Environment variables

app.envs exposes the EnvsModule, which lets you manage the KEY=value pairs your application sees at runtime.

const app = await api.applications.fetch("abc123def456abc123def456");
app.envs; // EnvsModule

Every method resolves to the full env set after the operation completes — so you always get an up-to-date { key: value } map back.

Limits: up to 256 variables per application, keys up to 1024 characters and values up to 4096 characters.

Listing environment variables

const envs = await app.envs.list();

console.log(envs);
// { DATABASE_URL: "postgres://...", FEATURE_FLAG: "true" }

app.envs.set(envs) merges new variables into the existing set. Existing keys not present in the call are preserved.

await app.envs.set({
    DATABASE_URL: "postgres://...",
    FEATURE_FLAG: "true",
});

app.envs.replace(envs) overwrites every variable. Anything not listed is removed.

await app.envs.replace({
    DATABASE_URL: "postgres://new-host...",
});
// FEATURE_FLAG is now gone

Pass an empty object to wipe all variables:

await app.envs.replace({});

app.envs.delete(keys) removes the listed keys. Unknown keys are silently ignored.

await app.envs.delete(["FEATURE_FLAG"]);