Blockchain MCP Server

4byte

Retrieve Ethereum function signatures using a 4-byte hex selector from the 4byte.directory database. Simplify smart contract interactions by identifying function details quickly and accurately.

Instructions

Get function signatures for the given selector from 4byte.directory

Input Schema

Name	Required	Description	Default
`selector`	Yes	Function selector (4-byte hex), e.g., '0xa9059cbb' or 'a9059cbb'

Input Schema (JSON Schema)

{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "additionalProperties": false,
  "properties": {
    "selector": {
      "description": "Function selector (4-byte hex), e.g., '0xa9059cbb' or 'a9059cbb'",
      "type": "string"
    }
  },
  "required": [
    "selector"
  ],
  "type": "object"
}

Install Server

HTTP connection URL

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