# shardd > A globally distributed credit ledger for metered billing. Credit, debit, and hold accounts from any region — no central database. First-party SDKs for Rust, Python, TypeScript, and Kotlin/JVM. ## Docs - [Introduction](https://shardd.xyz/guide/introduction.md) - [Quickstart](https://shardd.xyz/guide/quickstart.md) - [Official SDKs](https://shardd.xyz/guide/sdks.md) - [shardd CLI](https://shardd.xyz/guide/cli.md) - [Drop-in AI agent prompt](https://shardd.xyz/guide/ai-agent-setup.md) - [Public Edge Clients](https://shardd.xyz/guide/public-edge-clients.md) - [Architecture](https://shardd.xyz/guide/architecture.md)