v1

latestOpenAPI 3.0.0MIT2026-07-17124105392.5 KB
Cardano » Governance

Specific parameters proposal

Parameters proposal details.

get/governance/proposals/{tx_hash}/{cert_index}/parameters

Path parameters

tx_hashstring required

Transaction hash.

cert_indexinteger required

Index of the certificate within the proposal transaction.

Response

Return the proposal parameters content

idstring required

Governance Action Identifier (CIP-0129)

tx_hashstring required

Off-chain metadata of a proposal with a specific transaction hash

cert_indexinteger required

Off-chain metadata of a proposal with a specific transaction cert_index

Example response

{
  "parameters": {
    "epoch": 225,
    "min_fee_a": 44,
    "min_fee_b": 155381,
    "max_block_size": 65536,
    "max_tx_size": 16384,
    "max_block_header_size": 1100,
    "key_deposit": "2000000",
    "pool_deposit": "500000000",
    "e_max": 18,
    "n_opt": 150,
    "a0": 0.3,
    "rho": 0.003,
    "tau": 0.2,
    "decentralisation_param": 0.5,
    "protocol_major_ver": 2,
    "min_utxo": "1000000",
    "min_pool_cost": "340000000",
    "cost_models": {
      "PlutusV1": [
        197209,
        0
      ],
      "PlutusV2": [
        197209,
        0
      ]
    },
    "price_mem": 0.0577,
    "price_step": 0.0000721,
    "max_tx_ex_mem": "10000000",
    "max_tx_ex_steps": "10000000000",
    "max_block_ex_mem": "50000000",
    "max_block_ex_steps": "40000000000",
    "max_val_size": "5000",
    "collateral_percent": 150,
    "max_collateral_inputs": 3,
    "coins_per_utxo_size": "34482",
    "coins_per_utxo_word": "34482"
  }
}