# Sift gRPC API

**Canonical:** https://apis.io/apis/sift-stack/sift-grpc-api/  
**Provider:** Sift Stack — https://apis.io/providers/sift-stack/  
**Base URL:** https://api.siftstack.com  
**Documentation:** https://docs.siftstack.com/api/reference/protocol-buffers

Sift gRPC API is one of 47 APIs that [Sift Stack](https://apis.io/providers/sift-stack/) publishes on the [APIs.io](https://apis.io/) network. Tagged areas include gRPC, Protobuf, Streaming, and Telemetry. The published artifact set on APIs.io includes API documentation.

The gRPC contract that is Sift's primary API — 51 services and 330 RPCs defined across 66 proto3 files published under MIT in the sift-stack/sift monorepo, including the bidirectional streaming ingest path (sift.ingest.v1) that the REST transcoding cannot express. Every first-party client library is generated from these definitions.

## Machine-readable artifacts (4)

- **Protobuf** — https://raw.githubusercontent.com/api-evangelist/sift-stack/refs/heads/main/grpc/sift-stack-grpc-index.yml
- **SourceCode** — https://github.com/sift-stack/sift/tree/main/protos
- **Documentation** — https://docs.siftstack.com/api/clients
- **APIsJSON** — https://raw.githubusercontent.com/api-evangelist/sift-stack/refs/heads/main/apis.yml

## Other Sift Stack APIs (12)

- [Sift MCP Server](https://apis.io/apis/sift-stack/sift-mcp-server/)
- [Sift Stack Annotation Log Service API](https://apis.io/apis/sift-stack/sift-stack-annotationlogservice-api/)
- [Sift Stack Annotation Service API](https://apis.io/apis/sift-stack/sift-stack-annotationservice-api/)
- [Sift Stack API Key Service API](https://apis.io/apis/sift-stack/sift-stack-apikeyservice-api/)
- [Sift Stack Asset Service API](https://apis.io/apis/sift-stack/sift-stack-assetservice-api/)
- [Sift Stack Automation Service API](https://apis.io/apis/sift-stack/sift-stack-automationservice-api/)
- [Sift Stack Calculated Channel Service API](https://apis.io/apis/sift-stack/sift-stack-calculatedchannelservice-api/)
- [Sift Stack Calculated Channels Service API](https://apis.io/apis/sift-stack/sift-stack-calculatedchannelsservice-api/)
- [Sift Stack Campaign Service API](https://apis.io/apis/sift-stack/sift-stack-campaignservice-api/)
- [Sift Stack Channel Schema Service API](https://apis.io/apis/sift-stack/sift-stack-channelschemaservice-api/)
- [Sift Stack Channel Service API](https://apis.io/apis/sift-stack/sift-stack-channelservice-api/)
- [Sift Stack Comment Service API](https://apis.io/apis/sift-stack/sift-stack-commentservice-api/)

## Tags

gRPC, Protobuf, Streaming, Telemetry

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/sift-stack/sift-grpc-api/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/sift-stack/.