> ## 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 current Cardano blockchain protocol parameters including fees, limits, and governance settings.

# Protocol parameters



## OpenAPI

````yaml cardano/blockchain-indexer-api/openapi.json get /protocol-parameters
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:
  /protocol-parameters:
    get:
      tags:
        - General
      summary: Protocol parameters
      description: Returns the current blockchain protocol parameters
      operationId: protocol_parameters
      responses:
        '200':
          description: Get protocol params
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/TimestampedProtocolParameters'
              example:
                data:
                  min_fee_coefficient: 44
                  min_fee_constant:
                    ada:
                      lovelace: 155381
                  min_fee_reference_scripts:
                    base: 15
                    range: 25600
                    multiplier: 1.2
                  max_block_body_size:
                    bytes: 90112
                  max_block_header_size:
                    bytes: 1100
                  max_transaction_size:
                    bytes: 16384
                  max_reference_scripts_size:
                    bytes: 204800
                  stake_credential_deposit:
                    ada:
                      lovelace: 2000000
                  stake_pool_deposit:
                    ada:
                      lovelace: 500000000
                  stake_pool_retirement_epoch_bound: 18
                  desired_number_of_stake_pools: 500
                  stake_pool_pledge_influence: 3/10
                  monetary_expansion: 3/1000
                  treasury_expansion: 1/5
                  min_stake_pool_cost:
                    ada:
                      lovelace: 170000000
                  min_utxo_deposit_constant:
                    ada:
                      lovelace: 0
                  min_utxo_deposit_coefficient: 4310
                  plutus_cost_models:
                    plutus_v1:
                      - 100788
                      - 420
                      - 1
                      - 1
                      - 1000
                      - 173
                      - 0
                      - 1
                      - 1000
                      - 59957
                      - 4
                      - 1
                      - 11183
                      - 32
                      - 201305
                      - 8356
                      - 4
                      - 16000
                      - 100
                      - 16000
                      - 100
                      - 16000
                      - 100
                      - 16000
                      - 100
                      - 16000
                      - 100
                      - 16000
                      - 100
                      - 100
                      - 100
                      - 16000
                      - 100
                      - 94375
                      - 32
                      - 132994
                      - 32
                      - 61462
                      - 4
                      - 72010
                      - 178
                      - 0
                      - 1
                      - 22151
                      - 32
                      - 91189
                      - 769
                      - 4
                      - 2
                      - 85848
                      - 228465
                      - 122
                      - 0
                      - 1
                      - 1
                      - 1000
                      - 42921
                      - 4
                      - 2
                      - 24548
                      - 29498
                      - 38
                      - 1
                      - 898148
                      - 27279
                      - 1
                      - 51775
                      - 558
                      - 1
                      - 39184
                      - 1000
                      - 60594
                      - 1
                      - 141895
                      - 32
                      - 83150
                      - 32
                      - 15299
                      - 32
                      - 76049
                      - 1
                      - 13169
                      - 4
                      - 22100
                      - 10
                      - 28999
                      - 74
                      - 1
                      - 28999
                      - 74
                      - 1
                      - 43285
                      - 552
                      - 1
                      - 44749
                      - 541
                      - 1
                      - 33852
                      - 32
                      - 68246
                      - 32
                      - 72362
                      - 32
                      - 7243
                      - 32
                      - 7391
                      - 32
                      - 11546
                      - 32
                      - 85848
                      - 228465
                      - 122
                      - 0
                      - 1
                      - 1
                      - 90434
                      - 519
                      - 0
                      - 1
                      - 74433
                      - 32
                      - 85848
                      - 228465
                      - 122
                      - 0
                      - 1
                      - 1
                      - 85848
                      - 228465
                      - 122
                      - 0
                      - 1
                      - 1
                      - 270652
                      - 22588
                      - 4
                      - 1457325
                      - 64566
                      - 4
                      - 20467
                      - 1
                      - 4
                      - 0
                      - 141992
                      - 32
                      - 100788
                      - 420
                      - 1
                      - 1
                      - 81663
                      - 32
                      - 59498
                      - 32
                      - 20142
                      - 32
                      - 24588
                      - 32
                      - 20744
                      - 32
                      - 25933
                      - 32
                      - 24623
                      - 32
                      - 53384111
                      - 14333
                      - 10
                    plutus_v2:
                      - 100788
                      - 420
                      - 1
                      - 1
                      - 1000
                      - 173
                      - 0
                      - 1
                      - 1000
                      - 59957
                      - 4
                      - 1
                      - 11183
                      - 32
                      - 201305
                      - 8356
                      - 4
                      - 16000
                      - 100
                      - 16000
                      - 100
                      - 16000
                      - 100
                      - 16000
                      - 100
                      - 16000
                      - 100
                      - 16000
                      - 100
                      - 100
                      - 100
                      - 16000
                      - 100
                      - 94375
                      - 32
                      - 132994
                      - 32
                      - 61462
                      - 4
                      - 72010
                      - 178
                      - 0
                      - 1
                      - 22151
                      - 32
                      - 91189
                      - 769
                      - 4
                      - 2
                      - 85848
                      - 228465
                      - 122
                      - 0
                      - 1
                      - 1
                      - 1000
                      - 42921
                      - 4
                      - 2
                      - 24548
                      - 29498
                      - 38
                      - 1
                      - 898148
                      - 27279
                      - 1
                      - 51775
                      - 558
                      - 1
                      - 39184
                      - 1000
                      - 60594
                      - 1
                      - 141895
                      - 32
                      - 83150
                      - 32
                      - 15299
                      - 32
                      - 76049
                      - 1
                      - 13169
                      - 4
                      - 22100
                      - 10
                      - 28999
                      - 74
                      - 1
                      - 28999
                      - 74
                      - 1
                      - 43285
                      - 552
                      - 1
                      - 44749
                      - 541
                      - 1
                      - 33852
                      - 32
                      - 68246
                      - 32
                      - 72362
                      - 32
                      - 7243
                      - 32
                      - 7391
                      - 32
                      - 11546
                      - 32
                      - 85848
                      - 228465
                      - 122
                      - 0
                      - 1
                      - 1
                      - 90434
                      - 519
                      - 0
                      - 1
                      - 74433
                      - 32
                      - 85848
                      - 228465
                      - 122
                      - 0
                      - 1
                      - 1
                      - 85848
                      - 228465
                      - 122
                      - 0
                      - 1
                      - 1
                      - 955506
                      - 213312
                      - 0
                      - 2
                      - 270652
                      - 22588
                      - 4
                      - 1457325
                      - 64566
                      - 4
                      - 20467
                      - 1
                      - 4
                      - 0
                      - 141992
                      - 32
                      - 100788
                      - 420
                      - 1
                      - 1
                      - 81663
                      - 32
                      - 59498
                      - 32
                      - 20142
                      - 32
                      - 24588
                      - 32
                      - 20744
                      - 32
                      - 25933
                      - 32
                      - 24623
                      - 32
                      - 43053543
                      - 10
                      - 53384111
                      - 14333
                      - 10
                      - 43574283
                      - 26308
                      - 10
                    plutus_v3:
                      - 100788
                      - 420
                      - 1
                      - 1
                      - 1000
                      - 173
                      - 0
                      - 1
                      - 1000
                      - 59957
                      - 4
                      - 1
                      - 11183
                      - 32
                      - 201305
                      - 8356
                      - 4
                      - 16000
                      - 100
                      - 16000
                      - 100
                      - 16000
                      - 100
                      - 16000
                      - 100
                      - 16000
                      - 100
                      - 16000
                      - 100
                      - 100
                      - 100
                      - 16000
                      - 100
                      - 94375
                      - 32
                      - 132994
                      - 32
                      - 61462
                      - 4
                      - 72010
                      - 178
                      - 0
                      - 1
                      - 22151
                      - 32
                      - 91189
                      - 769
                      - 4
                      - 2
                      - 85848
                      - 123203
                      - 7305
                      - -900
                      - 1716
                      - 549
                      - 57
                      - 85848
                      - 0
                      - 1
                      - 1
                      - 1000
                      - 42921
                      - 4
                      - 2
                      - 24548
                      - 29498
                      - 38
                      - 1
                      - 898148
                      - 27279
                      - 1
                      - 51775
                      - 558
                      - 1
                      - 39184
                      - 1000
                      - 60594
                      - 1
                      - 141895
                      - 32
                      - 83150
                      - 32
                      - 15299
                      - 32
                      - 76049
                      - 1
                      - 13169
                      - 4
                      - 22100
                      - 10
                      - 28999
                      - 74
                      - 1
                      - 28999
                      - 74
                      - 1
                      - 43285
                      - 552
                      - 1
                      - 44749
                      - 541
                      - 1
                      - 33852
                      - 32
                      - 68246
                      - 32
                      - 72362
                      - 32
                      - 7243
                      - 32
                      - 7391
                      - 32
                      - 11546
                      - 32
                      - 85848
                      - 123203
                      - 7305
                      - -900
                      - 1716
                      - 549
                      - 57
                      - 85848
                      - 0
                      - 1
                      - 90434
                      - 519
                      - 0
                      - 1
                      - 74433
                      - 32
                      - 85848
                      - 123203
                      - 7305
                      - -900
                      - 1716
                      - 549
                      - 57
                      - 85848
                      - 0
                      - 1
                      - 1
                      - 85848
                      - 123203
                      - 7305
                      - -900
                      - 1716
                      - 549
                      - 57
                      - 85848
                      - 0
                      - 1
                      - 955506
                      - 213312
                      - 0
                      - 2
                      - 270652
                      - 22588
                      - 4
                      - 1457325
                      - 64566
                      - 4
                      - 20467
                      - 1
                      - 4
                      - 0
                      - 141992
                      - 32
                      - 100788
                      - 420
                      - 1
                      - 1
                      - 81663
                      - 32
                      - 59498
                      - 32
                      - 20142
                      - 32
                      - 24588
                      - 32
                      - 20744
                      - 32
                      - 25933
                      - 32
                      - 24623
                      - 32
                      - 43053543
                      - 10
                      - 53384111
                      - 14333
                      - 10
                      - 43574283
                      - 26308
                      - 10
                      - 16000
                      - 100
                      - 16000
                      - 100
                      - 962335
                      - 18
                      - 2780678
                      - 6
                      - 442008
                      - 1
                      - 52538055
                      - 3756
                      - 18
                      - 267929
                      - 18
                      - 76433006
                      - 8868
                      - 18
                      - 52948122
                      - 18
                      - 1995836
                      - 36
                      - 3227919
                      - 12
                      - 901022
                      - 1
                      - 166917843
                      - 4307
                      - 36
                      - 284546
                      - 36
                      - 158221314
                      - 26549
                      - 36
                      - 74698472
                      - 36
                      - 333849714
                      - 1
                      - 254006273
                      - 72
                      - 2174038
                      - 72
                      - 2261318
                      - 64571
                      - 4
                      - 207616
                      - 8310
                      - 4
                      - 1293828
                      - 28716
                      - 63
                      - 0
                      - 1
                      - 1006041
                      - 43623
                      - 251
                      - 0
                      - 1
                  script_execution_prices:
                    memory: 577/10000
                    cpu: 721/10000000
                  max_execution_units_per_transaction:
                    memory: 14000000
                    cpu: 10000000000
                  max_execution_units_per_block:
                    memory: 62000000
                    cpu: 20000000000
                  max_value_size:
                    bytes: 5000
                  collateral_percentage: 150
                  max_collateral_inputs: 3
                  version:
                    major: 9
                    minor: 0
                  stake_pool_voting_thresholds:
                    no_confidence: 51/100
                    constitutional_committee:
                      default: 51/100
                      state_of_no_confidence: 51/100
                    hard_fork_initiation: 51/100
                    protocol_parameters_update:
                      security: 51/100
                  delegate_representative_voting_thresholds:
                    no_confidence: 67/100
                    constitutional_committee:
                      default: 67/100
                      state_of_no_confidence: 3/5
                    constitution: 3/4
                    hard_fork_initiation: 3/5
                    protocol_parameters_update:
                      network: 67/100
                      economic: 67/100
                      technical: 67/100
                      governance: 3/4
                    treasury_withdrawals: 67/100
                  constitutional_committee_min_size: 7
                  constitutional_committee_max_term_length: 146
                  governance_action_lifetime: 6
                  governance_action_deposit:
                    ada:
                      lovelace: 100000000000
                  delegate_representative_deposit:
                    ada:
                      lovelace: 500000000
                  delegate_representative_max_idle_time: 20
                last_updated:
                  timestamp: '2024-08-29 16:03:26'
                  block_hash: >-
                    ebe27467ad34f4ecb80a3a537aae2e084e34d751426d484f87a5a6a9db4c216f
                  block_slot: 69264206
        '500':
          description: Internal server error
components:
  schemas:
    TimestampedProtocolParameters:
      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/ProtocolParametersV6'
        last_updated:
          $ref: '#/components/schemas/LastUpdated'
    ProtocolParametersV6:
      type: object
      required:
        - min_fee_coefficient
        - min_fee_constant
        - max_block_body_size
        - max_block_header_size
        - max_transaction_size
        - stake_credential_deposit
        - stake_pool_deposit
        - stake_pool_retirement_epoch_bound
        - desired_number_of_stake_pools
        - stake_pool_pledge_influence
        - monetary_expansion
        - treasury_expansion
        - min_stake_pool_cost
        - min_utxo_deposit_constant
        - min_utxo_deposit_coefficient
        - plutus_cost_models
        - script_execution_prices
        - max_execution_units_per_transaction
        - max_execution_units_per_block
        - max_value_size
        - collateral_percentage
        - max_collateral_inputs
        - version
      properties:
        collateral_percentage:
          type: integer
          format: int64
        constitutional_committee_max_term_length:
          type: integer
          format: int64
          nullable: true
        constitutional_committee_min_size:
          type: integer
          format: int64
          nullable: true
        delegate_representative_deposit:
          allOf:
            - $ref: '#/components/schemas/DelegateRepresentativeDeposit'
          nullable: true
        delegate_representative_max_idle_time:
          type: integer
          format: int64
          nullable: true
        delegate_representative_voting_thresholds:
          allOf:
            - $ref: '#/components/schemas/DelegateRepresentativeVotingThresholds'
          nullable: true
        desired_number_of_stake_pools:
          type: integer
          format: int64
        governance_action_deposit:
          allOf:
            - $ref: '#/components/schemas/GovernanceActionDeposit'
          nullable: true
        governance_action_lifetime:
          type: integer
          format: int64
          nullable: true
        max_block_body_size:
          $ref: '#/components/schemas/MaxBlockBodySize'
        max_block_header_size:
          $ref: '#/components/schemas/MaxBlockHeaderSize'
        max_collateral_inputs:
          type: integer
          format: int64
        max_execution_units_per_block:
          $ref: '#/components/schemas/MaxExecutionUnits'
        max_execution_units_per_transaction:
          $ref: '#/components/schemas/MaxExecutionUnits'
        max_reference_scripts_size:
          allOf:
            - $ref: '#/components/schemas/MaxReferenceScriptsSize'
          nullable: true
        max_transaction_size:
          $ref: '#/components/schemas/MaxTransactionSize'
        max_value_size:
          $ref: '#/components/schemas/MaxValueSize'
        min_fee_coefficient:
          type: integer
          format: int64
        min_fee_constant:
          $ref: '#/components/schemas/MinFeeConstant'
        min_fee_reference_scripts:
          allOf:
            - $ref: '#/components/schemas/MinFeeReferenceScripts'
          nullable: true
        min_stake_pool_cost:
          $ref: '#/components/schemas/MinStakePoolCost'
        min_utxo_deposit_coefficient:
          type: integer
          format: int64
        min_utxo_deposit_constant:
          $ref: '#/components/schemas/MinUtxoDepositConstant'
        monetary_expansion:
          type: string
        plutus_cost_models:
          $ref: '#/components/schemas/PlutusCostModels'
        script_execution_prices:
          $ref: '#/components/schemas/ScriptExecutionPrices'
        stake_credential_deposit:
          $ref: '#/components/schemas/StakeDeposit'
        stake_pool_deposit:
          $ref: '#/components/schemas/StakeDeposit'
        stake_pool_pledge_influence:
          type: string
        stake_pool_retirement_epoch_bound:
          type: integer
          format: int64
        stake_pool_voting_thresholds:
          allOf:
            - $ref: '#/components/schemas/StakePoolVotingThresholds'
          nullable: true
        treasury_expansion:
          type: string
        version:
          $ref: '#/components/schemas/Version'
    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
    DelegateRepresentativeDeposit:
      type: object
      description: DRep action deposit (introduced in Conway)
      required:
        - ada
      properties:
        ada:
          $ref: '#/components/schemas/Ada'
    DelegateRepresentativeVotingThresholds:
      type: object
      description: DRep voting thresholds (introduced in Conway)
      required:
        - no_confidence
        - constitutional_committee
        - constitution
        - hard_fork_initiation
        - protocol_parameters_update
        - treasury_withdrawals
      properties:
        constitution:
          type: string
        constitutional_committee:
          $ref: '#/components/schemas/ConstitutionalCommittee'
        hard_fork_initiation:
          type: string
        no_confidence:
          type: string
        protocol_parameters_update:
          $ref: '#/components/schemas/ProtocolParametersUpdateDRep'
        treasury_withdrawals:
          type: string
    GovernanceActionDeposit:
      type: object
      description: Governance action deposit (introduced in Conway)
      required:
        - ada
      properties:
        ada:
          $ref: '#/components/schemas/Ada'
    MaxBlockBodySize:
      type: object
      description: Maximum number of bytes allowed for a block body
      required:
        - bytes
      properties:
        bytes:
          type: integer
          format: int64
          description: Maximum number of bytes allowed for a block body
    MaxBlockHeaderSize:
      type: object
      description: Maximum number of bytes allowed for a block header
      required:
        - bytes
      properties:
        bytes:
          type: integer
          format: int64
          description: Maximum number of bytes allowed for a block header
    MaxExecutionUnits:
      type: object
      description: Maximum execution units
      required:
        - memory
        - cpu
      properties:
        cpu:
          type: integer
          format: int64
          description: Maximum execution CPU units
        memory:
          type: integer
          format: int64
          description: Maximum execution memory units
    MaxReferenceScriptsSize:
      type: object
      description: Maximum reference script size (introduced in Conway)
      required:
        - bytes
      properties:
        bytes:
          type: integer
          format: int64
    MaxTransactionSize:
      type: object
      description: Maximum number of bytes allowed for a transaction
      required:
        - bytes
      properties:
        bytes:
          type: integer
          format: int64
          description: Maximum number of bytes allowed for a transaction
    MaxValueSize:
      type: object
      description: Maximum value size
      required:
        - bytes
      properties:
        bytes:
          type: integer
          format: int64
          description: Maximum value size
    MinFeeConstant:
      type: object
      description: Minimum ADA fee
      required:
        - ada
      properties:
        ada:
          $ref: '#/components/schemas/Ada'
    MinFeeReferenceScripts:
      type: object
      description: Parameters for reference script fee calculation (introduced in Conway)
      required:
        - base
        - range
        - multiplier
      properties:
        base:
          type: number
          format: double
        multiplier:
          type: number
          format: double
        range:
          type: integer
          format: int64
    MinStakePoolCost:
      type: object
      description: Minimum stake pool cost
      required:
        - ada
      properties:
        ada:
          $ref: '#/components/schemas/Ada'
    MinUtxoDepositConstant:
      type: object
      description: Minimum UTxO deposit amount
      required:
        - ada
      properties:
        ada:
          $ref: '#/components/schemas/Ada'
    PlutusCostModels:
      type: object
      description: Plutus script execution cost models
      required:
        - plutus_v1
        - plutus_v2
      properties:
        plutus_v1:
          type: array
          items:
            type: integer
            format: int64
          description: Plutus script v1 execution cost model
        plutus_v2:
          type: array
          items:
            type: integer
            format: int64
          description: Plutus script v2 execution cost model
        plutus_v3:
          type: array
          items:
            type: integer
            format: int64
          description: Plutus script v3 execution cost model (introduced in Conway)
          nullable: true
    ScriptExecutionPrices:
      type: object
      description: Script execution prices
      required:
        - memory
        - cpu
      properties:
        cpu:
          type: string
          description: Script execution CPU price
        memory:
          type: string
          description: Script execution memory price
    StakeDeposit:
      type: object
      description: Stake deposit amount
      required:
        - ada
      properties:
        ada:
          $ref: '#/components/schemas/Ada'
    StakePoolVotingThresholds:
      type: object
      description: Stake pool voting thresholds (introduced in Conway)
      required:
        - no_confidence
        - constitutional_committee
        - hard_fork_initiation
        - protocol_parameters_update
      properties:
        constitutional_committee:
          $ref: '#/components/schemas/ConstitutionalCommittee'
        hard_fork_initiation:
          type: string
        no_confidence:
          type: string
        protocol_parameters_update:
          $ref: '#/components/schemas/ProtocolParametersUpdateStakePool'
    Version:
      type: object
      required:
        - major
        - minor
      properties:
        major:
          type: integer
          format: int32
        minor:
          type: integer
          format: int32
    Ada:
      type: object
      required:
        - lovelace
      properties:
        lovelace:
          type: integer
          format: int64
    ConstitutionalCommittee:
      type: object
      required:
        - default
        - state_of_no_confidence
      properties:
        default:
          type: string
        state_of_no_confidence:
          type: string
    ProtocolParametersUpdateDRep:
      type: object
      required:
        - network
        - economic
        - technical
        - governance
      properties:
        economic:
          type: string
        governance:
          type: string
        network:
          type: string
        technical:
          type: string
    ProtocolParametersUpdateStakePool:
      type: object
      required:
        - security
      properties:
        security:
          type: string
  securitySchemes:
    api-key:
      type: apiKey
      in: header
      name: api-key
      description: Project API Key

````