> ## Documentation Index
> Fetch the complete documentation index at: https://chainstack-docs-polygon-erigon-trace-deprecation.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# eth_protocolVersion | Base

> Base API method that returns the protocol version of the node. eth_protocolVersion JSON-RPC method available on the Base blockchain via Chainstack.

Base API method that returns the protocol version of the node. The protocol version is a string that identifies the version of the Base protocol that the node is running.

## Parameters

* `none`

## Response

* `result` — a string specifying the Base protocol version that the node is using.

## Use case

The `eth_protocolVersion` method is useful for applications that need to verify the protocol version of the node they're connecting to. This can be important for compatibility checks and ensuring that the node supports the features required by the application.


## OpenAPI

````yaml openapi/base_node_api/eth_protocolVersion.json POST /2fc1de7f08c0465f6a28e3c355e0cb14
openapi: 3.0.0
info:
  title: eth_protocolVersion example
  version: 1.0.0
  description: >-
    This is an API example for eth_protocolVersion, a method to get the current
    ethereum protocol version.
servers:
  - url: https://base-mainnet.core.chainstack.com
security: []
paths:
  /2fc1de7f08c0465f6a28e3c355e0cb14:
    post:
      tags:
        - Ethereum Operations
      summary: eth_protocolVersion
      operationId: protocolVersion
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              properties:
                jsonrpc:
                  type: string
                  default: '2.0'
                method:
                  type: string
                  default: eth_protocolVersion
                id:
                  type: integer
                  default: 1
      responses:
        '200':
          description: The current ethereum protocol version
          content:
            application/json:
              schema:
                type: object
                properties:
                  jsonrpc:
                    type: string
                  id:
                    type: integer
                  result:
                    type: string

````