Endpoint · lookupPOSTapi.jpverify.com /jp-address/postal-lookup
Japanese postal-code lookup and reverse lookup.
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Japanese postal-code lookup and reverse lookup. Keywords: Japanese postal lookup, Japan Post postal code, postal code reverse lookup, 日本郵便番号検索. Use a postal code or prefecture/city/ward/town components against the local Japan Post snapshot. / 通过邮编或都道府县、市区町村、区、町名字段，在本地 Japan Post 数据中进行日本邮编反查。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.jpverify.com/jp-address/postal-lookup
Seen
first 35 days ago · last 14 hr ago
52 free handshakes
Payment
Pays through
x402
Offered on?
Base USDC
Listed on?
Base
Score, from free handshakes onlyweights 2026.09.6
UN
RATED
RATED
0.221 liveness verified, no letter
To a letter · 30 paid calls
0 of 30
Held down by liveness · gap to 1.000 is 0.779: 0.039 uncertain ? + 0.740 short ? · 0.229 to D
| Component | Weight | Measured | Lower bound ? | Adds | Short ? | Uncertain ? | |
|---|---|---|---|---|---|---|---|
| livenesscosts the most it answered at all |
0.60 | 0.10 | 0.035 | 0.021 | −0.540 | −0.039 | |
| 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 | 0.221 | gap to 1.000 = 0.779 · 0.740 short · 0.039 uncertain | 0.221 | −0.740 | −0.039 |
Not measured: correctness · nobody paid; honesty · nobody paid; schema conformance · no answer had a published shape to check
The multiplication, written out
0.600 × 0.035 liveness
+ 0.200 × 0.000 latency p95
+ 0.200 × 1.000 price stability
= 0.221 → UNRATED: 46 of 30 paid calls weights 2026.09.6 · 46 samples · seed cap_01M1A59S885J26W6YR4H2WAW2M|2026-09-03T10:11:11.115Z|2026.09.6
Verify it yourself
npx teppi-check https://api.jpverify.com/jp-address/postal-lookupcurl -s https://api.teppi.xyz/v1/trust/cap_01M1A59S885J26W6YR4H2WAW2M