# Azure Web PubSub

**Canonical:** https://apis.io/providers/microsoft-azure-web-pubsub/  
**Website:** https://azure.microsoft.com/en-us/products/web-pubsub  
**APIs profiled:** 8

Azure Web PubSub is a fully-managed service that enables building real-time, two-way messaging applications using publish-subscribe patterns over WebSockets. It supports broadcasting messages to clients in groups, sending messages to specific connections or users, and integrating with serverless event handlers for scalable real-time experiences.

## Kin Score — 52.5 / 100 (developing)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 52.5).

| Facet | Score |
|---|---|
| Discoverability | 81.5 |
| Contract Quality | 60.5 |
| Governance | 13.6 |
| Contract Governance | 13.6 |
| Operational Transparency | 42.1 |
| Developer Ergonomics | 50.0 |
| Commercial Clarity | 60.5 |
| Access Clarity | 60.5 |

## Agent readiness — 30.3 (agent-aware)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | derived |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | yes |
| Idempotency | no |
| Error Semantics | no |
| OpenAPI Examples | no |
| Rate Limit Signal | documented |
| Event Surface Described | derived |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |

## Access

Freemium · Self-serve signup — onboarding: self-serve, pricing: freemium, trial: no (confidence: high).

## APIs (8)

- **Azure Web PubSub Client and Upstream Events** — AsyncAPI 2.6 description of the Azure Web PubSub client WebSocket subprotocols (json.webpubsub.azure.v1 and json.reliable.webpubsub.azure.v1) and the CloudEvents 1.0 HTTP upstre...
- **Azure Web PubSub Hubs REST API** — REST API for managing hub configurations within a Web PubSub instance. Hubs provide logical isolation for messaging and allow per-hub configuration of event handlers, anonymous ...
- **Azure Web PubSub for Socket.IO REST API** — REST API for managing Azure Web PubSub for Socket.IO instances. Provides a fully managed Socket.IO server replacement that allows existing Socket.IO applications to scale to mil...
- **Azure Web PubSub Private Endpoint Connections REST API** — REST API for managing private endpoint connections to a Web PubSub service instance. Enables secure, private connectivity from virtual networks to Web PubSub through Azure Priva...
- **Azure Web PubSub Shared Private Link Resources REST API** — REST API for managing shared private link resources for a Web PubSub service. Enables outbound private connectivity from Web PubSub to other Azure resources such as Key Vault an...
- **Azure Web PubSub ClientToken API** — Generate JWT tokens for client connections
- **Azure Web PubSub Hub API** — Send messages and manage connections, groups, and users in a hub
- **Azure Web PubSub Permission API** — Permission management for client connections

## Agentic access (1)

- **Microsoft Azure Web Pubsub Agentic Access** — 19 operations · 15 acting · 1 human-in-the-loop

## Security (2)

- **Microsoft Azure Web Pubsub Authentication** — http · 1 scheme
- **Microsoft Azure Web Pubsub Domain Security** — TLSv1.3 · HSTS · DMARC

## Plans (1)

- **Microsoft Azure Web Pubsub Plans Pricing**

## Tags

Messaging, Pub-Sub, Real-Time, Serverless, WebSockets

---

Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/microsoft-azure-web-pubsub/). Scores are computed from the provider's own public artifacts under a published rubric.