> ## Documentation Index > Fetch the complete documentation index at: https://docs.validationcloud.io/llms.txt > Use this file to discover all available pages before exploring further. # Get Ledger Info > Get the latest ledger information, including data such as chain ID, role type, ledger versions, epoch, etc. Get the latest ledger information, including data such as chain ID, role type, ledger versions, epoch, etc. This method will use `10` [Compute Units](/nodeapi/about/billing). *** ## OpenAPI ````yaml nodeapi/openapi/document-aptos-with-v1-fix.json GET / openapi: 3.0.0 info: title: Aptos Node API description: >- The Aptos Node API is a RESTful API for client applications to interact with the Aptos blockchain. version: 1.2.0 contact: name: Aptos Labs url: https://github.com/aptos-labs/aptos-core license: name: Apache 2.0 url: https://www.apache.org/licenses/LICENSE-2.0.html servers: - url: https://mainnet.aptos.validationcloud.io/v1//v1 security: [] tags: - name: Accounts description: Access to accounts, resources, and modules - name: Blocks description: Access to blocks - name: Events description: Access to events - name: General description: General information - name: Tables description: Access to tables - name: Transactions description: Access to transactions - name: View description: View functions, externalDocs: url: https://github.com/aptos-labs/aptos-core paths: /: get: tags: - General summary: Get ledger info description: |- Get the latest ledger information, including data such as chain ID, role type, ledger versions, epoch, etc. operationId: get_ledger_info responses: '200': description: '' content: application/json: schema: $ref: '#/components/schemas/IndexResponse' application/x-bcs: schema: type: array items: type: integer format: uint8 headers: X-APTOS-CHAIN-ID: description: Chain ID of the current chain required: true deprecated: false schema: type: integer format: uint8 X-APTOS-LEDGER-VERSION: description: Current ledger version of the chain required: true deprecated: false schema: type: integer format: uint64 X-APTOS-LEDGER-OLDEST-VERSION: description: Oldest non-pruned ledger version of the chain required: true deprecated: false schema: type: integer format: uint64 X-APTOS-LEDGER-TIMESTAMPUSEC: description: Current timestamp of the chain required: true deprecated: false schema: type: integer format: uint64 X-APTOS-EPOCH: description: Current epoch of the chain required: true deprecated: false schema: type: integer format: uint64 X-APTOS-BLOCK-HEIGHT: description: Current block height of the chain required: true deprecated: false schema: type: integer format: uint64 X-APTOS-OLDEST-BLOCK-HEIGHT: description: Oldest non-pruned block height of the chain required: true deprecated: false schema: type: integer format: uint64 X-APTOS-CURSOR: description: |- Cursor to be used for endpoints that support cursor-based pagination. Pass this to the `start` field of the endpoint on the next call to get the next page of results. deprecated: false schema: type: string '400': description: '' content: application/json: schema: $ref: '#/components/schemas/AptosError' headers: X-APTOS-CHAIN-ID: description: Chain ID of the current chain deprecated: false schema: type: integer format: uint8 X-APTOS-LEDGER-VERSION: description: Current ledger version of the chain deprecated: false schema: type: integer format: uint64 X-APTOS-LEDGER-OLDEST-VERSION: description: Oldest non-pruned ledger version of the chain deprecated: false schema: type: integer format: uint64 X-APTOS-LEDGER-TIMESTAMPUSEC: description: Current timestamp of the chain deprecated: false schema: type: integer format: uint64 X-APTOS-EPOCH: description: Current epoch of the chain deprecated: false schema: type: integer format: uint64 X-APTOS-BLOCK-HEIGHT: description: Current block height of the chain deprecated: false schema: type: integer format: uint64 X-APTOS-OLDEST-BLOCK-HEIGHT: description: Oldest non-pruned block height of the chain deprecated: false schema: type: integer format: uint64 '403': description: '' content: application/json: schema: $ref: '#/components/schemas/AptosError' headers: X-APTOS-CHAIN-ID: description: Chain ID of the current chain deprecated: false schema: type: integer format: uint8 X-APTOS-LEDGER-VERSION: description: Current ledger version of the chain deprecated: false schema: type: integer format: uint64 X-APTOS-LEDGER-OLDEST-VERSION: description: Oldest non-pruned ledger version of the chain deprecated: false schema: type: integer format: uint64 X-APTOS-LEDGER-TIMESTAMPUSEC: description: Current timestamp of the chain deprecated: false schema: type: integer format: uint64 X-APTOS-EPOCH: description: Current epoch of the chain deprecated: false schema: type: integer format: uint64 X-APTOS-BLOCK-HEIGHT: description: Current block height of the chain deprecated: false schema: type: integer format: uint64 X-APTOS-OLDEST-BLOCK-HEIGHT: description: Oldest non-pruned block height of the chain deprecated: false schema: type: integer format: uint64 '500': description: '' content: application/json: schema: $ref: '#/components/schemas/AptosError' headers: X-APTOS-CHAIN-ID: description: Chain ID of the current chain deprecated: false schema: type: integer format: uint8 X-APTOS-LEDGER-VERSION: description: Current ledger version of the chain deprecated: false schema: type: integer format: uint64 X-APTOS-LEDGER-OLDEST-VERSION: description: Oldest non-pruned ledger version of the chain deprecated: false schema: type: integer format: uint64 X-APTOS-LEDGER-TIMESTAMPUSEC: description: Current timestamp of the chain deprecated: false schema: type: integer format: uint64 X-APTOS-EPOCH: description: Current epoch of the chain deprecated: false schema: type: integer format: uint64 X-APTOS-BLOCK-HEIGHT: description: Current block height of the chain deprecated: false schema: type: integer format: uint64 X-APTOS-OLDEST-BLOCK-HEIGHT: description: Oldest non-pruned block height of the chain deprecated: false schema: type: integer format: uint64 '503': description: '' content: application/json: schema: $ref: '#/components/schemas/AptosError' headers: X-APTOS-CHAIN-ID: description: Chain ID of the current chain deprecated: false schema: type: integer format: uint8 X-APTOS-LEDGER-VERSION: description: Current ledger version of the chain deprecated: false schema: type: integer format: uint64 X-APTOS-LEDGER-OLDEST-VERSION: description: Oldest non-pruned ledger version of the chain deprecated: false schema: type: integer format: uint64 X-APTOS-LEDGER-TIMESTAMPUSEC: description: Current timestamp of the chain deprecated: false schema: type: integer format: uint64 X-APTOS-EPOCH: description: Current epoch of the chain deprecated: false schema: type: integer format: uint64 X-APTOS-BLOCK-HEIGHT: description: Current block height of the chain deprecated: false schema: type: integer format: uint64 X-APTOS-OLDEST-BLOCK-HEIGHT: description: Oldest non-pruned block height of the chain deprecated: false schema: type: integer format: uint64 components: schemas: IndexResponse: type: object description: |- The struct holding all data returned to the client by the index endpoint (i.e., GET "/"). Only for responding in JSON required: - chain_id - epoch - ledger_version - oldest_ledger_version - ledger_timestamp - node_role - oldest_block_height - block_height properties: chain_id: type: integer format: uint8 description: Chain ID of the current chain epoch: $ref: '#/components/schemas/U64' ledger_version: $ref: '#/components/schemas/U64' oldest_ledger_version: $ref: '#/components/schemas/U64' ledger_timestamp: $ref: '#/components/schemas/U64' node_role: $ref: '#/components/schemas/RoleType' oldest_block_height: $ref: '#/components/schemas/U64' block_height: $ref: '#/components/schemas/U64' git_hash: type: string description: >- Git hash of the build of the API endpoint. Can be used to determine the exact software version used by the API endpoint. AptosError: type: object description: >- This is the generic struct we use for all API errors, it contains a string message and an Aptos API specific error code. required: - message - error_code properties: message: type: string description: A message describing the error error_code: $ref: '#/components/schemas/AptosErrorCode' vm_error_code: type: integer format: uint64 description: >- A code providing VM error details when submitting transactions to the VM U64: type: string format: uint64 description: > A string containing a 64-bit unsigned integer. We represent u64 values as a string to ensure compatibility with languages such as JavaScript that do not parse u64s in JSON natively. example: '32425224034' RoleType: type: string enum: - validator - full_node AptosErrorCode: type: string description: |- These codes provide more granular error information beyond just the HTTP status code of the response. enum: - account_not_found - resource_not_found - module_not_found - struct_field_not_found - version_not_found - transaction_not_found - table_item_not_found - block_not_found - version_pruned - block_pruned - invalid_input - invalid_transaction_update - sequence_number_too_old - vm_error - health_check_failed - mempool_is_full - internal_error - web_framework_error - bcs_not_supported - api_disabled ```` This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.