Endpoint · market dataGETapi.xynaptic.io /v1/fiat-usdc-rate
Xynaptic Fiat-USDC Rate — best fiat↔USDC conversion rate per payment rail (Base, Polygon, Solana): live Coinbase spot EUR/USD with bid-ask spread, estimated network fees, slippage…
Read more
Xynaptic Fiat-USDC Rate — best fiat↔USDC conversion rate per payment rail (Base, Polygon, Solana): live Coinbase spot EUR/USD with bid-ask spread, estimated network fees, slippage hint and best-rail verdict for agents settling in USDC. GET (?currency=EUR).Overview
Grade?
UNRATED
0 of 30 paid calls toward a letter
Price
$0.02 per call
Paid calls
none yet
delivery unknown until someone pays
More info
Seller?
URL
https://api.xynaptic.io/v1/fiat-usdc-rate
Seen
first 2 days ago · last 2 days ago
4 free handshakes
Payment
Pays through
x402
Offered on?
Polygon, Base USDC, Solana mainnet
Listed on?
Polygon, Base
Score, from free handshakes onlyweights 2026.09.6
UN
RATED
RATED
0.400 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 0.600: 0.600 uncertain ? + 0.000 short ? · 0.050 to D
| Component | Weight | Measured | Lower bound ? | Adds | Short ? | Uncertain ? | |
|---|---|---|---|---|---|---|---|
| livenesscosts the most it answered at all |
0.60 | 1.00 | 0.000 | 0.000 | 0 | −0.600 | |
| 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 | 0.400 | gap to 1.000 = 0.600 · 0.000 short · 0.600 uncertain | 0.400 | −0.000 | −0.600 |
Not measured: correctness · nobody paid; honesty · nobody paid; schema conformance · no answer had a published shape to check
The multiplication, written out
0.600 × 0.000 liveness
+ 0.200 × 1.000 latency p95
+ 0.200 × 1.000 price stability
= 0.400 → UNRATED: 2 of 30 paid calls weights 2026.09.6 · 2 samples · seed cap_01M3XJCGDBBKZ8QJ2Q6SJXW45M|2026-09-03T00:13:14.175Z|2026.09.6
Verify it yourself
npx teppi-check https://api.xynaptic.io/v1/fiat-usdc-ratecurl -s https://api.teppi.xyz/v1/trust/cap_01M3XJCGDBBKZ8QJ2Q6SJXW45M