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mcp-jsonschema

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mcp-jsonschema

JSON Schema validation MCP.

Part of Pipeworx — an MCP gateway connecting AI agents to 1476+ live data sources.

Tools

Tool

Description

validate_json_schema

Validate a JSON value against a JSON Schema (draft-07 subset: type, required, properties, additionalProperties, items, enum, const, min/max, minLength/maxLength, pattern, minItems/maxItems, uniqueItems, format). Returns {valid, errors:[{path,message}]}. Keyless, offline.

Related MCP server: JSON Schema Validator MCP

Quick Start

Add to your MCP client (Claude Desktop, Cursor, Windsurf, etc.):

{
  "mcpServers": {
    "jsonschema": {
      "url": "https://gateway.pipeworx.io/jsonschema/mcp"
    }
  }
}

What this endpoint actually serves

tools/list at https://gateway.pipeworx.io/jsonschema/mcp returns the tools in the table above plus the shared Pipeworx meta-tools — ask_pipeworx, discover_tools, search_within, remember/recall and the rest of the gateway-wide set. So the tool count you see is larger than this table: a single-pack endpoint currently lists roughly 30 shared tools alongside the pack's own. The connection's initialize response states its exact scope, and is the authoritative answer for a given day.

This is deliberate, not multiplexing by accident. The meta-tools are what let a scoped connection answer a question this pack does not cover — via ask_pipeworx, which routes across the whole catalog — without you adding a second MCP server. There is currently no way to mount a pack endpoint without them; if the extra schemas cost you more context than the routing is worth, connect to the full gateway once rather than to several pack endpoints.

Or connect to the full Pipeworx gateway to get every pack's tools listed directly, instead of just this one's:

{
  "mcpServers": {
    "pipeworx": {
      "url": "https://gateway.pipeworx.io/mcp"
    }
  }
}

Both URLs reach the same gateway and the same 1476+ data sources. The only difference is which pack's tools are listed directly; ask_pipeworx reaches all of them from either one.

Using with ask_pipeworx

Instead of calling tools directly, you can ask questions in plain English — this works on the pack endpoint above as well as on the full gateway:

ask_pipeworx({ question: "your question about Jsonschema data" })

The gateway picks the right tool and fills the arguments automatically.

More

License

MIT

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Maintenance

ActivityMaintained
ResponsivenessNo issues

Resources

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Related MCP Connectors

Related MCP Servers

  • JSON Schema Validator MCP

    EienWolf
    F
    license
    Not graded
    quality
    D
    maintenance
    A comprehensive server that enables validation of JSON data against JSON Schema Draft 2020-12, with support for external references, schema management, and real-time streaming validation.
    1
    -