About Fixzi AI Validator
Fixzi AI Validator monitors MCP servers, API contracts, and AI output schemas. Developers can query monitor status and changes or run checks through an MCP client, with changes classified by severity.
Key features
- 01View monitor status and check results
- 02Review changes by severity
- 03Inspect MCP server tool snapshots
- 04Create monitors and run checks
- 05Run AI output validators
Use cases
- 01Check whether an MCP server changed recently
- 02Review the health of an API contract
- 03Monitor a newly deployed MCP server
- 04Validate a product description schema
MCP support
It exposes an MCP server endpoint for clients to query monitors, change logs, and validators, and to run authorized checks. Connection requires a Fixzi API token.
Configuration
Remote servers need no local install. Pick your client, then copy the config or install in one click.
https://fixzi.ai/api/mcpclaude mcp add --transport http fixzi https://fixzi.ai/api/mcp{"mcpServers":{"fixzi":{"type":"http","url":"https://fixzi.ai/api/mcp"}}}Open in Cursor{"servers":{"fixzi":{"type":"http","url":"https://fixzi.ai/api/mcp"}}}Open in VS Code{"mcpServers":{"fixzi":{"type":"http","url":"https://fixzi.ai/api/mcp"}}}{"mcpServers":{"fixzi":{"serverUrl":"https://fixzi.ai/api/mcp"}}}Run commands in a terminal; paste JSON into the client’s MCP config and restart. Servers that need sign-in will prompt on first connect.
Tools
Details
From the project READMEFixzi MCP Server
Monitor MCP servers, API contracts, and AI output schemas — from inside Claude Code, Cursor, or any MCP client.
Your MCP servers, APIs, and AI outputs can break while still returning 200. Fixzi watches the contracts your integrations depend on, classifies every change (breaking / warning / info), and alerts you before your users hit it. This MCP server lets your AI tools query and operate those monitors directly.
Connect
Claude Code
claude mcp add --transport http fixzi https://fixzi.ai/api/mcp \
--header "Authorization: Bearer YOUR_FIXZI_API_TOKEN"
Or add to your project's .mcp.json:
{
"mcpServers": {
"fixzi": {
"type": "http",
"url": "https://fixzi.ai/api/mcp",
"headers": {
"Authorization": "Bearer YOUR_FIXZI_API_TOKEN"
}
}
}
}
Claude Desktop
Add to claude_desktop_config.json:
{
"mcpServers": {
"fixzi": {
"type": "streamable-http",
"url": "https://fixzi.ai/api/mcp",
"headers": {
"Authorization": "Bearer YOUR_FIXZI_API_TOKEN"
}
}
}
}
Get your API token at https://fixzi.ai/settings/api-tokens. When creating the token, grant the abilities for the tools you want to use (see below).
Tools
Monitoring (MCP servers, API contracts, AI validators)
| Tool | What it does | Ability required |
|---|---|---|
fixzi_list_monitors | List all your monitors (MCP / API contract / AI validator) with health status | — |
fixzi_get_monitor_status | Current status, last check result, consecutive failures for one monitor | — |
fixzi_get_recent_changes | Change log for a monitor: severity, what changed, before/after (filter by date/severity) | — |
fixzi_get_current_snapshot | Current tool list of a monitored MCP server (names, descriptions, schemas) | — |
fixzi_run_check_now | Trigger a check immediately (async — poll status after) | monitors:write |
fixzi_create_mcp_monitor | Create a new MCP server monitor from a URL | monitors:write |
AI output validation
| Tool | What it does | Ability required |
|---|---|---|
fixzi_list_validators | List your AI output validators | validators:read |
fixzi_get_validator | Details of a specific validator | validators:read |
fixzi_run_check | Run a validation check right now | validators:check |
fixzi_list_checks | Recent check history | validators:read |
Example prompts
Once connected, ask your agent things like:
- "Check if my MCP server changed this week" — chains
fixzi_list_monitors→fixzi_get_recent_changes - "Is my payments API contract still healthy?"
- "Set up a monitor for the MCP server I just deployed at https://example.com/mcp"
- "Run my product-description validator and tell me if the schema still passes"
Requirements
- MCP server access requires the Pro+ plan — see https://fixzi.ai/pricing
- Fixzi's web app includes a free tier (1 monitor of each type, daily checks, email alerts) and free tools, including a no-signup MCP Server Checker to test any MCP server instantly.
Learn more
Comments
New to MCP?
From what the protocol is to installing your first server, these answers cover most first questions.
An open protocol that defines how AI applications connect to external tools and data in a uniform way. Clients talk to the model; MCP servers provide tools, resources and prompt templates. They exchange standard messages, so one server can be reused by many clients.