---
updatedAt: 2026-05-27T08:51:57.000Z
agentTools:
  projectIndex: https://docs.tatum.io/llms.txt
---

# eth_blockNumber - Ethereum

The **eth_blockNumber** method is part of the Ethereum JSON-RPC API, which is used to interact with the Ethereum blockchain.

This method is particularly useful for various use cases within the blockchain ecosystem, including but not limited to:

Monitoring Blockchain Health: By regularly checking the latest block number, developers can monitor the health and activity of the Ethereum blockchain. This can be crucial for applications that rely on the blockchain for their operations, as it helps in identifying any potential issues or delays in block production.
Synchronization Checks: For applications that interact with the Ethereum blockchain, knowing the latest block number can be essential for synchronization purposes. It helps in ensuring that the application's data is up-to-date with the blockchain's state.
Transaction Verification: When submitting transactions to the blockchain, knowing the current block number can be useful for setting appropriate gas prices and for verifying transaction confirmations.


# OpenAPI definition

```json
{
  "openapi": "3.1.0",
  "info": {
    "title": "eth_blockNumber - Ethereum",
    "description": "Retrieves information from a particular block in the blockchain.",
    "version": "1.0"
  },
  "servers": [
    {
      "url": "https://{ethereum-network}.gateway.tatum.io",
      "description": "RPC Gateway - Recommended",
      "variables": {
        "ethereum-network": {
          "enum": [
            "ethereum-mainnet",
            "ethereum-sepolia",
            "ethereum-hoodi"
          ],
          "default": "ethereum-mainnet"
        }
      }
    },
    {
      "url": "https://api.tatum.io/v3/blockchain/node/{ethereum-network}",
      "description": "Deprecated",
      "variables": {
        "ethereum-network": {
          "enum": [
            "ethereum-mainnet",
            "ethereum-sepolia",
            "ethereum-hoodi"
          ],
          "default": "ethereum-mainnet"
        }
      }
    }
  ],
  "x-sandbox": {
    "category": {
      "type": {
        "name": "category",
        "type": "string",
        "enum": [
          "core",
          "bundler",
          "nft",
          "token",
          "transfers",
          "transaction-receipts",
          "gas-manager",
          "trace",
          "debug",
          "gas-optimized-transactions",
          "private-transactions",
          "notify",
          "transaction-simulation"
        ]
      },
      "value": "core"
    }
  },
  "paths": {
    "/": {
      "post": {
        "x-readme": {
          "samples-languages": [
            "shell",
            "javascript",
            "python",
            "java",
            "php"
          ]
        },
        "summary": "eth_blockNumber - Ethereum",
        "operationId": "rpc-ethereum-eth_blocknumber",
        "description": "The **eth_blockNumber** method is part of the Ethereum JSON-RPC API, which is used to interact with the Ethereum blockchain.\n\nThis method is particularly useful for various use cases within the blockchain ecosystem, including but not limited to:\n\nMonitoring Blockchain Health: By regularly checking the latest block number, developers can monitor the health and activity of the Ethereum blockchain. This can be crucial for applications that rely on the blockchain for their operations, as it helps in identifying any potential issues or delays in block production.\nSynchronization Checks: For applications that interact with the Ethereum blockchain, knowing the latest block number can be essential for synchronization purposes. It helps in ensuring that the application's data is up-to-date with the blockchain's state.\nTransaction Verification: When submitting transactions to the blockchain, knowing the current block number can be useful for setting appropriate gas prices and for verifying transaction confirmations.\n",
        "requestBody": {
          "description": "Accepts nothing.",
          "content": {
            "application/json": {
              "schema": {
                "allOf": [
                  {
                    "type": "object",
                    "properties": {
                      "id": {
                        "type": "integer",
                        "default": 1
                      },
                      "jsonrpc": {
                        "type": "string",
                        "default": "2.0"
                      }
                    }
                  },
                  {
                    "type": "object",
                    "properties": {
                      "method": {
                        "default": "eth_blockNumber",
                        "type": "string"
                      }
                    }
                  }
                ]
              }
            }
          }
        },
        "responses": {
          "200": {
            "description": "Returns integer of the current block number the client is on.",
            "content": {
              "application/json": {
                "schema": {
                  "allOf": [
                    {
                      "type": "object",
                      "properties": {
                        "id": {
                          "type": "integer"
                        },
                        "jsonrpc": {
                          "type": "string"
                        }
                      }
                    },
                    {
                      "type": "object",
                      "description": "The current block number the client is on (in hex).",
                      "properties": {
                        "result": {
                          "type": "string",
                          "description": "The current block number the client is on (in hex)."
                        }
                      },
                      "example": {
                        "jsonrpc": "2.0",
                        "id": 1,
                        "result": "0xfd2fdb"
                      }
                    }
                  ]
                }
              }
            }
          }
        },
        "security": [
          {
            "X-API-Key": []
          }
        ]
      }
    }
  },
  "components": {
    "securitySchemes": {
      "X-API-Key": {
        "type": "apiKey",
        "name": "x-api-key",
        "in": "header",
        "description": "Your **API key** is used to identify your account & your plan, including the number of API calls per second and total monthly calls you have.\n\nEach key is for individual use only.\n\nIf you don't have a key already you can [Sign up for a Free Tatum account](https://co.tatum.io/signup) to get two keys (testnet and mainnet), allowing up to 5 API calls per second and 1,000,000 Credits.\n\nFor testing purposes, you can use the following key which only works inside docs and has limited functionality (e.g. you cannot create virtual accounts or notification subscriptions with it):\n* t-66a730ccccfd17001c479705-2f597d14ad7543f289a03418\n\nFor more details on limits and plans, [click here](https://docs.tatum.io/docs/plans-limits).\n"
      }
    }
  }
}
```