MEV block payment lookup
x402Grade CLast checked 1 hour ago
POST https://agent402.tools/api/mev-block-payment
Look up the MEV-Boost payment for a specific slot or block number via the Flashbots relay. Returns the builder, proposer, value paid in ETH, gas usage, and tx count. Returns found=false if the block was built locally or via a different MEV-Boost relay (Flashbots is one of several).
Price$0.002per chain read · paid in USD on Solana
Uptime100%
4/4 probes · 377.5 ms
Score66Grade C
Paid usage, 30 days0payers · 0 calls
Warnings
Wallet mismatch The payout wallet in its live payment answer differs from its catalogue listing on the same network.
How to buy
This endpoint takes pay-per-call payments over x402. Call it once without paying to see its live price; any x402 client then pays and retries automatically.
curl -i -X POST "https://agent402.tools/api/mev-block-payment"
# HTTP/1.1 402 Payment Required: price, asset and payTo are in the responseRecent checks
| Checked (UTC) | Result | Status | Time | Live price |
|---|---|---|---|---|
| 2026-10-11 10:01 | Valid 402 | 402 | 731 ms | $0.002 |
| 2026-10-11 05:46 | Valid 402 | 402 | 411 ms | $0.002 |
| 2026-10-11 01:15 | Valid 402 | 402 | 344 ms | $0.002 |
| 2026-10-10 20:45 | Valid 402 | 402 | 274 ms | $0.002 |
Receipts
No test purchases yet. Graded test purchases are next on our list; until then every number here comes from unpaid checks.
What a check proves