stacks-blockchain-api/docs/api/core-node/post-fee-transaction.schema.json

{
  "description": "POST request for estimated fee",
  "title": "TransactionFeeEstimateRequest",
  "type": "object",
  "additionalProperties": false,
  "required": [
    "transaction_payload"
  ],
  "properties": {
    "transaction_payload": {
      "type": "string"
    },
    "estimated_len": {
      "type": "integer"
    }
  }
}