Endpoint · lookupPOSTpostcode-api-production.up.railway.app /lookup/nearest
Find UK postcodes within a radius (100-2000m) of a lat/lng, each with its distance in metres from the query point.
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://postcode-api-production.up.railway.app/lookup/nearest
Seen
first 34 days ago · last 7 days ago
63 free handshakes
Payment
Pays through
x402
Offered on?
Base USDC
Listed on?
Base
Score, from free handshakes onlyweights 2026.09.6
UN
RATED
RATED
0.775 liveness verified, no letter
To a letter · 30 paid calls
0 of 30
Held down by latency p95 · gap to 1.000 is 0.225: 0.073 uncertain ? + 0.152 short ? · 0.025 to B
| Component | Weight | Measured | Lower bound ? | Adds | Short ? | Uncertain ? | |
|---|---|---|---|---|---|---|---|
| latency p95costs the most it answered as fast as its class |
0.20 | 0.34 | 0.277 | 0.055 | −0.133 | −0.012 | |
| liveness it answered at all |
0.60 | 0.97 | 0.866 | 0.519 | −0.019 | −0.062 | |
| price stability the price stayed where it was listed |
0.20 | 1.00 | 1.000 | 0.200 | 0 | 0 | |
| Composite | 1.00 | 0.775 | gap to 1.000 = 0.225 · 0.152 short · 0.073 uncertain | 0.775 | −0.152 | −0.073 |
Not measured: correctness · nobody paid; honesty · nobody paid; schema conformance · no answer had a published shape to check
The multiplication, written out
0.200 × 0.277 latency p95
+ 0.600 × 0.866 liveness
+ 0.200 × 1.000 price stability
= 0.775 → UNRATED: 56 of 30 paid calls weights 2026.09.6 · 56 samples · seed cap_01M1A5AHNFBNS1MZDAH4ST0MM7|2026-09-03T11:45:07.927Z|2026.09.6
Verify it yourself
npx teppi-check https://postcode-api-production.up.railway.app/lookup/nearestcurl -s https://api.teppi.xyz/v1/trust/cap_01M1A5AHNFBNS1MZDAH4ST0MM7