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 21 Complete, well-documented, and agent-ready

Salesforce Pub/Sub APIThe Salesforce Pub/Sub API is a gRPC-based API for publishing and subscribing to platform events, change da...88.8 Salesforce Streaming APIThe Salesforce Streaming API uses a publish-subscribe model based on Bayeux/CometD to push near-real-time e...88.8 OpenAI Realtime APIThe Realtime API from OpenAI — 9 operation(s) for realtime.84.5 Appwrite Presences APIThe Presences service allows you to track and manage real-time user presence in your project. 6 operations ...82.3 Event Notification Service APIAPI for registering callbacks and subscriptions to receive real-time event notifications from Marketing Cloud.79.1 Amazon DynamoDB Streams APIAPI for capturing and processing change data from DynamoDB tables in near real-time, providing time-ordered...78.8 Cvent Registration WebhooksCvent Webhooks deliver real-time push notifications when registration, attendee, session, and meeting reque...77.2 The Colony Realtime APIThe realtime API from The Colony — 1 operation(s) for realtime.74.8 Trello Webhooks APIThe Trello Webhooks API allows developers to receive real-time notifications when changes occur on Trello m...73.3 Umami Realtime APIThe Realtime API from Umami — 1 operation(s) for realtime.71.7 Zendesk Real-Time Chat APIThe Zendesk Real-Time Chat API provides streaming access to real-time chat metrics and activity data. It en...71.2 Qlik Cloud System EventsThe Qlik Cloud tenant event surface: 29 AsyncAPI 3.0.0 documents covering 102 message definitions across ap...71.0 Service Cloud Live Agent APIReal-time chat with customers over the Live Agent REST surface. Superseded for new builds by Messaging for ...70.4 Service Cloud Pub/Sub APIThe gRPC event API. Publish and subscribe to platform events and Change Data Capture events (including /dat...70.4 Service Cloud Streaming APICometD/Bayeux long-polling surface for PushTopic, generic streaming and platform event subscriptions. The l...70.4 Service Cloud Voice Telephony Integration APIREST API for integrating telephony systems with Service Cloud Voice, enabling programmatic management of vo...70.4 Vidyard Analytics Webhook APIThe Analytics Webhook API allows subscribing to and streaming video view data from Vidyard to an external a...69.5 Amazon API Gateway WebSocket APIBuild real-time two-way communication applications with WebSocket APIs.69.1 Adobe Analytics Data Insertion APIThe Data Insertion API allows server-side data submission to Adobe Analytics one event at a time using HTTP...67.6 Adobe Analytics Livestream APIThe Livestream API is a reporting feature in Adobe Analytics that allows clients to receive traffic data pr...67.6 Slack Events APIThe Slack Events API enables apps to respond to activities in Slack by subscribing to specific event types....66.9

Strong 50 Solid coverage with minor gaps

Tealium Moments APIA high-performance, configurable endpoint that retrieves a targeted slice of live visitor context for real-...66.1 Mux Realtime APIThe Mux Data Real-time API has been deprecated, please refer to the Mux Data `Monitoring` APIs which provid...65.9 Power BI Push Datasets APIThe Push Datasets API enables real-time data streaming by allowing applications to create push datasets and...65.9 fal Realtime APIWebSocket-based realtime inference for ultra-low latency interactive generative experiences such as LCM/SDX...65.6 Polygon WebSocket APIReal-time streaming WebSocket clusters per asset class (stocks/options/indices/forex/crypto). Subscribers a...64.9 Polygon.io Stocks APIReal-time and historical US equity market data including aggregates (minute/hour/day bars), trades, NBBO qu...64.9 Webex Realtime APIThe Realtime API from Webex — 1 operation(s) for realtime.64.1 Red5 Agent-Native SurfacePublicly hosted llms.txt providing a structured index of Red5 products, use cases, and documentation for AI...63.6 Red5 Pro Server APIREST/JSON API embedded in the Red5 Pro media server providing server info/ping/statistics, applications, st...63.6 Stream Manager 2.0 APIREST/JSON API used by both Red5 Pro clusters and Red5 Cloud for Auth, Admin, Proxy, Streams, Streams Provis...63.6 Amazon Q Connect APIAPI for Amazon Q in Connect, a generative AI-powered customer service assistant integrated with Amazon Conn...62.3 FactSet Real-Time Futures APIProvides real-time and delayed data for futures contracts, including fundamental data and key figures for g...62.0 FactSet Real-Time Options APIProvides detailed information for option contracts and option classes from global options markets, includin...62.0 Kensho Scribe Real Time APIReal-time streaming transcription over a WebSocket at wss://scribe.kensho.com/ws. Clients send an Authentic...61.3 Epsilon3 Realtime APISocketIO and webhook realtime interface for integrating third-party systems with running Epsilon3 procedure...60.3 RingCentral Presence APIThe RingCentral Presence API exposes real-time and historical presence/availability state for users and cal...59.9 ThetaData Streaming WebSocket APIJSON WebSocket streaming of US stock trade/quote, options trade/quote, and index price streams, served loca...59.9 Hookbase Realtime APIThe Realtime API from Hookbase — 4 operation(s) for realtime.59.2 Solana RPC WebSocket Subscriptions APIReal-time WebSocket subscription API for the Solana blockchain. Provides event-driven notifications for acc...58.4 MAX Exchange WebSocket APIReal-time streaming service for MAX Exchange. Public channels cover order book (book), trade, ticker, kline...58.3 Bond Webhooks APIThe Webhooks API from Bond — 2 operation(s) for webhooks.58.2 Learnosity Events APIReal-time client-side event channel used for live progress monitoring across in-flight assessment sessions.57.5 Equinor Realtime APIThe Realtime API from Equinor — 4 operation(s) for realtime.57.2 Databricks Online Tables APIThe Databricks Online Tables API allows you to create, get, and delete online tables. Online tables are mat...57.1 FlightAware FirehoseFirehose is FlightAware's real-time streaming feed of global flight data, delivering ADS-B, radar, and ATC-...56.7 Salesforce Pub/Sub APIgRPC-based API for publishing and subscribing to platform events, change data capture events, and real-time...56.6 Streaming APIPush notification API using Bayeux protocol to receive near real-time updates when data changes in Salesfor...56.6 Aviation Edge Realtime APIReal-time and historical flight tracking56.3 Blazing Bullet Private Limited Realtime APIThe realtime API from Blazing Bullet Private Limited — 6 operation(s) for realtime.56.3 Tomorrow.io Realtime APICurrent weather conditions for a point or location.56.3 Microsoft Teams Real-Time Communication APIsAPIs for building calling and meeting experiences in Teams including VoIP calls, group calls, IVR flows, an...56.2 Portkey Realtime APIWebSocket proxy for provider Realtime APIs56.1 EODHD Live (Delayed) Stock Prices APIReturns live or 15-20 minute delayed stock quotes including last price, change, volume, and bid/ask data fo...55.9 EODHD WebSockets Real-Time APIStreams real-time trade and quote updates over WebSockets for US stocks, forex, and cryptocurrencies, allow...55.9 DataHub Actions FrameworkEvent-driven framework for responding to real-time changes in the DataHub metadata graph. The Actions Frame...55.6 The Trade Desk Real-Time Conversions APIThe Trade Desk Real-Time Conversions API (formerly the Real-Time Conversion Events API) allows advertisers ...55.1 Blockdaemon Chain Watch Events APIReal-time push-based on-chain event streaming for institutional wallets and finance systems. Configure Targ...55.0 Wowza Real-Time Streaming SDKWebRTC-based SDK for delivering sub-second-latency live streams at scale through the Wowza Real-Time Stream...55.0 Wowza Realtime APIOperations related to Real-Time Streaming at Scale. If your audience is fewer than 300 viewers or you want ...55.0 GoldRush Hyperliquid WebSocket APIWebSocket channels for Hyperliquid markets including l2Book (wire-equal to the public feed), l2BookDiff (Go...54.9 Bloomberg Market Data APIProvides real-time and historical market data, including stock prices, indices, commodities, and currencies.54.8 Bloomberg Server API (SAPI)Delivers real-time market data, historical data, reference data, and calculation engine capabilities from t...54.8 Corva Data APIThe Corva Data API serves the records stored in Corva datasets — one-second operational data, engineering c...54.8 APIClaw Realtime APIThe realtime API from APIClaw — 6 operation(s) for realtime.54.6 Axway Amplify StreamsAxway Amplify Streams provides a real-time event streaming API platform enabling publishers to push data up...54.6 ClawSpan Realtime APIRealtime transport capability negotiation and stream session endpoints54.6 Decart Oasis Action-to-Video (gRPC)A gRPC session protocol for Oasis 3 Preview, Decart's promptable real-time world model. A client initialize...54.5 Decart Realtime APIThe realtime video transformation surface. A client opens a WebRTC session (LiveKit-managed transport) agai...54.5 StepFun Realtime APIBidirectional realtime voice over WebSocket (wss://api.stepfun.com/v1/realtime) with OpenAI Realtime-style ...54.4 AEMO NEM Data Dashboard APIThe JSON API behind AEMO's public National Electricity Market data dashboard, and the closest thing AEMO op...54.3

Developing 102 Usable, with meaningful gaps to close

BuiltWith Live Feed APIReal-time WebSocket feed of technology detections as they happen across the web.54.0 Adafruit IO MQTT APIMQTT broker at io.adafruit.com for publish/subscribe access to Adafruit IO feeds and groups. TLS on port 88...53.5 FAA System Wide Information ManagementThe FAA System Wide Information Management (SWIM) program is a service-oriented information sharing platfor...53.5 Gemini Live APILow-latency real-time voice and video interactions with Gemini using WebSockets for streaming multimodal in...53.5 Vertex AI Gemini Live APIEnterprise real-time multimodal streaming API on Vertex AI for building low-latency voice and video AI agents.53.5 Open Poker WebSocket Game APIWebSocket gameplay protocol (V2) at wss://openpoker.ai/ws. Client sends join_lobby, action, rebuy, leave_ta...53.2 Factiva Streams APIReal-time streaming API that delivers continuous feeds of news content matching specified criteria and filt...52.7 Trigger.dev Realtime APIThe Trigger.dev Realtime API streams live run state and typed stream data to backend and frontend clients. ...52.2 Recent Changes Event StreamThe Wikimedia Event Stream provides real-time Server-Sent Events (SSE) for Wikidata changes, revision creat...52.0 DeepL Voice APIThe DeepL Voice API provides real-time speech transcription and translation. A POST to /v3/voice/realtime i...51.8 Assembled Agent State APIRead and write real-time agent state used to drive adherence reporting, live dashboards, and dynamic routin...51.7 Hasura DDN GraphQL APIThe Hasura Data Delivery Network (DDN) is a metadata-driven API platform that generates instant GraphQL API...51.4 Hasura GraphQL APIThe Hasura GraphQL Engine v2 provides instant realtime GraphQL APIs on your data with fine-grained access c...51.4 SharePoint Webhooks APISharePoint webhooks provide a way to get notified about changes to SharePoint lists and document libraries.51.4 QFEX Market Data WebSocket (MDS)Multiplexed WebSocket gateway for all QFEX real-time market data streams: order book, trades, candles, BBO,...51.3 QFEX Trade WebSocketMultiplexed WebSocket gateway for QFEX order entry and account streams: add / modify / cancel orders, stop ...51.3 SIX Web APISingle API onto the SIX financial data universe - real-time, intraday, end-of-day, and historical pricing a...51.2 Adobe I/O EventsAdobe I/O Events provides an event-driven webhook infrastructure for subscribing to changes across Adobe se...51.1 Kaiko StreamReal-time crypto market data delivered over gRPC server-streaming. Feeds include tick-level trades, top-of-...50.9 ThingSpeak MQTT APILightweight pub/sub MQTT broker at `mqtt3.thingspeak.com` over TCP (1883), TLS (8883), WebSocket (80), and ...50.9 Tradier Streaming APIThe Tradier Streaming API delivers real-time market and account events over HTTP and WebSocket. Quote, trad...50.8 Allo-Media Stream API for HumansReal-time transcription of live human-to-human conversations over a WebSocket (Phoenix Channels). A client ...50.6 Sanity Listen APIThe Sanity Listen API provides real-time event streaming via Server-Sent Events (SSE) for content changes i...50.6 Sanity Webhooks APIThe Sanity Webhooks API enables configuring event-driven notifications for content changes. Webhooks can be...50.6 Benzinga WebSocket Streaming APIReal-time WebSocket streams over wss://api.benzinga.com for news, earnings, analyst ratings, consensus rati...50.4 INRIX Segment Speed APIReal-time, historical and predicted speed, travel time and reference speed for INRIX XD and TMC road segmen...50.2 Sportmonks Cricket APIREST API for cricket data covering 130+ leagues including IPL, international fixtures, and T20 competitions...50.2 Sportmonks Motorsport APIREST API for motorsport data including Formula 1 race results, qualifying, driver and constructor standings...50.2 Amperity Streaming APILow-latency, high-throughput REST API for real-time ingestion of event data from external systems into Ampe...50.0 Azure Maps Traffic APIProvides real-time and historical traffic data including traffic flow, incident reports, and traffic tile i...49.9 Binance.US WebSocket APIThe Binance.US WebSocket API is a request/response API delivered over a persistent WebSocket connection at ...49.9 Binance.US WebSocket StreamsBinance.US WebSocket Streams deliver real-time market data and account events over persistent WebSocket con...49.9 Pagar.me Webhooks APISubscribe to and receive signed webhook events for every meaningful state change on Pagar.me — order.paid, ...49.6 Storyblok WebhooksStoryblok emits webhook events when content actions occur in a space such as story publication, unpublicati...49.6 Aptos Transaction Stream APIgRPC streaming API that delivers historical and real-time transaction data from the Aptos blockchain. Used ...49.5 Blockchain.com WebSocket APIsReal-time WebSocket APIs covering two distinct surfaces — the Bitcoin / blockchain.info explorer socket (un...49.4 Deutsche Börse Cloud Stream Market Data APICloud-delivered real-time market data streaming over WebSocket (host md.deutsche-boerse.com) with Protocol ...49.4 MISO Realtime APIThe Realtime API from MISO — 17 operation(s) for realtime.49.3 Bloomberg Data APIProvides programmatic access to Bloomberg's financial market data including real-time and historical pricin...49.0 ZillaBaseZillaBase is an event-driven backend framework for the next generation of web, mobile, and AI applications,...48.6 LSEG WebSocket APIStandards-based WebSocket API for real-time pricing streaming using JSON message formats. Connects to Real-...48.3 Real-Time C# SDKC# SDK providing the Enterprise Transport API (ETA) for building high-performance real-time data applicatio...48.3 Real-Time C/C++ SDKC and C++ SDK providing the Enterprise Message API (EMA) and Enterprise Transport API (ETA) for ultra-low-l...48.3 Real-Time Java SDKJava SDK encompassing the Enterprise Message API (EMA) and Enterprise Transport API (ETA) for building high...48.3 World-Check Verify APICloud-native, stateless screening API purpose-built for real-time, low-latency screening of individuals and...48.3 Amazon Managed Service for Apache Flink APIAmazon Managed Service for Apache Flink (formerly Amazon Kinesis Data Analytics for Apache Flink) is a full...47.7 AutoCAD Webhooks APIAPI enabling applications to listen for and receive notifications when specific events occur in AutoCAD dat...47.7 SSEN NeRDA (Near Real-time Data Access) APINear real-time power flow data from SSEN Distribution's EHV, HV and LV networks, drawn from SCADA PowerOn, ...47.7 SSEN Power Track Real Time Outage APIAnonymous JSON API behind the SSEN Power Track map, returning planned and unplanned outages on the SSEN Dis...47.7 LLM Gateway Realtime APIThe Realtime API from LLM Gateway — 1 operation(s) for realtime.47.6 IESO Dispatch Service Web ServiceA web service, specified in SPEC-154, through which registered market participants retrieve dispatch instru...46.8 Algebras AI Inc. Realtime APIThe Realtime API from Algebras AI Inc. — 11 operation(s) for realtime.46.7 Discord Gateway APIThe Discord Gateway API provides persistent, stateful WebSocket connections between your client and Discord...46.7 Discord Voice APIThe Discord Voice API provides the protocol for establishing and managing voice connections between clients...46.7 Ando Realtime APIThe Realtime API from Ando — 1 operation(s) for realtime.46.6 Happyrobot Realtime APIThe Realtime API from Happyrobot — 1 operation(s) for realtime.46.2 Reactor Realtime Video APIReal-time generative video platform. A REST token endpoint mints session-scoped JWTs; a WebRTC data channel...46.0 Airbnb Webhooks APIThe Airbnb Webhooks API enables connectivity partners to receive real-time notifications when events occur ...45.8 Juniper Mist WebSocket Streaming APIMist exposes a WebSocket channel for real-time event subscriptions including device events, location update...45.8 Highrise Bot APIWebSocket API for building and running programmable bots inside Highrise rooms. Bots receive a stream of ro...45.7 Aramark Realtime APIGet POS Real Time Data45.5 Southwest Power Pool Realtime APIIf permitted by the Clearinghouse Provider, its Ratings Providers can use these functions to exchange real-...45.2 Convex Sync ProtocolThe Convex Sync Protocol is the bidirectional WebSocket protocol spoken between Convex client SDKs and the ...44.8 FX Market Data - NDF Matching APIPoint-to-point market data service based on FIX SBE technology, allowing trading participants to receive re...44.8 Refinitiv Real-Time SDK - C/C++Open source C/C++ SDK for the Refinitiv Real-Time platform, providing the Enterprise Message API (EMA) and ...44.8 Refinitiv Real-Time SDK - JavaOpen source Java SDK for the Refinitiv Real-Time platform, containing the Enterprise Message API (EMA) for ...44.8 Refinitiv Real-Time WebSocket APILow-latency streaming API for real-time market data using WebSocket connections. It supports the Open Messa...44.8 Chartbeat Real-Time APILive audience and traffic data updated every three seconds — top pages, referrers, geographies, engaged tim...44.5 Morningstar Market Data Web Services APIOn-demand access to Morningstar's financial market data over HTTP in XML and JSON - real-time, delayed, and...44.5 Morningstar Snapshot APIOn-demand Level 1 market data snapshots over HTTPS with OAuth 2.0, documented publicly through Morningstar'...44.5 Morningstar Streaming APIWebSocket-based real-time market data streaming with Level 1 quote and Level 2 market-by-price subscription...44.5 Indeed Real-time APIStream real-time server-sent events (SSE) to enable front-end applications to update instantly, supporting ...44.4 Deepgram Voice Agent APIThe Deepgram Voice Agent API is an end-to-end solution that combines speech-to-text, LLM orchestration, and...44.3 Opoint SafeFeed APIPull feed of real-time global news data at feed.opoint.com/safefeed.php, advanced with a lastid cursor take...44.2 Result BackendHosted application backend consumed through the first-party @resultdev/sdk client and administered with @re...43.9 Amberdata WebSocket Streaming APILow-latency real-time WebSocket streaming over a JSON-RPC 2.0 subscribe interface for spot trades and price...43.6 Weidmüller Realtime APIAPI for u-OS realtime settings43.6 TROLIE Realtime APIIf permitted by the Clearinghouse Provider, its Ratings Providers can use these functions to exchange real-...43.5 Thinkific Webhooks APIThe Thinkific Webhooks API (v2) provides real-time event-driven notifications for site events including use...43.2 Supabase Realtime APIThe Supabase Realtime API provides WebSocket-based subscriptions for real-time data changes from PostgreSQL...42.8 Gladia Live (Real-time) APIWebSocket API for real-time live audio transcription with sub-second latency, supporting multi-language det...42.5 TomTom Parking Availability APIThe TomTom Parking Availability API provides real-time availability status of parking sites and on-street p...42.5 dxFeed dxLink WebSocket APIdxLink is dxFeed's WebSocket protocol for real-time market data streaming with multiplexed virtual channels...42.3 Magic Bus (U-M Transit) BusTime APIReal-time campus transit API for U-M's Magic Bus service, served from a U-M host on Clever Devices BusTime....42.3 University of Amsterdam Realtime APIThe realtime API from University of Amsterdam — 6 operation(s) for realtime.42.3 Spring WebFlux WebSocketReactive WebSocket support for full-duplex, bidirectional communication in WebFlux applications. Provides W...42.2 Tensor WebSocket APISubscription-based realtime stream of Tensor marketplace events. Channels include `newTransaction` (every c...42.0 Celigo integrator.io Webhook ListenersInbound webhook listeners exposed by integrator.io. Each listener provides an auto-generated public HTTPS U...41.8 Space Weather Prediction Center (SWPC) Data ServiceSWPC publishes solar wind, geomagnetic, X-ray flux, aurora forecast, radiation storm, and coronal mass ejec...40.9 Temenos Operational Data Store APIsAPIs built on the near real-time Operational Data Store from Temenos Transact Data Hub, presenting data in ...40.9 Ally Invest Streaming Market Data APIThe Ally Invest Streaming API delivers real-time market quotes via a persistent HTTP streaming connection. ...40.8 CoreStory Realtime APIThe realtime API from CoreStory — 1 operation(s) for realtime.40.7 Jupyter Kernel Messaging ProtocolWebSocket-based messaging protocol for communication between Jupyter clients and computational kernels. Sup...40.6 OpenSea Stream APIReal-time WebSocket event streaming for NFT marketplace activity per collection, including item listed, ite...40.5 Real-Time Futures and Options Data APIReal-time market data API delivering futures and options price, volume, and open-interest information acros...40.5 Arcadia Signal APIArcadia Signal provides utility tariff and energy rate data and calculations for use in cost-benefit analys...40.4 Nasdaq Cloud Data Service (NCDS) REST APIRequest-based REST API for real-time and delayed Nasdaq, BX, PSX and CQT equities (last sale, last trade, l...40.4 Webex Meeting Participants APIList and update participants in active or completed Webex meetings. Supports admin-mute, lobby admit, and p...40.3 tastytrade Account Streamer APIWebSocket-based account streaming that delivers real-time notifications for order fills, position changes, ...40.2 tastytrade DXLink Market Data Streaming APIReal-time market data streaming via DXLink, a WebSocket-based protocol backed by dxFeed. Clients fetch a qu...40.2 Tidio WebhooksReal-time event notifications delivered via HTTP POST to a configured endpoint. Webhooks are available excl...39.9 Tavus APIThe Tavus REST API powers personalized video generation and real-time Conversational Video Interface sessio...39.5

Thin 120 Limited public surface area

Binance Spot WebSocket APIThe Binance Spot WebSocket API provides an alternative way to access spot trading functionality through per...39.1 Binance Spot WebSocket StreamsBinance Spot WebSocket Streams deliver real-time market data updates via persistent WebSocket connections. ...39.1 Oddpool WebSocket FeedsSingle-connection WebSocket streaming real-time, normalized cross-venue prediction market data (dist, book,...39.1 Survicate WebhooksSurvicate Webhooks enable real-time event-driven integrations by subscribing to events triggered by Survica...39.0 Wazo Websocket Event Stream (wazo-websocketd)WebSocket gateway onto the Wazo internal event bus. An authenticated client subscribes to named platform ev...38.9 TradeStation Streaming APIThe TradeStation Streaming API provides real-time HTTP streaming endpoints using chunked transfer encoding ...38.8 B3 Market Data Feed (UMDF)B3's real-time market data distribution over the Unified Market Data Feed (UMDF) - event-based bid, ask, tr...38.7 Live Flights FullReturns complete real-time aircraft flight movement records including latitude, longitude, speed, altitude,...38.6 Live Flights LightReturns a lightweight snapshot of real-time aircraft positions worldwide, including latitude, longitude, al...38.6 Tock Real-time Guest Profile WebhookReal-time webhook that delivers guest-profile updates for all locations within a Tock business group to a p...38.6 Tock Real-time Reservation WebhookReal-time webhook that delivers reservation updates for all locations within a Tock business group to a par...38.6 Xignite CloudStreaming APIStreaming product for pushing real-time quotes directly to applications. The product page is live but trans...38.6 Xignite Global Real-Time APIReal-time stock quote data for global equities via REST request/response operations on the globalrealtime.x...38.6 Montran Instant Payments SystemA robust 24/7, high-capacity, retail-focused payment solution that processes individual payments in real-ti...38.4 Montran Intraday Liquidity ManagementAn enterprise-level system delivering real-time liquidity management with live monitoring, an intuitive use...38.4 Deribit WebSocket APIJSON-RPC over WebSocket interface for real-time bidirectional communication with the Deribit exchange. Reco...38.2 Voiceitt WebSockets APISocket.IO WebSockets API for real-time speech recognition. After JWT login via the HTTP API, clients set re...38.1 Cartesia STT WebSocket APIRealtime transcription over WebSocket at wss://api.cartesia.ai/stt/websocket. Clients stream raw binary aud...37.9 Cartesia TTS WebSocket APIBidirectional, multiplexed WebSocket at wss://api.cartesia.ai/tts/websocket for realtime speech generation....37.9 SpacetimeDB HTTP APIThe SpacetimeDB HTTP API lets clients and tools interact with SpacetimeDB databases: publish and delete dat...37.9 Nhost GraphQL APIInstant, real-time GraphQL API auto-generated from PostgreSQL database schemas via Hasura. Supports queries...37.8 USGS Instantaneous Values ServiceProvides near real-time water data — streamflow, gage height, temperature, specific conductance, and hundre...37.4 Mattermost WebSocket APIReal-time WebSocket event stream for Mattermost v4. Clients connect to /api/v4/websocket, authenticate via ...37.2 AT Protocol Firehose (Event Stream)Public WebSocket event stream providing real-time access to all public activity on the AT Protocol network,...36.7 Apache Spark Streaming APIScalable, high-throughput, fault-tolerant stream processing of live data streams. Supports Structured Strea...36.6 Nasdaq Data Link REST API for Real-Time or Delayed DataREST API (Nasdaq Cloud Data Service) for real-time or delayed exchange data — Nasdaq Basic, Last Sale+, BBO...36.6 Nasdaq Data Link Streaming APIStreaming API (Nasdaq Cloud Data Service) for real-time products — Nasdaq Basic, Last Sale+, TotalView, Con...36.6 Fonoa Webhooks APIWebhooks management API for configuring real-time event notifications from Fonoa's platform. Recommended ov...36.4 Syndica ChainStream APIChainStream is Syndica's real-time Solana data streaming API. It consolidates updates from multiple validat...36.4 Bud Ecosystem APIBud Ecosystem API as documented publicly: 31 operations. Contract generated from the documentation by API E...36.3 Sportradar NBA APIProvides comprehensive NBA data including real-time play-by-play, box scores, standings, team and player st...36.0 Sportradar NFL APIDelivers detailed NFL data including game summaries, play-by-play, drive charts, team and player statistics...36.0 Sportradar Soccer APICovers 500+ soccer competitions globally, providing live match data, match timelines, team and player stati...36.0 Enterprise Event SystemReal-time, pub/sub-based event streaming surface. Lets institutions and partners react to events emitted ac...35.7 Neuphonic TTS WebSocket APIWebSocket endpoint for continuous, low-latency text-to-speech streaming. Enables real-time voice synthesis ...35.6 PTC ThingWorx WebSocket/AlwaysOn APIPTC ThingWorx AlwaysOn WebSocket API enables persistent bidirectional connections for industrial edge devic...35.6 Nasdaq Cloud Data Service (NCDS) Streaming APINasdaq Cloud Data Service (NCDS) provides streaming and REST APIs for real-time and delayed market data del...35.5 TheSports Basketball APIReal-time basketball data feeds including NBA, EuroLeague, and other major leagues. Covers teams, players, ...35.5 LMNT Speech Sessions APIWebSocket-based real-time speech generation API for streaming LLM text output to synthesized audio with res...35.2 zkSync Era WebSocketWebSocket variant of the zkSync Era JSON-RPC endpoint for real-time eth_* subscriptions (newHeads, logs, pe...35.2 Restream Chat APIWebSocket API for accessing and managing Restream Chat. Receive real-time chat messages from all connected ...35.0 Restream Streaming Updates APIWebSocket API for real-time streaming status updates. Connect to wss://streaming.api.restream.io/ws with an...35.0 Allmodels Realtime APIThe Realtime API from Allmodels — 1 operation(s) for realtime.34.9 Bloomberg Data APIThe Bloomberg Open API (BLPAPI) provides programmatic access to Bloomberg's market data, reference data, hi...34.7 Bloomberg Market Data FeedReal-time and historical market data for equities, fixed income, commodities, and currencies.34.6 CTA Customer Alerts APIThe Customer Alerts API delivers real-time service status, planned outages, and disruption information for ...34.5 Sense Realtime APIThe Sense Realtime API delivers live electricity usage data via a WebSocket connection, streaming second-by...34.4 CometChat Realtime & Client SDKClient SDKs (JavaScript, React, React Native, Android, iOS, Flutter, Ionic) connect over a managed WebSocke...33.9 CyberSource Webhooks APIEvent-driven notification system that delivers real-time alerts for payment events, fraud decisions, and sy...33.8 Courier Inbox Real-Time APIWebSocket service that delivers Inbox messages and message-state events (read, unread, opened, archived, cl...33.4 Bloomberg Market Data APIProvides access to real-time and historical market data including stocks, bonds, commodities, and currencie...33.3 Urban Sky SDK (Real-time Balloon Telemetry)Real-time balloon telemetry feed delivered over WebSocket via the Urban Sky SDK (JavaScript and Python, dis...33.3 Trint Realtime APILive/realtime transcription via an RTMP media stream.33.2 Zulip Events APIThe Zulip Events API delivers real-time updates from a Zulip server to a client via an HTTPS long-poll. Cli...33.2 MEXC Futures WebSocket APIThe MEXC Futures WebSocket API streams real-time derivatives market data and account events over persistent...33.1 MEXC Spot WebSocket StreamsThe MEXC Spot WebSocket Streams deliver real-time market data and user account updates via persistent WebSo...33.1 United Airlines Flight Status APIUnited Airlines Flight Status API providing real-time flight status including estimated and actual departur...33.1 Nakama Realtime Socket APIPersistent WebSocket connection carrying realtime features - status presence, realtime chat channels, relay...32.9 LBank WebSocket Account and Order APIAuthenticated WebSocket API for receiving real-time account balance and order status updates from LBank. Cl...32.8 LBank WebSocket Market Data APIReal-time WebSocket API for streaming live market data from LBank. Clients can subscribe to K-line (candles...32.8 Sitecore CDP Stream APIThe Sitecore CDP Stream API enables applications to send real-time behavioral and transactional events abou...32.8 Bird Realtime APIReal-time feeds with 60-second TTL32.6 LiteLLM Realtime APIProvides /realtime WebSocket endpoints for real-time model interactions with load balancing and guardrails ...32.5 Atlan Webhooks APIReal-time event webhooks that capture and deliver notifications when metadata changes occur within the Atla...32.4 Trading Economics Streaming APIPersistent WebSocket connection at wss://stream.tradingeconomics.com delivering live market quote ticks by ...32.4 Dune Echo (Sim) Multichain APIReal-time multichain wallet, token, and transaction data across EVM and SVM chains via Sim by Dune.32.2 Companies House Streaming APIThe Companies House Streaming API delivers real-time changes to Companies House data via long-running HTTP ...32.1 SpotHero SpotNow APISpotNow is SpotHero's server and API built in Kotlin for real-time parking availability and instant booking...32.1 Formant Data SDK (JavaScript / TypeScript)Browser- and Node-side JavaScript / TypeScript SDK for building custom modules, custom views, and embedded ...31.8 Upbit WebSocket APIThe Upbit WebSocket API delivers real-time streaming data for market and account events. Public streams inc...31.7 Hyperliquid WebSocket APIReal-time WebSocket feed delivering order-book deltas, trades, candles, BBO, user fills, user funding, user...31.3 InstantDB Realtime Sync APIThe realtime sync transport - a persistent WebSocket at wss://api.instantdb.com/runtime/session over which ...31.1 Hydromancer REST APIHyperliquid data REST API using a single POST /info operation dispatcher (type field selects the operation)...30.8 Hydromancer WebSocket APIReal-time WebSocket streams for Hypercore events, orderbooks (L2/L4), trades, and account updates. API key ...30.8 Papercups Realtime Chat API (WebSocket / Phoenix Channels)Bidirectional realtime live chat over Phoenix WebSocket channels. Clients join conversation, conversation-l...30.8 Adobe Commerce WebhooksAdobe Commerce Webhooks enable developers to configure synchronous HTTP callbacks that fire when specific e...30.6 SuperViz Realtime APIPublishing events into realtime channels from a backend.30.6 Airlabs Real-Time Flights APITrack live aircraft positions worldwide with latitude, longitude, altitude, speed, direction, and flight id...30.5 Triplit Client SDKTypeScript/JavaScript client library for interacting with Triplit databases locally and remotely. Provides ...30.5 Triplit HTTP APIRESTful HTTP API for interacting with a Triplit sync server, supporting fetch, insert, bulk-insert, update,...30.5 Agora Signaling API (RTM)The Agora Signaling API (formerly Real-Time Messaging / RTM) provides real-time low-latency synchronization...30.3 Bitstamp WebSocket APIReal-time WebSocket API providing live market data streams including order book updates, live trades, ticke...30.3 HKEX Orion Market Data Platform - Derivatives Market (OMD-D)Real-time datafeeds (OMD-D DS, DP, DF tiers) for futures and options traded on the Hong Kong Futures Exchan...30.3 HKEX Orion Market Data Platform - Securities Market (OMD-C)Real-time datafeeds (OMD-C SS, SP, SF tiers) for all securities traded on the Stock Exchange of Hong Kong, ...30.3 Circle Realtime WebSocket APIBeta ActionCable (Rails) WebSocket surface for realtime chat and notifications, connected at wss://app.circ...30.1 Pushbullet Realtime Event StreamSecure WebSocket stream that delivers realtime events to a Pushbullet account, including periodic `nop` kee...30.0 Betfair Exchange Stream APILow-latency, subscription-based push of market and order changes over a persistent raw SSL/TCP socket to st...29.9 SEC API Filing Stream APIReal-time, push-based WebSocket feed of newly published SEC EDGAR filings. Connect to wss://stream.sec-api....29.8 Bloomberg B-PIPEReal-time streaming market data feed providing access to 35 million instruments across all asset classes, a...29.7 Inworld AI Realtime APIRealtime speech-to-speech29.7 Inworld Realtime APILow-latency speech-to-speech voice API for natural conversation experiences. Included with all plans.29.7 WIS2 Global Broker (MQTT)The WIS2 Global Broker provides an MQTT(S) publish-subscribe service that re-publishes real-time weather no...29.7 Streamlabs APIREST API to access a user's Streamlabs account: donations, custom alerts, loyalty points, media share, aler...29.4 Quix Streaming Reader API (Real-time)Subscribe to live parameter data, events, definitions, active streams, topic metrics, and raw packages from...29.3 WazirX WebSocket APIEndpoints for WebSocket authentication token generation29.3 eToro Market Data APIProvides REST and WebSocket access to real-time and historical market data for all asset classes available ...29.1 Euronext Web Services Market Data APIOn-demand real-time, delayed, and reference market data over HTTP in JSON (REST) covering equities, fixed i...29.0 ColorfulClouds Realtime APIReal-time weather conditions at the requested location.28.8 Exotel AgentStream Voice Streaming APIDocumented WebSocket (wss://) voice-streaming API. When a call reaches a Voicebot or Stream applet, Exotel ...28.8 BMW CarData Streaming APIThe BMW CarData Streaming API delivers near-real-time vehicle telematics over MQTT 3.1.1 with TLS. Clients ...28.7 Dataminr Pulse APIOAuth2-secured REST API for consuming Dataminr real-time alerts and managing watchlists/lists. Token flow a...28.7 Bloomberg B-PIPE APIReal-time streaming market data API delivering quotes, trades, and market depth.28.6 Bloomberg Data License APIProvides access to Bloomberg's extensive financial data including real-time quotes, historical data, refere...28.6 TzKT WebSocket APIThe TzKT WebSocket API uses SignalR to deliver real-time push notifications to subscribed clients. Channels...28.3 Tekion WebhooksServer-to-endpoint webhooks that keep partner systems in sync as dealership data changes across sales, serv...28.2 DigiSelf Realtime APIREST + WebSocket API for driving real-time photorealistic AI avatars. Create meeting bots that join Google ...28.0 You.com Search APIThe You.com Search API returns real-time web search results tailored for AI agents and LLMs, with controls ...27.8 Layercode Realtime Voice APIBidirectional realtime WebSocket transport that streams base64 PCM microphone audio from the browser to Lay...27.7 Blynk Device Streaming ProtocolBi-directional low-latency streaming connection protocol used by the Blynk Library and Blynk.Edgent to main...27.5 Pushover Open Client APIReal-time client API for Pushover. Combines a WebSocket channel at wss://client.pushover.net/push that stre...27.5 XRPL WebSocket API (Mainnet)WebSocket interface to the XRP Ledger mainnet supporting all JSON-RPC methods plus real-time subscriptions ...27.5 Ola Ride Tracking APIThe Ola Ride Tracking API provides real-time location data for booked rides, including driver position, ETA...27.4 Transports (WebRTC/WebSocket)Realtime media transport layer of the framework. Bidirectional audio, video, and data flow over Daily WebRT...27.3 Crisp Realtime (Webhooks + RTM) v1Crisp realtime surface combining HTTP Web Hooks (signed plugin hooks and unsigned website hooks) and the So...27.1 CoWorkr Stream APICoWorkr's real-time Stream API. Built on Node.js and DDP (the Meteor Distributed Data Protocol), it pushes ...26.8 Gate WebSocket API v4Real-time WebSocket streams for market data (order books, trades, tickers, candlesticks) and private channe...26.5 Rime TTS APIRealtime text-to-speech API supporting streaming HTTP, WebSocket, and SSE delivery for Arcana and Mist mode...26.4 VATSIM Slurper APIProvides real-time connection information for individual VATSIM users, delivering live session data for a g...26.3 Bitquery Streaming SubscriptionsGraphQL subscriptions over WebSocket for real-time blockchain data - live DEX trades, transfers, pending tr...26.2 DEXrabbitReal-time DEX analytics product built on Bitquery's data - tracks trades, liquidity, volumes, and trending ...26.2

Emerging 53 Early or largely undocumented

Bithumb WebSocket APIReal-time WebSocket API for streaming market data including tickers, order books, and trade executions, as ...26.1 DEGIRO Quotecast APIReal-time market data streaming service providing live ticker subscriptions for price, volume, bid/ask, and...26.1 Moovit RealTime APILive arrival predictions for stops and lines.26.1 Photon Realtime Transport ProtocolThe core Photon protocol - NOT a REST or JSON API. Clients connect through a Name Server to a Master Server...25.5 Vocode Realtime Streaming ConversationReal-time, bidirectional streaming conversation pipeline (StreamingConversation) in the open-source library...25.3 Cornerstone WebhooksSubscribe to near real-time HTTP event notifications for critical Cornerstone business events including lea...24.9 Whop Realtime WebSocket APIBidirectional realtime WebSocket for Whop apps - custom app messages and chat/feed updates - connected and ...24.9 HealthVerity Identity APIGated, enterprise real-time de-identification API named on the HealthVerity Identity Manager product page. ...24.5 Bitget WebSocket APIReal-time WebSocket API providing public and private channels for market data (tickers, candles, order book...24.3 Pendle Real-Time Feeds (Socket.IO)Real-time data feeds delivered over Socket.IO from `https://api-v2.pendle.finance/pendle-v2`. Clients conne...24.3 Aevo Exchange WebSocket APIReal-time WebSocket API for Aevo exchange providing low-latency streams for orderbook updates, trade feeds,...24.2 Directus GraphQL APIAuto-generated GraphQL API that mirrors the REST API surface, providing strongly-typed queries and mutation...23.7 Monta WebhooksSigned webhook payloads deliver real-time platform events without polling, covering charge transactions, OC...23.7 Litecoin Space WebSocket APIA real-time WebSocket API provided by Litecoin Space (litecoinspace.org) for subscribing to live Litecoin n...23.6 Respeecher Space Real-Time TTS APILow-latency real-time text-to-speech that begins streaming audio in under 200ms via three transports - one-...23.6 Userpilot Realtime APIThe Realtime API from Userpilot — 2 operation(s) for realtime.23.5 People in Space Right NowReturns a JSON object containing the total count of humans currently in space and an array of crew member o...23.3 Spline Real-time Variables and Data APIReal-time API for binding variables and data into live Spline scenes.22.7 HPE Aruba Networking Central Streaming APIThe Central Streaming API delivers real-time telemetry and event streams (location, presence, AppRF, audit,...22.4 CoinEx WebSocket API v2 - FuturesReal-time WebSocket API for CoinEx futures and perpetual contract markets. Supports streaming subscriptions...22.3 CoinEx WebSocket API v2 - SpotReal-time WebSocket API for CoinEx spot markets. Supports streaming subscriptions for market depth, trade f...22.3 MSCI Real Time Index APIReal-time index and factor data API delivering intraday index levels for MSCI indexes.21.7 Synthetix WebSocket Info APIPublic WebSocket API for real-time Synthetix market data subscriptions including live market prices, candle...21.6 Synthetix WebSocket Trade APIAuthenticated WebSocket API for real-time trading operations and account event streaming on Synthetix. Supp...21.6 Garmin Health SDKMobile SDKs for iOS and Android that pair directly with Garmin wearables over BLE and stream raw real-time ...21.4 Taddy Webhooks APIReal-time webhook notifications for new and updated content, delivering events such as podcast.created, pod...21.3 Rev AI Streaming Speech-to-Text APIReal-time speech transcription via WebSocket connections supporting up to 10 concurrent streams with a 3-ho...21.0 Southwest Airlines In-Flight Network APIThe Southwest Airlines in-flight network provides a JSON API available at getconnected.southwestwifi.com/cu...20.4 ABB Robot Web Services SubscriptionsWebSocket-based subscription service that pushes change events for subscribed RWS resources (IO signals, RA...20.0 PowerSync Sync Service APIThe PowerSync Service exposes a streaming sync protocol over HTTP/WebSocket that client SDKs connect to usi...19.8 Lyra WebSocket APIWebSocket API for real-time streaming of market data, order book updates, ticker subscriptions, and private...19.6 Vagaro WebhooksOutbound event notifications - HTTP POST requests to a merchant- registered HTTPS endpoint, not a WebSocket...19.2 BitMart Futures WebSocket APIThe BitMart Futures WebSocket API streams real-time derivatives market data and account updates through per...19.1 BitMart Spot WebSocket APIThe BitMart Spot WebSocket API delivers real-time streaming market data and private account updates via per...19.1 Electrify America Availability APIReal-time charger availability API that returns live connector status (available, in-use, faulted, offline)...19.1 Nitric Websocket ResourceSDK resource for declaring realtime bidirectional websocket endpoints with connect, disconnect, and message...18.7 SaskPower Live Outage JSON FeedThe undocumented JSON endpoint behind SaskPower's public outage map, found in the markup of the Outage Map ...18.0 PySpark StreamingReal-time stream processing capabilities using DStreams and Structured Streaming.17.8 CoinDCX Streaming Socket.IO APIReal-time Socket.IO streaming at stream.coindcx.com for public spot and futures market data (orderbook dept...17.7 PocketBase Realtime APIServer-Sent Events (SSE) based real-time subscriptions for create, update, and delete record events across ...17.4 Uber Freight Real-Time Tracking APIProvides real-time shipment visibility from pickup through delivery across Uber Freight's carrier network. ...17.3 Universal Robots Real-Time Data Exchange (RTDE)Real-Time Data Exchange is Universal Robots' synchronous binary TCP protocol on port 30004 that lets extern...16.7 Universal Robots Real-Time InterfaceBinary state interface on port 30003 emitting robot state at the 125 Hz / 500 Hz controller cycle. Predates...16.7 Verizon Connect Vehicle Location APIThe Vehicle Update API in the Reveal Real-time Aggregated Data suite lets integrated customers and partners...15.2 IEA Real-Time Emissions Factors APIProvides up-to-hourly CO2 intensity and emissions data from the power sector for countries worldwide. Data ...14.8 LegiScan Push APIThe LegiScan Push API is a paid subscription service that delivers real-time legislative updates to a clien...14.5 Netflix Zuul Push MessagingZuul Push Messaging enables server-to-client push communications over WebSockets and Server Sent Events (SS...14.3 We Energies Outage Map APIReal-time electricity outage information for We Energies service territory in Wisconsin. Provides geographi...13.9 Boeing Flight Events APIThe Boeing Flight Events API (Beta) provides real-time insights into worldwide flight events, enabling flig...13.6 DBpedia LiveReal-time SPARQL endpoint and Linked Data access over continuously updated DBpedia data derived from near-r...13.2 NDBC HF Radar Surface Currents ServiceProvides near-real-time ocean surface current speeds and directions derived from High-Frequency (HF) radar ...12.5 NDBC Latest Observations ServiceDelivers a consolidated snapshot of the most recent observation from every active NDBC and partner station,...12.5 NDBC Real-Time Data ServiceProvides access to the last 45 days of meteorological and oceanographic observations from NDBC moored buoys...12.5

Minimal 7 Almost no public developer surface

Akur8 Deploy Rating APIAkur8 Deploy auto-generates a real-time REST rating endpoint from a finalized pricing model built in Akur8 ...9.7 TurboRater Real-Time Bridge APIHand a completed quote from TurboRater into a downstream point-of-sale, agency management, or website platf...9.1 Parcel Monitor Tracking APIRESTful JSON tracking API that aggregates shipment data from 1,000+ global carriers with automatic carrier ...9.0 Rabobank Notifications APIReal-time event-notification API delivering payment, account, and consent state changes to a registered cal...7.0 Fauna Event Streaming APIThe Fauna Event Streaming API enables real-time change data capture by maintaining an open connection to th...0.0 Flowdock Streaming APILong-lived HTTP connection to stream.flowdock.com delivering real-time flow events. Two content types: newl...0.0 TD Ameritrade Streaming Market Data APIProvides a WebSocket-based streaming API that delivers up-to-the-second market data including real-time Lev...0.0

Companies reaching this through an API (189)

These companies publish an API, specification or operation carrying “Real-Time” 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.

ABB Robotics Adafruit IO Adobe Analytics Adobe Creative Cloud AEMO Airbnb Airlabs Akur8 Algebras AI Allo-Media Ally Invest Amazon DynamoDB Amazon Q Amperity Ando Apache PySpark Apache Spark APIClaw Appwrite Aptos Aramark Assembled AT Protocol Atlan AutoCAD Axway Azure Maps Betfair Bird Bitget Bithumb BitMart Bitstamp Blazing Bullet Private Limited Blockchain.com Blockdaemon Bloomberg Bloomberg APIs Bloomberg Applications Bloomberg Data Bloomberg Data Sets Bloomberg News Bloomberg Professional Service Blynk BMW ConnectedDrive Boeing Bond Bridge Bud Ecosystem Celigo

Show all 189 companies ↓

Chartbeat Cisco Webex Meetings ClawSpan CME Group CoinEx ColorfulClouds Companies House CoreStory Cornerstone OnDemand Cvent Registration CyberSource Databricks DBpedia Decart DEGIRO Deribit Dune Analytics Electrify America Epsilon3 Equinor Factiva Factset Fauna Federal Aviation Administration FlightAware Flowdock (Discontinued) Fonoa Formant Garmin Gate.io Happyrobot HealthVerity Hookbase HPE Aruba Networking IESO Indeed INRIX International Energy Agency (IEA) Inworld AI Juniper Mist AI Kaiko LBank Learnosity LegiScan Litecoin LiteLLM LLM Gateway LMNT Lyra Magento MEXC Microsoft SharePoint Microsoft Teams MISO Monta Montran MSCI Mux Nasdaq Nasdaq Data Link Netflix Zuul Nitric NOAA — National Oceanic and Atmospheric Administration Ola OpenAI OpenSea Opoint Pagar.me Parcel Monitor Pendle Finance Portkey Power BI Pushbullet Pushover Qlik Sense Quandl (Nasdaq Data Link) R-Zero Rabobank Restream Ribbon Finance Salesforce Salesforce Marketing Cloud Salesforce Sales Cloud Salesforce Service Cloud APIs SaskPower Scottish and Southern Electricity Networks Sense Sitecore Solana Southwest Airlines Southwest Power Pool Spline SpotHero Storyblok Survicate Synthetix Taddy tastytrade TD Ameritrade Tealium Tekion Temenos Transact Tezos The Colony The Trade Desk Thinkific Tidio Tock Tomorrow.io TomTom TradeStation Trello Trint TROLIE TurboRater Uber Freight Umami United Airlines Universal Robots University of Amsterdam University of Michigan-Ann Arbor Upbit Userpilot USGS Water Services Vagaro VATSIM Verizon Connect Vidyard Vocode WazirX Webex WEC Energy Group Weidmüller Wikidata World Meteorological Organization Wowza XRP Ledger Zendesk Zulip

Score breakdown

Frequency

77.8

log-scaled weighted occurrences

Breadth

9.2

spread across providers

Quality lift

40.1

mean composite of providers using it

Cohesion

27.8

strength of nearest seed neighbor

Where this tag comes from

Provider tag431

Api tag354

Openapi tag30

Openapi op tag89

Markets provisional

Kin Score markets whose measured providers carry this tag. Share is the fraction of the market's measured providers that carry it — it describes the market, not this tag.

Market	Share of the market's providers
Speech and Voice AI	45%
Blockchain Node and RPC Infrastructure	40%
Capital Markets and Trading	39%
Matrix Protocol Ecosystem (Matrix.org Foundation directory)	38%
Crypto and Digital-Asset Exchanges	36%
Streaming (Apache Kafka protocol)	33%
Private Markets and Fund Administration (ILPA, broker-dealer registration, options market-data vendors)	20%

Cohort brief

Auto-generated

The 402 providers in the APIs.io catalog tagged Real-Time, scored on the Kin Score. Every figure below is computed from the catalog — nothing here is written.

Providers

402

of 412 in the catalog

Mean Kin Score

38.7

+16.5 vs catalog 22.2

Mean Agent Readiness

26.1

+14.1 vs catalog 12

Spread

0–91.6

median 37.8 · σ 14.4

How the 402 split by band

Exemplar 13Strong 43Developing 119Thin 162Emerging 52Minimal 13

Facet averages, against the whole catalog

Facet	This cohort	Catalog	Difference	Scored
Contract Quality	45.2	17.2	+28	402
Developer Ergonomics	44.8	23.2	+21.6	402
Operational Transparency	26.1	13	+13.1	402
Discoverability	67.5	57.9	+9.6	402
Access Clarity	30.2	23.9	+6.3	402
Contract Governance	12	6.5	+5.5	402

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)	27%	13%	+14
MCP server (first-party)	26%	12%	+14
Agent Skills	0%	0%	0
OAuth scopes	13%	11%	+2
Security	99%	98%	+1
Arazzo workflows	6%	2%	+4
Governance rules	51%	16%	+35

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 Twilio 91.6
2 ElevenLabs 80.4
3 Oracle Hospitality 74
4 ClickHouse 72
5 Vonage 71.3
6 New Relic 71
7 X 69.4
8 Amazon API Gateway 69.1
9 Oracle Siebel 68.9
10 Edge Impulse 67.9

Work with this as data

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

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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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The distribution (Pro)

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  -H "X-API-Key: $APIS_IO_KEY"

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Real-Time

Providers using this tag (412)

APIs with this tag (353)