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x402 Echo Preflight Oracle
x402
x402 Echo Preflight Oracle is a paid API for AI agents from home.chrz.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).
Echoes back a client payload alongside live x402 payment requirements and authorization proof for Solana/Base mainnet agent wallet preflight checks.
Price / call$0.01
Success—
StatusUnknown
How this service works
x402-paid Solana mainnet wallet preflight oracle for agents.
Output
Returns a JSON object confirming the echo (ok: true), the original client payload echoed back, a full x402 version 2 payment_payload with authorization string, and payment_requirements specifying the USDC asset address on Base (eip155:8453), the required amount (10000 units = $0.01 USDC), and the network identifier.
Example use cases
Agent wallet preflight before deployment
“Before I deploy my AI agent to production, can you run an x402 echo preflight check to confirm my wallet can authorize USDC micropayments on Base mainnet and the payment payload comes back valid?”
Debugging x402 payment handshake
“My agent keeps failing on x402 payment steps — can you fire a test echo call with a note payload to see what the payment requirements and authorization look like, so I can compare against what my agent is sending?”
Verifying x402 version 2 compatibility
“I need to confirm my integration is compatible with x402 version 2 — can you send an echo test and show me the full payment_payload and payment_requirements the server returns for Base mainnet USDC?”
Technical details
Endpoint
POSThttps://home.chrz.dev/agent-dust/v1/agent/x402-echoWhen to prefer
Choose this endpoint when you need to preflight-test an AI agent's x402 micropayment capability against a real mainnet endpoint before integrating with production paid APIs. It is the canonical echo/smoke-test for x402 protocol compliance, particularly for agents using USDC on Base (eip155:8453). Prefer this over mock or testnet endpoints when you need to validate real authorization payloads and payment requirement structures.
Side effects
- Missing or invalid x402 payment header returns 402 Payment Required with updated payment requirements
- Insufficient USDC balance causes payment authorization failure
- Wrong network (non-Base) payment rejected
- Malformed JSON body causes 400 Bad Request
- Expired payment authorization token causes re-authentication requirement
Output
Schema · Response
{
"type": "json",
"example": {
"ok": true,
"echo": {
"note": "client test"
},
"payment_payload": {
"payload": {
"authorization": "..."
},
"x402Version": 2
},
"payment_requirements": {
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"amount": "10000",
"network": "eip155:8453"
}
}
}Tags
x402
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