Smart Generation APIs.
Generation APIs produce an artefact from an input — a summary, a translation, a chart, a QR code, a rendered PDF or image. One catalogue for the "make me a thing" half of a workflow, callable by an agent as easily as by your backend.
Also called content generation APIs, AI writing APIs or document generation APIs79 services in this categorySmart Generation APIs
79 servicesGenerate Certificate Document from JSON API
Render certificates from JSON data as PDF, HTML, or DOCX. Includes page options, download control, and render metadata for issued documents.
Callable LabsGenerate Invoice Document from JSON API
Render invoices from JSON into PDF, HTML, or DOCX. Returns document metadata, page count, and a data URI for billing and workflow systems.
Callable LabsGenerate Letter Document from JSON API
Render structured letter data into PDF, HTML, or DOCX. Return a PDF data URI and render metadata for business letters, notices, and mail-merge workflows.
Callable LabsGenerate Receipt Document from JSON API
Render receipts from structured JSON as PDF, HTML, or DOCX. Returns file metadata, byte size, page count, and a data URI for JSON output.
Callable LabsGenerate Report Document from JSON API
Render structured JSON into PDF, HTML, or DOCX reports. Returns file bytes or a data URI plus render metadata, cache status, and page count.
Callable LabsValidate & Generate Documents from Templates
Validate DOCX templates and render DOCX, HTML, or PDF from JSON data. Get variable checks, syntax errors, and generated document output.
Callable LabsText Analysis & Scoring API
Score text readability with Flesch, Fog, SMOG and more, plus style, skimmability and interestingness scores, word and sentence counts. JSON REST API.
SkycraftVerifiedText Correction & Word Tools API
Correct spelling in text, list synonyms for a word, and singularize or pluralize nouns with one REST call. Clean JSON output, no word lists to maintain.
SkycraftVerifiedRandom Trivia, Quotes & Life Hacks API
Fetch random riddles, trivia, life hacks, quotes, and affirmations as simple JSON. Useful for daily prompts, onboarding cards, and content widgets.
SkycraftVerifiedCreate, Validate & Parse E-Invoice API
Create ZUGFeRD, XRechnung, or Peppol e-invoices, validate XML or PDF documents, and extract invoice data, totals, and rule errors.
Callable LabsWine Pairing & Recommendations API
Wine pairing API that suggests wines for a dish and dishes for a wine, with descriptions and rated wine picks you can filter by price. Free tier, no card.
SkycraftVerifiedDiagram, Math and Code Render API
Render Mermaid, Graphviz, D2 and Vega-Lite diagrams, LaTeX math and highlighted code to PNG, SVG or PDF with one API call. Free tier on ApyHub.
Callable LabsWhich Smart Generation API do you need?
The question you arrived with, and the endpoint that answers it.