API & MCP

Everything a person can do on Printshop, a program or AI agent can do with the same inputs and get the identical result.

HTTP API

• GET https://printshop.usefulweb.app/api/v1/tools – catalog
• GET https://printshop.usefulweb.app/api/v1/tools/{id} – inputs, output schema, examples
• POST https://printshop.usefulweb.app/api/v1/tools/{id}/calculate – run a tool
• GET https://printshop.usefulweb.app/api/v1/workflows · POST https://printshop.usefulweb.app/api/v1/workflows/{id}/run
• OpenAPI 3.1: /openapi.json · /openapi.yaml
• Errors: application/problem+json; 422 includes per-field errors.

Tools on Printshop

• QR Code Generator (print-ready) – QR codes for links, text, Wi-Fi, contacts and more — as vector PDF, SVG and PNG. printshop_qr_code
• Barcode Generator (EAN-13, UPC-A, Code 128) – EAN-13, UPC-A and Code 128 barcodes with check digits, true-size PDF, SVG and PNG. printshop_barcode
• Printable Calendar Maker – Month or year calendars in 17 languages with week numbers and public holidays. printshop_calendar
• Label Sheet Maker with CSV Mail Merge – Address labels, name badges and product labels from a CSV, for any sheet layout. printshop_label_sheet
• Graph, Dot, Isometric, Hex and Music Paper – Printable grid, dot, isometric, hexagon, music staff and lined paper at exact sizes. printshop_graph_paper
• Poster Tiler (Big Picture on Many Pages) – Print a big poster on ordinary paper: tiles with overlap, crop marks and an assembly map. printshop_poster_tiler
• Booklet Maker (Saddle-Stitch Imposition) – Fold-and-staple booklets: notebook or calendar pages imposed in the right order. printshop_booklet
• RuleDate Deadline Calculator – Business-day and deadline maths with public holidays and a step-by-step rule trace. ruledate
• Photo Print Size Planner – Find how large your photo can print at your chosen resolution. lumina_print_planner
• Image Grid Splitter – Slice a photo into numbered tiles without losing edge pixels. lumina_image_splitter
• Comic Book & Booklet Planner – Plan a multi-page comic, contact sheet and folded booklet order. panelcraft_book_plan

Every result contains

inputs (normalised, defaults applied), summary, result (validated against the published schema), units, assumptions, sources, warnings, computedAt and links.

MCP (Model Context Protocol)

• Streamable HTTP endpoint: https://printshop.usefulweb.app/mcp – protocol revisions 2026-07-28 (stateless) and 2025-11-25 / 2025-06-18 / 2025-03-26 (initialize handshake).
• Tools: printshop_qr_code, printshop_barcode, printshop_calendar, printshop_label_sheet, printshop_graph_paper, printshop_poster_tiler, printshop_booklet, ruledate, lumina_print_planner, lumina_image_splitter, panelcraft_book_plan
• Local stdio connector: node src/mcp-stdio.ts

{
  "mcpServers": {
    "usefulweb": { "type": "http", "url": "https://printshop.usefulweb.app/mcp" }
  }
}