validator
MCP serverDev toolsThe validator is an MCP server that checks oh-my-posh configurations and segment snippets against the official schema. It gives an agent a way to confirm that a prompt config is well-formed before it is applied. The server reports schema violations so the person can fix them.
Use validator in Claude, ChatGPT or Ahel Desktop
Free. Sign in, add validator and connect your AI. About a minute.
Also: Claude Code · Cursor · Codex
Then ask your AI: use validator to validate config
No key or account is asked for. Not verified by us yet: Ahel has not run a call through it.
Details
Available today. Use it from your connected AI after setup.
No key or account is asked for. Not verified by us yet: Ahel has not run a call through it.
Have an MCP client that can connect to MCP servers.
What your AI can do with it
- Validate a full oh-my-posh configuration against the official schema
- Validate individual segment snippets against the official schema
- Report schema violations found in a configuration
- Check prompt configs before they are applied
Getting started
- Have an MCP client that can connect to MCP servers.
- Add the validator MCP server to the client's server configuration.
- Provide the oh-my-posh configuration or segment snippet to validate.
- Read the reported schema violations and correct the configuration.
Install validator
The server’s own address, for the clients that take one directly. Or connect Ahel once and every client you use reads it from one address, with the account kept on Ahel rather than in each client’s config.
Claude Code
claude mcp add --transport http --scope user validator 'https://ohmyposh.dev/api/mcp'Run it once in your project, then open /mcp to approve any sign-in the server asks for.
Claude Desktop
https://ohmyposh.dev/api/mcpAdd a custom connector in Settings, paste this address, and approve the sign-in.
Cursor
cursor://anysphere.cursor-deeplink/mcp/install?name=validator&config=eyJ1cmwiOiJodHRwczovL29obXlwb3NoLmRldi9hcGkvbWNwIn0=Open the link and Cursor adds the server at that address.
ChatGPT
https://ohmyposh.dev/api/mcpIn Settings, enable Developer mode, create an MCP app, and paste this address. Your plan and workspace must allow custom apps.
Codex
codex mcp add validator --url 'https://ohmyposh.dev/api/mcp'Run it once, then sign in with codex mcp login validator if the server asks for an account.
From the project's README
As published by jandedobbeleer/oh-my-posh in README.md.
width="400" src="https://raw.githubusercontent.com/jandedobbeleer/oh-my-posh/main/website/static/img/logo.png" alt="Oh My Posh logo – Prompt theme engine for any shell" />
This repo was made with love using GitKraken.
Sponsors
Join the community
What started as the offspring of oh-my-posh2 for PowerShell resulted in a cross platform, highly customizable and extensible prompt theme engine. After 4 years of working on oh-my-posh, a modern and more efficient tool was needed to suit my personal needs.
:heart: Support :heart:
- Show your love with a t-shirt!
- One time support, or a recurring donation?
Features
- Shell and platform agnostic
- Easily configurable
- The most configurable prompt utility
- Fast
- Secondary prompt
- Right prompt
- Transient prompt
Documentation
Reviews
Thanks
- Chris Benti providing the first influence to start oh-my-posh
- Keith Dahlby for creating posh-git and making life more enjoyable
- Robby Russell for creating oh-my-zsh, without him this would probably not be here
- Janne Mareike Koschinski for providing information on how to get certain information using Go (and the amazing README)
- Starship for doing great things
Tools it offers (2)
What this server listed when Ahel dialed its public endpoint in Sep 2026, with no key and no account of yours. The names are the server’s own.
validate_configvalidate_segment
Signals
- GitHub stars
- 24k
- Forks
- 3k
- Last commit
- Sep 2026
Questions
- What does the validator check?
- It checks oh-my-posh configurations and segment snippets against the official schema.
- Does it fix configurations automatically?
- No. It reports schema violations so the person can fix them.
- What kind of tool is it?
- It is an MCP server in the dev-tools category.
- Can it validate a single segment snippet?
- Yes. It validates individual segment snippets as well as full configurations.
Advanced
- Delivery
- validator MCP server → your Ahel connector (mcp.ahel.ai) → your AI.
- Item type
- mcp-server
- Key
dev-ohmyposh-validator- Source
- github.com/jandedobbeleer/oh-my-posh
- Hosted endpoint
https://ohmyposh.dev/api/mcp
github.com/jandedobbeleer/oh-my-posh