Fixzi MCP Server (io.github.rohitcodilya/fixzi-mcp)

This MCP server monitors MCP servers, API contracts, and AI output schemas for schema drift. It detects when integrations break even if responses still return HTTP 200, classifies changes as breaking, warning, or info, and surfaces alerts so issues are identified before end users are impacted.

🛠️ Key Features

Monitor MCP servers, API contracts, and AI output schemas
Detect schema drift despite HTTP 200 responses
Classify changes into breaking, warning, and info
Provide monitors accessible via an MCP client

🚀 Use Cases

Catch breaking changes in MCP integrations before users encounter failures
Track API contract updates that affect AI tool behavior
Validate AI output schema stability for dependent workflows

⚡ Developer Benefits

Query and operate monitors directly from MCP clients (e.g., Claude Code, Cursor)
Earlier visibility into contract/schema changes for integration maintenance

⚠️ Limitations

Described connection flow is based on HTTP transport and an Authorization Bearer token requirement for setup

Fixzi 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

bash

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:

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:

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.

Fixzi — MCP & API Schema Drift Monitor