3CX API Patterns

3CX API Patterns is a skill for Claude Code, Codex from WYRE-AI/msp-claude-plugins. It costs 93 tokens per session (2,139 once invoked), scanned A, original, Apache-2.0.

Technical guidance for connecting to and using 3CX’s native MCP server, which is built into the PBX. It explains per-PBX endpoints, OAuth authorization, account permissions, setup, and how to discover available tools; the source describes the feature as an Alpha release.

In plain words
What is it for?
Use it to configure a native 3CX MCP connection, understand what the approved account can access, and identify the tools available on a particular PBX.
Why use it?
It helps avoid using the wrong server or authentication method and makes clear that available tools and behavior may change before the final release.

Skill for Claude CodeCodex

Part of the 3cx plugin — 4 skills, 3 commands shipped together

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.

agentmods
npx agentmods add skills/wyre-ai/msp-claude-plugins/api-patterns
Any agent
npx skills add WYRE-AI/msp-claude-plugins --skill api-patterns
Clone the repo
git clone --depth 1 https://github.com/WYRE-AI/msp-claude-plugins

Made for: Claude Code, Codex.

Or install 3cx, the plugin that ships this one along with the rest of its 4 skills, 3 commands.

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.

agentmods badge for 3CX API Patterns

README.md
[![agentmods](https://agentmods.dev/badge/skills/wyre-ai/msp-claude-plugins/api-patterns.svg)](https://agentmods.dev/skills/wyre-ai/msp-claude-plugins/api-patterns)
Your own site
<a href="https://agentmods.dev/skills/wyre-ai/msp-claude-plugins/api-patterns"><img src="https://agentmods.dev/badge/skills/wyre-ai/msp-claude-plugins/api-patterns.svg" alt="Measured on agentmods" height="20"></a>
Per session 93 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,139 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found 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.

ModelPer sessionOnce invoked
Fable 5 $0.00093 $0.02139
Opus 5 $0.00046 $0.01069
Sonnet 5 $0.00019 $0.00428
Haiku 4.5 $0.00009 $0.00214

Measured 4d ago against content hash c6b161dc49d8, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

3CX API Patterns 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 4d 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.

msp-claude-plugins/3cx/3cx/skills/api-patterns/SKILL.md · 190 lines

How it starts

The opening of the file, as written. The whole thing — 190 lines — stays where its author put it; the contents beside it link to each section on GitHub.

3CX API Patterns

Overview

3CX added a native MCP server built directly into the PBX, introduced in 3CX V20 Update 10 (announced July 30, 2026 as an Alpha release — 3CX's own release notes describe Update 10 Alpha as "intended for testing and evaluation only"). Treat everything in this plugin as based on that Alpha: exact tool names, the permissions reference, and behavior may all shift before 3CX ships Update 10 GA.

This is a different project from the older third-party SSIG-IT/3cx-mcp-server on GitHub, a community-built MCP server that talks to 3CX's REST API rather than shipping inside the PBX. Do not mix the two up, and do not carry claims from the community project into this one — in particular, its "Enterprise/Enterprise Plus license required" claim is specific to that project and is not confirmed for 3CX's native MCP server.

Anti-triggers

  • The community 3cx-mcp-server project — different codebase, different tool surface, different auth model (its own API-key setup rather than per-PBX OAuth). Nothing in this plugin describes it, and nothing about it should be assumed here.
  • A customer's "the phones are down" ticket — that's ticket handling in the PSA, not a 3CX MCP call. Use halopsa-tickets, connectwise-psa-tickets, or autotask-tickets to work the ticket itself; come back to this plugin once you need the PBX-side facts.
  • WYRE's Conduit vendor catalog — 3CX has no catalog entry there and, structurally, cannot: Conduit's catalog vendors share one fixed endpoint per vendor, and every 3CX PBX is its own origin with its own authorization server. See Connection & Authentication below for the two ways this plugin actually reaches a PBX.

Connection & Authentication

Every PBX is its own endpoint

Unlike a hosted SaaS MCP server, there is no single 3CX MCP URL. Each PBX exposes its own endpoint at its own FQDN, following the pattern:

https://yourpbx.3cx.eu/mcp

(or whatever FQDN that customer's PBX actually uses). Transport is Streamable HTTP. A skill, command, or agent in this plugin that needs to call a tool always does so against whichever PBX endpoint the current session is already connected to — nothing here can assume a fixed URL across customers.

Read the full file on GitHub · 190 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.

  1. 4d ago First seen · 190 lines · 93 tokens per session scan A c6b161dc49d8

Subscribe to this mod's changes

3CX API Patterns is a skill published in the GitHub repository WYRE-AI/msp-claude-plugins (44 stars, last pushed yesterday), licensed Apache-2.0. It adds 93 tokens to every session and 2,139 once invoked, about $0.0005 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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