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 6 Complete, well-documented, and agent-ready

Salesforce Einstein Platform Services APIThe Salesforce Einstein Platform Services API provides REST-based access to Salesforce AI capabilities incl...88.0 Amazon Connect Contact Lens APIAmazon Connect Contact Lens enables you to analyze conversations between customers and agents using speech ...79.0 OCI AI Language APIServerless cloud AI service for sophisticated text analysis at scale, including sentiment analysis, named e...70.4 Hugging Face Natural Language Processing APINLP tasks including text generation, classification, and translation69.1 Google Cloud Natural Language APIThe Cloud Natural Language API provides natural language understanding technologies including sentiment ana...68.9 Mend NLP APIThe NLP API from Mend — 1 operation(s) for nlp.67.0

Strong 3 Solid coverage with minor gaps

Azure AI Language APINatural language processing including sentiment analysis, entity recognition, and summarization.62.4 Actionpower NLP APIThe NLP API from Actionpower — 7 operation(s) for nlp.58.9 Kensho NERD APINamed-Entity Recognition and Disambiguation REST service linking text mentions to S&P Capital IQ company id...58.6

Developing 6 Usable, with meaningful gaps to close

Intelligent Tagging APIRESTful API for extracting entities, topics, and metadata from unstructured text content. Identifies organi...53.3 fatsecret Natural Language Processing APITurn a free-text meal description into matched foods and nutrition52.9 Kayhan Space NLP APIThe NLP API from Kayhan Space — 3 operation(s) for nlp.49.2 Workday Illuminate AI APIAI-powered APIs within Workday Illuminate that provide skills and sentiment analysis, document intelligence...46.6 Kensho NERDNamed Entity Recognition and Disambiguation API that identifies and links concepts in text to knowledge bas...45.4 Intelligent Tagging RESTful APINatural language processing API that identifies and tags entities such as companies, people, deals, geograp...43.3

Thin 13 Limited public surface area

AI Autocomplete APIFramework-agnostic HTTP API behind the AI Autocomplete SDKs. A single POST /api/suggest endpoint drives key...38.3 LINDAT Korektor APIPublic keyless REST API for Czech statistical spellchecking, diacritics generation and ranked correction su...35.9 LINDAT MorphoDiTa APIPublic keyless REST API for morphological analysis, morphological generation, part-of-speech tagging and to...35.9 LINDAT NameTag APIPublic keyless REST API for named-entity recognition and tokenization (NameTag 3) operated by UFAL at Charl...35.9 LINDAT UDPipe APIPublic keyless REST API for tokenization, part-of-speech tagging, lemmatization and dependency parsing of C...35.9 Cohere Classify APIThe Cohere Classify API performs text classification by assigning labels to input text based on provided ex...35.2 Cohere Detokenize APIThe Cohere Detokenize API converts a sequence of token IDs back into their corresponding text string using ...35.2 Cohere Embed APIThe Cohere Embed API generates vector embeddings from text and images, enabling semantic search, clustering...35.2 Cohere Tokenize APIThe Cohere Tokenize API splits input text into tokens using the tokenizer associated with a specified model...35.2 Bixby Developer APIThe Bixby developer platform allows developers to integrate Samsung's voice assistant into their applicatio...33.2 Papago Language Detection APIAutomatically detects the language of input text, supporting 15 languages including Korean, English, Japane...30.7 InsightEra Nlp APIThe nlp API from InsightEra — 15 operation(s) for nlp.27.0 ConceptNet REST APIThe ConceptNet REST API exposes the full ConceptNet 5 knowledge graph via JSON-LD endpoints. Consumers can ...26.2

Emerging 21 Early or largely undocumented

SYSTRAN NLP APIThe NLP API from SYSTRAN — 4 operation(s) for nlp.25.5 PMC BioC APIThe BioC API provides full text retrieval of PubMed Central Open Access articles in BioC XML or JSON format...25.0 Wit.ai HTTP APIThe Wit.ai HTTP API extracts structured meaning (intents, entities, traits) from text and audio, transcribe...22.5 Houndify Voice AI APIThe Houndify platform provides HTTP and WebSocket APIs that accept text or audio queries and return actiona...20.2 Rev AI Language Identification APIDetects the spoken language of audio input, priced at $0.003 per minute.19.9 Rev AI Sentiment Analysis APIProvides sentiment insights for transcripts, priced at $0.0008 per 10 words analyzed.19.9 Rev AI Topic Extraction APIExtracts key topics and insights from transcripts generated by the Rev AI speech-to-text pipeline.19.9 Shoonya annotation platform API (AI4Bharat, IIT Madras)A Django REST Framework API operated by AI4Bharat, IIT Madras's language-AI centre, behind the Shoonya data...18.9 IBM Watson Natural Language UnderstandingAnalyze text to extract metadata from content such as concepts, entities, keywords, categories, sentiment, ...18.5 UBIX ChatUBIX APIConversational AI API enabling natural language interaction with enterprise data and AI models. Supports it...18.0 Corporate Reputation APISemantically tags content for corporate reputation analysis, identifying entities and assigning reputationa...13.1 Deep Categorization APIPremium API that performs deep semantic text classification using advanced rule-based and machine learning ...13.1 Document Structure APIExtracts structural sections from markup documents including title, headings, abstract, and email fields su...13.1 Language Identification APIDetects the language in which a given text is written, returning ISO-639 codes and confidence scores for mu...13.1 Sentiment Analysis APIPerforms detailed multilingual sentiment analysis of texts from different sources, returning polarity, agre...13.1 Summarization APIAutomatically extracts a summary from a document by selecting the most relevant sentences, with configurabl...13.1 Text Classification APIAssigns one or more classes to a text according to content using predefined or custom taxonomy models, supp...13.1 Text Clustering APIGroups a set of texts by thematic similarity, returning clusters with titles, relevance scores, and documen...13.1 Topics Extraction APIIdentifies and extracts named entities (people, places, organizations) and abstract concepts within text, p...13.1 TorchText APINatural language processing library for PyTorch.13.1 DBpedia SpotlightREST API for automatic annotation and entity linking of natural language text to DBpedia resources. Accepts...12.7

Companies reaching this through an API (18)

These companies publish an API, specification or operation carrying “Natural Language Processing” 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.

Amazon Connect DBpedia Google Hugging Face Indian Institute of Technology Madras Kayhan Space MagicX Mend Oracle PubMed PyTorch Refinitiv Refinitiv Eikon S&P Global Salesforce Samsung UBIX Labs Workday Extend

Score breakdown

Frequency

55.8

log-scaled weighted occurrences

Breadth

1.4

spread across providers

Quality lift

27.7

mean composite of providers using it

Cohesion

0.0

strength of nearest seed neighbor

Where this tag sits

108 providers carry this tag directly, and 170 counting the 6 narrower tags below — 62 more to reach.

Artificial Intelligence broader Language Detection 9 providers Machine Translation 19 providers Natural Language Understanding 9 providers Sentiment Analysis 35 providers Text Analysis 30 providers Text Analytics 6 providers

Where this tag comes from

Provider tag108

Api tag49

Openapi tag5

Openapi op tag12

Cohort brief

Auto-generated

The 95 providers in the APIs.io catalog tagged Natural Language Processing, scored on the Kin Score. Every figure below is computed from the catalog — nothing here is written.

Providers

of 108 in the catalog

Mean Kin Score

30.2

+6.1 vs catalog 24.1

Mean Agent Readiness

17.7

+3.6 vs catalog 14.1

Spread

0–80

median 27.3 · σ 20

How the 95 split by band

Exemplar 6Strong 7Developing 16Thin 22Emerging 24Minimal 20

Facet averages, against the whole catalog

Facet	This cohort	Catalog	Difference	Scored
Contract Quality	27.8	18.6	+9.2	95
Operational Transparency	20.7	13.2	+7.5	95
Developer Ergonomics	31.9	24.5	+7.4	95
Discoverability	63	59.1	+3.9	95
Contract Governance	12.7	9.7	+3	95
Access Clarity	32.5	30	+2.5	95

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)	14%	18%	-4
MCP server (first-party)	13%	16%	-3
Agent Skills	0%	0%	0
OAuth scopes	17%	13%	+4
Security	96%	99%	-3
Arazzo workflows	2%	1%	+1
Governance rules	50%	36%	+14

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

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.

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Natural Language Processing

Providers using this tag (108)

APIs with this tag (49)