diff --git a/btc/summary.go b/btc/summary.go
index 17638c6..622b357 100644
--- a/btc/summary.go
+++ b/btc/summary.go
@@ -7,13 +7,12 @@ import (
 	"github.com/lightninglabs/chantools/dataformat"
 )
 
-func SummarizeChannels(apiURL string, channels []*dataformat.SummaryEntry,
+func SummarizeChannels(api *ExplorerAPI, channels []*dataformat.SummaryEntry,
 	log btclog.Logger) (*dataformat.SummaryEntryFile, error) {
 
 	summaryFile := &dataformat.SummaryEntryFile{
 		Channels: channels,
 	}
-	api := &ExplorerAPI{BaseURL: apiURL}
 
 	for idx, channel := range channels {
 		tx, err := api.Transaction(channel.FundingTXID)
diff --git a/cmd/chantools/closepoolaccount.go b/cmd/chantools/closepoolaccount.go
index dc85a28..fa8cf0a 100644
--- a/cmd/chantools/closepoolaccount.go
+++ b/cmd/chantools/closepoolaccount.go
@@ -10,7 +10,6 @@ import (
 	"github.com/btcsuite/btcd/btcutil/hdkeychain"
 	"github.com/btcsuite/btcd/txscript"
 	"github.com/btcsuite/btcd/wire"
-	"github.com/lightninglabs/chantools/btc"
 	"github.com/lightninglabs/chantools/lnd"
 	"github.com/lightninglabs/pool/account"
 	"github.com/lightninglabs/pool/poolscript"
@@ -165,7 +164,7 @@ func closePoolAccount(extendedKey *hdkeychain.ExtendedKey, apiURL string,
 		ExtendedKey: extendedKey,
 		ChainParams: chainParams,
 	}
-	api := &btc.ExplorerAPI{BaseURL: apiURL}
+	api := newExplorerAPI(apiURL)
 
 	tx, err := api.Transaction(outpoint.Hash.String())
 	if err != nil {
diff --git a/cmd/chantools/doublespendinputs.go b/cmd/chantools/doublespendinputs.go
index a7ea4e1..ece5d1c 100644
--- a/cmd/chantools/doublespendinputs.go
+++ b/cmd/chantools/doublespendinputs.go
@@ -13,7 +13,6 @@ import (
 	"github.com/btcsuite/btcd/txscript"
 	"github.com/btcsuite/btcd/wire"
 	"github.com/decred/dcrd/dcrec/secp256k1/v4"
-	"github.com/lightninglabs/chantools/btc"
 	"github.com/lightninglabs/chantools/lnd"
 	"github.com/lightningnetwork/lnd/input"
 	"github.com/lightningnetwork/lnd/lnwallet/chainfee"
@@ -93,7 +92,7 @@ func (c *doubleSpendInputs) Execute(_ *cobra.Command, _ []string) error {
 		return fmt.Errorf("inputoutpoints are required")
 	}
 
-	api := &btc.ExplorerAPI{BaseURL: c.APIURL}
+	api := newExplorerAPI(c.APIURL)
 
 	addresses := make([]btcutil.Address, 0, len(c.InputOutpoints))
 	outpoints := make([]*wire.OutPoint, 0, len(c.InputOutpoints))
diff --git a/cmd/chantools/forceclose.go b/cmd/chantools/forceclose.go
index 90ea393..f6362aa 100644
--- a/cmd/chantools/forceclose.go
+++ b/cmd/chantools/forceclose.go
@@ -11,7 +11,6 @@ import (
 
 	"github.com/btcsuite/btcd/btcutil/hdkeychain"
 	"github.com/btcsuite/btcd/txscript"
-	"github.com/lightninglabs/chantools/btc"
 	"github.com/lightninglabs/chantools/dataformat"
 	"github.com/lightninglabs/chantools/lnd"
 	"github.com/lightningnetwork/lnd/channeldb"
@@ -105,7 +104,7 @@ func forceCloseChannels(apiURL string, extendedKey *hdkeychain.ExtendedKey,
 	if err != nil {
 		return err
 	}
-	api := &btc.ExplorerAPI{BaseURL: apiURL}
+	api := newExplorerAPI(apiURL)
 	signer := &lnd.Signer{
 		ExtendedKey: extendedKey,
 		ChainParams: chainParams,
diff --git a/cmd/chantools/pullanchor.go b/cmd/chantools/pullanchor.go
index 7a4f890..ed438ba 100644
--- a/cmd/chantools/pullanchor.go
+++ b/cmd/chantools/pullanchor.go
@@ -132,7 +132,7 @@ func createPullTransactionTemplate(rootKey *hdkeychain.ExtendedKey,
 		ExtendedKey: rootKey,
 		ChainParams: chainParams,
 	}
-	api := &btc.ExplorerAPI{BaseURL: apiURL}
+	api := newExplorerAPI(apiURL)
 	estimator := input.TxWeightEstimator{}
 
 	// Make sure the sponsor input is a P2WPKH or P2TR input and is known
diff --git a/cmd/chantools/recoverloopin.go b/cmd/chantools/recoverloopin.go
index 52330c3..21654ce 100644
--- a/cmd/chantools/recoverloopin.go
+++ b/cmd/chantools/recoverloopin.go
@@ -9,7 +9,6 @@ import (
 	"github.com/btcsuite/btcd/chaincfg/chainhash"
 	"github.com/btcsuite/btcd/txscript"
 	"github.com/btcsuite/btcd/wire"
-	"github.com/lightninglabs/chantools/btc"
 	"github.com/lightninglabs/chantools/lnd"
 	"github.com/lightninglabs/loop"
 	"github.com/lightninglabs/loop/loopdb"
@@ -121,7 +120,7 @@ func (c *recoverLoopInCommand) Execute(_ *cobra.Command, _ []string) error {
 		return fmt.Errorf("sweep_addr is required")
 	}
 
-	api := &btc.ExplorerAPI{BaseURL: c.APIURL}
+	api := newExplorerAPI(c.APIURL)
 
 	signer := &lnd.Signer{
 		ExtendedKey: extendedKey,
diff --git a/cmd/chantools/rescuefunding.go b/cmd/chantools/rescuefunding.go
index 9e4e4cd..cc59219 100644
--- a/cmd/chantools/rescuefunding.go
+++ b/cmd/chantools/rescuefunding.go
@@ -9,7 +9,6 @@ import (
 	"github.com/btcsuite/btcd/btcutil"
 	"github.com/btcsuite/btcd/btcutil/psbt"
 	"github.com/btcsuite/btcd/wire"
-	"github.com/lightninglabs/chantools/btc"
 	"github.com/lightninglabs/chantools/lnd"
 	"github.com/lightningnetwork/lnd/input"
 	"github.com/lightningnetwork/lnd/keychain"
@@ -255,7 +254,7 @@ func rescueFunding(localKeyDesc *keychain.KeyDescriptor,
 	}
 
 	// Locate the output in the funding TX.
-	api := &btc.ExplorerAPI{BaseURL: apiURL}
+	api := newExplorerAPI(apiURL)
 	tx, err := api.Transaction(chainPoint.Hash.String())
 	if err != nil {
 		return fmt.Errorf("error fetching UTXO info for outpoint %s: "+
diff --git a/cmd/chantools/root.go b/cmd/chantools/root.go
index 13a04f7..c8aaf6f 100644
--- a/cmd/chantools/root.go
+++ b/cmd/chantools/root.go
@@ -26,7 +26,9 @@ import (
 )
 
 const (
-	defaultAPIURL = "https://blockstream.info/api"
+	defaultAPIURL        = "https://blockstream.info/api"
+	defaultTestnetAPIURL = "https://blockstream.info/testnet/api"
+	defaultRegtestAPIURL = "http://localhost:3004"
 
 	// version is the current version of the tool. It is set during build.
 	// NOTE: When changing this, please also update the version in the
@@ -56,7 +58,8 @@ var rootCmd = &cobra.Command{
 	Short: "Chantools helps recover funds from lightning channels",
 	Long: `This tool provides helper functions that can be used rescue
 funds locked in lnd channels in case lnd itself cannot run properly anymore.
-Complete documentation is available at https://github.com/lightninglabs/chantools/.`,
+Complete documentation is available at
+https://github.com/lightninglabs/chantools/.`,
 	Version: fmt.Sprintf("v%s, commit %s", version, Commit),
 	PersistentPreRun: func(cmd *cobra.Command, args []string) {
 		switch {
@@ -326,3 +329,22 @@ func setSubLogger(subsystem string, logger btclog.Logger,
 func noConsole() ([]byte, error) {
 	return nil, fmt.Errorf("wallet db requires console access")
 }
+
+func newExplorerAPI(apiURL string) *btc.ExplorerAPI {
+	// Override for testnet if default is used.
+	if apiURL == defaultAPIURL &&
+		chainParams.Name == chaincfg.TestNet3Params.Name {
+
+		return &btc.ExplorerAPI{BaseURL: defaultTestnetAPIURL}
+	}
+
+	// Also override for regtest if default is used.
+	if apiURL == defaultAPIURL &&
+		chainParams.Name == chaincfg.RegressionNetParams.Name {
+
+		return &btc.ExplorerAPI{BaseURL: defaultRegtestAPIURL}
+	}
+
+	// Otherwise use the provided URL.
+	return &btc.ExplorerAPI{BaseURL: apiURL}
+}
diff --git a/cmd/chantools/summary.go b/cmd/chantools/summary.go
index c1b9e3d..2544975 100644
--- a/cmd/chantools/summary.go
+++ b/cmd/chantools/summary.go
@@ -53,7 +53,8 @@ func (c *summaryCommand) Execute(_ *cobra.Command, _ []string) error {
 func summarizeChannels(apiURL string,
 	channels []*dataformat.SummaryEntry) error {
 
-	summaryFile, err := btc.SummarizeChannels(apiURL, channels, log)
+	api := newExplorerAPI(apiURL)
+	summaryFile, err := btc.SummarizeChannels(api, channels, log)
 	if err != nil {
 		return fmt.Errorf("error running summary: %w", err)
 	}
diff --git a/cmd/chantools/sweepremoteclosed.go b/cmd/chantools/sweepremoteclosed.go
index 5ec63f4..6ed9227 100644
--- a/cmd/chantools/sweepremoteclosed.go
+++ b/cmd/chantools/sweepremoteclosed.go
@@ -129,7 +129,7 @@ func sweepRemoteClosed(extendedKey *hdkeychain.ExtendedKey, apiURL,
 
 	var (
 		targets []*targetAddr
-		api     = &btc.ExplorerAPI{BaseURL: apiURL}
+		api     = newExplorerAPI(apiURL)
 	)
 	for index := uint32(0); index < recoveryWindow; index++ {
 		path := fmt.Sprintf("m/1017'/%d'/%d'/0/%d",
diff --git a/cmd/chantools/sweeptimelock.go b/cmd/chantools/sweeptimelock.go
index 8a1c98d..a1ce477 100644
--- a/cmd/chantools/sweeptimelock.go
+++ b/cmd/chantools/sweeptimelock.go
@@ -10,7 +10,6 @@ import (
 	"github.com/btcsuite/btcd/chaincfg/chainhash"
 	"github.com/btcsuite/btcd/txscript"
 	"github.com/btcsuite/btcd/wire"
-	"github.com/lightninglabs/chantools/btc"
 	"github.com/lightninglabs/chantools/dataformat"
 	"github.com/lightninglabs/chantools/lnd"
 	"github.com/lightningnetwork/lnd/input"
@@ -220,7 +219,7 @@ func sweepTimeLock(extendedKey *hdkeychain.ExtendedKey, apiURL string,
 		ExtendedKey: extendedKey,
 		ChainParams: chainParams,
 	}
-	api := &btc.ExplorerAPI{BaseURL: apiURL}
+	api := newExplorerAPI(apiURL)
 
 	var (
 		sweepTx          = wire.NewMsgTx(2)
diff --git a/cmd/chantools/sweeptimelockmanual.go b/cmd/chantools/sweeptimelockmanual.go
index ab64e1d..04cde72 100644
--- a/cmd/chantools/sweeptimelockmanual.go
+++ b/cmd/chantools/sweeptimelockmanual.go
@@ -10,7 +10,6 @@ import (
 	"github.com/btcsuite/btcd/chaincfg/chainhash"
 	"github.com/btcsuite/btcd/txscript"
 	"github.com/btcsuite/btcd/wire"
-	"github.com/lightninglabs/chantools/btc"
 	"github.com/lightninglabs/chantools/lnd"
 	"github.com/lightningnetwork/lnd/input"
 	"github.com/lightningnetwork/lnd/keychain"
@@ -298,7 +297,7 @@ func sweepTimeLockManual(extendedKey *hdkeychain.ExtendedKey, apiURL string,
 		ExtendedKey: extendedKey,
 		ChainParams: chainParams,
 	}
-	api := &btc.ExplorerAPI{BaseURL: apiURL}
+	api := newExplorerAPI(apiURL)
 
 	// We now know everything we need to construct the sweep transaction,
 	// except for what outpoint to sweep. We'll ask the chain API to give
diff --git a/cmd/chantools/triggerforceclose.go b/cmd/chantools/triggerforceclose.go
index 2a33316..382a61e 100644
--- a/cmd/chantools/triggerforceclose.go
+++ b/cmd/chantools/triggerforceclose.go
@@ -10,7 +10,6 @@ import (
 	"github.com/btcsuite/btcd/chaincfg/chainhash"
 	"github.com/btcsuite/btcd/connmgr"
 	"github.com/btcsuite/btcd/wire"
-	"github.com/lightninglabs/chantools/btc"
 	"github.com/lightninglabs/chantools/lnd"
 	"github.com/lightningnetwork/lnd/brontide"
 	"github.com/lightningnetwork/lnd/keychain"
@@ -152,7 +151,7 @@ func (c *triggerForceCloseCommand) Execute(_ *cobra.Command, _ []string) error {
 	log.Infof("Message sent, waiting for force close transaction to " +
 		"appear in mempool")
 
-	api := &btc.ExplorerAPI{BaseURL: c.APIURL}
+	api := newExplorerAPI(c.APIURL)
 	channelAddress, err := api.Address(c.ChannelPoint)
 	if err != nil {
 		return fmt.Errorf("error getting channel address: %w", err)
diff --git a/cmd/chantools/zombierecovery_findmatches.go b/cmd/chantools/zombierecovery_findmatches.go
index 50cb849..0b33ffd 100644
--- a/cmd/chantools/zombierecovery_findmatches.go
+++ b/cmd/chantools/zombierecovery_findmatches.go
@@ -14,7 +14,6 @@ import (
 
 	"github.com/btcsuite/btcd/btcec/v2"
 	"github.com/hasura/go-graphql-client"
-	"github.com/lightninglabs/chantools/btc"
 	"github.com/spf13/cobra"
 	"golang.org/x/oauth2"
 )
@@ -188,7 +187,7 @@ func (c *zombieRecoveryFindMatchesCommand) Execute(_ *cobra.Command,
 		log.Infof("%s: %s", groups[1], groups[2])
 	}
 
-	api := &btc.ExplorerAPI{BaseURL: c.APIURL}
+	api := newExplorerAPI(c.APIURL)
 	src := oauth2.StaticTokenSource(&oauth2.Token{AccessToken: c.AmbossKey})
 	httpClient := oauth2.NewClient(context.Background(), src)
 	client := graphql.NewClient(