> ## Documentation Index
> Fetch the complete documentation index at: https://docs.postbase.so/llms.txt
> Use this file to discover all available pages before exploring further.

# Configuration

> Environment variables and provider setup.

Postbase is configured with environment variables. Only the core Supabase keys
are required; everything else enables an optional capability.

## Core

| Variable                        | Purpose                                                 |
| ------------------------------- | ------------------------------------------------------- |
| `NEXT_PUBLIC_SUPABASE_URL`      | Supabase project URL.                                   |
| `NEXT_PUBLIC_SUPABASE_ANON_KEY` | Supabase anon key (browser).                            |
| `SUPABASE_SERVICE_ROLE_KEY`     | Service-role key for trusted server jobs.               |
| `NEXT_PUBLIC_APP_URL`           | Your public origin — OAuth issuer + MCP connector base. |
| `DATABASE_URL`                  | Postgres connection string (for migrations).            |

## Media storage (R2 / S3)

Set your bucket credentials to enable the [media library](/using/media)
(`R2_*` / S3-compatible keys) and configure the bucket's CORS to expose the
`ETag` header for multipart uploads.

## Platforms

Each platform you publish to needs its own OAuth app and keys (X, LinkedIn,
Instagram/Facebook, TikTok, YouTube). Add the keys and the channel's **Connect**
button lights up. Channels stay hidden until their provider is configured.

## Optional

| Capability     | How to enable                                                    |
| -------------- | ---------------------------------------------------------------- |
| Billing        | Stripe keys + price ids.                                         |
| AI generation  | The image/video provider key — enables [Generate](/ai/generate). |
| MCP over OAuth | Works out of the box once `NEXT_PUBLIC_APP_URL` is set.          |

<Note>
  A capability that isn't configured is simply hidden in the UI — the app runs
  fine with just the core Supabase setup.
</Note>