> ## Documentation Index > Fetch the complete documentation index at: https://cantonfoundation-i25643-docs-explanations-security.mintlify.site/llms.txt > Use this file to discover all available pages before exploring further. # Ledger API protobuf > Descriptor-backed protobuf API history grouped by package.

Protobuf Reference

Ledger API protobuf

Operation-first gRPC pages with package-level browsing and recursive related schema sections.

gRPC Added 3.5.15
Source Canton protobuf trees from published release bundles
Version filter stable Canton release bundles >= 3.2.0
Latest release v3.5.19
Packages 6
Endpoints 61
Messages 242
## Release Summary Each release lists the endpoints it added, changed, or removed, with message and enum counts. Endpoint names link to their reference pages and release versions link to the History section. Releases with no API changes: `3.4.7`, `3.4.8`, `3.4.9`, `3.5.2`, `3.5.3`, `3.5.4`, `3.5.5`, `3.5.6`, `3.5.8`, `3.5.9`, `3.5.10`, `3.5.11`, `3.5.12`, `3.5.13`, `3.5.14`, `3.5.16`, `3.5.17`, `3.5.18`, `3.5.19`.
3.5.15
2 added

Endpoints: 2 added. Messages: 4 added.

Added TrafficService/GetAccount
Added TrafficService/UpdateAccount
3.5.7
1 added

Endpoint: 1 added. Message: 1 added.

Added CommandCompletionService/GetCompletions
3.5.1
2 added

Endpoints: 2 added. Messages: 8 added, 32 changed. Enum: 1 changed.

Added StateService/GetActiveContractsPage
Added UpdateService/GetUpdatesPage
3.4.11
1 added

Endpoint: 1 added. Messages: 2 added.

Added ContractService/GetContract
3.4.10

Message: 1 changed.

3.4.6

Message: 1 changed.

3.4.0
Baseline

First release covered by this reference: 55 endpoints, 227 messages, 12 enums.

## Ledger API
com.daml.ledger.api.v2
gRPC Added 3.5.7

9 services, 23 endpoints, 121 messages, 8 enums

Services 9
Endpoints 23
Messages 121
Enums 8
com.daml.ledger.api.v2.admin
gRPC

6 services, 28 endpoints, 79 messages, 3 enums

Services 6
Endpoints 28
Messages 79
Enums 3
com.daml.ledger.api.v2.interactive
gRPC

1 services, 6 endpoints, 29 messages, 1 enums

Services 1
Endpoints 6
Messages 29
Enums 1
com.daml.ledger.api.v2.testing
gRPC

1 services, 2 endpoints, 3 messages

Services 1
Endpoints 2
Messages 3
Enums 0
## Other APIs
com.digitalasset.canton.tea.v1
gRPC Added 3.5.15

1 services, 2 endpoints, 4 messages

Services 1
Endpoints 2
Messages 4
Enums 0
## Schema Packages
com.daml.ledger.api.v2.interactive.transaction.v1
gRPC

0 services, 0 endpoints, 6 messages

Services 0
Endpoints 0
Messages 6
Enums 0
## History
Added 3.5.15

com.digitalasset.canton.tea.v1.TrafficService/GetAccount

com.digitalasset.canton.tea.v1.TrafficService/UpdateAccount

Added 3.5.7

com.daml.ledger.api.v2.CommandCompletionService/GetCompletions

Added 3.5.1

com.daml.ledger.api.v2.StateService/GetActiveContractsPage

com.daml.ledger.api.v2.UpdateService/GetUpdatesPage

Added 3.4.11

com.daml.ledger.api.v2.ContractService/GetContract