diff --git a/client/accounts.go b/client/accounts.go
index 1bde9a1..da2e686 100644
--- a/client/accounts.go
+++ b/client/accounts.go
@@ -3,6 +3,7 @@ package client
 import (
 	"encoding/json"
 	"fmt"
+	"net/http"
 
 	"github.com/maestro-org/go-sdk/models"
 	"github.com/maestro-org/go-sdk/utils"
@@ -21,6 +22,9 @@ func (c *Client) AccountAddresses(
 	if err != nil {
 		return nil, err
 	}
+	if resp.StatusCode != http.StatusOK {
+		return nil, fmt.Errorf("unexpected error: %d", resp.Body)
+	}
 	defer resp.Body.Close()
 	var accountAddresses models.AccountAddresses
 	err = json.NewDecoder(resp.Body).Decode(&accountAddresses)
@@ -43,6 +47,9 @@ func (c *Client) AccountAssets(
 	if err != nil {
 		return nil, err
 	}
+	if resp.StatusCode != http.StatusOK {
+		return nil, fmt.Errorf("unexpected error: %d", resp.Body)
+	}
 	defer resp.Body.Close()
 	var accountAssets models.AccountAssets
 	err = json.NewDecoder(resp.Body).Decode(&accountAssets)
@@ -65,6 +72,9 @@ func (c *Client) StakeAccountHistory(
 	if err != nil {
 		return nil, err
 	}
+	if resp.StatusCode != http.StatusOK {
+		return nil, fmt.Errorf("unexpected error: %d", resp.Body)
+	}
 	defer resp.Body.Close()
 	var stakeAccountHistory models.StakeAccountHistory
 	err = json.NewDecoder(resp.Body).Decode(&stakeAccountHistory)
@@ -82,6 +92,10 @@ func (c *Client) StakeAccountInformation(
 	if err != nil {
 		return nil, err
 	}
+	if resp.StatusCode != http.StatusOK {
+		return nil, fmt.Errorf("unexpected error: %d", resp.Body)
+	}
+
 	defer resp.Body.Close()
 	var stakeAccountInformation models.StakeAccountInformation
 	err = json.NewDecoder(resp.Body).Decode(&stakeAccountInformation)
@@ -104,6 +118,9 @@ func (c *Client) StakeAccountRewards(
 	if err != nil {
 		return nil, err
 	}
+	if resp.StatusCode != http.StatusOK {
+		return nil, fmt.Errorf("unexpected error: %d", resp.Body)
+	}
 	defer resp.Body.Close()
 	var stakeAccountRewards models.StakeAccountRewards
 	err = json.NewDecoder(resp.Body).Decode(&stakeAccountRewards)
@@ -126,6 +143,9 @@ func (c *Client) StakeAccountUpdates(
 	if err != nil {
 		return nil, err
 	}
+	if resp.StatusCode != http.StatusOK {
+		return nil, fmt.Errorf("unexpected error: %d", resp.Body)
+	}
 	defer resp.Body.Close()
 	var stakeAccountUpdates models.StakeAccountUpdates
 	err = json.NewDecoder(resp.Body).Decode(&stakeAccountUpdates)
diff --git a/client/addresses.go b/client/addresses.go
index b7e31d7..2086e98 100644
--- a/client/addresses.go
+++ b/client/addresses.go
@@ -3,6 +3,7 @@ package client
 import (
 	"encoding/json"
 	"fmt"
+	"net/http"
 
 	"github.com/maestro-org/go-sdk/models"
 	"github.com/maestro-org/go-sdk/utils"
@@ -14,6 +15,9 @@ func (c *Client) DecodeAddress(address string) (*models.DecodedAddress, error) {
 	if err != nil {
 		return nil, err
 	}
+	if resp.StatusCode != http.StatusOK {
+		return nil, fmt.Errorf("unexpected error: %d", resp.Body)
+	}
 	defer resp.Body.Close()
 	var decodedAddress models.DecodedAddress
 	err = json.NewDecoder(resp.Body).Decode(&decodedAddress)
@@ -29,6 +33,9 @@ func (c *Client) AddressTransactionCount(address string) (*models.AddressTransac
 	if err != nil {
 		return nil, err
 	}
+	if resp.StatusCode != http.StatusOK {
+		return nil, fmt.Errorf("unexpected error: %d", resp.Body)
+	}
 	defer resp.Body.Close()
 	var addressTransactionCount models.AddressTransactionCount
 	err = json.NewDecoder(resp.Body).Decode(&addressTransactionCount)
@@ -51,6 +58,9 @@ func (c *Client) AddressTransactions(
 	if err != nil {
 		return nil, err
 	}
+	if resp.StatusCode != http.StatusOK {
+		return nil, fmt.Errorf("unexpected error: %d", resp.Body)
+	}
 	defer resp.Body.Close()
 	var addressTransactions models.AddressTransactions
 	err = json.NewDecoder(resp.Body).Decode(&addressTransactions)
@@ -73,6 +83,9 @@ func (c *Client) PaymentCredentialTransactions(
 	if err != nil {
 		return nil, err
 	}
+	if resp.StatusCode != http.StatusOK {
+		return nil, fmt.Errorf("unexpected error: %d", resp.Body)
+	}
 	defer resp.Body.Close()
 	var addressTransactions models.AddressTransactions
 	err = json.NewDecoder(resp.Body).Decode(&addressTransactions)
@@ -95,6 +108,9 @@ func (c *Client) UtxoReferencesAtAddress(
 	if err != nil {
 		return nil, err
 	}
+	if resp.StatusCode != http.StatusOK {
+		return nil, fmt.Errorf("unexpected error: %d", resp.Body)
+	}
 	defer resp.Body.Close()
 	var utxoReferencesAtAddress models.UtxoReferencesAtAddress
 	err = json.NewDecoder(resp.Body).Decode(&utxoReferencesAtAddress)
@@ -117,6 +133,9 @@ func (c *Client) UtxosAtAddress(
 	if err != nil {
 		return nil, err
 	}
+	if resp.StatusCode != http.StatusOK {
+		return nil, fmt.Errorf("unexpected error: %d", resp.Body)
+	}
 	defer resp.Body.Close()
 	var utxosAtAddress models.UtxosAtAddress
 	err = json.NewDecoder(resp.Body).Decode(&utxosAtAddress)
@@ -140,6 +159,9 @@ func (c *Client) UtxosAtAddresses(
 	if err != nil {
 		return nil, err
 	}
+	if resp.StatusCode != http.StatusOK {
+		return nil, fmt.Errorf("unexpected error: %d", resp.Body)
+	}
 	defer resp.Body.Close()
 	var utxosAtAddress models.UtxosAtAddress
 	err = json.NewDecoder(resp.Body).Decode(&utxosAtAddress)
@@ -162,6 +184,9 @@ func (c *Client) UtxosByPaymentCredential(
 	if err != nil {
 		return nil, err
 	}
+	if resp.StatusCode != http.StatusOK {
+		return nil, fmt.Errorf("unexpected error: %d", resp.Body)
+	}
 	defer resp.Body.Close()
 	var utxosAtAddress models.UtxosAtAddress
 	err = json.NewDecoder(resp.Body).Decode(&utxosAtAddress)
diff --git a/client/asset.go b/client/asset.go
index e09184e..42ebe51 100644
--- a/client/asset.go
+++ b/client/asset.go
@@ -3,6 +3,7 @@ package client
 import (
 	"encoding/json"
 	"fmt"
+	"net/http"
 
 	"github.com/maestro-org/go-sdk/models"
 	"github.com/maestro-org/go-sdk/utils"
@@ -21,6 +22,9 @@ func (c *Client) AccountsHoldingAsset(
 	if err != nil {
 		return nil, err
 	}
+	if resp.StatusCode != http.StatusOK {
+		return nil, fmt.Errorf("unexpected error: %d", resp.Body)
+	}
 	defer resp.Body.Close()
 	var accountsHoldingAsset models.AccountsHoldingAsset
 	err = json.NewDecoder(resp.Body).Decode(&accountsHoldingAsset)
@@ -43,6 +47,9 @@ func (c *Client) AddressHoldingAsset(
 	if err != nil {
 		return nil, err
 	}
+	if resp.StatusCode != http.StatusOK {
+		return nil, fmt.Errorf("unexpected error: %d", resp.Body)
+	}
 	defer resp.Body.Close()
 	var addressesHoldingAsset models.AddressesHoldingAsset
 	err = json.NewDecoder(resp.Body).Decode(&addressesHoldingAsset)
@@ -58,6 +65,9 @@ func (c *Client) Asset(assetId string) (*models.AssetInformations, error) {
 	if err != nil {
 		return nil, err
 	}
+	if resp.StatusCode != http.StatusOK {
+		return nil, fmt.Errorf("unexpected error: %d", resp.Body)
+	}
 	defer resp.Body.Close()
 	var assetInformation models.AssetInformations
 	err = json.NewDecoder(resp.Body).Decode(&assetInformation)
@@ -80,6 +90,9 @@ func (c *Client) AssetTransactions(
 	if err != nil {
 		return nil, err
 	}
+	if resp.StatusCode != http.StatusOK {
+		return nil, fmt.Errorf("unexpected error: %d", resp.Body)
+	}
 	defer resp.Body.Close()
 	var assetTransactions models.AssetTransactions
 	err = json.NewDecoder(resp.Body).Decode(&assetTransactions)
@@ -102,6 +115,9 @@ func (c *Client) AssetUpdates(
 	if err != nil {
 		return nil, err
 	}
+	if resp.StatusCode != http.StatusOK {
+		return nil, fmt.Errorf("unexpected error: %d", resp.Body)
+	}
 	defer resp.Body.Close()
 	var assetUpdates models.AssetUpdates
 	err = json.NewDecoder(resp.Body).Decode(&assetUpdates)
@@ -122,6 +138,9 @@ func (c *Client) AssetUtxos(assetId string, params *utils.Parameters) (*models.A
 	if err != nil {
 		return nil, err
 	}
+	if resp.StatusCode != http.StatusOK {
+		return nil, fmt.Errorf("unexpected error: %d", resp.Body)
+	}
 	defer resp.Body.Close()
 	var assetUtxos models.AssetUtxos
 	err = json.NewDecoder(resp.Body).Decode(&assetUtxos)
diff --git a/client/asset_policy.go b/client/asset_policy.go
index 2c34e0e..2fc7cbf 100644
--- a/client/asset_policy.go
+++ b/client/asset_policy.go
@@ -3,6 +3,7 @@ package client
 import (
 	"encoding/json"
 	"fmt"
+	"net/http"
 
 	"github.com/maestro-org/go-sdk/models"
 	"github.com/maestro-org/go-sdk/utils"
@@ -21,6 +22,9 @@ func (c *Client) AccountsHoldingPolicy(
 	if err != nil {
 		return nil, err
 	}
+	if resp.StatusCode != http.StatusOK {
+		return nil, fmt.Errorf("unexpected error: %d", resp.Body)
+	}
 	defer resp.Body.Close()
 	var response models.AccountsHoldingPolicy
 	err = json.NewDecoder(resp.Body).Decode(&response)
@@ -43,6 +47,9 @@ func (c *Client) AddressesHoldingPolicy(
 	if err != nil {
 		return nil, err
 	}
+	if resp.StatusCode != http.StatusOK {
+		return nil, fmt.Errorf("unexpected error: %d", resp.Body)
+	}
 	defer resp.Body.Close()
 	var response models.AddressesHoldingPolicy
 	err = json.NewDecoder(resp.Body).Decode(&response)
@@ -65,6 +72,9 @@ func (c *Client) SpecificPolicyInformations(
 	if err != nil {
 		return nil, err
 	}
+	if resp.StatusCode != http.StatusOK {
+		return nil, fmt.Errorf("unexpected error: %d", resp.Body)
+	}
 	defer resp.Body.Close()
 	var response models.PolicyInformation
 	err = json.NewDecoder(resp.Body).Decode(&response)
@@ -87,6 +97,9 @@ func (c *Client) TransactionsMovingPolicy(
 	if err != nil {
 		return nil, err
 	}
+	if resp.StatusCode != http.StatusOK {
+		return nil, fmt.Errorf("unexpected error: %d", resp.Body)
+	}
 	defer resp.Body.Close()
 	var response models.PolicyTransactions
 	err = json.NewDecoder(resp.Body).Decode(&response)
@@ -109,6 +122,9 @@ func (c *Client) UtxosContainingPolicy(
 	if err != nil {
 		return nil, err
 	}
+	if resp.StatusCode != http.StatusOK {
+		return nil, fmt.Errorf("unexpected error: %d", resp.Body)
+	}
 	defer resp.Body.Close()
 	var response models.UtxosContainingPolicy
 	err = json.NewDecoder(resp.Body).Decode(&response)
diff --git a/client/datum.go b/client/datum.go
index 17be2ce..6333ad6 100644
--- a/client/datum.go
+++ b/client/datum.go
@@ -3,6 +3,7 @@ package client
 import (
 	"encoding/json"
 	"fmt"
+	"net/http"
 
 	"github.com/maestro-org/go-sdk/models"
 )
@@ -13,6 +14,9 @@ func (c *Client) DatumFromHash(hash string) (*models.DatumFromHash, error) {
 	if err != nil {
 		return nil, err
 	}
+	if resp.StatusCode != http.StatusOK {
+		return nil, fmt.Errorf("unexpected error: %d", resp.Body)
+	}
 	defer resp.Body.Close()
 	var datum models.DatumFromHash
 	err = json.NewDecoder(resp.Body).Decode(&datum)
diff --git a/client/ecosystem.go b/client/ecosystem.go
index aa4c386..b22f190 100644
--- a/client/ecosystem.go
+++ b/client/ecosystem.go
@@ -3,6 +3,7 @@ package client
 import (
 	"encoding/json"
 	"fmt"
+	"net/http"
 
 	"github.com/maestro-org/go-sdk/models"
 )
@@ -13,6 +14,9 @@ func (c *Client) ResolveAdaHandle(handle string) (*models.BasicResponse, error)
 	if err != nil {
 		return nil, err
 	}
+	if resp.StatusCode != http.StatusOK {
+		return nil, fmt.Errorf("unexpected error: %d", resp.Body)
+	}
 	defer resp.Body.Close()
 	var adaHandle models.BasicResponse
 	err = json.NewDecoder(resp.Body).Decode(&adaHandle)
diff --git a/client/epochs.go b/client/epochs.go
index 22276c4..ec27e12 100644
--- a/client/epochs.go
+++ b/client/epochs.go
@@ -3,6 +3,7 @@ package client
 import (
 	"encoding/json"
 	"fmt"
+	"net/http"
 
 	"github.com/maestro-org/go-sdk/models"
 )
@@ -13,6 +14,9 @@ func (c *Client) CurrentEpoch() (*models.EpochResp, error) {
 	if err != nil {
 		return nil, err
 	}
+	if resp.StatusCode != http.StatusOK {
+		return nil, fmt.Errorf("unexpected error: %d", resp.Body)
+	}
 	defer resp.Body.Close()
 	var currentEpoch models.EpochResp
 	err = json.NewDecoder(resp.Body).Decode(&currentEpoch)
@@ -28,6 +32,9 @@ func (c *Client) SpecificEpoch(epochNo int) (*models.EpochResp, error) {
 	if err != nil {
 		return nil, err
 	}
+	if resp.StatusCode != http.StatusOK {
+		return nil, fmt.Errorf("unexpected error: %d", resp.Body)
+	}
 	defer resp.Body.Close()
 	var specificEpoch models.EpochResp
 	err = json.NewDecoder(resp.Body).Decode(&specificEpoch)
diff --git a/client/general.go b/client/general.go
index c74ef22..d89a924 100644
--- a/client/general.go
+++ b/client/general.go
@@ -2,6 +2,8 @@ package client
 
 import (
 	"encoding/json"
+	"fmt"
+	"net/http"
 
 	"github.com/maestro-org/go-sdk/models"
 )
@@ -12,6 +14,9 @@ func (c *Client) ChainTip() (*models.ChainTip, error) {
 	if err != nil {
 		return nil, err
 	}
+	if resp.StatusCode != http.StatusOK {
+		return nil, fmt.Errorf("unexpected error: %d", resp.Body)
+	}
 	defer resp.Body.Close()
 	var chainTip models.ChainTip
 	err = json.NewDecoder(resp.Body).Decode(&chainTip)
@@ -27,6 +32,9 @@ func (c *Client) EraHistory() (*models.EraHistory, error) {
 	if err != nil {
 		return nil, err
 	}
+	if resp.StatusCode != http.StatusOK {
+		return nil, fmt.Errorf("unexpected error: %d", resp.Body)
+	}
 	defer resp.Body.Close()
 	var eraHistory models.EraHistory
 	err = json.NewDecoder(resp.Body).Decode(&eraHistory)
@@ -42,6 +50,9 @@ func (c *Client) ProtocolParameters() (*models.ProtocolParameters, error) {
 	if err != nil {
 		return nil, err
 	}
+	if resp.StatusCode != http.StatusOK {
+		return nil, fmt.Errorf("unexpected error: %d", resp.Body)
+	}
 	defer resp.Body.Close()
 	var protocolParameters models.ProtocolParameters
 	err = json.NewDecoder(resp.Body).Decode(&protocolParameters)
@@ -57,6 +68,9 @@ func (c *Client) BlockChainStartTime() (models.BasicResponse, error) {
 	if err != nil {
 		return models.BasicResponse{}, err
 	}
+	if resp.StatusCode != http.StatusOK {
+		return models.BasicResponse{}, fmt.Errorf("unexpected error: %d", resp.Body)
+	}
 	defer resp.Body.Close()
 	var blockchainStartTime models.BasicResponse
 	err = json.NewDecoder(resp.Body).Decode(&blockchainStartTime)
diff --git a/client/linear_vesting.go b/client/linear_vesting.go
index 1e52d3b..2f668df 100644
--- a/client/linear_vesting.go
+++ b/client/linear_vesting.go
@@ -3,6 +3,7 @@ package client
 import (
 	"encoding/json"
 	"fmt"
+	"net/http"
 
 	"github.com/maestro-org/go-sdk/models"
 )
@@ -27,6 +28,9 @@ func (c *Client) LockAssets(lockBody LockBody) (*models.LockTransaction, error)
 	if err != nil {
 		return nil, err
 	}
+	if resp.StatusCode != http.StatusOK {
+		return nil, fmt.Errorf("unexpected error: %d", resp.Body)
+	}
 	defer resp.Body.Close()
 	var lockTransaction models.LockTransaction
 	err = json.NewDecoder(resp.Body).Decode(&lockTransaction)
@@ -42,6 +46,9 @@ func (c *Client) StateOfVestingAssets(beneficiary string) (*[]models.VestingStat
 	if err != nil {
 		return nil, err
 	}
+	if resp.StatusCode != http.StatusOK {
+		return nil, fmt.Errorf("unexpected error: %d", resp.Body)
+	}
 	defer resp.Body.Close()
 	var vestingStates []models.VestingState
 	err = json.NewDecoder(resp.Body).Decode(&vestingStates)
@@ -58,6 +65,9 @@ func (c *Client) CollectAssets(beneficiary string) (*models.CollectTransaction,
 	if err != nil {
 		return nil, err
 	}
+	if resp.StatusCode != http.StatusOK {
+		return nil, fmt.Errorf("unexpected error: %d", resp.Body)
+	}
 	defer resp.Body.Close()
 	var collectTransaction models.CollectTransaction
 	err = json.NewDecoder(resp.Body).Decode(&collectTransaction)
diff --git a/client/pools.go b/client/pools.go
index b22cc07..9c94f02 100644
--- a/client/pools.go
+++ b/client/pools.go
@@ -3,6 +3,7 @@ package client
 import (
 	"encoding/json"
 	"fmt"
+	"net/http"
 
 	"github.com/maestro-org/go-sdk/models"
 	"github.com/maestro-org/go-sdk/utils"
@@ -18,6 +19,9 @@ func (c *Client) ListOfRegisteredPools(params *utils.Parameters) (*models.Regist
 	if err != nil {
 		return nil, err
 	}
+	if resp.StatusCode != http.StatusOK {
+		return nil, fmt.Errorf("unexpected error: %d", resp.Body)
+	}
 	defer resp.Body.Close()
 	var registeredPools models.RegisteredPools
 	err = json.NewDecoder(resp.Body).Decode(&registeredPools)
@@ -40,6 +44,9 @@ func (c *Client) StakePoolMintedBlocks(
 	if err != nil {
 		return nil, err
 	}
+	if resp.StatusCode != http.StatusOK {
+		return nil, fmt.Errorf("unexpected error: %d", resp.Body)
+	}
 	defer resp.Body.Close()
 	var poolMintedBlocks models.PoolMintedBlocks
 	err = json.NewDecoder(resp.Body).Decode(&poolMintedBlocks)
@@ -62,6 +69,9 @@ func (c *Client) StakePoolDelegators(
 	if err != nil {
 		return nil, err
 	}
+	if resp.StatusCode != http.StatusOK {
+		return nil, fmt.Errorf("unexpected error: %d", resp.Body)
+	}
 	defer resp.Body.Close()
 	var stakePoolDelegators models.StakePoolDelegators
 	err = json.NewDecoder(resp.Body).Decode(&stakePoolDelegators)
@@ -84,6 +94,9 @@ func (c *Client) StakePoolHistory(
 	if err != nil {
 		return nil, err
 	}
+	if resp.StatusCode != http.StatusOK {
+		return nil, fmt.Errorf("unexpected error: %d", resp.Body)
+	}
 	defer resp.Body.Close()
 	var stakePoolHistory models.StakePoolHistory
 	err = json.NewDecoder(resp.Body).Decode(&stakePoolHistory)
@@ -99,6 +112,9 @@ func (c *Client) StakePoolInformation(poolId string) (*models.StakePoolInformati
 	if err != nil {
 		return nil, err
 	}
+	if resp.StatusCode != http.StatusOK {
+		return nil, fmt.Errorf("unexpected error: %d", resp.Body)
+	}
 	defer resp.Body.Close()
 	var stakePoolInformation models.StakePoolInformation
 	err = json.NewDecoder(resp.Body).Decode(&stakePoolInformation)
@@ -114,6 +130,9 @@ func (c *Client) StakePoolMetadata(poolId string) (*models.StakePoolMetadata, er
 	if err != nil {
 		return nil, err
 	}
+	if resp.StatusCode != http.StatusOK {
+		return nil, fmt.Errorf("unexpected error: %d", resp.Body)
+	}
 	defer resp.Body.Close()
 	var stakePoolMetadata models.StakePoolMetadata
 	err = json.NewDecoder(resp.Body).Decode(&stakePoolMetadata)
@@ -129,6 +148,9 @@ func (c *Client) StakePoolRelays(poolId string) (*models.StakePoolRelays, error)
 	if err != nil {
 		return nil, err
 	}
+	if resp.StatusCode != http.StatusOK {
+		return nil, fmt.Errorf("unexpected error: %d", resp.Body)
+	}
 	defer resp.Body.Close()
 	var stakePoolRelays models.StakePoolRelays
 	err = json.NewDecoder(resp.Body).Decode(&stakePoolRelays)
@@ -145,6 +167,9 @@ func (c *Client) StakePoolUpdates(poolId string) (*models.StakePoolUpdates, erro
 	if err != nil {
 		return nil, err
 	}
+	if resp.StatusCode != http.StatusOK {
+		return nil, fmt.Errorf("unexpected error: %d", resp.Body)
+	}
 	defer resp.Body.Close()
 	var stakePoolUpdates models.StakePoolUpdates
 	err = json.NewDecoder(resp.Body).Decode(&stakePoolUpdates)
diff --git a/client/scripts.go b/client/scripts.go
index a67e46a..614fe7f 100644
--- a/client/scripts.go
+++ b/client/scripts.go
@@ -3,6 +3,7 @@ package client
 import (
 	"encoding/json"
 	"fmt"
+	"net/http"
 
 	"github.com/maestro-org/go-sdk/models"
 )
@@ -13,6 +14,9 @@ func (c *Client) ScriptByHash(hash string) (*models.ScriptByHash, error) {
 	if err != nil {
 		return nil, err
 	}
+	if resp.StatusCode != http.StatusOK {
+		return nil, fmt.Errorf("unexpected error: %d", resp.Body)
+	}
 	defer resp.Body.Close()
 	var scriptByHash models.ScriptByHash
 	err = json.NewDecoder(resp.Body).Decode(&scriptByHash)
diff --git a/client/transactions.go b/client/transactions.go
index 795f1a5..72d81a9 100644
--- a/client/transactions.go
+++ b/client/transactions.go
@@ -3,6 +3,7 @@ package client
 import (
 	"encoding/json"
 	"fmt"
+	"net/http"
 
 	"github.com/maestro-org/go-sdk/models"
 	"github.com/maestro-org/go-sdk/utils"
@@ -14,6 +15,9 @@ func (c *Client) AddressByOutputReference(txHash string, index int) (*models.Bas
 	if err != nil {
 		return nil, err
 	}
+	if resp.StatusCode != http.StatusOK {
+		return nil, fmt.Errorf("unexpected error: %d", resp.Body)
+	}
 	defer resp.Body.Close()
 	var addressByOutputReference models.BasicResponse
 	err = json.NewDecoder(resp.Body).Decode(&addressByOutputReference)
@@ -30,6 +34,9 @@ func (c *Client) SubmitTx(cbor string) (models.BasicResponse, error) {
 	if err != nil {
 		return models.BasicResponse{}, err
 	}
+	if resp.StatusCode != http.StatusOK {
+		return models.BasicResponse{}, fmt.Errorf("unexpected error: %d", resp.Body)
+	}
 	defer resp.Body.Close()
 	var submitTx models.BasicResponse
 
@@ -46,6 +53,9 @@ func (c *Client) TransactionCbor(txHash string) (*models.BasicResponse, error) {
 	if err != nil {
 		return nil, err
 	}
+	if resp.StatusCode != http.StatusOK {
+		return nil, fmt.Errorf("unexpected error: %d", resp.Body)
+	}
 	defer resp.Body.Close()
 	var transactionCbor models.BasicResponse
 	err = json.NewDecoder(resp.Body).Decode(&transactionCbor)
@@ -62,6 +72,9 @@ func (c *Client) TransactionDetails(txHash string) (*models.TransactionDetails,
 	if err != nil {
 		return nil, err
 	}
+	if resp.StatusCode != http.StatusOK {
+		return nil, fmt.Errorf("unexpected error: %d", resp.Body)
+	}
 	defer resp.Body.Close()
 	var transactionDetails models.TransactionDetails
 	err = json.NewDecoder(resp.Body).Decode(&transactionDetails)
@@ -86,6 +99,9 @@ func (c *Client) TransactionOutputFromReference(
 	if err != nil {
 		return nil, err
 	}
+	if resp.StatusCode != http.StatusOK {
+		return nil, fmt.Errorf("unexpected error: %d", resp.Body)
+	}
 	defer resp.Body.Close()
 	var transactionOutputFromReference models.TransactionOutputFromReference
 	err = json.NewDecoder(resp.Body).Decode(&transactionOutputFromReference)
@@ -109,6 +125,9 @@ func (c *Client) TransactionOutputsFromReferences(
 	if err != nil {
 		return nil, err
 	}
+	if resp.StatusCode != http.StatusOK {
+		return nil, fmt.Errorf("unexpected error: %d", resp.Body)
+	}
 	defer resp.Body.Close()
 	var transactionOutputsFromReferences models.TransactionOutputsFromReferences
 	err = json.NewDecoder(resp.Body).Decode(&transactionOutputsFromReferences)
@@ -129,6 +148,9 @@ func (c *Client) EvaluateTx(txCbor string, AdditionalUtxos ...string) ([]models.
 	if err != nil {
 		return nil, err
 	}
+	if resp.StatusCode != http.StatusOK {
+		return nil, fmt.Errorf("unexpected error: %d", resp.Body)
+	}
 	defer resp.Body.Close()
 	var redeemerEvals []models.RedeemerEvaluation
 	err = json.NewDecoder(resp.Body).Decode(&redeemerEvals)
diff --git a/client/txmanager.go b/client/txmanager.go
index d17eab5..fbbcbe2 100644
--- a/client/txmanager.go
+++ b/client/txmanager.go
@@ -5,6 +5,7 @@ import (
 	"encoding/json"
 	"fmt"
 	"io"
+	"net/http"
 
 	"github.com/maestro-org/go-sdk/models"
 )
@@ -15,6 +16,9 @@ func (c *Client) TxManagerHistory() (*[]models.TxManagerState, error) {
 	if err != nil {
 		return nil, err
 	}
+	if resp.StatusCode != http.StatusOK {
+		return nil, fmt.Errorf("unexpected error: %d", resp.Body)
+	}
 	defer resp.Body.Close()
 	var txManagerStates []models.TxManagerState
 	err = json.NewDecoder(resp.Body).Decode(&txManagerStates)
@@ -34,6 +38,9 @@ func (c *Client) TxManagerSubmit(txHex string) (string, error) {
 	if err != nil {
 		return "", err
 	}
+	if resp.StatusCode != http.StatusOK {
+		return "", fmt.Errorf("unexpected error: %d", resp.Body)
+	}
 	defer resp.Body.Close()
 	bodyBytes, err := io.ReadAll(resp.Body)
 	if err != nil {
@@ -53,6 +60,9 @@ func (c *Client) TxManagerSubmitTurbo(txHex string) (string, error) {
 	if err != nil {
 		return "", err
 	}
+	if resp.StatusCode != http.StatusOK {
+		return "", fmt.Errorf("unexpected error: %d", resp.Body)
+	}
 	defer resp.Body.Close()
 	bodyBytes, err := io.ReadAll(resp.Body)
 	if err != nil {
@@ -68,6 +78,9 @@ func (c *Client) TxManagerState(txHash string) (*models.TxManagerState, error) {
 	if err != nil {
 		return nil, err
 	}
+	if resp.StatusCode != http.StatusOK {
+		return nil, fmt.Errorf("unexpected error: %d", resp.Body)
+	}
 	defer resp.Body.Close()
 	var txManagerState models.TxManagerState
 	err = json.NewDecoder(resp.Body).Decode(&txManagerState)