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

# Glossary

Key terms used across these docs (kept short for scanning):

* **Paywall** — Configuration that enforces pricing, model/provider access, and payment logic for an app or assistant.
* **Mode** — Where wallets live and who controls funds: **Default** (app‑scoped) vs **Shared** (cross‑app).
* **Wallet** — Where a user’s balance is stored (real funds or credits), scoped by mode.
* **Ledger** — Record of charges, top‑ups, deposits.
* **Proxy** — The enforcement/metering layer that preserves OpenAI compatibility.
* **Model Registry** — List of available models with pricing & metadata.
* **Metering** — Measuring token usage (prompt + completion) per request for accurate charges.
* **Charge** — Deduction from balance for a specific request or tool call.
* **Deposit** — Developer‑initiated credit in default mode.
* **Top‑up** — User‑initiated addition of real funds/credits.
* **Authorization** — User’s grant that allows your paywall to spend (shared mode).