Bazel (bazel-build)

Bazel is a fast, scalable, multi-language and extensible build tool open-sourced by Google. It supports software projects of any size across Java, C++, Go, Python, Rust, Swift, Kotlin, Scala, Android, iOS, and many other languages and platforms. Bazel uses a hermetic, sandboxed execution model with content-addressable caching, parallel builds, and remote execution. The project ships the bazel CLI, the Starlark extension language for build rules, the MODULE.bazel external-dependency system (Bzlmod), and the Bazel Central Registry — a public HTTP index registry that hosts community-maintained Bazel modules.

APIs.json: https://raw.githubusercontent.com/api-evangelist/bazel-build/refs/heads/main/apis.yml

Scope

• Type: Index
• Position: Consumer
• Access: 3rd-Party

Tags

• Build Systems
• Build Tool
• Bzlmod
• CI/CD
• Developer Tools
• Hermetic Builds
• Monorepo
• Open Source
• Remote Execution
• Starlark

Timestamps

• Created: 2026-05-25
• Modified: 2026-05-25

APIs

Bazel Central Registry API

The Bazel Central Registry (BCR) is the default index registry consulted by Bzlmod, Bazel's external dependency management system. The BCR exposes a stable HTTP layout at https://bcr.bazel.build/ that serves a registry-wide bazel_registry.json plus per-module metadata.json, MODULE.bazel manifests, and source.json fetch instructions. Since Bazel 8 Bzlmod is on by default, making the BCR the registry every Bazel install resolves against unless --registry is overridden.

• Human URL: https://registry.bazel.build/
• Base URL: https://bcr.bazel.build

Tags

• Bzlmod
• Index Registry
• Modules
• Package Registry

Properties

• Documentation
• Documentation
• Portal
• OpenAPI — OpenAPI Specification
• Postman Collection — Postman Collection 2.1
• Open Collection — Open Collection 1.0
• JSON Schema — JSON Schema
• JSON Schema — JSON Schema
• JSON Schema — JSON Schema
• GitHub Repository

Bazel Command Line Interface

The bazel command line tool is the primary user-facing surface of Bazel. It exposes commands such as build, test, run, query, cquery, aquery, mod, fetch, info, coverage, and clean, plus the BEP/BES streaming protocols for build event publishing. Bazelisk is the recommended launcher that pins the Bazel version per project via .bazelversion.

• Human URL: https://bazel.build/reference/command-line-reference

Tags

• CLI
• Commands
• Tooling

Properties

• Documentation
• Documentation
• Documentation
• Tool
• Tool
• Postman Collection — Postman Collection 2.1
• Open Collection — Open Collection 1.0

Bazel Starlark Build API

Bazel's build rules, macros, and module extensions are written in Starlark — a deterministic Python dialect. The Starlark Build API exposes the rule(), repository_rule(), module_extension(), aspect(), and provider() primitives used to declare build targets, generate actions, and integrate new languages. BUILD, BUILD.bazel, .bzl, MODULE.bazel, and WORKSPACE files are all evaluated by this API.

• Human URL: https://bazel.build/rules

Tags

• BUILD
• DSL
• Extension
• Rules
• Starlark

Properties

• Documentation
• Documentation
• Documentation
• API Reference
• Postman Collection — Postman Collection 2.1
• Open Collection — Open Collection 1.0

Bazel Remote Execution API

Bazel speaks the open Remote Execution API (REAPI), a gRPC protocol for content-addressable storage and distributed action execution. REAPI lets Bazel offload compile, test, and link actions to a remote build farm and share a Content-Addressable Store (CAS) and Action Cache across users and CI runners. Bazel implements the client side; servers such as BuildBuddy, EngFlow, Buildbarn, Buildfarm, and Google RBE implement the server side.

• Human URL: https://github.com/bazelbuild/remote-apis

Tags

• CAS
• Caching
• Distributed Builds
• gRPC
• Remote Execution

Properties

• Documentation
• Documentation
• GitHub Repository
• Protocol Buffer
• Postman Collection — Postman Collection 2.1
• Open Collection — Open Collection 1.0

Bazel Build Event Protocol

The Build Event Protocol (BEP) is Bazel's structured stream of build events — target configured, progress, test results, action executed, build finished — emitted during every invocation. BEP can be written to a local file (--build_event_json_file / --build_event_binary_file) or streamed via gRPC to a Build Event Service (BES) backend for build observability, flake analysis, and CI dashboards.

• Human URL: https://bazel.build/remote/bep

Tags

• BEP
• BES
• Build Events
• Observability
• Streaming

Properties

• Documentation
• Documentation
• Protocol Buffer
• Postman Collection — Postman Collection 2.1
• Open Collection — Open Collection 1.0

Common Properties

• Portal
• Documentation
• Getting Started
• API Reference
• Blog
• GitHub Organization
• GitHub Repository
• GitHub Repository
• GitHub Repository
• GitHub Repository
• GitHub Repository
• GitHub Repository
• GitHub Repository
• Changelog
• Issues
• Roadmap
• Governance
• Terms of Service
• Security
• Forum
• Stack Overflow
• Tool
• Tool
• Tool
• SDK
• SDK
• SDK
• SDK
• SDK
• SDK
• SDK
• SDK
• SDK
• SDK
• SDK
• SDK
• SDK
• SDK
• SDK
• Plugins
• Plugins
• Code Examples
• Vocabulary
• JSON-LD — JSON-LD
• Spectral Rules
• License
• Features

Maintainers

FN: Kin Lane Email: info@apievangelist.com URL: https://apievangelist.com