RAG
Business capabilities this tag reaches
AI Model Services 5
Variants seen in the corpus:
Retrieval Augmented GenerationRAG
Providers using this tag (106)
Ranked by API Evangelist rating — Exemplar and Strong are expanded by default.
Exemplar 3 Complete, well-documented, and agent-ready
Strong 13 Solid coverage with minor gaps
Developing 33 Usable, with meaningful gaps to close
Thin 35 Limited public surface area
Emerging 17 Early or largely undocumented
Minimal 5 Almost no public developer surface
APIs with this tag (52)
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 5 Complete, well-documented, and agent-ready
Cloudflare AI Search APIThe Cloudflare AI Search API provides fully managed retrieval-augmented generation (RAG) pipelines. Develop...Dify Chunks APIOperations for managing document chunks and child chunks. 9 operation(s) from the Dify Service API.Vector Search Indexes APIManage vector search indexes for similarity search and retrieval-augmented generation workloads.Auth0 for AI AgentsIdentity and authorization product line for AI agents. Bundles Token Vault (delegated API credentials for G...Feedly Rag APIThe Rag API from Feedly — 1 operation(s) for rag.
Strong 10 Solid coverage with minor gaps
Gravitee AI Agent ManagementGravitee AI Agent Management brings the API management discipline to agentic AI ecosystems. It is delivered...Fenergo Rag APIThe Rag API from Fenergo — 2 operation(s) for rag.Amazon Bedrock Agent APIThe Amazon Bedrock Agent API provides operations for managing and configuring autonomous AI agents, knowled...Amazon Bedrock Agent Runtime APIThe Amazon Bedrock Agent Runtime API provides operations for invoking Bedrock agents and retrieving content...huggingbay-xyz Rag APIThe Rag API from huggingbay-xyz — 1 operation(s) for rag.Atomadic Tech Rag APIThe Rag API from Atomadic Tech — 1 operation(s) for rag.Blazing Bullet Private Limited Rag APIThe rag API from Blazing Bullet Private Limited — 4 operation(s) for rag.NVIDIA NIM Embeddings APIOpenAI-compatible embeddings endpoint (/v1/embeddings) backed by NVIDIA NeMo Retriever text embedding model...NVIDIA NIM Reranking APINeMo Retriever cross-encoder reranking endpoint (/v1/ranking) for scoring candidate passages against a quer...StepFun Vector Stores APIKnowledge-base (vector store) management — create/list/retrieve/delete stores and attach or remove files fo...
Developing 16 Usable, with meaningful gaps to close
Factiva Retrieval APIProvides retrieval functionality that returns licensed news articles as part of trusted data sources in a r...LlamaCloud Index APIManaged vector index API for ingesting parsed documents into searchable LlamaCloud indexes. Supports standa...Vectara Chat APIMulti-turn conversational interface over a Vectara corpus that maintains chat history and produces grounded...Elium MCP ServerA remote Model Context Protocol server, announced 3 June 2026, served per tenant at https://{platform}.eliu...APIClaw Rag APIThe rag API from APIClaw — 4 operation(s) for rag.Arcee AI RAG APIThe RAG API from Arcee AI — 9 operation(s) for rag.AgentStack RAG APIRAG collections, documents, semantic search, and long-term memory. REST compatibility surface; for new inte...TopK Dataset APIUnstructured document ingestion, semantic search, and grounded question answering. Upload document files (P...RAGFlow HTTP APIThe RAGFlow RESTful HTTP API — 95 documented operations under /api/v1, authenticated with a tenant API key ...Voyant.io Rag APIThe Rag API from Voyant.io — 7 operation(s) for rag.NationGraph RAG APIThe RAG API from NationGraph — 3 operation(s) for rag.University of Amsterdam Rag APIThe rag API from University of Amsterdam — 4 operation(s) for rag.Divinci AI API APIRESTful API for managing AI releases, RAG knowledge bases, fine-tuning, transcripts, and more. Authenticate...AI21 File Library APIManaged file storage for RAG workflows. Upload, list, retrieve, update, and delete documents that Maestro a...Trieve Message APIMessages are turns within a topic; the Message API drives RAG completions, streaming responses, and citatio...Trieve Topic APITopics persist conversational state for generative-AI chat sessions backed by a Trieve dataset.
Thin 11 Limited public surface area
Docling GraphTransform unstructured documents — once normalized to `DoclingDocument` — into validated, rich, queryable k...Docling LangChain IntegrationFirst-party LangChain document loader and chunker for Docling. Drops Docling output directly into LangChain...AI RAG Injector PluginAutomates retrieval-augmented generation by injecting retrieved context into prompts at the gateway, so app...Émile RAG APIThe RAG API from Émile — 1 operation(s) for rag.LlamaIndex Python FrameworkLlamaIndex is an open-source Python framework for building LLM-powered applications including agents, RAG p...LlamaIndex TypeScript FrameworkLlamaIndex TypeScript is the JavaScript and TypeScript implementation of the LlamaIndex framework for build...LiteLLM Rag APIThe Rag API from LiteLLM — 2 operation(s) for rag.LiteLLM Vector Stores APIProvides /vector_stores endpoints for creating and managing vector stores, file operations within vector st...Tonic ValidateTonic Validate is an open-source RAG evaluation framework and metrics platform for measuring retrieval-augm...OpenLLMetry Vector Database InstrumentationsInstrumentations for vector databases used in retrieval-augmented generation pipelines — Chroma, Pinecone, ...Council AI MCP ServerHosted Model Context Protocol server (Streamable-HTTP) that lets Ultra-tier users invoke the Council AI mul...
Emerging 10 Early or largely undocumented
Open WebUI APIREST API exposed by a self-hosted Open WebUI instance. Endpoints cover chat completions (proxying upstream ...Glean Chat APIMulti-turn generative chat over enterprise content with grounded answers, citations, and tool use.Ragas Python LibraryThe Ragas Python library is the primary surface of the project, installed via `pip install ragas` and impor...Voyage AI Contextualized Embeddings APIEndpoint that embeds chunks while conditioning on surrounding document context, improving recall for long-d...Voyage AI Rerank APIReranking endpoint that scores a list of candidate documents against a query and returns relevance scores. ...KAITO RAGEngine APIRAGEngine exposes endpoints for managing retrieval-augmented generation services with embedded vector datab...HIVEOpen-source, local-first P2P knowledge engine for LLMs and agents; a self-hosted HIVE queen exposes an HTTP...DeepEval (Confident AI)DeepEval is an open-source LLM evaluation package, paired with Confident AI as the hosted observability/eva...GalileoGalileo is an enterprise AI observability and evaluation engineering platform. The product line emphasizes ...RagasRagas is an open-source evaluation library focused on retrieval-augmented generation, described in its own ...
Companies reaching this through an API (24)
These companies publish an API, specification or operation carrying “RAG” 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.
AgentStack
APIClaw
Arcee AI
Atomadic Tech
Auth0
Azure Databricks
Blazing Bullet Private Limited
Cloudflare
Divinci
Evals
Factiva
Feedly
Fenergo
Gravitee
huggingbay-xyz
Kong AI Gateway
LiteLLM
NationGraph
NVIDIA NIM
OpenLLMetry
StepFun
Tonic.ai
University of Amsterdam
Émile
Score breakdown
Frequency
56.8
log-scaled weighted occurrences
Breadth
1.4
spread across providers
Quality lift
38.9
mean composite of providers using it
Cohesion
11.0
strength of nearest seed neighbor
Where this tag sits
Related tags
Vector Search 31 co-occurrences
Retrieval 24 co-occurrences
Embeddings 24 co-occurrences
LLM 45 co-occurrences
Enterprise Search 8 co-occurrences
Chat Completions 14 co-occurrences
Prompts 10 co-occurrences
Where this tag comes from
Api tag51
Provider tag106
Openapi tag13
Openapi op tag44
Cohort brief
Auto-generatedThe 104 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
104
of 106 in the catalog
Mean Kin Score
39.4
+15.3 vs catalog 24.1
Mean Agent Readiness
25.7
+11.6 vs catalog 14.1
Spread
5.9–78.8
median 37.8 · σ 15.5
How the 104 split by band
Exemplar 3Strong 13Developing 33Thin 35Emerging 15Minimal 5
Facet averages, against the whole catalog
| Facet | This cohort | Catalog | Difference | Scored |
|---|---|---|---|---|
| Contract Quality | 39 | 18.6 | +20.4 | 104 |
| Developer Ergonomics | 42.7 | 24.5 | +18.2 | 104 |
| Operational Transparency | 25.2 | 13.2 | +12 | 104 |
| Access Clarity | 41.3 | 30 | +11.3 | 104 |
| Discoverability | 67.6 | 59.1 | +8.5 | 104 |
| Contract Governance | 16 | 9.7 | +6.3 | 104 |
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
| Artifact | This cohort | Catalog | Difference |
|---|---|---|---|
| MCP server (any) | 38% | 18% | +20 |
| MCP server (first-party) | 38% | 16% | +22 |
| Agent Skills | 0% | 0% | 0 |
| OAuth scopes | 13% | 13% | 0 |
| Security | 98% | 99% | -1 |
| Arazzo workflows | 2% | 1% | +1 |
| Governance rules | 76% | 36% | +40 |
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 Dify 78.8
- 2 TranscriptFetch 70.2
- 3 Dust 69.1
- 4 Nexla 66.2
- 5 WebCrawlerAPI 65.8
- 6 Seekr 65.1
- 7 Amazon Bedrock 64.3
- 8 Space Frontiers 64.1
- 9 Airia 63.6
- 10 Compresr 61.2
Top by Agent Readiness
- 1 Space Frontiers 68.9
- 2 Airweave 60.6
- 3 TranscriptFetch 56.9
- 4 LinqAlpha 55.5
- 5 Mixedbread 51.2
- 6 OpenLaws 51.1
- 7 Amazon Bedrock 48.9
- 8 Airia 48.2
- 9 Haystack / deepset 47
- 10 Pinecone 46.9
All 106 members of this roster resolve to a provider in the
catalog; 104 carry a score (98%).
The figures above describe the scored members only.
Coverage caveat. 70 of 104 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 14 November 2026, across 41591 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.
Coverage caveat. 70 of 104 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 14 November 2026, across 41591 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.