Endpoint · onchainGETbiosfera.46-62-215-147.sslip.io /o/erc721-owner ?chain=ethereum&contract=0xBC4CA0EdA7647A8aB7C2061c2E118A18a936f13D&token_id=1
Use when you need the current owner of an ERC-721 token id on Base, Ethereum, Arbitrum, Optimism or Polygon via ownerOf, plus the collection's name and symbol.
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Use when you need the current owner of an ERC-721 token id on Base, Ethereum, Arbitrum, Optimism or Polygon via ownerOf, plus the collection's name and symbol. Returns exists=false if the id has no owner.Overview
Grade?
UNRATED
0 of 30 paid calls toward a letter
Price
$0.0015 per call
Paid calls
none yet
delivery unknown until someone pays
More info
Seller?
URL
https://biosfera.46-62-215-147.sslip.io/o/erc721-owner?chain=ethereum&contract=0xBC4CA0EdA7647A8aB7C2061c2E118A18a936f13D&token_id=1
Seen
first 9 days ago · last 5 days ago
12 free handshakes
Payment
Pays through
x402
Offered on?
Polygon, Base USDC
Listed on?
Polygon, Base
Score, from free handshakes onlyweights 2026.09.6
UN
RATED
RATED
0.217 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 0.783: 0.449 uncertain ? + 0.334 short ? · 0.233 to D
| Component | Weight | Measured | Lower bound ? | Adds | Short ? | Uncertain ? | |
|---|---|---|---|---|---|---|---|
| livenesscosts the most it answered at all |
0.60 | 0.78 | 0.028 | 0.017 | −0.134 | −0.449 | |
| 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 | 0.217 | gap to 1.000 = 0.783 · 0.334 short · 0.449 uncertain | 0.217 | −0.334 | −0.449 |
Not measured: correctness · nobody paid; honesty · nobody paid; schema conformance · no answer had a published shape to check
The multiplication, written out
0.600 × 0.028 liveness
+ 0.200 × 0.000 latency p95
+ 0.200 × 1.000 price stability
= 0.217 → UNRATED: 9 of 30 paid calls weights 2026.09.6 · 9 samples · seed cap_01M3BHH6YT11GEA63627DR5SB9|2026-08-30T23:24:54.872Z|2026.09.6
Verify it yourself
npx teppi-check https://biosfera.46-62-215-147.sslip.io/o/erc721-owner?chain=ethereum&contract=0xBC4CA0EdA7647A8aB7C2061c2E118A18a936f13D&token_id=1curl -s https://api.teppi.xyz/v1/trust/cap_01M3BHH6YT11GEA63627DR5SB9