Certificates & badges

Generate certificates and badges via API

Issue a personalised PDF or image certificate the moment someone finishes a course, passes a test or earns a badge — at any volume, billed by usage instead of capped.

100 renders / month free · no card · overage billed, never blocked

Certificate of completionAvery Mendozahas completed Advanced Rendering

★

14 October 2026

A single template, rendered from your data

How it works

Build the certificate template

Place the recipient name, course, date and seal as fields over your branded design.

Call the API on completion

POST the recipient's details and get back a PDF or PNG in about two seconds.

Deliver it anywhere

Email it, store the signed URL, or let learners download it — no per-certificate licence fees.

One API call

curl https://api.mostlyrender.com/v1/renders \
  -H "Authorization: Bearer mr_test_YOUR_KEY" \
  -H "Content-Type: application/json" \
  -d '{"templateId":"tpl_certificate","modifications":{"name":"Avery Mendoza","course":"Advanced Rendering","date":"14 October 2026"}}'

Questions

Can I render certificates as PDF?

Yes — every template renders to PNG, JPG, WebP or PDF; certificates and invoices usually go out as PDF.

Is there a per-certificate fee?

No. You pay your plan's flat per-render rate with transparent overage — not a per-document or per-seat tax.