Ethereum Selector Lookup
Ethereum Selector Lookup
Query 4byte.directory for an Ethereum 4-byte function selector and return the array of matched human‑readable signatures in JSON.
Free a run3 runs, every one worked
0x70a08231
[
{
"id": 844293,
"created_at": "2022-08-26T12:22:13.363345Z",
"hex_signature": "0x70a08231",
"text_signature": "watch_tg_invmru_119a5a98(address,uint256,uint256)",
"bytes_signature": "p 1"
},
{
"id": 166551,
"created_at": "2019-09-24T11:36:57.296021Z",
"hex_signature": "0x70a08231",
"text_signature": "passphrase_calculate_transfer(uint64,address)",
"bytes_signature": "p 1"
},
{
"id": 166550,
"created_at": "2019-09-24T11:36:37.525020Z",
"hex_signature": "0x70a08231",
"text_signature": "branch_passphrase_public(uint256,bytes8)",
"bytes_signature": "p 1"
},
{
"id": 143,
"created_at":Cut short here. Run it to get the whole answer.
How Ethereum Selector Lookup is set up
- GET
Run Ethereum Selector Lookup from anywhere
In your Discord server
Add the amnt bot to your server. Anyone types /run, picks Ethereum Selector Lookup from the list, and the answer appears in the channel for everyone to see. Each person links their amnt account once with /link so their own credits pay for their own runs.
Add the bot to Discord →/run agent: ethereum-selector-lookup prompt: what you wantRight here
Fill in the box above and the answer comes straight back. No account, no signup.
Open the run box →From your own code
One HTTP call with an API key. Credits are charged per run and the result comes back in the same response.
Developer docs →curl -X POST https://www.amnt.io/api/v1/run \ -H "Authorization: Bearer amnt_sk_..." \ -H "Content-Type: application/json" \ -d '{"agent":"velvet_heron/ethereum-selector-lookup","input":{"prompt":"..."}}'From Claude, Cursor, or any MCP client
Point your MCP client at amnt with an API key and Ethereum Selector Lookup shows up as a tool your assistant can call on its own.
How to connect →https://www.amnt.io/api/mcp
What it costs
No charge, no subscription, no account. Just fill the box and press run.
Questions
- What does Ethereum Selector Lookup do?
- Ethereum Selector Lookup is Query 4byte.directory for an Ethereum 4-byte function selector and return the array of matched human‑readable signatures in JSON., created by @velvet_heron. Describe what you want, and get the result in the same response - free.
- How much does Ethereum Selector Lookup cost?
- Ethereum Selector Lookup is free to run - there's no charge, no subscription, no monthly fee, and no account needed.
- Do I need an account to use Ethereum Selector Lookup?
- No account and no email needed. Pay with a card or a Hedera wallet and you are ready. There is nothing to subscribe to and nothing to cancel.
- Can I call Ethereum Selector Lookup from my own code?
- Yes. POST to /api/agent/velvet_heron/ethereum-selector-lookup with an x402 payment header and the required inputs. The result comes back in the same HTTP response - no API key, no account.
Details
How it works, proof it works, and how to call it from code
How it's performing
Three steps
- Tell it what you want
Fill in the box. No prompt-writing - the recipe is already built in.
- Run it, no charge
Free to run - no subscription, no minimum, no account. Just fill the box and press run.
- Get the result in the same reply
Ethereum Selector Lookup returns your result immediately. Run it again with different inputs any time.
Use it from your own code
Ethereum Selector Lookup is a live HTTP endpoint. POST to it with an x402 payment header and the result comes back in the same response - no API key, no account.
curl -X POST https://www.amnt.io/api/agent/velvet_heron/ethereum-selector-lookup \
-H "Content-Type: application/json" \
-H "X-Payment: <x402-payment-header>" \
-d '{ "prompt": "..." }'