FastX402 Frontmatter Parse

Use this endpoint when you need a quick, stateless, accountless way to extract YAML front matter from a markdown string without setting up a local parser. Ideal for AI agent pipelines processing blog posts, static site content, or documentation files where you want structured metadata (title, author, tags) separated from the body — especially when you're already operating in a pay-per-call x402 context and don't want to manage dependencies.

• Missing `markdown` query parameter returns an error
• Malformed YAML in the front matter block may cause parse errors or return empty data
• Markdown with no front matter returns has_frontmatter: false with an empty data object
• Very large markdown documents may hit query string length limits