From source

Only needed to change Wasit itself, or to run the bundled fixture servers that let you try a full settlement run against something you control.

git clone https://github.com/wasit-dev/wasit.git
cd wasit
npm install
npm run build
cp .env.example .env

On Windows PowerShell the last line is:

Copy-Item .env.example .env

Note — build order matters. npm run build builds core first, then the CLI and the server, because both compile against core's emitted type declarations rather than its source. Building a package on its own after changing core will typecheck against the previous build.

Run the checks against your own fixtures

Three fixture servers ship with the repo — real servers built on the official SDKs, not mocks. Each runs in its own terminal:

npx tsx packages/core/test/fixtures/x402-real-server.ts
npx tsx packages/core/test/fixtures/mpp-charge-server.ts
npx tsx packages/core/test/fixtures/mpp-channel-server.ts

Then point the CLI at them:

node packages/cli/dist/index.js test --target http://localhost:3001/protected

Tests

The whole suite is offline: no keys, no target, no network. Run npm run build before npm run typecheck -w packages/cli, since the CLI typechecks against core's compiled declarations.