Calimero Developer Tools

These tools cover the local development loop — spinning up nodes, generating typed clients, and scaffolding new projects.

Tool	Purpose	Install
merobox	Local multi-node networks, workflow orchestration, testing	pipx install merobox or brew install calimero-network/tap/merobox
calimero-abi-codegen	Generate a typed TypeScript client from a Rust app’s ABI	part of mero-devtools-js
create-mero-app	Scaffold a new Calimero project	npx create-mero-app@latest my-app

merobox

merobox is a Python CLI that runs Calimero nodes (merod) in Docker. It’s the standard way to run a local network for development and testing: start one or more nodes, install apps, create contexts, invite members, call methods, and script all of it as a repeatable YAML workflow.

Common commands:

merobox run --count 2                       # start a 2-node local network
merobox list                                # list running nodes
merobox health --node calimero-node-1       # check node health
merobox logs calimero-node-1 --follow       # tail node logs
merobox bootstrap run workflow.yml          # run a YAML workflow end-to-end
merobox stop calimero-node-1                # stop a node
merobox nuke --prefix calimero-node-1       # delete node data (destructive)

A workflow YAML declares nodes and a sequence of steps (install an app, create a context, generate identities, invite/join, call methods, assert results), making a full multi-node scenario reproducible in one command.

For the complete command and workflow-step reference, see the merobox repository.

calimero-abi-codegen

calimero-abi-codegen reads the ABI manifest your Rust app emits at build time (res/abi.json) and generates a fully typed TypeScript client plus type definitions — so method names, argument shapes, events, and errors are checked at compile time.

calimero-abi-codegen -i abi.json -o <outdir>

Wire it into your build (for example, a generate:client script that runs before your app build) so the client regenerates whenever the Rust API changes. Full options and programmatic usage are documented in the mero-devtools-js reference.

create-mero-app

create-mero-app scaffolds a ready-to-run Calimero project from a starter template (Rust application logic, a frontend, build scripts, and merobox workflows).

npx create-mero-app@latest my-app
cd my-app
# follow the printed next steps (install deps, build the WASM, run the dev loop)

See the mero-devtools-js reference for template options and the generated project layout.

Related topics

• Client SDKs — client libraries for interacting with nodes
• meroctl CLI — command-line node management
• SDK Guide — building Calimero applications
• Examples — reference implementations