A launchpad for useful software

Ship the app.
Borrow the superpowers.

by Promptbox

Publish a page, prototype, dataset, or media file to a shareable URL. Then give your program practical capabilities—language, live web research, images, speech, documents, data, and more—through simple HTTP APIs.

Publish in one requestExplore every API
No SDK requiredWorks with curl, fetch, Python, agents, and automation tools.
Copy-readyClear inputs, response shapes, limits, and examples.
Built to experimentTemporary publishing keeps prototypes lightweight and easy to share.
Path A · Publish

Turn local work into a live URL.

The publish helper accepts text or one validated file, chooses a collision-safe filename, and returns the public URL as JSON. Published items expire after 30 days.

Aa

Publish HTML, Markdown, JSON, or text

Send a name and the finished content. Use the returned URL in a browser, message, agent handoff, or workflow.

  1. Choose a safe name without an extension.
  2. POST JSON to the publish endpoint.
  3. Read url from the 201 response.
curl -X POST https://promptbox.free.nf/api/publish.php \ -H 'Content-Type: application/json' \ -d '{"name":"my-app","extension":"html","text":"<h1>Hello</h1>"}'
↑

Publish an image, audio, video, or text file

Upload one file as multipart form data. Media contents are checked against the extension before anything is published.

  1. Attach one file in the file field.
  2. Optionally provide a cleaner base name.
  3. Keep the returned URL; maximum upload is 10 MiB.
curl https://promptbox.free.nf/api/publish.php \ -F 'name=launch-demo' \ -F 'file=@demo.png'
Path B · Build

Add capabilities with ordinary HTTP.

Use only the helpers your program needs. Each is callable from a browser or server; the detailed reference documents parameters, methods, limits, and response formats.

✦

Language & memory

Text intelligence, Gemini attachments, tool calls, durable memory, notes, and knowledge graphs.

⌁

Web & discovery

Live web answers, exact-page reading, YouTube captions, social search, stocks, and Steam data.

◉

Creative media

Image generation, music, speech synthesis, and audio transcription.

↗

Creation & delivery

Generate HTML, PDFs, and QR cards; send email, transfer files, rate-limit apps, and publish results.

llm.phpllm_gemini.phpllm_jb.phpmemory.phpnotes.phpkgraph.phpweb.phpweb_read.phpyoutube.phptwitter.phpstock.phpsteam.phpimage_gen.phpimage_gen_gemini.phptranscribe.phptts_inworld.phpmusic_gen.phphtml_gen.phppdf_creator.phpqr.phpemail.phptransfer.phprate-limit.phppublish.php
const response = await fetch('https://promptbox.free.nf/api/llm.php', { method: 'POST', headers: {'Content-Type': 'application/json'}, body: JSON.stringify({prompt: 'Give this note a concise title'}) }); const answer = await response.text();