# Athens: a self-hosted proxy standing between your go command and the world > Athens is a MIT-licensed, enterprise oriented implementation of the Go Module proxy for the Go Modules download API, letting organizations cache and serve module dependencies from their own infrastructure. Storage is pluggable across cloud blob stores, MongoDB, CDN endpoints, shared disks and memory, and the repository ships a full development stack with Jaeger tracing and Helm charts for deployment. **gomods/athens** — A Go module datastore and proxy - Repository: https://github.com/gomods/athens - Website: https://docs.gomods.io - Stars: 4,803 · Forks: 546 - Language: Go - License: MIT - Published: 2026-09-23 · Updated: 2026-09-23 · Language: en - Canonical page: https://hysenlabs.com/projects/gomods-athens ## A private implementation of the Go download protocol Athens is an open source, enterprise ready implementation of the Go Module proxy for the Go Modules download API, which means it implements the same protocol the go command speaks when fetching dependencies, so clients need only point GOPROXY or GOProxy environment settings at an Athens server and nothing else changes. The proxy implements the modules download protocol, caches what it fetches, and thereafter serves modules from its own storage rather than repeatedly hitting upstream sources. The documentation site at docs.gomods.io carries the protocol reference and installation guides. Development teams at several companies are described as using Athens in their everyday development workflows, running their own servers, hooking them to their own storage backends, and configuring their local Go environments to use them, with a standing issue where adopters add a comment to be counted. ## Storage from blob stores to etcd The headline configurability is the storage layer, documented as supporting cloud blob storage services, MongoDB, content distribution networks, shared disk and in-memory backends. The dependency list in go.mod names the concrete implementations behind those categories, Google Cloud Storage, Azure Blob Storage through the Azure SDK, Amazon S3 including its transfer manager, and MinIO for S3-compatible self hosting, plus the MongoDB driver, both the MySQL and PostgreSQL drivers, go-redis with redislock for distributed locking, and etcd clients. An organization already running any mainstream database or object store can point Athens at it rather than introducing new infrastructure, which is the quiet argument behind the wide support matrix. ## Mongo, Jaeger, Minio and Azurite in one compose file The development environment is a docker-compose file that stands up the whole ecosystem. The dev service builds the proxy on Go 1.26.2, publishes port 3000, configures MongoDB as storage with ATHENS_STORAGE_TYPE=mongo, and exports traces over OTLP to a Jaeger all-in-one container exposing both gRPC and HTTP collector ports. Test services run unit and end to end suites from a dedicated Dockerfile, the unit service depending on both Mongo and MinIO. Local emulators cover the cloud backends, Azurite stands in for Azure blob storage and MinIO for S3, so driver code can be exercised against realistic endpoints without cloud accounts. The TIMEOUT=20 setting carries a comment admitting why it exists, in case the mongo dependency takes longer to start up, a small honest detail of life with containers. ## Looking for core maintainers, in public The README's most human paragraph is a recruitment notice, the project is looking for people who would like to become core maintainers, with issue 1734 linked for details. That transparency extends to the adoption roll call, issue 1323 collects comments from teams using Athens, an informal census in place of marketing claims. The contribution path is deliberately welcoming, a well maintained list of good first issues, a convention of commenting I want to work on this to claim one, a guide for contributors new to the GitHub process entirely, and even a recommended video on contributing code. A DEVELOPMENT.md covers environment setup, and the project explicitly invites work beyond code, technical documentation and release management are named as needed contributions. ## A philosophy file you are allowed to skim Before contributing, the project asks readers to look at PHILOSOPHY.md, and the request is calibrated rather than demanding, it is not too long and it is ok for you to skim it, or even just read the first two sections, so long as the spirit of who the team is comes across. Community happens in the #athens channel of the Gophers Slack, described as a really friendly group with a named person to ping for the lowdown. For learning the technology without contributing, the README curates a reading list, a gentle introduction to why the project started, an article on the download protocol the proxy implements, the proxy design documentation, the Go modules wiki, and the long form Go and Versioning essays, a syllabus for understanding what the proxy is for. ## Helm charts, and CI from three eras Deployment artifacts and CI history both sit in the repository root. The charts directory contains the Helm chart for running Athens on Kubernetes, the production counterpart to the compose development stack. The CI configuration spans CircleCI, AppVeyor and Azure Pipelines alongside GitHub Actions, artifacts of a project old enough to have collected workflows across platforms and hosting generations. A netlify.toml and a Hugo-based docs build in the Makefile handle the documentation site, an init.ps1 bootstraps Windows environments, and a config.dev.toml plus download.example.hcl show the configuration surface in both TOML and HCL flavors. The Makefile rounds out with build-ver stamping version and build date through ldflags, and lint targets pinning golangci-lint at v2.11.4. ## Tracing and metrics wired through the binary Observability is built in rather than bolted on. The go.mod pulls the Prometheus client libraries for metrics and OpenTelemetry instrumentation for HTTP tracing, including the B3 propagator for header compatibility with existing Zipkin style deployments, and the development stack ships Jaeger to receive the traces, which is how a caching proxy debugs its own hit and miss behavior across a fleet. Releases are steady, v0.17.1 on 2026-05-12, v0.18.0 on 2026-06-14 and v0.18.1 on 2026-07-15, with the repository last pushed 2026-09-20, on Go 1.26.2. The repository also keeps a SHOULDERS.md crediting the projects Athens builds on, a REVIEWS.md for code review practice, and coding guidelines referencing the talk Code like the Go team, fitting a project whose product is being a good citizen of the Go ecosystem. ## Conclusion Deploy Athens when dependency fetches should go through infrastructure you control, for build reproducibility behind a corporate firewall, for caching to survive upstream outages, or for policy control over module sources, since it speaks the protocol the go command already understands. Skip it for a single laptop where GOPROXY defaults suffice, it earns its keep at team scale and above. Before deploying, choose the storage backend matching what you already operate from the documented list, verify the Helm chart values in charts fit your cluster, and note the project is actively seeking core maintainers through its own issue tracker, relevant reading for anyone standardizing on it long term. ## FAQ ### What is Athens in Go development? Athens is an open source, MIT-licensed implementation of the Go Module proxy for the Go Modules download API. It caches and serves module dependencies from your own server and storage, so go commands fetch through your infrastructure instead of directly from upstream sources. ### Which storage backends does Athens support? Documented storage drivers include cloud blob storage services, MongoDB, content distribution networks, shared disk and in-memory. The dependency list shows concrete support for Google Cloud Storage, Azure Blob Storage, Amazon S3, MinIO, MongoDB, MySQL, PostgreSQL, Redis and etcd. ### How do you run Athens locally? Use the Makefile's run target, which starts the proxy from cmd/proxy with config.dev.toml, or make run-docker, which builds and starts the compose dev service on port 3000 with MongoDB storage and OTLP traces flowing to Jaeger. The compose file also stands up MinIO and Azurite emulators for backend testing. ## Sources - [gomods/athens on GitHub](https://github.com/gomods/athens) - [License: MIT](https://github.com/gomods/athens/blob/main/LICENSE) - [Project website](https://docs.gomods.io) - [README](https://github.com/gomods/athens/blob/main/README.md) - [Releases](https://github.com/gomods/athens/releases) --- Hysen Labs editorial analysis, written from the project's own repository and release notes. Cite the canonical page: https://hysenlabs.com/projects/gomods-athens