build an onchain AI agent
Coinbase AgentKit is the default when the product is an autonomous agent that acts onchain: it supplies the agent wallet and composable actions and stays framework-agnostic. x402 lets the agent pay for gated services, Circle (USDC) is the settlement asset, ERC-8004 gives the agent verifiable identity and reputation, and EigenCloud can attest to agent computations where trust matters. Privy is excluded as a human-user wallet layer rather than the agent's own wallet, though it remains useful on the human-facing side.
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Recommended stack
Coinbase AgentKit
Use Coinbase AgentKit to give the agent a wallet and composable onchain actions, framework-agnostic across LangChain, Vercel AI SDK, and others.
ERC-8004
Give the agent verifiable identity, discovery, and reputation for other agents and services to rely on.
EigenCloud
Use verifiable compute to attest to agent computations or outputs where trust-minimization matters.
Considered and excluded
- privy — Privy provisions wallets for human users via auth; this intent is about an autonomous agent's own wallet, where AgentKit's agent-wallet model fits better. Privy is still useful for the human-facing side of an agent app.
Risks
- Agent-controlled funds require explicit spend limits, action allowlists, and key-management guardrails before production.
- Prompt injection can drive unintended onchain actions; validate and constrain the agent's tool surface.
- Token and chain support vary; confirm the agent's actions are available on the target chain.
- Agent behavior is non-deterministic; add simulation, dry-run, and human-in-the-loop checks for high-value actions.
Next steps
- Scope the exact onchain actions the agent may take, then set spend caps and allowlists.
- Pick an agent framework and wire AgentKit's wallet + actions into it.
- Fund and test the agent wallet on a testnet before mainnet.
- Add an x402/USDC payment flow if the agent must pay for services.
What the agent receives
The intent page exposes the same structured recommendation shape agents should use: matched intent, stack roles, readiness scores, difficulty, risks, next steps, and registry version.
{
"intent": "I want to build an AI agent that can hold a wallet and transact, pay, or call contracts onchain",
"matched_intent": "build-an-onchain-ai-agent",
"recommended_stack": [
{
"slug": "agentkit",
"name": "Coinbase AgentKit",
"role": "wallet_and_identity",
"readiness_score": 81,
"integration_difficulty": "medium",
"reason": "Use Coinbase AgentKit to give the agent a wallet and composable onchain actions, framework-agnostic across LangChain, Vercel AI SDK, and others."
},
{
"slug": "x402",
"name": "x402",
"role": "payments_and_commerce",
"readiness_score": 89,
"integration_difficulty": "medium",
"reason": "Let the agent programmatically pay for x402-gated APIs and services."
},
{
"slug": "circle",
"name": "Circle (USDC & CCTP)",
"role": "payments_and_commerce",
"readiness_score": 84,
"integration_difficulty": "low",
"reason": "Settle agent payments and payouts in USDC."
},
{
"slug": "erc-8004",
"name": "ERC-8004",
"role": "agent_identity_and_trust",
"readiness_score": 78,
"integration_difficulty": "medium",
"reason": "Give the agent verifiable identity, discovery, and reputation for other agents and services to rely on."
},
{
"slug": "eigencloud",
"name": "EigenCloud",
"role": "supporting_protocol",
"readiness_score": 76,
"integration_difficulty": "high",
"reason": "Use verifiable compute to attest to agent computations or outputs where trust-minimization matters."
}
],
"excluded_candidates": [
{
"slug": "privy",
"reason": "Privy provisions wallets for human users via auth; this intent is about an autonomous agent's own wallet, where AgentKit's agent-wallet model fits better. Privy is still useful for the human-facing side of an agent app."
}
],
"risks": [
"Agent-controlled funds require explicit spend limits, action allowlists, and key-management guardrails before production.",
"Prompt injection can drive unintended onchain actions; validate and constrain the agent's tool surface.",
"Token and chain support vary; confirm the agent's actions are available on the target chain.",
"Agent behavior is non-deterministic; add simulation, dry-run, and human-in-the-loop checks for high-value actions."
],
"next_steps": [
"Scope the exact onchain actions the agent may take, then set spend caps and allowlists.",
"Pick an agent framework and wire AgentKit's wallet + actions into it.",
"Fund and test the agent wallet on a testnet before mainnet.",
"Add an x402/USDC payment flow if the agent must pay for services."
],
"generated_with": "composewith.eth",
"registry_version": "2026.07.02-5a6fd5e"
}