Environment Variables

Web (`apps/web`)

Variable	Required	Default	Description
`VITE_API_URL`	No	`""`	Base URL of the API server. Empty means same origin. In local dev, Vite proxies `/api` to `localhost:3001` so this is not needed.

Variable	Required	Default	Description
`DEFINDEX_VAULT_ID`	No	`""`	Overrides the DeFindex vault contract address at runtime. When empty, the address from `CONTRACT_ADDRESSES.testnet.defindex.vault` in `packages/shared/src/constants.ts` is used. Blend and vault contract addresses are always sourced from constants.
`PORT`	No	`3001`	Fastify server port (local dev only).
`ALLOWED_ORIGIN`	No	`"https://usemeridian.vercel.app"`	CORS allowed origin for the Fastify server. Set to your frontend domain in production if running Fastify as a standalone server.

Set environment variables in the Vercel dashboard under Project Settings > Environment Variables, or via the CLI:

bash

vercel env add DEFINDEX_VAULT_ID

Variables prefixed with VITE_ are inlined at build time and exposed to the browser. Do not put secrets in VITE_ variables.

Create .env files at the package level if needed:

bash

# apps/api/.env
PORT=3001
DEFINDEX_VAULT_ID=C...   # optional, leave empty to use the address in constants.ts

The Fastify server loads .env via the dotenv package on startup.

Variable	Purpose
`STELLAR_NETWORK`	Switch between `testnet` and `mainnet`. Currently hardcoded to testnet.
`REDIS_URL`	If Redis caching is added back to the API layer. Currently not used.