established · 1.2 capabilitymarket actiondomain

RAG

Score 26.9 / 100 94 providers 43 APIs Search apis.io →
Variants seen in the corpus: RAGRagrag

Providers using this tag (94)

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

Exemplar 2 Complete, well-documented, and agent-ready
NVIDIA NIMArtificial IntelligenceInferenceMicroservicesLLM11 APIs71.2DustAgentsArtificial IntelligenceCustom WorkflowsData Sources14 APIs67.6
Strong 10 Solid coverage with minor gaps
VendastaCompanySoftware-as-a-ServiceMarketplaceSMB38 APIs63.3CloudflareAI GatewayAPI GatewayArtificial IntelligenceCDN87 APIs62.0FactivaArtificial IntelligenceBusiness IntelligenceContent AggregationEnterprise Data11 APIs61.9CompresrLLMContext CompressionPrompt Engineering27 APIs61.4SeekrArtificial IntelligenceGenerative AIAgentsLLM35 APIs61.3Azure DatabricksAnalyticsApache SparkBig DataData Engineering39 APIs56.5Amazon BedrockArtificial IntelligenceFoundation ModelsGenerative AILLM8 APIs56.4VectaraArtificial IntelligenceAgentsCorporaEmbeddings9 APIs56.2MixedbreadArtificial IntelligenceEmbeddingsRerankingSearch14 APIs55.6PineconeVector DatabasesArtificial IntelligenceEmbeddings9 APIs54.6
Developing 35 Usable, with meaningful gaps to close
AirweaveCompanyArtificial IntelligenceSearch5 APIs53.7Auth0AI AgentsAuthenticationAuthorizationFGA76 APIs53.4EliumCompanySoftware-as-a-ServiceKnowledge-ManagementKnowledge Base2 APIs52.2LlamaParseDocument ParsingOCRPDFLLM36 APIs52.2ToolhouseAgent InfrastructureAI AgentsAI WorkersBackend-as-a-Service8 APIs52.1PixeltableCompanyAi DataMultimodal AIAI Data Infrastructure3 APIs51.3OpikLLMEvaluationObservabilityTracing39 APIs48.2CogneeArtificial IntelligenceMemoryKnowledge Graph7 APIs47.9StepFunArtificial IntelligenceLLMMulti-ModalChat Completion12 APIs47.8FlowiseAgentsAgent WorkflowsArtificial IntelligenceLarge Language Models13 APIs47.5GraviteeAPI GatewayAPI ManagementAccess ManagementIdentity55 APIs47.2ChromaArtificial IntelligenceAI-NativeApache 2.0Cloud8 APIs46.8Voyant.ioArtificial IntelligenceContext ManagementBrand GovernanceProduct Marketing3 APIs46.7NationGraphCompanySales IntelligencePublic SectorGovernment56 APIs46.4GeminiAgentsArtificial IntelligenceAudio UnderstandingBatch Processing20 APIs46.0UnstructuredDocument ProcessingETLLLM9 APIs45.7LettaArtificial IntelligenceAgentsStateful AgentsMemory41 APIs45.0Stacks AiCompanyArtificial IntelligenceAgentsLLM5 APIs44.7LanceDBVector DatabaseMulti-ModalLance FormatLakehouse16 APIs44.2DataStaxCompanyEnterpriseDatabaseVector Database17 APIs44.0AI21 LabsArtificial IntelligenceFoundation ModelsLLMJamba11 APIs43.9GistCompanyArtificial IntelligenceGenerative AIAdvertising3 APIs43.5InkeepArtificial IntelligenceSupportAgents3 APIs43.4ZeroEntropyCompanyEnterprise SaasArtificial IntelligenceSearch7 APIs43.4NucliaArtificial IntelligenceSearchKnowledge Base5 APIs42.7SeltzCompanyWeb SearchAI InfrastructureRetrieval2 APIs42.3TopkCompanySearchVector SearchHybrid Search3 APIs41.7turbopufferVector SearchFull-Text SearchHybrid SearchBM2511 APIs41.5Contextual AIArtificial IntelligenceLLMGrounded Language Model9 APIs41.4Arcee AICompanyArtificial IntelligenceMachine-LearningLarge Language Models29 APIs41.2DelphiCompanyArtificial IntelligenceAI ClonesDigital Minds8 APIs40.7TypesenseFull-Text SearchOpen-SourceSearch EnginesTypo Tolerance25 APIs40.5DoclingDocumentsParsingPDFOCR18 APIs39.8TensorlakeDocument ExtractionData ExtractionDocument IngestionDocument Parsing5 APIs39.8LinkupArtificial IntelligenceLLMWeb SearchGrounding4 APIs39.5
Thin 34 Limited public surface area
Nomic AIEmbeddingsVector DatabaseData ExplorationLLM12 APIs39.0OndemandCompanyArtificial IntelligenceMachine-Learning6 APIs38.9KineticaDatabaseAnalyticsgpu-accelerationReal-Time Analytics3 APIs38.7kapa.aiArtificial IntelligenceAnswer EngineDocumentation6 APIs38.6ChunkrDocument ParsingOCRChunking3 APIs38.4Vellum AILLM PlatformPrompt EngineeringWorkflowsEvaluations16 APIs38.2ChromaVector DatabaseVector IndexVector SearchVector Store6 APIs37.9LangflowArtificial IntelligenceAgentsWorkflowsLow-Code15 APIs37.8LlamaCloudArtificial IntelligenceDocument ParsingExtractionIndexing5 APIs37.7MendableArtificial IntelligenceAnswersEnterprise Search4 APIs37.7MyScaleVector DatabaseSQLClickHouseVector Search2 APIs37.7LangbaseArtificial IntelligenceAgentsLLM8 APIs37.5RagieArtificial IntelligenceRetrievalVector Search5 APIs37.5VectorizeArtificial IntelligenceVectorizationEmbeddings8 APIs37.4OramaSearchVector SearchOpen-Source5 APIs37.3JulepCompanyAI AgentsLLMAgents12 APIs36.9Haystack / deepsetArtificial IntelligenceLLMOpen-Source6 APIs36.5contentstack45 APIs36.3OpenLawsLegalLawStatutesRegulations5 APIs35.8SmartMindCompanyArtificial IntelligenceMachine-LearningDatabase8 APIs35.7TrieveSearchVector SearchHybrid Search21 APIs35.5MirielCompanyArtificial IntelligenceContext EngineRetrieval7 APIs35.1LucidworksSearchArtificial IntelligenceEnterprise SearchVector Search12 APIs34.2LiteLLMGateways33 APIs33.7GleanAgentsArtificial IntelligenceAnswersChat22 APIs33.5Kong AI GatewayAI GatewayLLMMCPA2A21 APIs33.5Tonic.aiSynthetic DataDe-IdentificationPrivacyUnstructured Data7 APIs33.4MastraAgentsArtificial IntelligenceJavaScript11 APIs33.2Voyage AIEmbeddingsRerankersSemantic Search9 APIs33.1Eder LabsCompanyCloud SaasAI AgentsMemory4 APIs31.6SuperlinkedVectorsEmbeddingsVector SearchRetrieval5 APIs31.1llamaindex20 APIs30.3AIMonCompanyAi MlLLM ObservabilityAI Monitoring1 API27.8KAITOArtificial IntelligenceGPUInferenceKubernetes5 APIs26.3
Emerging 9 Early or largely undocumented
Open WebUILLMOpen-SourceSelf-HostedOllama4 APIs25.8PostgresMLCompanyAi MlMachine-LearningVector Search24.1SuperduperAI FrameworkVector SearchLLMs6 APIs19.5HebbiaArtificial IntelligenceDocument AIDue DiligenceEnterprise Search2 APIs19.1EvalsEvalsLLM EvaluationAI QualityBenchmarks20 APIs15.8NabooCompanyArtificial IntelligenceAI AgentsKnowledge Graph14.4RagasLLM EvaluationRAG EvaluationRetrieval Augmented GenerationAI Evaluation1 API13.6SylloTipsCompanyArtificial IntelligenceKnowledge-ManagementEnterprise AI12.3Refact.aiArtificial IntelligenceCoding AssistantAI AgentAutonomous Agents2 APIs12.2
Minimal 4 Almost no public developer surface
OpenLLMetryArtificial IntelligenceLLMObservabilityOpen-Source6 APIs10.5RagasAI EvaluationLLMOpen-Source9.7TruEra (Snowflake)AI EvaluationObservabilityAI GovernanceLLM1 API9.7Theta EdgeCloudDistributed ComputingGPU ComputeAI ComputeAI Inference8.8

APIs with this tag (42)

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 2 Complete, well-documented, and agent-ready
NVIDIA NIM Embeddings APIOpenAI-compatible embeddings endpoint (/v1/embeddings) backed by NVIDIA NeMo Retriever text embedding model...71.2NVIDIA NIM Reranking APINeMo Retriever cross-encoder reranking endpoint (/v1/ranking) for scoring candidate passages against a quer...71.2
Strong 7 Solid coverage with minor gaps
Vendasta AI Knowledge APIThe knowledge (embeddings) API that grounds Vendasta AI Employees: upsert a knowledge source into an accoun...63.3Cloudflare AI Search APIThe Cloudflare AI Search API provides fully managed retrieval-augmented generation (RAG) pipelines. Develop...62.0Factiva Retrieval APIProvides retrieval functionality that returns licensed news articles as part of trusted data sources in a r...61.9Vector Search Indexes APIManage vector search indexes for similarity search and retrieval-augmented generation workloads.56.5Amazon Bedrock Agent APIThe Amazon Bedrock Agent API provides operations for managing and configuring autonomous AI agents, knowled...56.4Amazon Bedrock Agent Runtime APIThe Amazon Bedrock Agent Runtime API provides operations for invoking Bedrock agents and retrieving content...56.4Vectara Chat APIMulti-turn conversational interface over a Vectara corpus that maintains chat history and produces grounded...56.2
Developing 14 Usable, with meaningful gaps to close
Auth0 for AI AgentsIdentity and authorization product line for AI agents. Bundles Token Vault (delegated API credentials for G...53.4Elium MCP ServerA remote Model Context Protocol server, announced 3 June 2026, served per tenant at https://{platform}.eliu...52.2StepFun Vector Stores APIKnowledge-base (vector store) management — create/list/retrieve/delete stores and attach or remove files fo...47.8Gravitee AI Agent ManagementGravitee AI Agent Management brings the API management discipline to agentic AI ecosystems. It is delivered...47.2VoyantIO APIREST API for the Voyant brand-context platform, published as OpenAPI 3.1.0 with 783 operations over 79 tags...46.7NationGraph RAG APIThe RAG API from NationGraph — 3 operation(s) for rag.46.4Gemini Embeddings APICreate embeddings for text46.0AI21 File Library APIManaged file storage for RAG workflows. Upload, list, retrieve, update, and delete documents that Maestro a...43.9Gist Answers API (Prorata API Service)REST API behind Gist Answers. Creates chats against a publisher's licensed corpus, streams the answer back ...43.5TopK Dataset APIUnstructured document ingestion, semantic search, and grounded question answering. Upload document files (P...41.7Arcee AI RAG APIThe RAG API from Arcee AI — 9 operation(s) for rag.41.2Typesense Conversational Search APIThe Typesense Conversational Search API enables AI-powered question answering over your search index. It su...40.5Docling GraphTransform unstructured documents — once normalized to `DoclingDocument` — into validated, rich, queryable k...39.8Docling LangChain IntegrationFirst-party LangChain document loader and chunker for Docling. Drops Docling output directly into LangChain...39.8
Thin 13 Limited public surface area
Contentstack Knowledge Vault APIThe Contentstack Knowledge Vault API provides endpoints for ingesting, updating, and deleting content items...36.3Trieve Message APIMessages are turns within a topic; the Message API drives RAG completions, streaming responses, and citatio...35.5Trieve Topic APITopics persist conversational state for generative-AI chat sessions backed by a Trieve dataset.35.5LiteLLM Rag APIThe Rag API from LiteLLM — 2 operation(s) for rag.33.7LiteLLM Vector Stores APIProvides /vector_stores endpoints for creating and managing vector stores, file operations within vector st...33.7AI RAG Injector PluginAutomates retrieval-augmented generation by injecting retrieved context into prompts at the gateway, so app...33.5Glean chat APIThe chat API from Glean — 8 operation(s) for chat.33.5Tonic ValidateTonic Validate is an open-source RAG evaluation framework and metrics platform for measuring retrieval-augm...33.4Voyage AI Contextualized Embeddings APIEndpoint that embeds chunks while conditioning on surrounding document context, improving recall for long-d...33.1Voyage AI Rerank APIReranking endpoint that scores a list of candidate documents against a query and returns relevance scores. ...33.1LlamaIndex Python FrameworkLlamaIndex is an open-source Python framework for building LLM-powered applications including agents, RAG p...30.3LlamaIndex TypeScript FrameworkLlamaIndex TypeScript is the JavaScript and TypeScript implementation of the LlamaIndex framework for build...30.3KAITO RAGEngine APIRAGEngine exposes endpoints for managing retrieval-augmented generation services with embedded vector datab...26.3
Emerging 5 Early or largely undocumented
Open WebUI APIREST API exposed by a self-hosted Open WebUI instance. Endpoints cover chat completions (proxying upstream ...25.8DeepEval (Confident AI)DeepEval is an open-source LLM evaluation package, paired with Confident AI as the hosted observability/eva...15.8GalileoGalileo is an enterprise AI observability and evaluation engineering platform. The product line emphasizes ...15.8RagasRagas is an open-source evaluation library focused on retrieval-augmented generation, described in its own ...15.8Ragas Python LibraryThe Ragas Python library is the primary surface of the project, installed via `pip install ragas` and impor...13.6
Minimal 1 Almost no public developer surface
OpenLLMetry Vector Database InstrumentationsInstrumentations for vector databases used in retrieval-augmented generation pipelines — Chroma, Pinecone, ...10.5

Score breakdown

Frequency
57.1
log-scaled weighted occurrences
Breadth
2.6
spread across providers
Quality lift
47.9
mean composite of providers using it
Cohesion
15.8
strength of nearest seed neighbor

Related tags

Vector Search 23 co-occurrences Retrieval 21 co-occurrences Embeddings 23 co-occurrences Vector Database 11 co-occurrences LLM 35 co-occurrences Tools 12 co-occurrences Semantic Search 8 co-occurrences Hybrid Search 6 co-occurrences

Where this tag comes from

Provider tag74
Api tag43
Openapi tag3
Openapi op tag16

Cohort brief

Auto-generated

The 94 providers in the APIs.io catalog tagged RAG, scored on the Kin Score. Every figure below is computed from the catalog — nothing here is written.

Providers
94
all scored
Mean Kin Score
39.5
+18.8 vs catalog 20.7
Mean Agent Readiness
21.9
+12.2 vs catalog 9.7
Spread
8.8–71.2
median 39.3 · σ 13.3
How the 94 split by band
Exemplar 2Strong 10Developing 35Thin 34Emerging 9Minimal 4
Facet averages, against the whole catalog
FacetThis cohortCatalogDifferenceScored
Contract Quality 46 17.5 +28.5 94
Developer Ergonomics 37.1 17.9 +19.2 94
Operational Transparency 29.9 11.3 +18.6 94
Access Clarity 38.9 22.3 +16.6 94
Discoverability 73.4 60.4 +13 94
Contract Governance 11.4 6.4 +5 94

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) 33% 16% +17
MCP server (first-party) 13% 7% +6
Agent Skills 0% 0% 0
OAuth scopes 13% 9% +4
Security 97% 88% +9
Arazzo workflows 6% 2% +4
Governance rules 32% 13% +19

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 NVIDIA NIM 71.2
  2. 2 Dust 67.6
  3. 3 Vendasta 63.3
  4. 4 Cloudflare 62
  5. 5 Factiva 61.9
  6. 6 Compresr 61.4
  7. 7 Seekr 61.3
  8. 8 Azure Databricks 56.5
  9. 9 Amazon Bedrock 56.4
  10. 10 Vectara 56.2
Top by Agent Readiness
  1. 1 NationGraph 53
  2. 2 Cloudflare 44.5
  3. 3 Airweave 44
  4. 4 Factiva 43.3
  5. 5 Kinetica 39.4
  6. 6 Voyant.io 38.1
  7. 7 Ondemand 35.8
  8. 8 Seekr 35.8
  9. 9 Auth0 34.7
  10. 10 Vendasta 34.3
All 94 members of this roster resolve to a scored provider in the catalog.Generated from the catalog build of 25 August 2026, across 26891 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/rag"
All tags 
curl "https://apis.io/api/v1/tags?limit=25"
As a scored cohort 
curl "https://apis.io/api/v1/cohorts/tag/rag"
The distribution (Pro) 
curl "https://apis.io/api/v1/cohorts/tag/rag/stats" \
  -H "X-API-Key: $APIS_IO_KEY"

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