chain-block

Fetch a block header by number, hash, or "latest" on Ethereum, Base, Arbitrum, Optimism, Polygon, or BNB Chain: timestamp, miner, gas used/limit, base fee, transaction count, size.

Fetch a block header by number, hash, or "latest" on Ethereum, Base, Arbitrum, Optimism, Polygon, or BNB Chain: timestamp, miner, gas used/limit, base fee, transaction count, size. Public JSON-RPC, no API keys. POST a JSON body like: {"chain":"base","block":"latest"}

UNRATEDListed

Overview

Grade?

UNRATED

0 of 30 paid calls toward a letter

Price

$0.003 per call

Paid calls

none yet

delivery unknown until someone pays

More info

Seller?

0xb86f95ef…9b478fc4

URL

https://keyronne.com/api/chain-block

Seen

first 35 days ago · last 17 hr ago

64 free handshakes

Payment

Pays through

x402

Offered on?

Base USDC

Listed on?

Base

Score, from free handshakes onlyweights 2026.09.6

UN
RATED

0.934 liveness verified, no letter

To a letter · 30 paid calls

0 of 30

Held back by sample size, not by the seller · gap to 1.000 is 0.066: 0.066 uncertain ? + 0.000 short ?

How the composite of 0.934 is made up, part by part
Component	Weight	Measured	Lower bound ?		Adds	Short ?	Uncertain ?
livenesscosts the most it answered at all	0.60	1.00	0.890		0.534	0	−0.066
latency p95 it answered as fast as its class	0.20	1.00	1.000		0.200	0	0
price stability the price stayed where it was listed	0.20	1.00	1.000		0.200	0	0
Composite	1.00		0.934	gap to 1.000 = 0.066 · 0.000 short · 0.066 uncertain	0.934	−0.000	−0.066

Not measured: correctness · nobody paid; honesty · nobody paid; schema conformance · no answer had a published shape to check

The multiplication, written out

  0.600 × 0.890   liveness       
+ 0.200 × 1.000   latency p95    
+ 0.200 × 1.000   price stability
= 0.934           → UNRATED: 56 of 30 paid calls      weights 2026.09.6 · 56 samples · seed cap_01M1A51TZ3MSN10BR16HWCXC97|2026-09-03T15:26:20.183Z|2026.09.6

Verify it yourselfnpx teppi-check https://keyronne.com/api/chain-blockcurl -s https://api.teppi.xyz/v1/trust/cap_01M1A51TZ3MSN10BR16HWCXC97