Endpoint · computePOSTapiacre.com /v1/data/ecb-fx-reference
Convert an amount between two supported currencies using one validated ECB daily reference-rate observation.
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Convert an amount between two supported currencies using one validated ECB daily reference-rate observation. The underlying ECB statistics are available free from the ECB Data Portal; the fee covers bounded retrieval, validation, clearly labelled cross-rate calculation, and x402 delivery.Overview
Grade?
UNRATED
0 of 30 paid calls toward a letter
Price
$0.002 per call
Paid calls
none yet
delivery unknown until someone pays
More info
Seller?
Seen
first 35 days ago · last 17 hr ago
64 free handshakes
Payment
Pays through
x402
Offered on?
Base USDC, Solana
Listed on?
Base, Solana
Score, from free handshakes onlyweights 2026.09.6
UN
RATED
RATED
0.735 liveness verified, no letter
To a letter · 30 paid calls
0 of 30
Held down by latency p95 · gap to 1.000 is 0.265: 0.065 uncertain ? + 0.200 short ? · 0.065 to B
| Component | Weight | Measured | Lower bound ? | Adds | Short ? | Uncertain ? | |
|---|---|---|---|---|---|---|---|
| latency p95costs the most it answered as fast as its class |
0.20 | 0.00 | 0.000 | 0.000 | −0.200 | 0 | |
| liveness it answered at all |
0.60 | 1.00 | 0.892 | 0.535 | 0 | −0.065 | |
| price stability the price stayed where it was listed |
0.20 | 1.00 | 1.000 | 0.200 | 0 | 0 | |
| Composite | 1.00 | 0.735 | gap to 1.000 = 0.265 · 0.200 short · 0.065 uncertain | 0.735 | −0.200 | −0.065 |
Not measured: correctness · nobody paid; honesty · nobody paid; schema conformance · no answer had a published shape to check
The multiplication, written out
0.200 × 0.000 latency p95
+ 0.600 × 0.892 liveness
+ 0.200 × 1.000 price stability
= 0.735 → UNRATED: 57 of 30 paid calls weights 2026.09.6 · 57 samples · seed cap_01M1A59WQG01HS4BTHGTKFH5NS|2026-09-03T00:44:19.780Z|2026.09.6
Verify it yourself
npx teppi-check https://apiacre.com/v1/data/ecb-fx-referencecurl -s https://api.teppi.xyz/v1/trust/cap_01M1A59WQG01HS4BTHGTKFH5NS