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Fixzi AI Validator MCP Server

@rohitcodilya

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Basic information

Category

Developer Tools

Transports

stdio

Author

rohitcodilya

Submitted by

Rohit Mittal

About Fixzi AI Validator MCP Server

Monitor AI output schemas and API contracts for breaking changes — validate LLM JSON responses against defined schemas on a schedule

#ai-response-validator#api-monitoring#json-schema#llm#validation#openai#anthropic#developer-tools

Fixzi AI Validator MCP Server config

Add this server to your MCP-compatible client using the configuration below.

{
  "mcpServers": {
    "fixzi": {
      "type": "streamable-http",
      "url": "https://fixzi.ai/api/mcp",
      "headers": {
        "Authorization": "Bearer YOUR_FIXZI_API_TOKEN"
      }
    }
  }
}

Fixzi AI Validator MCP Server tools

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Overview

What is Fixzi AI Validator?

Fixzi AI Validator monitors AI model JSON output for schema drift and API contracts for breaking changes. It connects to Claude Code, Cursor, or any MCP-compatible AI tool to check validators directly from the editor.

Listed on official MCP Registry

How to use Fixzi AI Validator?

Add the server to your MCP client config (e.g., ~/.claude/claude_desktop_config.json) using the streamable-http transport URL https://fixzi.ai/api/mcp and a Bearer API token with validators:read ability. For Cursor, add it as a remote server in Settings → MCP. Once connected, ask your AI assistant to list validators, run a check, or view check history.

Key features of Fixzi AI Validator

  • fixzi_list_validators — List all AI output validators in your Fixzi account
  • fixzi_get_validator — Get details of a specific validator including JSON schema and last check status
  • fixzi_run_check — Run a synchronous validation check and get pass/fail with schema errors
  • fixzi_list_checks — Get recent check history for a validator

Use cases of Fixzi AI Validator

  • Detect JSON schema drift in AI model outputs during development
  • Catch breaking changes in API contracts before deployment
  • Validate structured AI responses directly from your editor
  • Automate schema compliance checks in CI/CD pipelines

Frequently asked questions

1

What does Fixzi AI Validator do that other tools don't?

It monitors both AI model JSON output for schema drift and API contracts for breaking changes, integrated directly into MCP-compatible editors.

2

What are the requirements to use Fixzi AI Validator?

A Fixzi account at https://fixzi.ai, a Pro+ plan, and an API token with `validators:read` ability created at https://fixzi.ai/settings/api-tokens.

3

What transport and authentication does Fixzi AI Validator use?

It uses the streamable-http transport with Bearer token authentication via the `Authorization` header.

4

Where are my validators and check data stored?

All validators, schemas, and check history live in your Fixzi account at https://fixzi.ai.

5

Is there documentation available?

Yes. Full docs are at https://fixzi.ai/docs/mcp-integration, with separate sections for CI/CD integration and API reference.

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