Apps

Small self-contained web tools, built and run in place

Dashboard — Markets + news + weather in a single view Free

Place Explorer — Find places nearby + local weather Free

Timer — Countdown timer with start, pause, and reset Free

12 apps available

Build apps, set your price, earn 90%% of every sale.

Calling it

Metered methods answer an unauthenticated call with 402 and an x402 challenge — pay it and the same request succeeds, with no account at all. A token works too.

curl -H "Authorization: Bearer $MU_TOKEN" \
  https://micro.mu/api/v1/apps/embed

The same method over MCP, which is what an agent speaks: apps_embed. The answer is identical.

How every call behaves →

Methods

15 creditsPOST /api/v1/apps/build

Build a small app from a description, save it, and return its details and URL. An app is a single page — a tracker, a checklist, a counter — that keeps its own store and runs in the browser

Changes something, so POST only. Draws 15 credits per call, or accepts payment.

Argument	Type	Description
`prompt` *	string	Description of the app to build, e.g. 'an expense tracker', 'a packing checklist', 'a water intake counter'

curl -X POST \
  -H "Authorization: Bearer $MU_TOKEN" \
  -H "Content-Type: application/json" \
  -d '{"prompt":"prompt"}' \
  https://micro.mu/api/v1/apps/build

prompt *

Costs 15 credits

POST /api/v1/apps/create

Create an app — a small, self-contained HTML tool hosted here. Takes the HTML; apps_build writes it for you from a description

Changes something, so POST only.

Argument	Type	Description
`name` *	string	App name, e.g. "Pomodoro Timer"
`html` *	string	The app's HTML, inline CSS and JavaScript included, up to 256KB
`slug`	string	URL-friendly id, e.g. pomodoro-timer. Derived from the name if omitted
`description`	string	What the app does. Defaults to the name
`tags`	string	Comma-separated tags
`icon`	string	An SVG icon
`price`	number	Credits charged per use, 0 for free, up to 1000

curl -X POST \
  -H "Content-Type: application/json" \
  -d '{"html":"html","name":"name"}' \
  https://micro.mu/api/v1/apps/create

name *html *slugdescriptiontagsiconprice

8 creditsPOST /api/v1/apps/edit

Edit an app you own — its name, description, tags, icon, HTML or price. Fields left out keep their value

Changes something, so POST only. Draws 8 credits per call, or accepts payment.

Argument	Type	Description
`slug` *	string	The app's URL slug, e.g. pomodoro-timer
`name`	string	New name. Left alone if omitted
`description`	string	New description. Left alone if omitted
`tags`	string	New comma-separated tags. Left alone if omitted
`html`	string	New HTML, up to 256KB. Left alone if omitted
`icon`	string	New SVG icon. Left alone if omitted
`price`	number	Credits charged per use, 0 for free, up to 1000

curl -X POST \
  -H "Authorization: Bearer $MU_TOKEN" \
  -H "Content-Type: application/json" \
  -d '{"slug":"slug"}' \
  https://micro.mu/api/v1/apps/edit

slug *namedescriptiontagshtmliconprice

Costs 8 credits

GET /api/v1/apps/embed

Get the HTML that puts an app on another page — an iframe tag pointing at the app, which runs there sandboxed the same way it runs here. Apps that charge cannot be embedded, and an app that calls mu. only reaches this instance from a page on it

Argument	Type	Description
`slug` *	string	The app's URL slug

curl \
  "https://micro.mu/api/v1/apps/embed?slug=slug"

slug *

POST /api/v1/apps/fork

Fork an app into your own account, to change independently of the original

Changes something, so POST only.

Argument	Type	Description
`slug` *	string	Slug of the app to fork
`new_slug`	string	Slug for the copy. Generated from the original if omitted

curl -X POST \
  -H "Content-Type: application/json" \
  -d '{"slug":"slug"}' \
  https://micro.mu/api/v1/apps/fork

slug *new_slug

GET /api/v1/apps/read

Read the details of one app by its slug

Argument	Type	Description
`slug` *	string	The app's URL slug, e.g. pomodoro-timer

curl \
  "https://micro.mu/api/v1/apps/read?slug=slug"

slug *

GET /api/v1/apps/search

Search the apps directory for small, useful tools, by name, description or tag

Argument	Type	Description
`query`	string	Search query — name, description or tag
`tag`	string	Filter to apps carrying this tag

curl \
  "https://micro.mu/api/v1/apps/search"

querytag

POST /api/v1/apps/test

Test an app by checking its HTML and running its mu.api calls server-side, so an author finds out what is broken without opening it

Changes something, so POST only.

Argument	Type	Description
`slug` *	string	The app's URL slug

curl -X POST \
  -H "Content-Type: application/json" \
  -d '{"slug":"slug"}' \
  https://micro.mu/api/v1/apps/test

slug *

The same methods are tools over MCP, and every service on this instance is in one reference. Same method, same answer, same price.