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

> Get summary information about all Cardano blockchain eras including their start times and parameters.

# Era summary



## OpenAPI

````yaml cardano/blockchain-indexer-api/openapi.json get /era-summaries
openapi: 3.0.3
info:
  title: Cardano - Blockchain Indexer API
  description: Core indexer endpoints dedicated to Cardano.
  contact:
    name: Maestro Blockchain Inc.
    url: https://gomaestro.org/
    email: info@gomaestro.org
  license:
    name: Apache 2.0
    url: https://www.apache.org/licenses/LICENSE-2.0.txt
  version: v1.8.0
servers:
  - url: https://mainnet.gomaestro-api.org/v1
    description: Cardano Mainnet
  - url: https://preprod.gomaestro-api.org/v1
    description: Cardano Preprod
  - url: https://preview.gomaestro-api.org/v1
    description: Cardano Preview
security:
  - api-key: []
tags:
  - name: Maestro
paths:
  /era-summaries:
    get:
      tags:
        - General
      summary: Era summary
      description: >-
        Returns the blockchain era summaries. May include a future Era before
        hard forks. You should not assume the last item is the current epoch.
        Check "slot" against the current /chain-tip.
      operationId: era_summaries
      responses:
        '200':
          description: Get era summaries
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/TimestampedEraSummaries'
              example:
                data:
                  - start:
                      time:
                        seconds: 0
                      slot: 0
                      epoch: 0
                    end:
                      time:
                        seconds: 1728000
                      slot: 86400
                      epoch: 4
                    parameters:
                      epoch_length: 21600
                      slot_length:
                        milliseconds: 20000
                      safe_zone: 4320
                  - start:
                      time:
                        seconds: 1728000
                      slot: 86400
                      epoch: 4
                    end:
                      time:
                        seconds: 2160000
                      slot: 518400
                      epoch: 5
                    parameters:
                      epoch_length: 432000
                      slot_length:
                        milliseconds: 1000
                      safe_zone: 129600
                  - start:
                      time:
                        seconds: 2160000
                      slot: 518400
                      epoch: 5
                    end:
                      time:
                        seconds: 2592000
                      slot: 950400
                      epoch: 6
                    parameters:
                      epoch_length: 432000
                      slot_length:
                        milliseconds: 1000
                      safe_zone: 129600
                  - start:
                      time:
                        seconds: 2592000
                      slot: 950400
                      epoch: 6
                    end:
                      time:
                        seconds: 3024000
                      slot: 1382400
                      epoch: 7
                    parameters:
                      epoch_length: 432000
                      slot_length:
                        milliseconds: 1000
                      safe_zone: 129600
                  - start:
                      time:
                        seconds: 3024000
                      slot: 1382400
                      epoch: 7
                    end:
                      time:
                        seconds: 5184000
                      slot: 3542400
                      epoch: 12
                    parameters:
                      epoch_length: 432000
                      slot_length:
                        milliseconds: 1000
                      safe_zone: 129600
                  - start:
                      time:
                        seconds: 5184000
                      slot: 3542400
                      epoch: 12
                    end:
                      time:
                        seconds: 70416000
                      slot: 68774400
                      epoch: 163
                    parameters:
                      epoch_length: 432000
                      slot_length:
                        milliseconds: 1000
                      safe_zone: 129600
                  - start:
                      time:
                        seconds: 70416000
                      slot: 68774400
                      epoch: 163
                    end:
                      time:
                        seconds: 71280000
                      slot: 69638400
                      epoch: 165
                    parameters:
                      epoch_length: 432000
                      slot_length:
                        milliseconds: 1000
                      safe_zone: 129600
                last_updated:
                  timestamp: '2024-08-30 15:37:05'
                  block_hash: >-
                    cffcdbe42399a72449325dbb8f207d84c86b9609ec36e45b67e9bc538ecdc6d6
                  block_slot: 69349025
        '500':
          description: Internal server error
components:
  schemas:
    TimestampedEraSummaries:
      type: object
      description: >-
        Timestamped response. Returns the endpoint response data along with the
        chain-tip of the indexer, which details at which point in the chain's
        history the data was correct as-of.
      required:
        - data
        - last_updated
      properties:
        data:
          $ref: '#/components/schemas/Eras'
        last_updated:
          $ref: '#/components/schemas/LastUpdated'
    Eras:
      type: array
      items:
        $ref: '#/components/schemas/Era'
    LastUpdated:
      type: object
      description: >-
        Details of the most recent block processed by the indexer (aka chain
        tip); that is, the data returned is correct as of this block in time.
      required:
        - timestamp
        - block_hash
        - block_slot
      properties:
        block_hash:
          type: string
          description: >-
            Hex-encoded hash of the most recently processed block (aka chain
            tip)
        block_slot:
          type: integer
          format: int64
          description: Absolute slot of the most recently processed block (aka chain tip)
          minimum: 0
        timestamp:
          type: string
          description: UTC timestamp of when the most recently processed block was minted
    Era:
      type: object
      required:
        - start
        - end
        - parameters
      properties:
        end:
          $ref: '#/components/schemas/End'
        parameters:
          $ref: '#/components/schemas/Parameters'
        start:
          $ref: '#/components/schemas/Start'
    End:
      type: object
      required:
        - time
        - slot
        - epoch
      properties:
        epoch:
          type: integer
          format: int64
        slot:
          type: integer
          format: int64
        time:
          $ref: '#/components/schemas/Time'
    Parameters:
      type: object
      required:
        - epoch_length
        - slot_length
        - safe_zone
      properties:
        epoch_length:
          type: integer
          format: int64
        safe_zone:
          type: integer
          format: int64
        slot_length:
          $ref: '#/components/schemas/SlotLength'
    Start:
      type: object
      required:
        - time
        - slot
        - epoch
      properties:
        epoch:
          type: integer
          format: int64
        slot:
          type: integer
          format: int64
        time:
          $ref: '#/components/schemas/Time'
    Time:
      type: object
      required:
        - seconds
      properties:
        seconds:
          type: integer
          format: int64
    SlotLength:
      type: object
      required:
        - milliseconds
      properties:
        milliseconds:
          type: integer
          format: int64
  securitySchemes:
    api-key:
      type: apiKey
      in: header
      name: api-key
      description: Project API Key

````