emerging · 0.4 capabilitymarket actiondomain

Knowledge Graph

Score 21.6 / 100 50 providers +9 via APIs 22 APIs Search apis.io →
Variants seen in the corpus: Knowledge GraphsKnowledge Graph

Providers using this tag (50)

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

Exemplar 3 Complete, well-documented, and agent-ready
DiffbotExtractionHarvestingScrapingWeb11 APIs75.4Fodda (PSFK)Market IntelligenceTrend ResearchConsumer Insights6 APIs67.6StructifyCompanyArtificial IntelligenceDataWeb Scraping1 API66.6
Strong 2 Solid coverage with minor gaps
EndgameCompanySalesRevenue IntelligenceGo-To-Market2 APIs57.5TakoCompanyArtificial IntelligenceDataSearch1 API55.2
Developing 14 Usable, with meaningful gaps to close
WikidataLinked DataOpen DataSemantic Web1 API53.6IndykiteCompanyIdentityAuthorizationAccess Control2 APIs52.6ArangoDBCompanyDatabaseGraph DatabaseMulti-Model Database1 API52.0RelationalAICompanyDecision IntelligenceSemantic Layer50.4CogneeArtificial IntelligenceMemoryRAG1 API49.5Stack ExchangeQ&ADeveloper CommunityStack Overflow17 APIs48.0PolycodeChatMemoryAgentsA2A2 APIs47.8NexCompanyAI AgentsContext1 API47.6Wikipedia / MediaWikiOpen DataPublic APIsOpen KnowledgeEncyclopedia3 APIs47.6Flume HealthHealthcareHealth PlansPayersHealthcare Data2 APIs44.2YextDigital PresenceBusiness ListingsLocation DataReviews9 APIs44.2Google Knowledge Graph SearchEntitiesGoogleLinked Data1 API43.8ZepMemoryAI AgentsTemporal Graph1 API42.5Signal AICompanyMedia IntelligenceReputation ManagementRisk Intelligence2 APIs41.3
Thin 11 Limited public surface area
DoclingDocumentsParsingPDFOCR2 APIs38.3Golden RecursionCompanyData EnrichmentEntity Data2 APIs37.9Rainbird TechnologiesCompanyArtificial IntelligenceDecision Automation1 API37.6CherreReal EstateProperty IntelligenceData Integration1 API36.7ConceptNetNLPSemantic WebCommon Sense1 API34.1AdapterCompanyArtificial IntelligenceCognition2 APIs32.8GoldenCompanyCompany DataData2 APIs32.5o9 SolutionsCompanySupply ChainSupply Chain PlanningIntegrated Business Planning2 APIs32.5ReflexivityCompanyFinancial ServicesInvestment AnalysisMarket Data1 API30.3Eder LabsCompanyCloud SaasAI AgentsMemory1 API29.3BurstIQCompanyHealthDataBlockchain2 APIs29.2
Emerging 17 Early or largely undocumented
MirielCompanyArtificial IntelligenceContext EngineRetrieval7 APIs24.8StardogGraph DatabaseSemantic WebSPARQL2 APIs24.8LogseqCompanyKnowledge ManagementNote TakingProductivity20.3DBpediaLinked DataSPARQLSemantic Web6 APIs20.2AccreteCompanyArtificial IntelligenceAI Agents20.1CausalyCompanyArtificial IntelligenceLife SciencesBiomedical1 API19.9DgraphGraphQLGraph DatabaseDistributed DatabaseReal-Time1 API16.8Altana AICompanyArtificial IntelligenceSupply ChainTrade Compliance16.7Synthetic SciencesCompanyArtificial IntelligenceMachine LearningScientific Research1 API16.6AppOrchidSemantic LayerDecision IntelligenceEnterprise AIData Fabric1 API16.1NabooCompanyArtificial IntelligenceAI Agents15.0SecuritiData SecurityPrivacyAI GovernanceAI Security13.9RDFJSON-LDLinked DataOntology12.9CertivityCompanyRegTechComplianceRegulatory Intelligence12.0ExtensityCompanyArtificial IntelligenceNeuro-Symbolic AILLM11.9Hyper 4CompanyArtificial IntelligenceAI AgentsKnowledge Management11.9AvantosCompanyAi MlFinancial ServicesWealth Management11.4
Minimal 3 Almost no public developer surface
BlackSwan TechnologiesCompanyArtificial IntelligenceData Fabric10.1Aris MachinaCompanyArtificial IntelligenceManufacturingIndustrial4.8Basecamp ResearchCompanyHealthcareBiotechnologyLife Sciences4.4

APIs with this tag (20)

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 3 Complete, well-documented, and agent-ready
Google Knowledge Graph Search APIThe Knowledge Graph Search API lets you find entities in the Google Knowledge Graph, providing access to in...77.9Diffbot Knowledge Graph APIThe Knowledge Graph itself — a linked graph of over 10 billion entities (organizations, people, articles, p...75.4Fodda MCP ServerHosted Model Context Protocol server at mcp.fodda.ai exposing 53 tools (tools-manifest.json, v1.46.79) over...67.6
Strong 2 Solid coverage with minor gaps
Bem Knowledge Graph APIRead the cross-document knowledge graph — the canonical entities and the directed relations between them th...65.8Trisotech 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...58.4
Developing 3 Usable, with meaningful gaps to close
Events.com Knowledge Graph APIThe Knowledge Graph API from Events.com — 2 operation(s) for knowledge graph.48.5SAP HANA Graph Engine APIGraph processing engine for network analysis with built-in algorithms for path finding, pattern matching, a...45.3Flume Context MCP ServerA remote Model Context Protocol endpoint served by the Flume Console at /api/v1/context/mcp. It is protecte...44.2
Thin 3 Limited public surface area
Docling GraphTransform unstructured documents — once normalized to `DoclingDocument` — into validated, rich, queryable k...38.3EPFL Graph SearchEPFL Graph Search is an EPFL-built knowledge-graph search over EPFL concepts, people, units and publication...38.2ConceptNet REST APIThe ConceptNet REST API exposes the full ConceptNet 5 knowledge graph via JSON-LD endpoints. Consumers can ...34.1
Emerging 8 Early or largely undocumented
UniProt SPARQL EndpointA standards-compliant SPARQL 1.1 endpoint exposing the full UniProt knowledge graph as RDF. The current rel...25.2DBpedia Linked DataHTTP Linked Data access to DBpedia resources via content negotiation. Dereference any DBpedia entity URI (h...20.2DBpedia LiveReal-time SPARQL endpoint and Linked Data access over continuously updated DBpedia data derived from near-r...20.2DBpedia Lookup ServiceREST API for entity retrieval and auto-complete over the DBpedia knowledge graph. Resolves plain-text keywo...20.2DBpedia SPARQL EndpointPublic SPARQL 1.1 query endpoint backed by OpenLink Virtuoso over the DBpedia knowledge graph derived from ...20.2DBpedia SpotlightREST API for automatic annotation and entity linking of natural language text to DBpedia resources. Accepts...20.2Atlas REST APIThe direct HTTP API behind the Atlas CLI — the research graph, Library, runs, evidence, compute, and resear...16.6Collibra Knowledge Graph GraphQL APIThe Knowledge Graph GraphQL API enables retrieval of Collibra assets, relations, communities, domains, and ...12.2
Minimal 1 Almost no public developer surface
Bing Entity Search APIThe Bing Entity Search API returns structured information about people, places, organizations, and other en...0.0

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
51.1
log-scaled weighted occurrences
Breadth
1.3
spread across providers
Quality lift
40.0
mean composite of providers using it
Cohesion
3.6
strength of nearest seed neighbor

Related tags

Semantic Web 7 co-occurrences SPARQL 7 co-occurrences Memory 7 co-occurrences Linked Data 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 tag50
Api tag22
Openapi tag3
Openapi op tag6

Cohort brief

Auto-generated

The 50 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
50
all scored
Mean Kin Score
32.6
+9.7 vs catalog 22.9
Mean Agent Readiness
20.7
+8.8 vs catalog 11.9
Spread
3.7–75.4
median 32.7 · σ 17.4
How the 50 split by band
Exemplar 2Strong 2Developing 15Thin 11Emerging 15Minimal 5
Facet averages, against the whole catalog
FacetThis cohortCatalogDifferenceScored
Developer Ergonomics 36.3 23.2 +13.1 50
Contract Quality 28.1 17.6 +10.5 50
Operational Transparency 22.3 13.7 +8.6 50
Discoverability 65.8 58.1 +7.7 50
Access Clarity 32.2 26.5 +5.7 50
Contract Governance 9 6.3 +2.7 50

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) 32% 14% +18
MCP server (first-party) 34% 12% +22
Agent Skills 0% 0% 0
OAuth scopes 20% 11% +9
Security 96% 98% -2
Arazzo workflows 6% 2% +4
Governance rules 18% 14% +4

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 75.4
  2. 2 Fodda (PSFK) 67.6
  3. 3 Structify 64.5
  4. 4 Endgame 57.5
  5. 5 Wikidata 53.6
  6. 6 Indykite 52.6
  7. 7 Cognee 49.5
  8. 8 Tako 49.5
  9. 9 Stack Exchange 48
  10. 10 Nex 47.6
Top by Agent Readiness
  1. 1 Fodda (PSFK) 57
  2. 2 Yext 54.3
  3. 3 Flume Health 51.2
  4. 4 Signal AI 49.1
  5. 5 Endgame 48.9
  6. 6 Diffbot 44.8
  7. 7 Tako 43.2
  8. 8 Golden Recursion 36.5
  9. 9 Golden 36.5
  10. 10 Structify 34.5
All 50 members of this roster resolve to a scored provider in the catalog.
Coverage caveat. 39 of 50 scored members had under half their catalog-attributable points satisfied at all (catalog_earned / catalog_max < 0.5). They are INCLUDED in the mean above. A large share here means the cohort mean is partly a measurement of how far our enrichment reached, not only of how these providers publish.Generated from the catalog build of 5 October 2026, across 29093 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

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

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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