> ## Documentation Index
> Fetch the complete documentation index at: https://docs.herodotus.cloud/llms.txt
> Use this file to discover all available pages before exploring further.

# Retrieve chain definitions

> Returns a dictionary of chain IDs and their corresponding names



## OpenAPI

````yaml /storage-proofs-api/openapi-storage-proof-api.json get /chain-definitions
openapi: 3.0.3
info:
  title: Storage Proofs API
  description: >-
    API for submitting and managing Storage Proofs API requests across various
    blockchain networks
  version: 1.0.0
servers:
  - url: https://api.herodotus.cloud
    description: Production Server
  - url: https://staging.api.herodotus.cloud
    description: Staging Server
security: []
tags:
  - name: The one you want
    description: Probably the route you're looking for
  - name: Basic Batch Query
    description: Batch Query routes
  - name: Health check
    description: Health check routes
  - name: Info
    description: Info routes
paths:
  /chain-definitions:
    get:
      tags:
        - Info
      summary: Retrieve chain definitions
      description: Returns a dictionary of chain IDs and their corresponding names
      responses:
        '200':
          description: Default Response
          content:
            application/json:
              schema:
                type: object
                properties:
                  definitions:
                    type: object
                    properties:
                      '1':
                        type: string
                        enum:
                          - Ethereum Mainnet
                      '300':
                        type: string
                        enum:
                          - zkSync Era Sepolia
                      '4801':
                        type: string
                        enum:
                          - World Chain Sepolia
                      '84532':
                        type: string
                        enum:
                          - Base Sepolia
                      '421614':
                        type: string
                        enum:
                          - Arbitrum Sepolia
                      '11155111':
                        type: string
                        enum:
                          - Ethereum Sepolia
                      '11155420':
                        type: string
                        enum:
                          - Optimism Sepolia
                      STARKNET:
                        type: string
                        enum:
                          - Starknet Mainnet
                      SN_SEPOLIA:
                        type: string
                        enum:
                          - Starknet Sepolia
                    required:
                      - '1'
                      - '300'
                      - '4801'
                      - '84532'
                      - '421614'
                      - '11155111'
                      - '11155420'
                      - STARKNET
                      - SN_SEPOLIA
                    additionalProperties: false
                required:
                  - definitions
                additionalProperties: false
      security: []

````