Endpoint · evidenceGEToffercheck.offercheck.workers.dev /v1/verify/offer ?url=https%3A%2F%2Fshop.example.com%2Fproducts%2Fwidget
Verify the live price and availability of a product at a URL before you buy or quote it.
Read more
Verify the live price and availability of a product at a URL before you buy or quote it. Fetches the page now, extracts price/currency/availability from JSON-LD, Shopify JSON, OpenGraph or microdata, and returns evidence (method, snippet, content hash, fetch time) plus a confidence score. $0.01 per check.Overview
Grade?
UNRATED
0 of 30 paid calls toward a letter
Price
$0.01 per call
Paid calls
none yet
delivery unknown until someone pays
More info
Seller?
URL
https://offercheck.offercheck.workers.dev/v1/verify/offer?url=https%3A%2F%2Fshop.example.com%2Fproducts%2Fwidget
Seen
first 7 days ago · last 14 hr ago
12 free handshakes
Payment
Pays through
x402
Offered on?
Base USDC
Listed on?
Base
Score, from free handshakes onlyweights 2026.09.6
UN
RATED
RATED
0.507 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 0.493: 0.335 uncertain ? + 0.158 short ? · 0.143 to C
| Component | Weight | Measured | Lower bound ? | Adds | Short ? | Uncertain ? | |
|---|---|---|---|---|---|---|---|
| livenesscosts the most it answered at all |
0.60 | 1.00 | 0.442 | 0.265 | 0 | −0.335 | |
| latency p95 it answered as fast as its class |
0.20 | 0.21 | 0.209 | 0.042 | −0.158 | 0 | |
| price stability the price stayed where it was listed |
0.20 | 1.00 | 1.000 | 0.200 | 0 | 0 | |
| Composite | 1.00 | 0.507 | gap to 1.000 = 0.493 · 0.158 short · 0.335 uncertain | 0.507 | −0.158 | −0.335 |
Not measured: correctness · nobody paid; honesty · nobody paid; schema conformance · no answer had a published shape to check
The multiplication, written out
0.600 × 0.442 liveness
+ 0.200 × 0.209 latency p95
+ 0.200 × 1.000 price stability
= 0.507 → UNRATED: 11 of 30 paid calls weights 2026.09.6 · 11 samples · seed cap_01M3GP83V977PHEVTXJGAJPJ5J|2026-09-03T19:06:19.953Z|2026.09.6
Verify it yourself
npx teppi-check https://offercheck.offercheck.workers.dev/v1/verify/offer?url=https%3A%2F%2Fshop.example.com%2Fproducts%2Fwidgetcurl -s https://api.teppi.xyz/v1/trust/cap_01M3GP83V977PHEVTXJGAJPJ5J