Endpoint · evidenceGETwallet-services-poc-clean.3hz-services.workers.dev/fx-rate?base=EUR&quote=USD

Daily reference foreign-exchange rate for any supported fiat currency pair using Frankfurter/ECB reference data.

Daily reference foreign-exchange rate for any supported fiat currency pair using Frankfurter/ECB reference data. Query base and quote ISO 4217 codes. For conversion, normalization, accounting and reporting; not live trading data.

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?

0xeb0f642c…532b0f5e

URL

https://wallet-services-poc-clean.3hz-services.workers.dev/fx-rate?base=EUR&quote=USD

Seen

first 16 days ago · last 17 hr ago

29 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

0.824 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 0.176: 0.176 uncertain ? + 0.000 short ? · 0.076 to A

How the composite of 0.824 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	0.707		0.424	0	−0.176
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		0.824	gap to 1.000 = 0.176 · 0.000 short · 0.176 uncertain	0.824	−0.000	−0.176

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

The multiplication, written out

  0.600 × 0.707   liveness       
+ 0.200 × 1.000   latency p95    
+ 0.200 × 1.000   price stability
= 0.824           → UNRATED: 21 of 30 paid calls      weights 2026.09.6 · 21 samples · seed cap_01M2SGNCR6AA8XPH1HQ68KXY7S|2026-08-30T02:46:58.837Z|2026.09.6

Verify it yourselfnpx teppi-check https://wallet-services-poc-clean.3hz-services.workers.dev/fx-rate?base=EUR&quote=USDcurl -s https://api.teppi.xyz/v1/trust/cap_01M2SGNCR6AA8XPH1HQ68KXY7S