ddapm-test-agent
Test agent for Datadog APM client libraries
Decision gist · record as of 2026-08-14
Yes. The package is actively maintained, has no known vulnerabilities, and is purpose-built for testing Datadog APM integrations. Install it if you develop or maintain a Datadog APM client library or need to validate trace behavior in CI/CD. The low install friction and permissive license make it a straightforward addition to test infrastructure.AI-flagged interpretation of the facts on this page — verify before relying
Before you install
- Binds to 127.0.0.1 by default; pass --host 0.0.0.0 to accept connections from other hosts.
- Low friction installation with a pure Python wheel.
- Active maintenance with a release on 2026-08-14.
License · maintenance · safety
BSD 3 (permissive) — BSD 3 permissive license allows use in commercial and open-source projects with minimal restrictions, requiring only preservation of copyright and license notices.
last release 2026-08-14 (0 days) · last repo commit 2026-08-14 · 82 stars
0 known vulnerabilities (OSV.dev, 2026-08-14) · 3,346,621 downloads/mo, #2,653 on PyPI
Alternatives
Verify before relying
pip install ddapm-test-agent
ddapm-test-agent --port=8126 --otlp-http-port=4318 --otlp-grpc-port=4317 --web-ui-port=8080- Whether the Web UI is production-ready or remains experimental in current releases.
- Performance characteristics when handling high-volume trace payloads or many concurrent sessions.
- Compatibility with APM client libraries beyond the Datadog ecosystem.
What it is and what it does
The Datadog APM test agent is a mock server that emulates the endpoints of the production Datadog agent, allowing developers to test APM client libraries in isolation without a running Datadog infrastructure. It listens on configurable ports for HTTP traces (8126), OTLP HTTP (4318), and OTLP gRPC (4317), and provides a web UI for inspecting received traces and managing test sessions.
The agent performs trace invariant checks (trace count headers, tracer version headers, content length validation), stores all submitted data for retrieval via API, and supports snapshot testing for characterization-based regression detection. It can proxy requests to a real Datadog agent or forward LLM observability events directly to Datadog. It also records and replays third-party API calls (OpenAI, Azure OpenAI, DeepSeek) for reproducible testing.
Use it for
- Test Datadog APM client libraries locally without deploying a full Datadog agent or cloud infrastructure.
- Validate trace structure and metadata compliance in integration tests using snapshot testing.
- Record and replay third-party API interactions (OpenAI, Azure OpenAI, DeepSeek) for deterministic LLM observability testing.
- Debug trace payload issues by inspecting received requests and trace trees via the web UI.
- Proxy traces to a real Datadog agent for selective validation while testing client library changes.
Worth the install?
AI-flagged interpretation of the facts on this page. Verify before relying on it.
Yes.
The package is actively maintained, has no known vulnerabilities, and is purpose-built for testing Datadog APM integrations. Install it if you develop or maintain a Datadog APM client library or need to validate trace behavior in CI/CD. The low install friction and permissive license make it a straightforward addition to test infrastructure.
Install
ddapm-test-agent on PyPI
Before you install
Low friction installation with a pure Python wheel. Active maintenance with a release on 2026-08-14. Requires 13 runtime dependencies including aiohttp, protobuf, and grpcio, which are standard libraries for HTTP and gRPC services.
Binds to 127.0.0.1 by default; pass --host 0.0.0.0 to accept connections from other hosts.
License in practice
BSD 3 permissive license allows use in commercial and open-source projects with minimal restrictions, requiring only preservation of copyright and license notices.
Quickstart
pip install ddapm-test-agent
ddapm-test-agent --port=8126 --otlp-http-port=4318 --otlp-grpc-port=4317 --web-ui-port=8080Verify before relying
- Whether the Web UI is production-ready or remains experimental in current releases.
- Performance characteristics when handling high-volume trace payloads or many concurrent sessions.
- Compatibility with APM client libraries beyond the Datadog ecosystem.
Package facts
| License | BSD 3 permissive |
| Python support | Supports the current Python release >=3.8 |
| Install friction | Low. Pure-Python wheel |
| Runtime dependencies | 13 packagesaiohttpddsketchmsgpackrequeststyping_extensionsyarlrequests-aws4authjinja2pyyamlopentelemetry-protoprotobufgrpciopywin32 |
| Maintenance | Actively maintained 0 days since the last release |
| Last repo commit | |
| First released | |
| Downloads | 3,346,621 / month, #2,653 on PyPI 30-day window, as of 2026-08-14 |
| Known vulnerabilities | None known OSV.dev, checked 2026-08-14 |
| Classifiers | Programming Language :: PythonProgramming Language :: Python :: 3.11Programming Language :: Python :: 3.12Programming Language :: Python :: 3.13 |
Evidence: ddapm_test_agent-1.65.0-py3-none-any.whl
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See also datadog-checks-base · dda · ddtrace · scout-apm · claude-tap · apm-cli · opentelemetry-instrumentation-openai-agents · elastic-apm · google-python-cloud-debugger · openinference-instrumentation-claude-agent-sdk