Sample JSON
Discovered Fields (click to add rule)
Paste JSON above and click Explore Fields
Field Rules 0
No rules yet — explore fields or click Add Rule
Group Rules
JSON to Validate
Validation Results
Run validation to see results
Saved Templates
Select a template to view details
37
Validators
0
Templates
7
MCP Tools
MCP Server Config

Add to your claude_desktop_config.json or MCP client:

{
  "mcpServers": {
    "ark-validator": {
      "url": "http://localhost:5000/mcp",
      "transport": "http"
    }
  }
}
MCP Tools
validate_json
Validate JSON against a template
list_templates
List all available templates
get_template
Get full template details
create_template
Create a new template
delete_template
Delete a template by name
get_validation_types
List all validator types
check_field
Test a single value inline
REST API Reference Basic Auth Required
Base URL: http://localhost:5000  |  Credentials: admin / ark2024!
MCP Resources
ark://validation-types/all
All 37+ validator type definitions with parameters
ark://validation-types/sap
SAP/OData specific validators (14 types)
ark://templates/{name}
Individual template with all rules — discoverable via list
resource templates list
URI template for dynamic template resource discovery