Akutan

Protocols gRPC, HTTP/REST

Akutan's API server source (http.go) registers a real client-facing HTTP surface (POST /q for queries, plus /stats, /factStats, /profile, /metrics, /viewreg) on port 9988 alongside the FactStore gRPC service on port 9987; this is a documented, general-purpose dual API, not admin-only, so HTTP/REST belongs alongside gRPC (pass B). Pass A's gRPC-only answer misses the query-capable HTTP path. Project is archived/unmaintained.

• listens on localhost for gRPC requests on port 9987 and for HTTP requests on

  akutan/README.md at master · eBay/akutan · reviewed 2026-08-02

• New returns a new instance of the API server, this exposes both an HTTP & gRPC API for consumers of the Akutan system to use.

  http.go · eBay/akutan · reviewed 2026-08-02

License Apache-2.0

SPDX identifier as classified by GitHub from the repository licence file.

• "spdx_id": "Apache-2.0"

  GitHub licence API — eBay/akutan · reviewed 2026-08-02

Released 2019-04

Confirms current value. eBay's engineering blog announced the public open-source release of Beam (later renamed Akutan in July 2019) in early April 2019, consistent with the GitHub repo's creation date of 2019-04-04.

• We're excited to announce the public release of Beam, a distributed knowledge graph store, under the Apache 2.0 open source license.

  Beam: A Distributed Knowledge Graph Store · reviewed 2026-08-02

Language Go

Confirms current value. Stated directly in the project README and corroborated by GitHub's byte-count stats, where Go (1.9M bytes) is effectively the only substantive language in the repo.

• It's written in [Go](https://golang.org/). You'll need v1.11.5 or newer.

  README.md · reviewed 2026-08-02