Endpoint · onchainGETapi.arysphere.com /v1/ventures/x402_eth_reads_v1/eth_mainnet_erc721_ownerof ?id=1&token=0xBC4CA0EdA7647A8aB7C2061c2E118A18a936f13D
Ethereum mainnet NFT (ERC-721) owner of a token id.
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Ethereum mainnet NFT (ERC-721) owner of a token id. Returns the owner address of an ERC-721 token on Ethereum mainnet. Takes token (contract address, 0x plus 40 hex) and id (decimal token id).Overview
Grade?
UNRATED
0 of 30 paid calls toward a letter
Price
$0.003 per call
Paid calls
none yet
delivery unknown until someone pays
More info
Seller?
URL
https://api.arysphere.com/v1/ventures/x402_eth_reads_v1/eth_mainnet_erc721_ownerof?id=1&token=0xBC4CA0EdA7647A8aB7C2061c2E118A18a936f13D
MCP server on this host: com.arysphere/arysphere-x402
Seen
first 6 days ago · last 14 hr ago
6 free handshakes
Payment
Pays through
x402
Offered on?
Polygon, Arbitrum, Base USDC
Listed on?
Polygon, Arbitrum, Base
Score, from free handshakes onlyweights 2026.09.6
UN
RATED
RATED
0.200 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 0.800: 0.600 uncertain ? + 0.200 short ? · 0.250 to D
| Component | Weight | Measured | Lower bound ? | Adds | Short ? | Uncertain ? | |
|---|---|---|---|---|---|---|---|
| livenesscosts the most it answered at all |
0.60 | 1.00 | 0.000 | 0.000 | 0 | −0.600 | |
| 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 | 0.200 | gap to 1.000 = 0.800 · 0.200 short · 0.600 uncertain | 0.200 | −0.200 | −0.600 |
Not measured: correctness · nobody paid; honesty · nobody paid; schema conformance · no answer had a published shape to check
The multiplication, written out
0.600 × 0.000 liveness
+ 0.200 × 0.000 latency p95
+ 0.200 × 1.000 price stability
= 0.200 → UNRATED: 5 of 30 paid calls weights 2026.09.6 · 5 samples · seed cap_01M546CNDVJ11F3R0XGZXKABYD|2026-09-21T19:58:40.161Z|2026.09.6
Verify it yourself
npx teppi-check https://api.arysphere.com/v1/ventures/x402_eth_reads_v1/eth_mainnet_erc721_ownerof?id=1&token=0xBC4CA0EdA7647A8aB7C2061c2E118A18a936f13Dcurl -s https://api.teppi.xyz/v1/trust/cap_01M546CNDVJ11F3R0XGZXKABYD