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 the…

Identify which carrier issued a tracking number using a deterministic, versioned signature set - prefixes, lengths, carrier check digits and UPU S10 structure - returning the carrier, how distinctive the match is, every ranked candidate with typed evidence, and the parsed S10 details. No upstream call and no carrier account required. Use when: Which carrier is this tracking number from?

UNRATEDListed

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?

0x9d6b6fdb…f6083c8f

URL

https://api.eckari.com/v1/parcels/detect-carrier?tracking_number=1Z+879E93+03+4683+4440

MCP server on this host: com.eckari/capabilities

Seen

first 35 days ago · last 16 hr ago

65 free handshakes

Payment

Pays through

x402

Offered on?

Base USDC

Listed on?

Base

Score, from free handshakes onlyweights 2026.09.6

UN
RATED

0.735 liveness verified, no letter

To a letter · 30 paid calls

0 of 30

Held down by latency p95 · gap to 1.000 is 0.265: 0.065 uncertain ? + 0.200 short ? · 0.065 to B

How the composite of 0.735 is made up, part by part
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	0.892		0.535	0	−0.065
price stability the price stayed where it was listed	0.20	1.00	1.000		0.200	0	0
Composite	1.00		0.735	gap to 1.000 = 0.265 · 0.200 short · 0.065 uncertain	0.735	−0.200	−0.065

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 × 0.892   liveness       
+ 0.200 × 1.000   price stability
= 0.735           → UNRATED: 57 of 30 paid calls      weights 2026.09.6 · 57 samples · seed cap_01M1A59PWHNQ0HHH6V0V9YWRF8|2026-09-03T18:34:37.187Z|2026.09.6

Verify it yourselfnpx teppi-check https://api.eckari.com/v1/parcels/detect-carrier?tracking_number=1Z+879E93+03+4683+4440curl -s https://api.teppi.xyz/v1/trust/cap_01M1A59PWHNQ0HHH6V0V9YWRF8