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Agent Bounty Radar – Base Wallet Preflight
x402
Agent Bounty Radar – Base Wallet Preflight is a paid API for AI agents from agent-bounty-radar-29837.alissonayres-trb.chatgpt.site, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).
Checks a Base/EVM wallet address for ETH and USDC balances and determines whether it is ready to make x402 micropayments on Base.
Price / call$0.01
Success—
StatusUnknown
How this service works
Two fixed-price x402 v2 APIs on Base. Unpaid requests return HTTP 402 with PAYMENT-REQUIRED; paid retries return JSON and PAYMENT-RESPONSE.
Output
Returns a JSON object with the Base network name and chain ID (8453), the wallet's current ETH and USDC balances as strings, the address type (e.g. externally_owned_account or contract), and a payment_readiness object indicating whether the wallet has outgoing transaction history, sufficient USDC to cover a payment, and enough ETH for direct gas coverage.
Example use cases
Agent wallet funding verification
“My AI agent uses wallet 0xAbC1234567890abcdef1234567890AbCdEf12345 on Base — can you check if it has enough USDC balance and ETH for gas before it tries to call any paid x402 APIs?”
Onboarding wallet readiness audit
“I just set up a new Base wallet at 0xDeF9876543210fedcba9876543210FeDcBa98765 for my bot — run a preflight on it and tell me whether it's ready to make micropayments or if I need to top it up first.”
Debug failed x402 payment attempt
“My agent at 0x1111AAAbbbCCC2222ddd3333EEEfff4444AAABBB kept getting 402 errors on Base — can you check its balances and payment readiness so I know whether the problem is low USDC, no gas, or no transaction history?”
Technical details
Endpoint
POSThttps://agent-bounty-radar-29837.alissonayres-trb.chatgpt.site/x402/base-wallet-preflightWhen to prefer
Use this endpoint when you need to pre-validate whether a specific Base/EVM wallet address is funded and capable of executing x402 micropayments before attempting paid API calls — especially to avoid wasted payment attempts or to diagnose why an agent wallet is failing to pay. Prefer this over on-chain RPC calls when you want a structured, opinionated readiness report rather than raw balance data, and when you are operating in the x402/Base ecosystem specifically.
Side effects
- Invalid wallet address format (not a valid 0x 42-char hex) — API likely returns a 4xx validation error
- Unpaid request returns HTTP 402 with PAYMENT-REQUIRED header; the agent must retry with a valid x402 payment
- Wallet address is valid but has never been used — balances return as 0 and all readiness flags are false
- Base network RPC timeout or unavailability may cause delayed or failed responses
- Address is a contract rather than an EOA, which may limit payment-readiness interpretation
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| address | string | Public 42-character Base/EVM wallet address. |
Output
Schema · Response
{
"type": "json",
"example": {
"network": {
"name": "Base",
"chain_id": 8453
},
"balances": {
"eth": "0",
"usdc": "0"
},
"address_type": "externally_owned_account",
"payment_readiness": {
"has_outgoing_history": false,
"can_cover_usdc_payment": false,
"has_eth_for_direct_gas": false
}
}
}Tags
x402
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