MCP toolsCheck any pageUpdated October 24, 2026

Schema creator

mttr_schema_createAny key

What does `mttr_schema_create` do?

Makes JSON-LD for one page from the values given, with the fields Google marks required or recommended for each type, and fetches nothing. Empty fields are left out, never made up. Any key may make this call, on any public site.

When to use it

A page has no structured data and you know what it should say.
You want markup that the schema markup checker will pass before you put it in a template.

What you ask

You say“Make LocalBusiness JSON-LD for Acme Plumbing in Phoenix, phone +1-602-555-0142.”

Your assistant calls

mttr_schema_create({
  type: "LocalBusiness"
})

Argument	Type	Needed	What it is
`type`	One of these	Yes	The schema type to make.`LocalBusinessOrganizationProductArticleBreadcrumbListServiceEventWebSite`
`as`	Text	No	A more exact type, for LocalBusiness (such as Plumber, RoofingContractor, Restaurant) or Article (BlogPosting, NewsArticle).
`fields`	Fields	No	The values, by field key, as text: such as { "name": "Acme Plumbing", "city": "Phoenix", "telephone": "+1-602-555-0142" }. Lists, such as images, are one value a line.

What comes back

The JSON-LD as data, and inside its script tag ready to paste.
The required fields left empty, and what is not right.
The recommended fields left out.
Every field the type takes, with its key.

What it answersSample

Field	Need	Given
name	Required	Acme Plumbing
address	Required	Phoenix
telephone	Recommended	+1-602-555-0142
openingHoursSpecification	Recommended	Left out

Made-up sites and figures, to show the shape of the answer. The answer itself is JSON.

Over HTTP

It is GET /api/v1/make/schema, with your key as a bearer token:

HTTP

curl "https://mttr.si/api/v1/make/schema?type=LocalBusiness" \
  -H "Authorization: Bearer $MTTR_KEY"

When it fails

When	Status	What to do
Your assistant has no key yet	401 over MCP	Sign up with `mttr_signup`, then connect again with the key it gives.

Every error’s wording is in the API reference.

The call in full, with its HTTP address, each argument’s type, who may make it and the call in four languages, is mttr_schema_create in the API reference.