Endpoint · computeGETapi.duoleads.com /v1/chain/selector ?signature=transfer%28address%2Cuint256%29
Compute the Keccak-256 hash of a Solidity function or event signature and derive the 4-byte function selector and the 32-byte event topic.
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Compute the Keccak-256 hash of a Solidity function or event signature and derive the 4-byte function selector and the 32-byte event topic. Normalises the signature first — strips parameter names, expands uint to uint256 and the other aliases, flattens tuples — so a signature copied from source code produces the same selector as the canonical form. Also hashes arbitrary text or hex bytes with Keccak-256.Overview
Grade?
UNRATED
0 of 30 paid calls toward a letter
Price
$0.05 per call
Paid calls
none yet
delivery unknown until someone pays
More info
Seller?
URL
https://api.duoleads.com/v1/chain/selector?signature=transfer%28address%2Cuint256%29
MCP server on this host: com.duoleads.api/data-utilities
Seen
first 5 days ago · last 11 hr ago
8 free handshakes
Payment
Pays through
x402
Offered on?
Base USDC
Listed on?
Base
Score, from free handshakes onlyweights 2026.09.6
UN
RATED
RATED
0.340 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 0.660: 0.460 uncertain ? + 0.200 short ? · 0.110 to D
| Component | Weight | Measured | Lower bound ? | Adds | Short ? | Uncertain ? | |
|---|---|---|---|---|---|---|---|
| livenesscosts the most it answered at all |
0.60 | 1.00 | 0.233 | 0.140 | 0 | −0.460 | |
| 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 | 0.340 | gap to 1.000 = 0.660 · 0.200 short · 0.460 uncertain | 0.340 | −0.200 | −0.460 |
Not measured: correctness · nobody paid; honesty · nobody paid; schema conformance · no answer had a published shape to check
The multiplication, written out
0.600 × 0.233 liveness
+ 0.200 × 0.000 latency p95
+ 0.200 × 1.000 price stability
= 0.340 → UNRATED: 8 of 30 paid calls weights 2026.09.6 · 8 samples · seed cap_01M3NV24VYHGQZGJ88E1J502E5|2026-09-04T02:59:10.018Z|2026.09.6
Verify it yourself
npx teppi-check https://api.duoleads.com/v1/chain/selector?signature=transfer%28address%2Cuint256%29curl -s https://api.teppi.xyz/v1/trust/cap_01M3NV24VYHGQZGJ88E1J502E5