Endpoint · market dataGETx402engine.app /api/crypto/history ?currency=usd&days=30&id=bitcoin&interval=daily
Historical price, market cap, and volume data for any coin
Overview
Grade?
UNRATED
0 of 30 paid calls toward a letter
Price
$0.003 per call
Paid calls
none yet
delivery unknown until someone pays
More info
Seller?
URL
https://x402engine.app/api/crypto/history?currency=usd&days=30&id=bitcoin&interval=daily
Seen
first 35 days ago · last 17 days ago
48 free handshakes
Payment
Pays through
x402
Offered on?
eip155:4326, Base USDC, Solana
Listed on?
Base, Solana
Score, from free handshakes onlyweights 2026.09.4
UN
RATED
RATED
0.723 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 0.277: 0.160 uncertain ? + 0.117 short ? · 0.077 to B
| Component | Weight | Measured | Lower bound ? | Adds | Short ? | Uncertain ? | |
|---|---|---|---|---|---|---|---|
| latency p95costs the most it answered as fast as its class |
0.20 | 0.42 | 0.000 | 0.000 | −0.117 | −0.083 | |
| liveness it answered at all |
0.60 | 1.00 | 0.872 | 0.523 | 0 | −0.077 | |
| price stability the price stayed where it was listed |
0.20 | 1.00 | 1.000 | 0.200 | 0 | 0 | |
| Composite | 1.00 | 0.723 | gap to 1.000 = 0.277 · 0.117 short · 0.160 uncertain | 0.723 | −0.117 | −0.160 |
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 × 0.872 liveness
+ 0.200 × 1.000 price stability
= 0.723 → UNRATED: 48 of 30 paid calls weights 2026.09.4 · 48 samples · seed cap_01M1A5QEACE9H30FK4WYPHN5C5|2026-08-25T23:14:11.053Z|2026.09.4
Verify it yourself
npx teppi-check https://x402engine.app/api/crypto/history?currency=usd&days=30&id=bitcoin&interval=dailycurl -s https://api.teppi.xyz/v1/trust/cap_01M1A5QEACE9H30FK4WYPHN5C5