webmcp-sdk-skill

webmcp-sdk-skill is a skill for Claude Code from opentiny/agent-skills. It costs 61 tokens per session (1,021 once invoked), scanned A, original, no licence file.

A development guide for using the WebMCP SDK to add agent-facing features to web applications. Web agents are software agents that can perform tasks through web pages; the guide covers the SDK’s listed client, server, remote-control, and browser-extension parts.

In plain words
What is it for?
Use it when developing WebMCP skill packages or making a front-end application usable by web agents.
Why use it?
It gives developers the documentation and instructions needed to connect a web application with WebMCP-based agents. This reduces the need to work out how the SDK’s components fit together.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the webmcp-sdk-skill plugin — 1 skill shipped together

Good fit Use it when developing WebMCP skill packages or making a front-end application usable by web agents.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/opentiny/agent-skills/webmcp-sdk-skill
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 opentiny/agent-skills --skill webmcp-sdk-skill
Clone the repo
git clone --depth 1 https://github.com/opentiny/agent-skills

Made for: Claude Code.

Or install webmcp-sdk-skill, the plugin that ships this one along with the rest of its 1 skill.

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 webmcp-sdk-skill

README.md
[![agentmods](https://agentmods.dev/badge/skills/opentiny/agent-skills/webmcp-sdk-skill/github.svg)](https://agentmods.dev/skills/opentiny/agent-skills/webmcp-sdk-skill)
Your own site
<a href="https://agentmods.dev/skills/opentiny/agent-skills/webmcp-sdk-skill"><img src="https://agentmods.dev/badge/skills/opentiny/agent-skills/webmcp-sdk-skill/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 webmcp-sdk-skill

Your own site · 80×15
<a href="https://agentmods.dev/skills/opentiny/agent-skills/webmcp-sdk-skill"><img src="https://agentmods.dev/badge/skills/opentiny/agent-skills/webmcp-sdk-skill.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 61 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,021 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 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 $0.00061 $0.01021
Opus 5.5 $0.00024 $0.00408
Sonnet 5.5 $0.00012 $0.00204
Haiku 4.5 $0.00006 $0.00102

Measured 2mo ago against content hash c9ccb40e1bc1, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

webmcp-sdk-skill 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 2mo 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.

skills/webmcp-sdk-skill/SKILL.md · 49 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. 2mo ago First seen · 49 lines · 61 tokens per session scan A c9ccb40e1bc1

Subscribe to this mod's changes

webmcp-sdk-skill is a skill published in the GitHub repository opentiny/agent-skills (19 stars, last pushed 1mo ago), with no licence file. It adds 61 tokens to every session and 1,021 once invoked, about $0.0002 per session on Opus 5.5. 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.

Related

webmcp-sdk-skill compared with skills from other repositories

webmcp-sdk-skill next to 6 skills from other repositories
ModTypeStarsLast pushLicenceScanTokensWorks with
webmcp-sdk-skillopentiny/agent-skillsSkill191mo agononeA61Claude Code
drawer-expertopentiny/webmcp-sdkSkill1233d agoMITA29Claude Code, Codex
webmcp-cli-cdpopentiny/webmcp-sdkSkill1233d agoMITA48Claude Code, Codex
webmcp-cli-wxtopentiny/webmcp-sdkSkill1233d agoMITA68Claude Code, Codex
next-sdk-page-agentopentiny/webmcp-sdkSkill1233d agoMITA51Claude Code, Codex
订单管理助手opentiny/webmcp-sdkSkill1233d agoMITA48Claude Code, Codex
客户价保单创建及审核opentiny/webmcp-sdkSkill1233d agoMITA37Claude Code, Codex