Endpoint · computeGETmacropulse.theaslangroupllc.com /api/fx/convert
Convert an amount between currencies at the official European Central Bank reference rate.
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Convert an amount between currencies at the official European Central Bank reference rate. Answers "what is the USD to EUR exchange rate", "convert 250 GBP to JPY", "what was the EUR/USD FX rate on 2024-03-15". Multi-currency in one call (to=EUR,GBP,JPY), 30+ currencies, historical daily fixings back to 1999. Deterministic and cacheable: real ECB data, not a model estimate — identical inputs always return the identical rate. Keyless, sub-second.Overview
Grade?
UNRATED
0 of 30 paid calls toward a letter
Price
$0.005 per call
Paid calls
none yet
delivery unknown until someone pays
More info
Seller?
URL
https://macropulse.theaslangroupllc.com/api/fx/convert
Seen
first 34 days ago · last 18 days ago
46 free handshakes
Payment
Pays through
x402
Offered on?
algorand:wGHE2Pwdvd7S12BL5FaOP20EGYesN73k, Polygon, eip155:143, eip155:196, Arbitrum, Robinhood Chain, eip155:480, eip155:56, Base USDC, eip155:999, Solana, xrpl:0
Listed on?
Polygon, Arbitrum, Base, Solana
Score, from free handshakes onlyweights 2026.09.4
UN
RATED
RATED
0.720 liveness verified, no letter
To a letter · 30 paid calls
0 of 30
Held down by latency p95 · gap to 1.000 is 0.280: 0.080 uncertain ? + 0.200 short ? · 0.080 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 | 0.866 | 0.520 | 0 | −0.080 | |
| price stability the price stayed where it was listed |
0.20 | 1.00 | 1.000 | 0.200 | 0 | 0 | |
| Composite | 1.00 | 0.720 | gap to 1.000 = 0.280 · 0.200 short · 0.080 uncertain | 0.720 | −0.200 | −0.080 |
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 × 0.866 liveness
+ 0.200 × 1.000 price stability
= 0.720 → UNRATED: 46 of 30 paid calls weights 2026.09.4 · 46 samples · seed cap_01M1A59M15V3Z11GWAHFHGJ6N7|2026-08-24T05:26:41.620Z|2026.09.4
Verify it yourself
npx teppi-check https://macropulse.theaslangroupllc.com/api/fx/convertcurl -s https://api.teppi.xyz/v1/trust/cap_01M1A59M15V3Z11GWAHFHGJ6N7