Hedera · Schema

ContractCallRequest

Distributed LedgerBlockchainDLTHashgraphTransactionTokensNFTSmart ContractsEnterprise

Properties

Name Type Description
block stringnull Hexadecimal block number or the string "latest", "pending", "earliest". Defaults to "latest".
data stringnull Hexadecimal method signature and encoded parameters. Up to 131072 bytes as at most 262146 hexadecimal digits including optional leading 0x.
estimate booleannull Whether gas estimation is called. Defaults to false.
from stringnull The 20-byte hexadecimal EVM address the transaction is sent from.
gas integernull Gas provided for the transaction execution. Defaults to 15000000.
gasPrice integernull Gas price used for each paid gas.
to string The 20-byte hexadecimal EVM address the transaction is directed to.
value integernull Value sent with this transaction. Defaults to 0.
View JSON Schema on GitHub

JSON Schema

ContractCallRequest.json Raw ↑
{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://raw.githubusercontent.com/api-evangelist/hedera/refs/heads/main/json-schema/ContractCallRequest.json",
  "title": "ContractCallRequest",
  "type": "object",
  "properties": {
    "block": {
      "description": "Hexadecimal block number or the string \"latest\", \"pending\", \"earliest\". Defaults to \"latest\".",
      "example": "latest",
      "pattern": "^((0x)?[0-9a-fA-F]+|(earliest|pending|latest))$",
      "type": [
        "string",
        "null"
      ]
    },
    "data": {
      "description": "Hexadecimal method signature and encoded parameters. Up to 131072 bytes as at most 262146 hexadecimal digits including optional leading 0x.",
      "example": "0x47f1aae7",
      "format": "binary",
      "maxLength": 262146,
      "pattern": "^(0x)?[0-9a-fA-F]+$",
      "type": [
        "string",
        "null"
      ]
    },
    "estimate": {
      "description": "Whether gas estimation is called. Defaults to false.",
      "example": true,
      "type": [
        "boolean",
        "null"
      ]
    },
    "from": {
      "description": "The 20-byte hexadecimal EVM address the transaction is sent from.",
      "example": "00000000000000000000000000000000000004e2",
      "format": "binary",
      "maxLength": 42,
      "minLength": 40,
      "pattern": "^(0x)?[A-Fa-f0-9]{40}$",
      "type": [
        "string",
        "null"
      ]
    },
    "gas": {
      "description": "Gas provided for the transaction execution. Defaults to 15000000.",
      "example": 15000000,
      "format": "int64",
      "minimum": 0,
      "type": [
        "integer",
        "null"
      ]
    },
    "gasPrice": {
      "description": "Gas price used for each paid gas.",
      "example": 100000000,
      "format": "int64",
      "minimum": 0,
      "type": [
        "integer",
        "null"
      ]
    },
    "to": {
      "description": "The 20-byte hexadecimal EVM address the transaction is directed to.",
      "example": "0xd9d0c5c0ff85758bdf05a7636f8036d4d065f5b6",
      "format": "binary",
      "maxLength": 42,
      "minLength": 40,
      "pattern": "^(0x)?[A-Fa-f0-9]{40}$",
      "type": "string"
    },
    "value": {
      "description": "Value sent with this transaction. Defaults to 0.",
      "example": 0,
      "format": "int64",
      "minimum": 0,
      "type": [
        "integer",
        "null"
      ]
    }
  },
  "required": [
    "to"
  ]
}

Work with this as data

Every JSON Schema here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for schemas

4 MCP tools reach this
  • find_json_schemasBrowse and filter every JSON Schema in the catalog.
  • apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
  • resolveTurn a domain, URL or GitHub org into the provider it belongs to.
  • find_cohortsEvery scored population of providers in the catalog.
All 92 tools →

Call it yourself

curl for this page
This JSON Schema
curl "https://apis.io/api/v1/json-schemas/ContractCallRequest"
All schemas
curl "https://apis.io/api/v1/json-schemas?limit=25"

Discovery needs no key. Ratings and market analysis are Pro.

Get an API key

Free tier, no form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.

A second provider on the same verified email joins the account you already have.