JSON-LD API
Generate valid schema.org JSON-LD structured data from simple fields — the markup Google and other search engines use for rich results. The generate endpoint builds ready-to-embed JSON-LD for the types that matter most for SEO: Article (and BlogPosting / NewsArticle) with author and publisher, Product with offers, price, availability and an aggregate rating, Organization and LocalBusiness with postal address and opening hours, Person, WebSite with a Sitelinks search box (SearchAction), BreadcrumbList, FAQPage, Event and Recipe with ingredients and step-by-step instructions. Pass plain fields — or JSON arrays and newline lists for breadcrumbs, FAQ questions, ingredients and social profiles — and get back a clean JSON-LD object, optionally wrapped in a ready-to-paste <script type="application/ld+json"> tag. The types endpoint documents every supported type and its fields. Everything is assembled locally and deterministically, so it is instant and private. Ideal for CMS and static-site pipelines, SEO tooling, e-commerce product pages, documentation and content platforms. Pure local computation — no key, no third-party service, instant. Live, nothing stored. 3 endpoints. This GENERATES schema.org markup; to extract structured data or Open Graph tags from a page use an HTML-parsing API, and to audit on-page SEO use an SEO API.
api.oanor.com/jsonld-api
