xmlvalid

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Validate XML and e-invoices (XSD, DTD, RelaxNG, EN 16931, Peppol, XRechnung), explain errors

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https://xmlvalid.com/mcp

Authorization (optional)

An xmlvalid API key (Dashboard → API keys, free tier), for validate_xml and get_validation; the lookup tools need none

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explain_error Read-only

Explain an XML parsing or schema validation error message: what it means, why it happens and how to fix it, with an example. Understands libxml2 (xmllint, PHP, Python lxml, xmlvalid), Java (Xerces cvc-* codes, SAXParseException) and .NET (System.Xml) wording; paste the message as reported, stack trace prefix included. No API key needed.

messagestring, required

The error message, as the parser or validator reported it.

Tools (5)

explain_error

read-only

Argument	Type	Description
message*	string	The error message, as the parser or validator reported it.

Input schema (JSON)

{
  "type": "object",
  "required": [
    "message"
  ],
  "properties": {
    "message": {
      "type": "string",
      "description": "The error message, as the parser or validator reported it."
    }
  }
}

explain_rule

Explain an e-invoicing business rule by its id, such as BR-CO-15, BR-DE-1, PEPPOL-EN16931-R001 or a national CIUS rule: its message, level, the rule sets it belongs to, why invoices fail it and how to fix them. No API key needed.

read-only

Argument	Type	Description
id*	string	The rule id as the validator reports it, such as BR-CO-15.

Input schema (JSON)

{
  "type": "object",
  "required": [
    "id"
  ],
  "properties": {
    "id": {
      "type": "string",
      "description": "The rule id as the validator reports it, such as BR-CO-15."
    }
  }
}

get_validation

The status and result of a validation started with validate_xml that was still running when it returned (status "queued" or "running"). Results are kept for 24 hours.

read-only

Argument	Type	Description
id*	string	The id validate_xml returned.

Input schema (JSON)

{
  "type": "object",
  "required": [
    "id"
  ],
  "properties": {
    "id": {
      "type": "string",
      "description": "The id validate_xml returned."
    }
  }
}

search_schemas

Search xmlvalid's catalog of official XML schemas (UBL, CII, Peppol, XRechnung, Factur-X, ISO 20022, HL7, sitemaps…) by name, namespace, root element or area. Returns each schema's slug to pass to validate_xml, its version and the business rules it checks. No API key needed.

read-only

Argument	Type	Description
query	string	Words to look for, such as "peppol invoice", "xrechnung cii" or "pain.001". Leave out to list the first schemas.

Input schema (JSON)

{
  "type": "object",
  "properties": {
    "query": {
      "type": "string",
      "description": "Words to look for, such as \"peppol invoice\", \"xrechnung cii\" or \"pain.001\". Leave out to list the first schemas."
    }
  }
}

validate_xml

Validate an XML document with xmlvalid: well-formedness, an XSD, DTD or RelaxNG schema, and for e-invoices the Schematron business rules of EN 16931, Peppol BIS, XRechnung, Factur-X and national formats. Pass the document as `xml` (its text) or `url` (a public http(s) address), and a `schema`: a catalog slug from search_schemas, a saved schema ("@orders-v3"), or "auto" to use the e-invoice profile the document names. Without a schema only well-formedness is checked. Returns valid, errors and warnings with line, column, message, rule and a help_url explaining each. Counts as one API validation of the key's monthly quota.

Argument	Type	Description
url	string	A public http(s) URL of the document, fetched by xmlvalid.
xml	string	The XML document itself. Use url instead for a document on the web.
name	string	A file name to show in the result, such as invoice-42.xml.
wait	integer	Seconds to wait for the result before returning a pending status to poll with get_validation.
schema	string	A catalog slug (see search_schemas), "@<name>" for a saved schema, or "auto" for the e-invoice profile the document names. Leave out to check well-formedness only.
rules_version	string	Pin Schematron rule sets to releases, as rule-set@version, comma-separated ([email protected]): the call fails with rules_version_mismatch when one has moved on. The result's rule_sets lists the releases that ran.