Unconfirmed and confirmed transactions for a given address (including support for multisig and P2SH addresses)
Query confirmation level of a given transaction in the P2P network. You can also query about any historical transaction.
Notification about new block discovery and confirmation by the network. You can also query about any historical block.
Support for Counterparty and Colored coins coming soon
Easy to use and flexible API
Redundant data stores, built for concurrent access
Purpose-built API, dedicated team & SLA in commercial contracts
With demanding and sophisticated customers we work on dedicated APIs and bitcoin solutions (eg for provably fair gaming & distributed voting).