Use React 19 Validator with your AI.
Connect your account once and let the AI you already use work with it, without building another integration. Validates React 19 useActionState hook implementations in JSX snippets.
Developed, maintained, and hosted by Vinkius.
MCP VERIFIED · PRODUCTION READY · VINKIUS GUARANTEED
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Works with modern AI clients that support MCP, including ChatGPT, Claude, Cursor, and more.
Complete set · 1 capability
The complete React 19 Validator capability set.
These are the exact actions your AI can choose when you ask it to work with React 19 Validator.
01
1 capability in this set.
Part of 1 available through React 19 Validator.
- 01
Validate use action state
Validates React 19 useActionState hook usage
Observed, not estimated
602ms average. Fast in production.
React 19 Validator is checked daily against the live service.
- Fastest day
- 499ms
- Slowest day
- 765ms
- 14-day trend
- Improving-24%
Connect your client
One URL. Every client.
Activate the Connector, copy your link, and paste it into the client you already use. 1 capability arrives ready to run.
Preview access · not provider authentication
The vk_preview_* token belongs to Vinkius preview infrastructure. It lets Claude discover and display the capabilities of React 19 Validator, so you can see the experience inside your AI.
It does not authenticate your account with React 19 Validator. Actions requiring credentials or live account data may not run until you activate the Connector and authorize the service.
React 19 Validator Connector
You're all set. Choose your MCP client and follow the setup instructions.
https://edge.vinkius.com/vk_preview_RgauFaFAEXI23Uf17fbKMXgg7ocgygpiBgv8DqCT/mcpClaude Desktop
Follow the steps below to connect in seconds.
- 1In Claude Desktop, open Settings → Connectors.
- 2Click “Add custom connector” and paste the connector link above as the remote MCP server URL.
- 3Click Add and start a new chat — React 19 Validator capabilities are ready to use.
{
"mcpServers": {
"react-19-useactionstate-validator-mcp": {
"url": "https://edge.vinkius.com/vk_preview_RgauFaFAEXI23Uf17fbKMXgg7ocgygpiBgv8DqCT/mcp"
}
}
}
Claude
ChatGPT
Cursor
VS Code
Windsurf
Claude Code
JetBrains
Cline
Step-by-step instructions for each client are in the guide. How to connect
FAQ
Questions React 19 Validator owners ask.
- 01
What does this capability validate?
It validates that the useActionState hook in a JSX snippet follows the React 19 signature, ensuring the action handler is properly identified and an initial state is provided.
- 02
Can I use this for Server Actions?
Yes, it is specifically designed to ensure that the action handler pattern used in React 19 Server Actions is structurally sound.
- 03
What happens if the JSX snippet is invalid?
The validate_use_action_state capability will return isValid: false along with a list of specific validation errors detailing the structural failures.
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