Endpoint · computePOSTpreflight402.com /v1/deps/version-check
Call before pinning or installing a specific package version in npm, PyPI or crates.io.
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Call before pinning or installing a specific package version in npm, PyPI or crates.io. Returns whether that exact version exists in the official registry, its publication timestamp, whether it is deprecated or yanked, its published artifact hashes, and whether an expected SRI/hex digest matches. Compares registry metadata only and never returns a safety verdict.Overview
Grade?
UNRATED
0 of 30 paid calls toward a letter
Price
$0.05 per call
Paid calls
none yet
delivery unknown until someone pays
More info
Seller?
URL
https://preflight402.com/v1/deps/version-check
Seen
first 5 days ago · last 13 hr ago
8 free handshakes
Payment
Pays through
x402
Offered on?
Base USDC
Listed on?
Base
Score, from free handshakes onlyweights 2026.09.6
UN
RATED
RATED
0.340 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 0.660: 0.460 uncertain ? + 0.200 short ? · 0.110 to D
| Component | Weight | Measured | Lower bound ? | Adds | Short ? | Uncertain ? | |
|---|---|---|---|---|---|---|---|
| livenesscosts the most it answered at all |
0.60 | 1.00 | 0.233 | 0.140 | 0 | −0.460 | |
| latency p95 it answered as fast as its class |
0.20 | 0.00 | 0.000 | 0.000 | −0.200 | 0 | |
| price stability the price stayed where it was listed |
0.20 | 1.00 | 1.000 | 0.200 | 0 | 0 | |
| Composite | 1.00 | 0.340 | gap to 1.000 = 0.660 · 0.200 short · 0.460 uncertain | 0.340 | −0.200 | −0.460 |
Not measured: correctness · nobody paid; honesty · nobody paid; schema conformance · no answer had a published shape to check
The multiplication, written out
0.600 × 0.233 liveness
+ 0.200 × 0.000 latency p95
+ 0.200 × 1.000 price stability
= 0.340 → UNRATED: 8 of 30 paid calls weights 2026.09.6 · 8 samples · seed cap_01M3NV26WJX0XSKD0QWGA69FNG|2026-09-04T03:30:15.591Z|2026.09.6
Verify it yourself
npx teppi-check https://preflight402.com/v1/deps/version-checkcurl -s https://api.teppi.xyz/v1/trust/cap_01M3NV26WJX0XSKD0QWGA69FNG