---
title: gRPC mirror
description: A gRPC mirror of Search and Reason for agent tool-use loops that prefer gRPC over HTTP/JSON.
order: 1
---

`Search` and `Reason` (including streaming) are also available over gRPC, on a separate port from the REST API — useful for agent frameworks whose tool-use loop already speaks gRPC and would otherwise pay JSON marshalling overhead twice.

- Contract: `proto/dike/v1/dike.proto` in the dike-api repo.
- Auth: `authorization: Bearer <api_key>` gRPC metadata — the same keys as REST, not a separate credential.
- Rate limits: the same `RATE_LIMIT_DEFAULT` / `RATE_LIMIT_REASON` values as REST, enforced per-method.
- Server reflection is registered and left unauthenticated, matching `GET /v1/openapi.yaml` — so `grpcurl` and similar tools can discover the service without a local copy of the `.proto` file.

```bash
grpcurl -H "authorization: Bearer $DIKE_API_KEY" \
  api.dike.it.com:9090 describe
```

Cite and Graph Traverse are REST-only for now — there's no gRPC equivalent yet.