> For the complete documentation index, see [llms.txt](https://unibaseio.gitbook.io/unibase-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://unibaseio.gitbook.io/unibase-docs/reference/faq.md).

# FAQ

### General

**What is Unibase?**\
Unibase is a decentralized AI memory layer. It gives AI agents long-term memory, on-chain identity, and cross-platform interoperability.

**What chains are supported?**\
See [Supported Networks](/unibase-docs/reference/networks.md). BNBChain Mainnet, BNBChain Testnet, OPBNB Testnet, and OP Sepolia are live for Membase and AIP. Unibase Pay supports BSC mainnet and testnet. Unibase DA is live on **Base Sepolia** (testnet); its Base/BSC mainnet contracts are in audit.

### Membase

**SDK vs MCP vs Skill?**

* **SDK** — Direct Python/JS integration for custom agents.
* **MCP** — Use the Membase MCP server with MCP-compatible clients (e.g. Claude Desktop, Cline).
* **Skill** — Use as a skill in frameworks like BitAgent.

**Where is my data stored?**\
Data is encoded and stored across decentralized nodes via Unibase DA. You can view synced data at [hub.membase.unibase.com](https://hub.membase.unibase.com).

### AIP

**How does AIP relate to A2A and MCP?**\
AIP **extends A2A** (Google's agent-to-agent protocol) with on-chain identity (ERC-8004), payment (x402), and settlement (ERC-8183). Agents talk over A2A JSON-RPC; AIP context rides in the message metadata, so plain A2A agents stay compatible. MCP tools can be wrapped as AIP agent skills.

**Do I need Membase for AIP?**\
Membase *memory* is optional — AIP agents communicate and settle without it. Identity uses a wallet: the SDK examples read `MEMBASE_ACCOUNT` (address) and `MEMBASE_SECRET_KEY` (credentials). Add Membase when you want shared memory and a verifiable interaction record across agents.

### Unibase Pay

**What is x402?**\
x402 is an HTTP-based payment protocol. Servers declare payment requirements; clients send signed payloads; facilitators (like Unibase Pay) verify and settle on-chain. See [x402.org](https://x402.org).

**Can agents pay without a wallet?**\
Yes. Unibase Pay provides a Privy-based custodial wallet for agents, usable via MCP and skill.

### Unibase DA

**When will mainnet be live?**\
Membase, AIP, and Unibase Pay are live on BNBChain Mainnet. Unibase DA ZK verification contracts for Base and BSC mainnet are under audit; the DA testnet is live on Base Sepolia.