Bazel

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.

Bazel Build Event Protocol is one of 5 APIs that Bazel publishes on the APIs.io network.

Tagged areas include BEP, BES, Build Events, Observability, and Streaming. The published artifact set on APIs.io includes API documentation.

Documentation GitHub

Documentation

https://bazel.build/remote/bep

https://bazel.build/remote/bep-examples

Other Resources

https://github.com/bazelbuild/bazel/blob/master/src/main/java/com/google/devtools/build/lib/buildeventstream/proto/build_event_stream.proto

API entry from apis.yml

aid: bazel-build:bazel-build-event-protocol
name: Bazel Build Event Protocol
description: 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.
humanURL: https://bazel.build/remote/bep
tags:
- BEP
- BES
- Build Events
- Observability
- Streaming
properties:
- type: Documentation
  url: https://bazel.build/remote/bep
- type: Documentation
  url: https://bazel.build/remote/bep-examples
- type: ProtocolBuffer
  url: https://github.com/bazelbuild/bazel/blob/master/src/main/java/com/google/devtools/build/lib/buildeventstream/proto/build_event_stream.proto