Ogmios JSON-RPC API

GetBlock provides fast and reliable access to Cardano nodes via JSON-RPC API. Connect to the Cardano network without running your own infrastructure.

Ogmios is a lightweight bridge to a Cardano node that speaks JSON-RPC 2.0. Over HTTP, it answers stateless request-response calls: ledger and network state queries, transaction submission, and script evaluation. Stateful protocols such as chain synchronization and mempool monitoring run over the WebSocket interface instead.

Every request is an HTTP POST with a JSON-RPC 2.0 body: a method, optional params, and an id. Responses carry the same id and either a result or an error.

Base URL

https://go.getblock.io/<ACCESS-TOKEN>/

Replace <ACCESS-TOKEN> with the access token from the GetBlock dashboard.

Network Queries

Method	Description
queryNetwork/blockHeight	Current network block height
queryNetwork/tip	Network tip slot and hash
queryNetwork/startTime	Network start time
queryNetwork/genesisConfiguration	Genesis configuration for an era

Ledger State Queries

Method	Description
queryLedgerState/tip	Ledger tip slot and hash
queryLedgerState/epoch	Current epoch
queryLedgerState/eraStart	Start of the current era
queryLedgerState/eraSummaries	Era summaries for time conversion
queryLedgerState/protocolParameters	Current protocol parameters
queryLedgerState/utxo	Unspent outputs by address or reference
queryLedgerState/stakePools	Registered stake pools
queryLedgerState/liveStakeDistribution	Live stake distribution
queryLedgerState/rewardAccountSummaries	Reward-account summaries
queryLedgerState/projectedRewards	Projected rewards
queryLedgerState/rewardsProvenance	Rewards provenance data
queryLedgerState/nonces	Consensus nonces
queryLedgerState/treasuryAndReserves	Treasury and reserves balances
queryLedgerState/governanceProposals	Active governance proposals

Transaction Submission

Method	Description
submitTransaction	Submit a signed transaction
evaluateTransaction	Evaluate script execution units

Support

For technical support and questions:

• Support: [e-mail]

See Also

• Ogmios Documentation

• Ogmios WebSocket API

• Cardano (ADA)