diff --git a/trezorctl b/trezorctl
index d59a6c91f..7c9091a45 100755
--- a/trezorctl
+++ b/trezorctl
@@ -30,9 +30,9 @@ import sys
 
 from trezorlib.client import TrezorClient, TrezorClientVerbose, CallException, format_protobuf
 from trezorlib.transport import get_transport, enumerate_devices, TransportException
+from trezorlib import coins
 from trezorlib import messages as proto
 from trezorlib import protobuf
-from trezorlib.coins import coins_txapi
 from trezorlib.ckd_public import PRIME_DERIVATION_FLAG
 
 
@@ -470,11 +470,11 @@ def get_public_node(connect, coin, address, curve, show_display):
 @click.pass_obj
 def sign_tx(connect, coin):
     client = connect()
-    if coin in coins_txapi:
-        txapi = coins_txapi[coin]
+    if coin in coins.tx_api:
+        txapi = coins.tx_api[coin]
     else:
         click.echo('Coin "%s" is not recognized.' % coin, err=True)
-        click.echo('Supported coin types: %s' % ', '.join(coins_txapi.keys()), err=True)
+        click.echo('Supported coin types: %s' % ', '.join(coins.tx_api.keys()), err=True)
         sys.exit(1)
 
     client.set_tx_api(txapi)
diff --git a/trezorlib/client.py b/trezorlib/client.py
index ffded2439..ae9ae0c84 100644
--- a/trezorlib/client.py
+++ b/trezorlib/client.py
@@ -34,7 +34,7 @@ from . import messages as proto
 from . import tools
 from . import mapping
 from . import nem
-from .coins import coins_slip44
+from .coins import slip44
 from .debuglink import DebugLink
 from .protobuf import MessageType
 
@@ -530,8 +530,8 @@ class ProtocolMixin(object):
             n = n[1:]
 
         # coin_name/a/b/c => 44'/SLIP44_constant'/a/b/c
-        if n[0] in coins_slip44:
-            n = ["44'", "%d'" % coins_slip44[n[0]]] + n[1:]
+        if n[0] in slip44:
+            n = ["44'", "%d'" % slip44[n[0]]] + n[1:]
 
         path = []
         for x in n:
diff --git a/trezorlib/coins.py b/trezorlib/coins.py
index 4298e0c61..8a2dbe1f6 100644
--- a/trezorlib/coins.py
+++ b/trezorlib/coins.py
@@ -1,31 +1,41 @@
-from .tx_api import TxApiBitcoin, TxApiTestnet, TxApiLitecoin, TxApiZcash, TxApiDash, TxApiBcash, TxApiDecredTestnet, TxApiDogecoin, TxApiMonacoin, TxApiBitcoinGold
+import os.path
+import json
 
-coins_slip44 = {
-    'Bitcoin': 0,
-    'Testnet': 1,
-    'Decred Testnet': 1,
-    'Litecoin': 2,
-    'Dogecoin': 3,
-    'Dash': 5,
-    'Namecoin': 7,
-    'Monacoin': 22,
-    'Decred': 42,
-    'Ether': 60,
-    'EtherClassic': 61,
-    'Zcash': 133,
-    'Bcash': 145,
-    'Bitcoin Gold': 156,
-}
+from .tx_api import TxApiInsight, TxApiBlockCypher
 
-coins_txapi = {
-    'Bitcoin': TxApiBitcoin,
-    'Testnet': TxApiTestnet,
-    'Litecoin': TxApiLitecoin,
-    'Dash': TxApiDash,
-    'Zcash': TxApiZcash,
-    'Bcash': TxApiBcash,
-    'Decred Testnet': TxApiDecredTestnet,
-    'Dogecoin': TxApiDogecoin,
-    'Monacoin': TxApiMonacoin,
-    'Bitcoin Gold': TxApiBitcoinGold,
-}
+COINS_JSON = os.path.join(os.path.dirname(__file__), 'coins.json')
+
+
+def _load_coins_json():
+    # Load coins.json to local variables
+    # NOTE: coins.json comes from 'vendor/trezor-common/coins.json',
+    # which is a git submodule. If you're trying to run trezorlib directly
+    # from the checkout (or tarball), initialize the submodule with:
+    # $ git submodule update --init
+    # and install coins.json with:
+    # $ python setup.py prebuild
+    with open(COINS_JSON) as coins_json:
+        coins_list = json.load(coins_json)
+        return {coin['coin_name']: coin for coin in coins_list}
+
+
+def _insight_for_coin(coin):
+    if not coin['bitcore']:
+        return None
+    zcash = coin['coin_name'].lower().startswith('zcash')
+    network = 'insight_{}'.format(coin['coin_name'].lower().replace(' ', '_'))
+    url = coin['bitcore'][0] + 'api/'
+    return TxApiInsight(network=network, url=url, zcash=zcash)
+
+
+# exported variables
+__all__ = ['by_name', 'slip44', 'tx_api']
+
+by_name = _load_coins_json()
+slip44 = {name: coin['bip44'] for name, coin in by_name.items()}
+tx_api = {name: _insight_for_coin(coin)
+          for name, coin in by_name.items()
+          if coin["bitcore"]}
+
+# fixup for Dogecoin
+tx_api['Dogecoin'] = TxApiBlockCypher(network='blockcypher_dogecoin', url='https://api.blockcypher.com/v1/doge/main/')
diff --git a/trezorlib/tests/device_tests/common.py b/trezorlib/tests/device_tests/common.py
index 0fffb7ae9..8681d947f 100644
--- a/trezorlib/tests/device_tests/common.py
+++ b/trezorlib/tests/device_tests/common.py
@@ -22,9 +22,10 @@ from binascii import hexlify, unhexlify
 import pytest
 import os
 
+from trezorlib import coins
+from trezorlib import tx_api
 from trezorlib.client import TrezorClient, TrezorClientDebugLink
 from trezorlib.transport import get_transport
-from trezorlib import tx_api
 
 tests_dir = os.path.dirname(os.path.abspath(__file__))
 tx_api.cache_dir = os.path.join(tests_dir, '../txcache')
@@ -42,7 +43,7 @@ class TrezorTest:
         debuglink = wirelink.find_debug()
         self.client = TrezorClientDebugLink(wirelink)
         self.client.set_debuglink(debuglink)
-        self.client.set_tx_api(tx_api.TxApiBitcoin)
+        self.client.set_tx_api(coins.tx_api['Bitcoin'])
         # self.client.set_buttonwait(3)
 
         #                     1      2     3    4      5      6      7     8      9    10    11    12
diff --git a/trezorlib/tests/device_tests/test_msg_signtx.py b/trezorlib/tests/device_tests/test_msg_signtx.py
index 1237bb3d5..7b92325aa 100644
--- a/trezorlib/tests/device_tests/test_msg_signtx.py
+++ b/trezorlib/tests/device_tests/test_msg_signtx.py
@@ -18,9 +18,11 @@
 
 from .common import *
 
+from trezorlib import coins
 from trezorlib import messages as proto
 from trezorlib.client import CallException
-from trezorlib.tx_api import TxApiTestnet
+
+TxApiTestnet = coins.tx_api['Testnet']
 
 
 TXHASH_157041 = unhexlify('1570416eb4302cf52979afd5e6909e37d8fdd874301f7cc87e547e509cb1caa6')
diff --git a/trezorlib/tests/device_tests/test_msg_signtx_bcash.py b/trezorlib/tests/device_tests/test_msg_signtx_bcash.py
index 1e29ecf47..f397d5b6a 100644
--- a/trezorlib/tests/device_tests/test_msg_signtx_bcash.py
+++ b/trezorlib/tests/device_tests/test_msg_signtx_bcash.py
@@ -16,11 +16,13 @@
 # along with this library.  If not, see <http://www.gnu.org/licenses/>.
 
 from .common import *
+from trezorlib import coins
 from trezorlib import messages as proto
-from trezorlib.tx_api import TxApiBcash
 from trezorlib.ckd_public import deserialize
 from trezorlib.client import CallException
 
+TxApiBcash = coins.tx_api['Bcash']
+
 
 @pytest.mark.skip_t2
 class TestMsgSigntxBch(TrezorTest):
diff --git a/trezorlib/tests/device_tests/test_msg_signtx_bitcoin_gold.py b/trezorlib/tests/device_tests/test_msg_signtx_bitcoin_gold.py
index 6f033b8cc..99b5082c0 100644
--- a/trezorlib/tests/device_tests/test_msg_signtx_bitcoin_gold.py
+++ b/trezorlib/tests/device_tests/test_msg_signtx_bitcoin_gold.py
@@ -17,11 +17,13 @@
 # along with this library.  If not, see <http://www.gnu.org/licenses/>.
 
 from .common import *
+from trezorlib import coins
 from trezorlib import messages as proto
-from trezorlib.tx_api import TxApiBitcoinGold
 from trezorlib.ckd_public import deserialize
 from trezorlib.client import CallException
 
+TxApiBitcoinGold = coins.tx_api["Bitcoin Gold"]
+
 
 # All data taken from T1
 class TestMsgSigntxBitcoinGold(TrezorTest):
diff --git a/trezorlib/tests/device_tests/test_msg_signtx_decred.py b/trezorlib/tests/device_tests/test_msg_signtx_decred.py
index 80a183e8b..77b0040a5 100644
--- a/trezorlib/tests/device_tests/test_msg_signtx_decred.py
+++ b/trezorlib/tests/device_tests/test_msg_signtx_decred.py
@@ -17,8 +17,10 @@
 
 from .common import *
 
+from trezorlib import coins
 from trezorlib import messages as proto
-from trezorlib.tx_api import TxApiDecredTestnet
+
+TxApiDecredTestnet = coins.tx_api['Decred Testnet']
 
 
 TXHASH_e16248 = unhexlify("e16248f0b39a0a0c0e53d6f2f84c2a944f0d50e017a82701e8e02e46e979d5ed")
diff --git a/trezorlib/tests/device_tests/test_msg_signtx_segwit.py b/trezorlib/tests/device_tests/test_msg_signtx_segwit.py
index 5d35a07cd..65136c3a3 100644
--- a/trezorlib/tests/device_tests/test_msg_signtx_segwit.py
+++ b/trezorlib/tests/device_tests/test_msg_signtx_segwit.py
@@ -17,11 +17,13 @@
 
 from .common import *
 
+from trezorlib import coins
 from trezorlib import messages as proto
-from trezorlib.tx_api import TxApiTestnet
 from trezorlib.ckd_public import deserialize
 from trezorlib.client import CallException
 
+TxApiTestnet = coins.tx_api["Testnet"]
+
 
 class TestMsgSigntxSegwit(TrezorTest):
 
diff --git a/trezorlib/tests/device_tests/test_msg_signtx_segwit_native.py b/trezorlib/tests/device_tests/test_msg_signtx_segwit_native.py
index 4c4300aa9..f82f93ff8 100644
--- a/trezorlib/tests/device_tests/test_msg_signtx_segwit_native.py
+++ b/trezorlib/tests/device_tests/test_msg_signtx_segwit_native.py
@@ -17,10 +17,12 @@
 
 from .common import *
 
+from trezorlib import coins
 from trezorlib import messages as proto
-from trezorlib.tx_api import TxApiTestnet
 from trezorlib.ckd_public import deserialize
 
+TxApiTestnet = coins.tx_api['Testnet']
+
 
 class TestMsgSigntxSegwitNative(TrezorTest):
 
diff --git a/trezorlib/tests/device_tests/test_msg_signtx_zcash.py b/trezorlib/tests/device_tests/test_msg_signtx_zcash.py
index e45a01a97..e4dac926e 100644
--- a/trezorlib/tests/device_tests/test_msg_signtx_zcash.py
+++ b/trezorlib/tests/device_tests/test_msg_signtx_zcash.py
@@ -18,8 +18,11 @@
 
 
 from .common import *
+
+from trezorlib import coins
 from trezorlib import messages as proto
-from trezorlib.tx_api import TxApiZcash
+
+TxApiZcash = coins.tx_api["Zcash"]
 
 
 TXHASH_93373e = unhexlify('93373e63cc626c4a7d049ad775d6511bb5eba985f142db660c9b9f955c722f5c')
diff --git a/trezorlib/tests/device_tests/test_multisig_change.py b/trezorlib/tests/device_tests/test_multisig_change.py
index ed9607622..2d2d1c4dd 100644
--- a/trezorlib/tests/device_tests/test_multisig_change.py
+++ b/trezorlib/tests/device_tests/test_multisig_change.py
@@ -19,14 +19,14 @@
 from .common import *
 from trezorlib import messages as proto
 import trezorlib.ckd_public as bip32
-from trezorlib import tx_api
+from trezorlib.coins import tx_api
 
 
 class TestMultisigChange(TrezorTest):
 
     def setup_method(self, method):
         super(TestMultisigChange, self).setup_method(method)
-        self.client.set_tx_api(tx_api.TxApiTestnet)
+        self.client.set_tx_api(tx_api['Testnet'])
 
     node_ext1 = bip32.deserialize('tpubDADHV9u9Y6gkggintTdMjJE3be58zKNLhpxBQyuEM6Pwx3sN9JVLmMCMN4DNVwL9AKec27z5TaWcWuHzMXiGAtcra5DjwWbvppGX4gaEGVN')
     # m/1 => 02c0d0c5fee952620757c6128dbf327c996cd72ed3358d15d6518a1186099bc15e
diff --git a/trezorlib/tests/unit_tests/test_tx_api.py b/trezorlib/tests/unit_tests/test_tx_api.py
index 888874dd0..6111b15d8 100644
--- a/trezorlib/tests/unit_tests/test_tx_api.py
+++ b/trezorlib/tests/unit_tests/test_tx_api.py
@@ -18,8 +18,11 @@
 
 import os
 
+from trezorlib import coins
 from trezorlib import tx_api
-from trezorlib.tx_api import TxApiBitcoin, TxApiTestnet
+
+TxApiBitcoin = coins.tx_api['Bitcoin']
+TxApiTestnet = coins.tx_api['Testnet']
 
 tests_dir = os.path.dirname(os.path.abspath(__file__))
 
diff --git a/trezorlib/tx_api.py b/trezorlib/tx_api.py
index cefe505a7..e7e8a02d0 100644
--- a/trezorlib/tx_api.py
+++ b/trezorlib/tx_api.py
@@ -148,15 +148,3 @@ class TxApiBlockCypher(TxApi):
             o.script_pubkey = binascii.unhexlify(vout['script'])
 
         return t
-
-
-TxApiBitcoin = TxApiInsight(network='insight_bitcoin', url='https://btc-bitcore1.trezor.io/api/')
-TxApiTestnet = TxApiInsight(network='insight_testnet', url='https://testnet-bitcore3.trezor.io/api/')
-TxApiLitecoin = TxApiInsight(network='insight_litecoin', url='https://ltc-bitcore1.trezor.io/api/')
-TxApiDash = TxApiInsight(network='insight_dash', url='https://dash-bitcore1.trezor.io/api/')
-TxApiZcash = TxApiInsight(network='insight_zcash', url='https://zec-bitcore1.trezor.io/api/', zcash=True)
-TxApiBcash = TxApiInsight(network='insight_bcash', url='https://bch-bitcore2.trezor.io/api/')
-TxApiBitcoinGold = TxApiInsight(network='insight_bitcoin_gold', url='https://btg-bitcore2.trezor.io/api/')
-TxApiDecredTestnet = TxApiInsight(network='insight_decred_testnet', url='https://testnet.decred.org/api/')
-TxApiDogecoin = TxApiBlockCypher(network='blockcypher_dogecoin', url='https://api.blockcypher.com/v1/doge/main/')
-TxApiMonacoin = TxApiInsight(network='insight_monacoin', url='https://mona.insight.monaco-ex.org/insight-api-monacoin/')