#### find cryptocurrency prices
curl rates.sx
curl rates.sx/btc
curl rates.sx/12xmr

#### APIs
https://www.blockcypher.com/dev/bitcoin/#introduction
https://sochain.com/api
https://github.com/Blockstream/esplora/blob/master/API.md
https://localmonero.co/blocks/api


#### sochain api
curl https://sochain.com/api/v2/get_address_balance/BTC/{ADDRESS}


#### blockcypher api (ethereum example)
curl https://api.blockcypher.com/v1/eth/main/addrs/{ADDRESS} | grep "\"balance"

# get up to 3 transactions from a known address 
curl https://api.blockcypher.com/v1/btc/main/addrs/{ADDRESS}?limit=3

# get one of the two transactions (a big one)
curl https://api.blockcypher.com/v1/btc/main/txs/{TRANSACTION}/

# retrieve the block it was included in by height
curl https://api.blockcypher.com/v1/btc/main/blocks/{BLOCK}


#### xchain.io and coindaddy
curl https://xchain.io/api/balances/{ADDRESS}/1/500
curl http://public.coindaddy.io:8432/a/{ADDRESS}/balance
curl https://reputation.coindaddy.io/api/asset/xcp/{ASSET}


#### blockstream.info - esplora - Tor-friendly API

curl https://blockstream.info/api/address/{address}
curl https://blockstream.info/api/tx/{transaction}/status
curl https://blockstream.info/api/address/{address}/txs
curl https://blockstream.info/api/address/{address}/utxo
curl https://blockstream.info/api/scripthash/{hash}

# find addresses that begin with the given prefix
curl https://blockstream.info/api/address-prefix/{prefix} 

# fee estimates: return confirmation estimates in number of blocks (sat/byte)
curl https://blockstream.info/api/fee-estimates


#### localmonero api
https://localmonero.co/blocks/api/
https://localmonero.co/blocks/api/{method}/{param1}/{param2}

#### grin explorer
https://minergate.com/blockchain/grin/blocks