# A-Identity

> Documentation for A-Identity, the passport and wallet for the agentic economy: verified ERC-8004 agent identity, x402 and Circle Nanopayments micro-payments, Gateway and CCTP, on Circle Arc, Celo, X Layer and Robinhood Chain.

## Docs

- [Introduction](https://a-identity.mintlify.app/introduction.md): A-Identity is the passport and wallet for the agentic economy.
- [Quickstart](https://a-identity.mintlify.app/quickstart.md): Three ways in, depending on who you are.
- [OKX.AI ASP: Agent Trust Oracle](https://a-identity.mintlify.app/okx-ai-asp.md): A-Identity live on OKX.AI as an A2MCP ASP (Agent #6271): six pay-per-call trust tools, settled with x402 on X Layer mainnet.
- [Know Your Agent](https://a-identity.mintlify.app/concepts/know-your-agent.md): The whole idea, explained the way you would explain it to your grandmother.
- [Bounded Authority](https://a-identity.mintlify.app/concepts/bounded-authority.md): A spend limit you set, enforced three independent ways — including an on-chain revert.
- [The Web2.5 Layer](https://a-identity.mintlify.app/concepts/web25.md): Web2 trust on Web3 rails, with a human in the loop.
- [Reputation](https://a-identity.mintlify.app/concepts/reputation.md): How A-Identity scores an agent's track record, deterministically.
- [ERC-8004](https://a-identity.mintlify.app/protocols/erc-8004.md): Trustless Agents. Portable on-chain identity, reputation, and validation.
- [x402](https://a-identity.mintlify.app/protocols/x402.md): Pay-per-action over the HTTP 402 status code, settled in stablecoins.
- [Circle Nanopayments](https://a-identity.mintlify.app/protocols/nanopayments.md): Gas-free, sub-cent USDC over the x402 exact scheme, settled by Circle Gateway in batches.
- [ERC-8183 Escrow](https://a-identity.mintlify.app/protocols/escrow.md): Agent-to-agent job escrow: USDC held on-chain, released on delivery.
- [MCP](https://a-identity.mintlify.app/protocols/mcp.md): The Model Context Protocol. How agents reach your tools.
- [Chains](https://a-identity.mintlify.app/chains/overview.md): Every chain A-Identity knows about, what is actually deployed on each, and which ones are wired end to end today.
- [Build on Arc](https://a-identity.mintlify.app/chains/arc.md): Connect to Circle Arc, where agents pay gas in USDC. Network config, App Kit unified balance, and deploy steps.
- [Build on Celo](https://a-identity.mintlify.app/chains/celo.md): Celo network config for mainnet and Celo Sepolia, the ERC-8004 registries live there, and the first-party x402 facilitator that settles in USDC.
- [Build on OKX X Layer](https://a-identity.mintlify.app/chains/xlayer.md): X Layer network config, the OKX.AI ERC-8004 registry we read live, and how the trust oracle is listed and paid there.
- [Build on Robinhood Chain](https://a-identity.mintlify.app/chains/robinhood.md): Robinhood Chain network config for both networks, the canonical ERC-8004 registries already deployed there, and the x402 facilitator we run for it.
- [Build on Arbitrum One](https://a-identity.mintlify.app/chains/arbitrum.md): Arbitrum One network config, the canonical ERC-8004 registries already deployed there, and our x402 rail settling in native Circle USDC.
- [Circle Gateway](https://a-identity.mintlify.app/chains/gateway.md): A unified, chain-abstracted USDC balance — move value across chains, gaslessly.
- [Circle CCTP](https://a-identity.mintlify.app/chains/cctp.md): Native USDC across chains by burn-and-mint — never wrapped.
- [Account Lifecycle](https://a-identity.mintlify.app/app/account-lifecycle.md): From signing in to a funded, permissioned, live agent.
- [Quickstart](https://a-identity.mintlify.app/developers/quickstart.md): Verify an agent and gate a paid tool in a few minutes.
- [SDK](https://a-identity.mintlify.app/developers/sdk.md): Identity and payments inside your own agent.
- [CLI](https://a-identity.mintlify.app/developers/cli.md): Resolve agents, check reputation, and inspect chains from your terminal.
- [MCP Server](https://a-identity.mintlify.app/developers/mcp-server.md): The read-only A-Identity MCP server, tool by tool.
- [Agent Manifest](https://a-identity.mintlify.app/developers/agent-manifest.md): A machine-readable card that tells agents how to work with you.