Crate oxml_mcp 

oxml-mcp — a Model Context Protocol server for XML.

Four tools: query, validate, check, and inspect. The protocol is handled by rmcp, the official MCP SDK; this crate supplies the tools and the text a model reads.

Why a model wants this: an LLM asked to pull a value out of a large XML document otherwise has to read the whole thing into its context and pattern-match by eye. An XPath tool turns that into a question with an exact answer, and the document never needs to fit in the context window.

The four operations are plain functions – query, validate, check, inspect – and XmlServer is the handler that exposes them as MCP tools. Each answer is returned twice: as text for the model, and as a structured value for a client that wants to read it without parsing prose.

Structs

CheckOutput

A well-formed document.

DocumentArgs

Arguments of xml_check and xml_inspect.

InspectOutput

The shape of a document.

QueryArgs

Arguments of xml_query.

QueryOutput

What an XPath expression selected.

ValidateArgs

Arguments of xml_validate.

ValidateOutput

The outcome of validating a document against a schema.

Violation

One schema violation.

XmlServer

The MCP server: the four tools over rmcp.

Functions

check

Check whether a document is well-formed.

inspect

Summarise a document’s structure.

query

Evaluate an XPath 1.0 expression against a document.

validate

Validate a document against an XML Schema.