A comprehensive JSON Schema validation server implementing the Model Context Protocol (MCP) with support for JSON Schema Draft 2020-12, external references, and real-time streaming validation.
Jsonschema Validator Mcp is an MCP project maintained in the eienwolf/jsonshema_mcp repository. The maintainer describes its purpose as “A comprehensive JSON Schema validation server implementing the Model Context Protocol (MCP) with support for JSON Schema Draft 2020-12, external references, and real-time streaming validation”. Read the project documentation for the complete scope.
The project provides a local client configuration using python. Follow the repository’s build and installation steps before copying it, and replace example paths with the paths on your own computer.
The example declares POSTGRES_HOST, POSTGRES_PORT, POSTGRES_DATABASE, POSTGRES_USER, POSTGRES_PASSWORD. Secret-looking values have been replaced with placeholders. Required and optional labels are shown only when the documentation states them.
Project documentation · Repository · Discovery listing. This profile records the public documentation checked on 2026-10-08.
{
"mcpServers": {
"jsonschema-validator": {
"command": "python",
"args": [
"C:\\path\\to\\jsonschema_mcp\\mcp_server.py"
],
"env": {
"POSTGRES_HOST": "localhost",
"POSTGRES_PORT": "5432",
"POSTGRES_DATABASE": "jsonschema_mcp",
"POSTGRES_USER": "your_username",
"POSTGRES_PASSWORD": "YOUR_POSTGRES_PASSWORD"
}
}
}
}From the project documentation. Replace placeholders and example paths before connecting.
| Variable | Description | Required |
|---|---|---|
| POSTGRES_HOST | Declared in the maintainer’s client configuration. | Check documentation |
| POSTGRES_PORT | Declared in the maintainer’s client configuration. | Check documentation |
| POSTGRES_DATABASE | Declared in the maintainer’s client configuration. | Check documentation |
| POSTGRES_USER | Declared in the maintainer’s client configuration. | Check documentation |
| POSTGRES_PASSWORD | Declared in the maintainer’s client configuration. | Check documentation |
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