlansPayersHealthcare Data2 APIs48.2ArangoDBCompanyDatabaseGraph DatabaseMulti-Model Database1 API47.2Stack ExchangeQ&ADeveloper CommunityStack Overflow17 APIs46.7NexCompanyAI AgentsContext1 API46.6YextDigital PresenceBusiness ListingsLocation DataReviews9 APIs46.3RelationalAICompanyDecision IntelligenceSemantic Layer43.9Google Knowledge Graph SearchEntitiesGoogleLinked Data1 API43.2ZepMemoryAI AgentsTemporal Graph1 API43.2Signal AICompanyMedia IntelligenceReputation ManagementRisk Intelligence1 API41.4
Thin 12 Limited public surface area
Golden RecursionCompanyData EnrichmentEntity Data1 API39.1CherreReal-EstateProperty IntelligenceData Integration1 API39.0Rainbird TechnologiesCompanyArtificial IntelligenceDecision Automation1 API38.7DoclingDocumentsParsingPDFOCR2 APIs37.9ConceptNetNLPSemantic WebCommon Sense1 API36.1ReflexivityCompanyFinancial-ServicesInvestment AnalysisMarket Data1 API33.9GoldenCompanyCompany DataData1 API33.7AdapterCompanyArtificial IntelligenceCognition1 API31.8BurstIQCompanyHealthDataBlockchain1 API31.2Eder LabsCompanyCloud SaasAI AgentsMemory1 API30.3o9 SolutionsCompanySupply ChainSupply Chain PlanningIntegrated Business Planning2 APIs28.8StardogGraph DatabaseSemantic WebSPARQL1 API26.9
Emerging 15 Early or largely undocumented
MirielCompanyArtificial IntelligenceContext EngineRetrieval7 APIs25.1AccreteCompanyArtificial IntelligenceAI Agents23.2LogseqCompanyKnowledge-ManagementNote TakingProductivity21.4CausalyCompanyArtificial IntelligenceLife SciencesBiomedical1 API21.1DBpediaLinked DataSPARQLSemantic Web6 APIs21.1DgraphGraphQLGraph DatabaseDistributed DatabaseReal-Time1 API19.0Altana AICompanyArtificial IntelligenceSupply ChainTrade Compliance18.2Synthetic SciencesCompanyArtificial IntelligenceMachine-LearningScientific Research1 API16.9RDFJSON-LDLinked DataOntology14.9SecuritiData SecurityData PrivacyAI GovernanceAI Security14.8NabooCompanyArtificial IntelligenceAI Agents14.4ExtensityCompanyArtificial IntelligenceNeuro-Symbolic AILLM13.7BlackSwan TechnologiesCompanyArtificial IntelligenceData Fabric11.8CertivityCompanyRegulatory TechnologyRegTechCompliance11.4AvantosCompanyAi MlFinancial-ServicesWealth Management11.2
Minimal 3 Almost no public developer surface
Aris MachinaCompanyArtificial IntelligenceManufacturingIndustrial5.7Hyper 4CompanyArtificial IntelligenceAI AgentsKnowledge-Management5.0Basecamp ResearchCompanyHealthcareBiotechnologyLife Sciences4.1

APIs with this tag (19)

Ranked by the provider's API Evangelist rating — the Kin Score is scored per provider, not per API, so every API of a provider shares its band. How the rating works →

Exemplar 1 Complete, well-documented, and agent-ready
Diffbot Knowledge Graph APIThe Knowledge Graph itself — a linked graph of over 10 billion entities (organizations, people, articles, p...75.0
Strong 2 Solid coverage with minor gaps
Trisotech Digital Enterprise Graph SPARQL APIA read-only SPARQL 1.1 endpoint over the Digital Enterprise Graph, the RDF projection of every model in a m...63.2Bem Knowledge Graph APIRead the cross-document knowledge graph — the canonical entities and the directed relations between them th...60.0
Developing 5 Usable, with meaningful gaps to close
Google Knowledge Graph Search APIThe Knowledge Graph Search API lets you find entities in the Google Knowledge Graph, providing access to in...48.8Flume Context MCP ServerA remote Model Context Protocol endpoint served by the Flume Console at /api/v1/context/mcp. It is protecte...48.2SAP HANA Graph Engine APIGraph processing engine for network analysis with built-in algorithms for path finding, pattern matching, a...43.9EPFL Graph SearchEPFL Graph Search is an EPFL-built knowledge-graph search over EPFL concepts, people, units and publication...42.6Events.com Knowledge Graph APIThe Knowledge Graph API from Events.com — 2 operation(s) for knowledge graph.42.0
Thin 4 Limited public surface area
Bing Entity Search APIThe Bing Entity Search API returns structured information about people, places, organizations, and other en...38.5Docling GraphTransform unstructured documents — once normalized to `DoclingDocument` — into validated, rich, queryable k...37.9ConceptNet REST APIThe ConceptNet REST API exposes the full ConceptNet 5 knowledge graph via JSON-LD endpoints. Consumers can ...36.1UniProt SPARQL EndpointA standards-compliant SPARQL 1.1 endpoint exposing the full UniProt knowledge graph as RDF. The current rel...26.2
Emerging 7 Early or largely undocumented
DBpedia Linked DataHTTP Linked Data access to DBpedia resources via content negotiation. Dereference any DBpedia entity URI (h...21.1DBpedia LiveReal-time SPARQL endpoint and Linked Data access over continuously updated DBpedia data derived from near-r...21.1DBpedia Lookup ServiceREST API for entity retrieval and auto-complete over the DBpedia knowledge graph. Resolves plain-text keywo...21.1DBpedia SPARQL EndpointPublic SPARQL 1.1 query endpoint backed by OpenLink Virtuoso over the DBpedia knowledge graph derived from ...21.1DBpedia SpotlightREST API for automatic annotation and entity linking of natural language text to DBpedia resources. Accepts...21.1Atlas REST APIThe direct HTTP API behind the Atlas CLI — the research graph, Library, runs, evidence, compute, and resear...16.9Collibra Knowledge Graph GraphQL APIThe Knowledge Graph GraphQL API enables retrieval of Collibra assets, relations, communities, domains, and ...12.5

Companies reaching this through an API (9)

These companies publish an API, specification or operation carrying “Knowledge Graph” but do not classify their business under it. Listed unranked and kept out of the count above, because one tagged operation is not a statement about what a company does.

Bem Collibra EPFL Events.com Google Microsoft Bing SAP HANA Trisotech UniProt

Score breakdown

Frequency
49.8
log-scaled weighted occurrences
Breadth
1.3
spread across providers
Quality lift
37.3
mean composite of providers using it
Cohesion
3.8
strength of nearest seed neighbor

Related tags

Semantic Web 7 co-occurrences SPARQL 7 co-occurrences Linked Data 6 co-occurrences Memory 6 co-occurrences Entities 5 co-occurrences RAG 5 co-occurrences Connectors 5 co-occurrences Query 7 co-occurrences

Where this tag comes from

Provider tag47
Api tag19
Openapi tag3
Openapi op tag6

Cohort brief

Auto-generated

The 47 providers in the APIs.io catalog tagged Knowledge Graph, scored on the Kin Score. Every figure below is computed from the catalog — nothing here is written.

Providers
47
all scored
Mean Kin Score
32.9
+8.9 vs catalog 24
Mean Agent Readiness
20.2
+7.8 vs catalog 12.4
Spread
4.1–75
median 33.7 · σ 16.7
How the 47 split by band
Exemplar 1Strong 3Developing 13Thin 12Emerging 15Minimal 3
Facet averages, against the whole catalog
FacetThis cohortCatalogDifferenceScored
Developer Ergonomics 35 23.4 +11.6 47
Contract Quality 30.5 20.1 +10.4 47
Operational Transparency 22.1 14 +8.1 47
Discoverability 67.3 61 +6.3 47
Access Clarity 31.8 26.5 +5.3 47
Contract Governance 9.2 6.5 +2.7 47

A facet is averaged over the members that carry it, not over the whole cohort — the “Scored” column is that count. Averaging an absent facet as zero would score our own coverage gaps as the providers’ posture.

What this cohort publishes
ArtifactThis cohortCatalogDifference
MCP server (any) 26% 10% +16
MCP server (first-party) 34% 13% +21
Agent Skills 0% 0% 0
OAuth scopes 19% 11% +8
Security 96% 96% 0
Arazzo workflows 6% 2% +4
Governance rules 19% 13% +6

mcp_pct counts any mcp/ artifact including ones API Evangelist derived from the provider OpenAPI; mcp_first_party_pct counts only servers the provider publishes. Prefer the latter.

Top by Kin Score
  1. 1 Diffbot 75
  2. 2 Structify 64.2
  3. 3 Wikidata 59.6
  4. 4 Endgame 54.8
  5. 5 Cognee 51.9
  6. 6 Indykite 51.3
  7. 7 Wikipedia / MediaWiki 50.4
  8. 8 Tako 50
  9. 9 Flume Health 48.2
  10. 10 ArangoDB 47.2
Top by Agent Readiness
  1. 1 Yext 54.3
  2. 2 Flume Health 51.2
  3. 3 Endgame 51.1
  4. 4 Signal AI 49.1
  5. 5 Diffbot 44.8
  6. 6 Tako 43.2
  7. 7 Golden Recursion 36.5
  8. 8 Golden 36.5
  9. 9 Structify 34.5
  10. 10 Wikipedia / MediaWiki 33.5
All 47 members of this roster resolve to a scored provider in the catalog.Generated from the catalog build of 20 September 2026, across 27620 providers, using the same computation served by the APIs.io cohort API. Briefs are published for rosters of 5 or more scored providers; below that a distribution is not meaningful.

Work with this as data

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

MCP server

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https://apis.io/mcp

Tools for tags

7 MCP tools reach this
  • find_tagsBrowse and filter every tag in the catalog.
  • get_cohortThis tag as a scored cohort — every provider carrying it, with scores.
  • cohort_statsPRO — the distribution across this tag: mean, median, band split, adoption rates.
  • cohort_rankingsPRO — the leaderboard, on composite AND agent-readiness axes.
  • 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 →

Call it yourself

curl for this page
This tag 
curl "https://apis.io/api/v1/tags/knowledge-graph"
All tags 
curl "https://apis.io/api/v1/tags?limit=25"
As a scored cohort 
curl "https://apis.io/api/v1/cohorts/tag/knowledge-graph"
The distribution (Pro) 
curl "https://apis.io/api/v1/cohorts/tag/knowledge-graph/stats" \
  -H "X-API-Key: $APIS_IO_KEY"

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