What is azure-messaging-webpubsub-java?

A Java library for Azure Web PubSub, a service that sends messages between servers and connected web clients over WebSockets.

Use it to build chat, real-time web applications, live updates, and server-to-client notifications in Java.

It provides the server-side connection needed for live updates, messaging, and push notifications.

azure-messaging-webpubsub-java — Skill for Claude Code by lucaspmarie-

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent

npx skills add lucaspmarie-a11y/claude-skills-vault --skill azure-messaging-webpubsub-java

Clone the repo

git clone --depth 1 https://github.com/lucaspmarie-a11y/claude-skills-vault

Made for: Claude Code.

Or install antigravity-awesome-skills, the plugin that ships this one along with the rest of its 199 skills.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/skills/lucaspmarie-a11y/claude-skills-vault/azure-messaging-webpubsub-java/github.svg)](https://agentmods.dev/skills/lucaspmarie-a11y/claude-skills-vault/azure-messaging-webpubsub-java)

Your own site

<a href="https://agentmods.dev/skills/lucaspmarie-a11y/claude-skills-vault/azure-messaging-webpubsub-java"><img src="https://agentmods.dev/badge/skills/lucaspmarie-a11y/claude-skills-vault/azure-messaging-webpubsub-java/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/skills/lucaspmarie-a11y/claude-skills-vault/azure-messaging-webpubsub-java"><img src="https://agentmods.dev/badge/skills/lucaspmarie-a11y/claude-skills-vault/azure-messaging-webpubsub-java.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 43 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 2,010 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin 86% copy Near-identical to another mod in the catalogue.

Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

Model	Per session	Once invoked
Fable 5.1	$0.00043	$0.02010
Opus 5	$0.00022	$0.01005
Sonnet 5	$0.00009	$0.00402
Haiku 4.5	$0.00004	$0.00201

Measured 8d ago against content hash 7dcc6e1f74a7, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

azure-messaging-webpubsub-java scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 8d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

Origin

This is a copy

86% identical to azure-messaging-webpubsub-java — 33 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

plugins/antigravity-awesome-skills-claude/skills/azure-messaging-webpubsub-java/SKILL.md · 308 lines

How it starts

The opening of the file, as written. The whole thing — 308 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Azure Web PubSub SDK for Java

Build real-time web applications using the Azure Web PubSub SDK for Java.

Installation

<dependency>
    <groupId>com.azure</groupId>
    <artifactId>azure-messaging-webpubsub</artifactId>
    <version>1.5.0</version>
</dependency>

Client Creation

With Connection String

import com.azure.messaging.webpubsub.WebPubSubServiceClient;
import com.azure.messaging.webpubsub.WebPubSubServiceClientBuilder;

WebPubSubServiceClient client = new WebPubSubServiceClientBuilder()
    .connectionString("<connection-string>")
    .hub("chat")
    .buildClient();

With Access Key

import com.azure.core.credential.AzureKeyCredential;

WebPubSubServiceClient client = new WebPubSubServiceClientBuilder()
    .credential(new AzureKeyCredential("<access-key>"))
    .endpoint("<endpoint>")
    .hub("chat")
    .buildClient();

With DefaultAzureCredential

import com.azure.identity.DefaultAzureCredentialBuilder;

WebPubSubServiceClient client = new WebPubSubServiceClientBuilder()
    .credential(new DefaultAzureCredentialBuilder().build())
    .endpoint("<endpoint>")
    .hub("chat")
    .buildClient();

Async Client

import com.azure.messaging.webpubsub.WebPubSubServiceAsyncClient;

WebPubSubServiceAsyncClient asyncClient = new WebPubSubServiceClientBuilder()
    .connectionString("<connection-string>")
    .hub("chat")
    .buildAsyncClient();

Key Concepts

Hub: Logical isolation unit for connections
Group: Subset of connections within a hub
Connection: Individual WebSocket client connection
User: Entity that can have multiple connections

Core Patterns

Send to All Connections

import com.azure.messaging.webpubsub.models.WebPubSubContentType;

// Send text message
client.sendToAll("Hello everyone!", WebPubSubContentType.TEXT_PLAIN);

// Send JSON
String jsonMessage = "{\"type\": \"notification\", \"message\": \"New update!\"}";
client.sendToAll(jsonMessage, WebPubSubContentType.APPLICATION_JSON);

Read the full file on GitHub · 308 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

8d ago First seen · 308 lines · 43 tokens per session scan A 7dcc6e1f74a7

Subscribe to this mod's changes

azure-messaging-webpubsub-java is a skill published in the GitHub repository lucaspmarie-a11y/claude-skills-vault (5 stars, last pushed 3mo ago), licensed MIT. It adds 43 tokens to every session and 2,010 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. It is 86% identical to azure-messaging-webpubsub-java, differing in 33 lines, and is treated as a copy.

Backend and APIs Java Languages

azure-messaging-webpubsub-java