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umbraco-openapi-client

umbraco-openapi-client is a skill for Claude Code from umbraco/Umbraco-CMS-Backoffice-Skills. It costs 28 tokens per session (2,017 once invoked), scanned A, original, no licence file.

A guide for setting up an OpenAPI client for authenticated API calls in the Umbraco backoffice. OpenAPI describes how software can call a web API.

In plain words
What is it for?
Use it when connecting Umbraco backoffice code to a custom authenticated API.
Why use it?
It provides the required setup for custom APIs, including calls that need user authentication.

Skill for Claude Code

Written for Claude Code: allowed-tools in frontmatter.

Part of the umbraco-cms-backoffice-skills plugin — 67 skills, 1 agent shipped together

not rated 27repo changed 1mo ago A scan Socket: passSnyk: warn 28 tokens no licence

Good fit Use it when connecting Umbraco backoffice code to a custom authenticated API.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/umbraco/umbraco-cms-backoffice-skills/umbraco-openapi-client
View source ↗ umbraco/Umbraco-CMS-Backoffice-Skills
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 umbraco/Umbraco-CMS-Backoffice-Skills --skill umbraco-openapi-client
Clone the repo
git clone --depth 1 https://github.com/umbraco/Umbraco-CMS-Backoffice-Skills

Made for: Claude Code.

Or install umbraco-cms-backoffice-skills, the plugin that ships this one along with the rest of its 67 skills, 1 agent.

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 umbraco-openapi-client

README.md
[![agentmods](https://agentmods.dev/badge/skills/umbraco/umbraco-cms-backoffice-skills/umbraco-openapi-client/github.svg)](https://agentmods.dev/skills/umbraco/umbraco-cms-backoffice-skills/umbraco-openapi-client)
Your own site
<a href="https://agentmods.dev/skills/umbraco/umbraco-cms-backoffice-skills/umbraco-openapi-client"><img src="https://agentmods.dev/badge/skills/umbraco/umbraco-cms-backoffice-skills/umbraco-openapi-client/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.

agentmods 80×15 button for umbraco-openapi-client

Your own site · 80×15
<a href="https://agentmods.dev/skills/umbraco/umbraco-cms-backoffice-skills/umbraco-openapi-client"><img src="https://agentmods.dev/badge/skills/umbraco/umbraco-cms-backoffice-skills/umbraco-openapi-client.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 28 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,017 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • Socket pass 18 Mar 2026
  • Snyk warn 15 Feb 2026
How audits are shown
Origin unknown 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 5.1 $0.00028 $0.02017
Opus 5.5 $0.00011 $0.00807
Sonnet 5.5 $0.00006 $0.00403
Haiku 4.5 $0.00003 $0.00202

Measured 1mo ago against content hash 8b97485efe4e, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

umbraco-openapi-client scanned grade A with 1 finding 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 1mo 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.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

fetch(swaggerUrl)
plugins/umbraco-backoffice-skills/skills/umbraco-openapi-client/SKILL.md · 278 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

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. 1mo ago Changed · +20 lines 8b97485efe4e
  2. 2mo ago First seen · 258 lines · 28 tokens per session scan A 741e17d7d941

Subscribe to this mod's changes

umbraco-openapi-client is a skill published in the GitHub repository umbraco/Umbraco-CMS-Backoffice-Skills (27 stars, last pushed 1mo ago), with no licence file. It adds 28 tokens to every session and 2,017 once invoked, about $0.0001 per session on Opus 5.5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

Backend and APIs
Related

umbraco-openapi-client compared with skills from other repositories

umbraco-openapi-client next to 6 skills from other repositories
ModTypeStarsLast pushLicenceScanTokensWorks with
umbraco-openapi-clientumbraco/Umbraco-CMS-Backoffice-SkillsSkill271mo agononeA28Claude Code
mem0-oss-to-platformmem0ai/mem0Skill69k3d agoApache-2.0A217Claude Code, Codex
azure-mgmt-botservice-dotnetmicrosoft/skillsSkill3.2ktodayMITA78Claude Code
fastapi-router-pymicrosoft/skillsSkill3.2ktodayMITA46Claude Code
api-designericrisco/rsc-harnessSkill573todayMITA105Claude Code, Codex
migrate-segw-to-raparc-mcp/arc-1Skill254todayMITA106Claude Code
telnyx-messaging-hosted-curlteam-telnyx/aiSkill225todayMITA45Claude Code