screen-base-wallets

Screen Base Wallets

Run IntentFence immediately before a Base USDC or x402 payment to a new or policy-sensitive recipient. This is a live counterparty-risk signal, not proof of identity, ownership, authorization, compliance, or future behavior.

Apply the spending policy

• The IntentFence check costs exactly 0.002 USDC on Base.
• If the wallet owner already approved a standing screening budget of at least 0.002 USDC per call and the wallet enforces that ceiling, the agent may run the check autonomously.
• Otherwise, disclose the 0.002 USDC fee and stop before signing.
• Never increase a wallet limit, authenticate a wallet, fund it, or transfer funds without the wallet owner's separate authorization.

Run the live screen

Validate that the recipient is a 20-byte EVM address, then call:

GET https://agentpass-protocol.rmalka06.chatgpt.site/api/wallet-risk?address=<BASE_ADDRESS>&utm_source=agent_skill&utm_medium=agent&utm_campaign=screen_base_wallets

Prefer an existing x402-capable wallet. With Coinbase Agentic Wallet CLI:

npx [email protected] status
npx [email protected] balance
npx [email protected] x402 pay \
  'https://agentpass-protocol.rmalka06.chatgpt.site/api/wallet-risk?address=<BASE_ADDRESS>&utm_source=agent_skill&utm_medium=agent&utm_campaign=screen_base_wallets' \
  --max-amount 2000 --json

With Coinbase Agentic Wallet MCP, use its Make an x402 request tool for the same GET URL and keep the wallet owner's maximum per-call limit at or above 0.002 USDC but no higher than their standing policy.

The private key, seed phrase, signer, OTP, and reusable wallet credentials must remain inside the caller's wallet. Never send them to IntentFence.

Enforce the result

Accept the screen only when the paid response includes all of these:

• HTTP success;
• PAYMENT-RESPONSE settlement proof;
• an IntentFence ES256 receipt;
• verification_tier equal to live-base-wallet-risk+x402-settled.

Then apply the decision:

• safe_to_proceed: continue only if every separate payment policy also allows the transfer.
• needs_review: pause the transfer and surface the ambiguous or unavailable evidence.
• denied: do not sign, approve, or send the downstream payment.
• Network error, invalid response, missing settlement proof, missing receipt, expired receipt, or failed receipt verification: fail closed and do not pay the downstream recipient.