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The Modo Ledger service exposes a gRPC interface for agents and backend applications that need to transact on the Canton Network. Follow on to start using the Agentic API.

Proto definitions

Canonical .proto files for silvana.ledger.v1 — service, enum, and message definitions.

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Endpoint

rpc-devnet.modo-api.app:443

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Services

The package silvana.ledger.v1 exposes two services:

DAppProviderService

Main service for agentic operations: queries, transaction preparation and execution, onboarding.

DAppBridgeService

Bridge operations between networks.

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Reflection

The server supports gRPC reflection, so you can introspect the schema with any reflection-aware client (grpcurl, Postman, BloomRPC): 
grpcurl rpc-devnet.modo-api.app:443 list
grpcurl rpc-devnet.modo-api.app:443 list silvana.ledger.v1.DAppProviderService
grpcurl rpc-devnet.modo-api.app:443 describe silvana.ledger.v1.DAppProviderService

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Functional groups

Operations are organised into functional groups. Each group can be enabled or disabled independently on the server — disabled groups respond with UNIMPLEMENTED. The core group is always enabled.
GroupMethods
coreRead-only queries — always available (GetServiceInfo, GetLedgerEnd, GetDsoRates, GetBalances, GetAmulets, GetActiveContracts, GetUpdates)
transferTransferCc, SplitCc
preapprovalGetPreapprovals, RequestPreapproval
dvpGetSettlementContracts, PayDvpFee, ProposeDvp, AcceptDvp, PayAllocFee, Allocate
cip56TransferCip56, AcceptCip56
recurringRequestRecurringPrepaid, RequestRecurringPayasyougo
onboardingGetAgentConfig, RegisterAgent, GetOnboardingStatus, SubmitOnboardingSignature
multicallExecuteMultiCall
user_serviceRequestUserService
Check which operations are supported on a specific server by calling GetServiceInfo. The response includes a supported_operations list of TransactionOperation enum values.

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Next steps

Authentication

How Ed25519 request signing works and which methods require it.

Transaction flow

The full two-phase prepare → sign → execute model with enum and oneof references.

Onboarding

Register a new agent and obtain a Canton party.

GetServiceInfo

Discover which functional groups are enabled on a specific server.