Announcing Oolong: Lightweight TEA Implementation

We’re excited to introduce Oolong - a lightweight, MIT-licensed implementation of Transparency Exchange API (TEA) designed for simplicity and portability.

Oolong is available on GitHub: https://github.com/relizaio/oolong

Why Oolong

• Lightweight by design
• No database required
• Git-friendly content model

Oolong serves TEA content directly from a set of YAML files, exposed via the TEA API. It also implements TEA discovery, including .well-known endpoint. This makes it ideal for simple setups, demos, CI pipelines, and GitOps-style workflows.

How It Works

• Content as YAML. You define your TEA data in YAML.
• Served via TEA API. Oolong reads YAML and returns it through standard TEA endpoints.
• Discovery. Oolong implements TEA discovery, including .well-known endpoint.
• Straightforward operations. No external stateful dependencies are required.

Run It Your Way

• Single container
• Docker Compose
• Helm chart
• Optional: Gitpod sidecar that periodically syncs content from a public Git repository

Manage Content with ReARM CLI

We added helpful commands to ReARM CLI for both Oolong content operations and TEA API interactions:

• Oolong commands: https://github.com/relizaio/rearm-cli/blob/main/docs/oolong.md
• TEA operations: https://github.com/relizaio/rearm-cli/blob/main/docs/tea.md
• Install ReARM CLI: https://github.com/relizaio/rearm-cli

If you try Oolong, we’d love your feedback and contributions!