Open-Transactions comes with a high-level command-line client, called opentxs
This is actually just an OT Script, written using the OT high-level API
(FYI, You might want to make sure the otserver is running in another terminal, before playing with the client.)
Here is the output from running "opentxs help" using the high-level CLI:
> opentxs help Welcome to Open Transactions -- version 0.89.c Using as server: tBy5mL14qSQXCJK7Uz3WlTOKRP9M0JZksA3Eg7EnnQ1 Using as mynym: T1Q3wZWgeTUoaUvn9m1lzIK5tn5wITlzxzrGNI8qtaV Using as myacct: eMldMMiKfJRO8B8yJjzcezs9xvSt7dkdlWt50e8CDxn Using as mypurse: CvHGtfOOKzQKL5hFL7J4iF5yAodVKhS1rxPzME5R9XA Commands: Advanced utilities: addsignature add a signature to a contract without releasing others. decode OT-base64-decode out of armor. decrypt decrypt ciphertext using nym's private key. encode OT-base64-encode into armor. encrypt encrypt plaintext to a nym's public key. exchange exchange in/out of a basket currency. getboxreceipt downloads a box receipt based on transaction ID. getcontract download an asset or server contract by its ID. issueasset issue a currency contract onto an OT server. newasset create a new asset contract. newbasket create a new basket currency. newkey create a new symmetric key. newserver create a new server contract. pass_decrypt password-decrypt a ciphertext using a symmetric key. pass_encrypt password-encrypt a plaintext using a symmetric key. register register a nym onto an OT server. showbaskets show basket currencies issued on a particular server. showmint show a mint file for specific asset ID. Download if necessary. sign sign a contract, releasing all other signatures first. verifysig verify a signature on a contract. The user wallet: addasset paste an existing asset contract, import it into your wallet. addserver paste an existing server contract, import it into your wallet. changepw change the master passphrase for the wallet. editacct edit an asset account's label, as it appears in your wallet. editasset edit a currency contract's label, as it appears in your wallet. editnym edit the nym's label, as it appears in your wallet. editserver edit a server contract's label, as it appears in your wallet. exportcert export the OpenSSL cert (only) for a specific Nym. exportnym export an OT Nym as a single importable file. importcert import an OpenSSL cert and create a Nym based on it. importnym import an OT Nym that was previously exported. newnym create a new nym. refresh performs both refreshnym and refreshacct. refreshacct download latest intermediary files for myacct. refreshnym download latest intermediary files for mynym. showaccounts show the asset accounts in the wallet. showassets show the currency contracts in the wallet. showincoming show incoming payments for mynym+server and/or inbox for myacct. shownym show the statistics for a specific nym. shownyms show the nyms in the wallet. showpurse show contents of cash purse. showservers show the server contracts in the wallet. stat display wallet contents. verifyreceipt verify your intermediary files against the last signed receipt. Misc: clearrecords clear all archived records and receipts. records display contents of record box. Markets (bid/ask): canceloffer cancel a still-running, recurring market offer. getmarkets download the list of markets. getmyoffers download mynym's list of market offers. getoffers download the list of market offers. newoffer create a new market offer. paydividend dividend payout, sent to all shareholders (in voucher form.) showmarkets display the list of markets. showmyoffers show mynym's offers on a particular server and market. showoffers show all offers on a particular server and market. Asset accounts: acceptall accept all incoming transfers, receipts, payments, and invoices. acceptinbox accept all incoming transfers and receipts in MyAcct's inbox. acceptinvoices pay all invoices in MyNym's payments inbox. acceptmoney accept all incoming transfers and payments into MyAcct. acceptpayments accept all incoming payments in MyNym's payments inbox. acceptreceipts accept all receipts in MyAcct's inbox. accepttransfers accept all incoming transfers in MyAcct's inbox. balance display balance for a specific account. deposit deposit cash, cheque, voucher, or tokens. inbox display inbox of a particular account. newacct create a new asset account. outbox display outbox of a particular account. showacct show account stats for a single account. transfer send a transfer from myacct to hisacct. Dealing with other users: checknym download a nym's public key based on his ID. delmail delete an in-mail item. deloutmail delete an out-mail item. mail display in-mail for a particular nym. outmail display out-mail for a particular nym. outpayment display contents of outgoing payments box. payinvoice pay an invoice. payments display contents of incoming payments box. sendcash send cash from mypurse to recipient, withdraw if necessary. sendcheque write a cheque and then send it to the recipient. sendinvoice write an invoice and then send it to the recipient. sendmsg send a message to another nym's in-mail. sendvoucher withdraw a voucher and then send it to the recipient. showpayment show the details of an incoming payment in the payments inbox. Financial instruments: buyvoucher withdraw from myacct as a voucher (cashier's cheque.) cancelplan cancel a still-running, recurring payment plan. confirm confirm your agreement to a smart contract or payment plan. discard discard/cancel a not-yet-cashed, outgoing instrument. exportcash export a cash purse. importcash import a cash purse. propose as merchant, propose a payment plan to a customer. trigger trigger a clause on a running smart contract. withdraw withdraw cash. (From acct on server into local purse.) writecheque write a cheque and print it out to the screen. writeinvoice write an invoice and print it out to the screen.