WebSockets
Variants seen in the corpus:
WebSocketsWebsocketswebsockets
Providers using this tag (34)
Ranked by API Evangelist rating — Exemplar and Strong are expanded by default.
Exemplar 1 Complete, well-documented, and agent-ready
Strong 4 Solid coverage with minor gaps
Developing 16 Usable, with meaningful gaps to close
Thin 8 Limited public surface area
Emerging 5 Early or largely undocumented
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 →
Strong 3 Solid coverage with minor gaps
EODHD WebSockets Real-Time APIStreams real-time trade and quote updates over WebSockets for US stocks, forex, and cryptocurrencies, allow...Paymentsense Connect WebSockets APIDocumented WebSockets interface for the Connect platform, offering an event-driven alternative to the REST ...zerohash Private WebSocket APIAuthenticated WebSocket feed delivering a full account-balance snapshot on subscribe followed by incrementa...
Developing 10 Usable, with meaningful gaps to close
Gemini Live APILow-latency real-time voice and video interactions with Gemini using WebSockets for streaming multimodal in...Azure Web PubSub Client and Upstream EventsAsyncAPI 2.6 description of the Azure Web PubSub client WebSocket subprotocols (json.webpubsub.azure.v1 and...Trigger.dev Realtime APIThe Trigger.dev Realtime API streams live run state and typed stream data to backend and frontend clients. ...Microsoft Windows 10 WebSockets APIThe WebSockets API from Microsoft Windows 10 — 1 operation(s) for websockets.May Mobility Fleet Realtime APIA WebSocket streaming API that delivers live May Mobility vehicle data in two modes. Telemetry mode streams...PartyKit Party.Server (Server API)Library API for defining server-side logic for a "party" - a backend object backed by a Cloudflare Durable ...PartyKit PartySocket (Client API)Browser and runtime client library for connecting to a PartyKit server over WebSockets. Wraps the standard ...Exonum Node HTTP APIThe HTTP surface an Exonum node serves. The explorer service exposes REST endpoints under /api/explorer (bl...Pusher Channels APIPub/sub channels over WebSocket (client) and HTTP (server publish). Public, private, and presence channels ...HoppscotchHoppscotch is a lightweight open-source browser-based API client supporting REST, GraphQL, WebSockets, SSE,...
Thin 4 Limited public surface area
FernFern transforms a single API source of truth (OpenAPI, AsyncAPI, Protobuf, OpenRPC, or the Fern Definition ...Pushbullet Realtime Event StreamSecure WebSocket stream that delivers realtime events to a Pushbullet account, including periodic `nop` kee...Bloomberg HTTP APIHTTP wrapper making the Bloomberg Open API available via HTTP and WebSockets, allowing clients to access re...NestJSNestJS is a progressive Node.js framework for building efficient, reliable, and scalable server-side applic...
Emerging 3 Early or largely undocumented
Nitric Websocket ResourceSDK resource for declaring realtime bidirectional websocket endpoints with connect, disconnect, and message...ABB Robot Web Services (RWS)Robot Web Services is the canonical REST/HTTP(S) API exposed by ABB OmniCore (RobotWare 7) and IRC5 control...ABB Robot Web Services SubscriptionsWebSocket-based subscription service that pushes change events for subscribed RWS resources (IO signals, RA...
Score breakdown
Frequency
44.8
log-scaled weighted occurrences
Breadth
0.9
spread across providers
Quality lift
50.3
mean composite of providers using it
Cohesion
8.8
strength of nearest seed neighbor
Related tags
Pub-Sub 6 co-occurrences
Real-Time 22 co-occurrences
Market Data 8 co-occurrences
Serverless 5 co-occurrences
WebSocket 5 co-occurrences
Streaming 9 co-occurrences
Messaging 8 co-occurrences
Cryptocurrency 6 co-occurrences
Where this tag comes from
Provider tag24
Api tag20
Openapi tag1
Openapi op tag1
Cohort brief
Auto-generatedThe 34 providers in the APIs.io catalog tagged WebSockets, scored on the Kin Score. Every figure below is computed from the catalog — nothing here is written.
Providers
34
all scored
Mean Kin Score
41.1
+20.4 vs catalog 20.7
Mean Agent Readiness
22.8
+13.1 vs catalog 9.7
Spread
11.7–71.5
median 41.7 · σ 14.2
How the 34 split by band
Exemplar 1Strong 6Developing 14Thin 6Emerging 7Minimal 0
Facet averages, against the whole catalog
| Facet | This cohort | Catalog | Difference | Scored |
|---|---|---|---|---|
| Developer Ergonomics | 45 | 17.9 | +27.1 | 34 |
| Contract Quality | 44.3 | 17.5 | +26.8 | 34 |
| Operational Transparency | 28 | 11.3 | +16.7 | 34 |
| Access Clarity | 38.7 | 22.3 | +16.4 | 34 |
| Discoverability | 74.2 | 60.4 | +13.8 | 34 |
| Contract Governance | 12.4 | 6.4 | +6 | 34 |
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) | 32% | 16% | +16 |
| MCP server (first-party) | 12% | 7% | +5 |
| Agent Skills | 0% | 0% | 0 |
| OAuth scopes | 21% | 9% | +12 |
| Security | 100% | 88% | +12 |
| Arazzo workflows | 12% | 2% | +10 |
| Governance rules | 38% | 13% | +25 |
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 Polygon 71.5
- 2 EODHD 64.9
- 3 Zero Hash 61.1
- 4 Paymentsense 59.1
- 5 Lighter 55.9
- 6 Liveblocks 55.3
- 7 AgentMail 54.7
- 8 Azure Web PubSub 52.1
- 9 Trigger.dev 52.1
- 10 Microsoft Windows 10 49
Top by Agent Readiness
- 1 EODHD 66.3
- 2 Polygon 57.3
- 3 AgentMail 45.7
- 4 Zero Hash 39.3
- 5 StreamElements 37.2
- 6 Google Gemini 30.2
- 7 Ably 29.1
- 8 Lighter 29
- 9 Kotoba 28.5
- 10 Tiingo 28.5
All 34 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.