ToolmarkTools for AI agents that operate your web app

Declare a tool once in your UI code. Expose it to your in-app agent, WebMCP, desktop MCP, guided tours and tests, with policy, confirmation and validation in one registry.

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Concepts

API reference

One registry

Tools, scopes, schemas (Standard Schema v1) and results live in a single framework-free registry with zero runtime dependencies.

Every caller

The same declaration serves an in-app agent over bridge protocol v1, WebMCP, a paired desktop MCP client, tours and Playwright tests.

Safe by default

Per-caller policy, deferred or inline confirmation for consequential tools, redaction of sensitive fields, and no code execution.

Forms first

react-hook-form, Inertia, plain DOM forms and wizards become fill/submit tools that respect what the user typed.

Guided tours

Authored or agent-planned tours in show, guide and do modes, with an accessible, themeable overlay and RTL support.

Lint

toolmark lint checks the manifests your pages expose, with an optional TypeSafe judge for description quality.