fx-rates?base=EUR&quote=USD

Daily euro FX reference rates from the European Central Bank.

Daily euro FX reference rates from the European Central Bank. ?base (default EUR), ?quote for a single rate, ?date=YYYY-MM-DD for history (last 90 ECB business days; older dates 404). Non-EUR bases are cross-rates derived via EUR (quote-per-EUR ÷ base-per-EUR). Weekend/holiday dates resolve to the last published ECB day — the date field says which. Published ~16:00 CET on ECB business days; informational rates, not for transaction pricing.

UNRATEDListed

Overview

Grade?

UNRATED

0 of 30 paid calls toward a letter

Price

$0.001 per call

Paid calls

none yet

delivery unknown until someone pays

More info

Seller?

0xc55a2d53…71f9c291

URL

https://staging.402utils.com/v1/fx-rates?base=EUR&quote=USD

Seen

first 11 days ago · last 19 hr ago

18 free handshakes

Payment

Pays through

x402

Offered on?

Base Sepolia USDC

Listed on?

Base Sepolia

Score, from free handshakes onlyweights 2026.09.6

UN
RATED

0.378 liveness verified, no letter

To a letter · 30 paid calls

0 of 30

Held down by liveness · gap to 1.000 is 0.622: 0.256 uncertain ? + 0.366 short ? · 0.072 to D

How the composite of 0.378 is made up, part by part
Component	Weight	Measured	Lower bound ?		Adds	Short ?	Uncertain ?
livenesscosts the most it answered at all	0.60	0.72	0.297		0.178	−0.166	−0.256
latency p95 it answered as fast as its class	0.20	0.00	0.000		0.000	−0.200	0
price stability the price stayed where it was listed	0.20	1.00	1.000		0.200	0	0
Composite	1.00		0.378	gap to 1.000 = 0.622 · 0.366 short · 0.256 uncertain	0.378	−0.366	−0.256

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

The multiplication, written out

  0.600 × 0.297   liveness       
+ 0.200 × 0.000   latency p95    
+ 0.200 × 1.000   price stability
= 0.378           → UNRATED: 18 of 30 paid calls      weights 2026.09.6 · 18 samples · seed cap_01M36CNNFNVYQF7XN85C1AVXGJ|2026-09-04T08:13:23.127Z|2026.09.6

Verify it yourselfnpx teppi-check https://staging.402utils.com/v1/fx-rates?base=EUR&quote=USDcurl -s https://api.teppi.xyz/v1/trust/cap_01M36CNNFNVYQF7XN85C1AVXGJ