Endpoint · extractionGETapi-staging.eckari.com /v1/parcels/detect-carrier ?tracking_number=1Z+879E93+03+4683+4440
Identify which carrier issued a tracking number using a deterministic, versioned signature set - prefixes, lengths, carrier check digits and UPU S10 structure - returning ranked…
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Identify which carrier issued a tracking number using a deterministic, versioned signature set - prefixes, lengths, carrier check digits and UPU S10 structure - returning ranked candidates with the reasons each matched, the parsed S10 details and a rule-based (uncalibrated) confidence. No upstream call and no carrier account required. Use when: Which carrier is this tracking number from?Overview
Grade?
UNRATED
0 of 30 paid calls toward a letter
Price
$0.001 per call
Paid calls
none yet
delivery unknown until someone pays
More info
Seller?
URL
https://api-staging.eckari.com/v1/parcels/detect-carrier?tracking_number=1Z+879E93+03+4683+4440
Seen
first 34 days ago · last 17 days ago
49 free handshakes
Payment
Pays through
x402
Offered on?
Base Sepolia USDC
Listed on?
Base Sepolia
Score, from free handshakes onlyweights 2026.09.4
UN
RATED
RATED
0.923 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 0.077: 0.077 uncertain ? + 0.000 short ?
| Component | Weight | Measured | Lower bound ? | Adds | Short ? | Uncertain ? | |
|---|---|---|---|---|---|---|---|
| livenesscosts the most it answered at all |
0.60 | 1.00 | 0.872 | 0.523 | 0 | −0.077 | |
| 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 | 0.923 | gap to 1.000 = 0.077 · 0.000 short · 0.077 uncertain | 0.923 | −0.000 | −0.077 |
Not measured: correctness · nobody paid; honesty · nobody paid; schema conformance · no answer had a published shape to check
The multiplication, written out
0.600 × 0.872 liveness
+ 0.200 × 1.000 latency p95
+ 0.200 × 1.000 price stability
= 0.923 → UNRATED: 48 of 30 paid calls weights 2026.09.4 · 48 samples · seed cap_01M1A59SET965NBA09EY4NNVQQ|2026-08-25T15:18:23.525Z|2026.09.4
Verify it yourself
npx teppi-check https://api-staging.eckari.com/v1/parcels/detect-carrier?tracking_number=1Z+879E93+03+4683+4440curl -s https://api.teppi.xyz/v1/trust/cap_01M1A59SET965NBA09EY4NNVQQ