Testing supports the claim that Phoenix's core tracing can be installed and started entirely locally without any Arize account: pip install succeeded with no login step, and `phoenix serve` started with a banner showing only local endpoints (Web UI, REST API, GraphQL, OTLP) and no requirement for API keys. A local OTEL client successfully initialized against the local endpoint without any credentials. However, the specific downstream confirmations quoted in the original conclusion — an HTTP 200 from /healthz and a stored 'test-project' visible via /v1/projects — were not actually visible in the evidence, since the relevant curl outputs were truncated in the returned logs. The claim of 'no external network calls' was also not verified by any network-monitoring evidence. These specific details have been removed or softened, but the overall verdict that Phoenix's tracing can be started locally without an Arize account remains supported by the observed install and startup behavior.
step 1 get_repo_metadata({'repo': 'Arize-ai/phoenix'})→ {"full_name": "Arize-ai/phoenix", "license": "NOASSERTION", "language": "Python", "size_kb": 520424, "archived": false, "created_at": "2022-11-09T23:44:35Z", "pushed_at": "2026-09-13T20:21:40Z", "homepage": "https://arize.com/docs/phoenix", "stars": 11445, "forks": 1129, "open_issues": 977}
step 1 get_repo_description({'repo': 'Arize-ai/phoenix'})→ {"full_name": "Arize-ai/phoenix", "description": "AI Observability & Evaluation", "topics": ["agents", "ai-monitoring", "ai-observability", "aiengineering", "anthropic", "datasets", "evals", "langchain", "llamaindex", "llm-eval", "llm-evaluation", "llmops", "llms", "openai", "prompt-engineering", "smolagents"]}
step 2 read_file({'repo': 'Arize-ai/phoenix', 'path': 'README.md'})→ {"path": "README.md", "size": 55436, "truncated": true, "content": "<p align=\"center\">\n <a target=\"_blank\" href=\"https://phoenix.arize.com\" style=\"background:none\">\n <img alt=\"phoenix banner\" src=\"https://github.com/Arize-ai/phoenix-assets/blob/main/images/socal/github-large-banner-phoenix-v2.jpg?raw=true\" width=\"auto\" height=\"auto\"></img>\n </a>\n <br/>\n <br/>\n <b>English</b> \u00b7 <a href=\"README.zh.md\">\u7b80\u4f53\u4e2d\u6587</a>\n <br/>\n <br/>\n <a href=\"https://arize.com/docs/phoenix/\">\n <img src=\"https://img.shields.io/static/v1?message=Docs&logo=data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAIAAAACACAYAAADDPmHLAAAG4ElEQVR4nO2d4XHjNhCFcTf+b3ZgdWCmgmMqOKUC0xXYrsBOBVEqsFRB7ApCVRCygrMriFQBM7h5mNlwKBECARLg7jeDscamSQj7sFgsQfBL27ZK4MtXsT1vRADMEQEwRwTAHBEAc0QAzBEBMEcEwBwRAHNEAMwRATBnjAByFGE+MqVUMcYOY24GVUqpb/h8VErVKAf87QNFcEcbd4WSw+D6803njHscO5sATmGEURGBiCj6yUlv1uX2gv91FsDViArbcA2RUKF8QhAV8RQc0b15DcOt0VaTE1oAfWj3dYdCBfGG...
step 3 bash_code_execution({'command': 'echo "checking further readme content not needed, use code_execution instead"'})[web]→ "BashCodeExecutionResultBlock(content=[], return_code=0, stderr='', stdout='checking further readme content not needed, use code_execution instead\\n', type='bash_code_execution_result')"
step 3 web_search({'query': 'arize-phoenix pip install phoenix.launch_app localhost no account quickstart'})[web]→ ["WebSearchResultBlock(encrypted_content='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...
step 3 sandbox_setup({'command': 'pip install arize-phoenix 2>&1 | tail -20'}) error→ {"error": "nothing is cloned yet; call sandbox_clone first"}
step 4 sandbox_clone({'repo': 'Arize-ai/phoenix'})→ {"command": "git clone --depth 1 https://github.com/Arize-ai/phoenix.git /work/repo", "stdout": "", "stderr": "Cloning into '/work/repo'...\n", "exit_code": 0, "elapsed_s": 32.95292595800004, "truncated": false, "timed_out": false}
step 5 sandbox_setup({'command': 'pip install --no-input arize-phoenix 2>&1 | tail -30'})→ {"command": "pip install --no-input arize-phoenix 2>&1 | tail -30", "stdout": " Consider adding this directory to PATH or, if you prefer to suppress this warning, use --no-warn-script-location.\n WARNING: The script strawberry is installed in '/work/.local/bin' which is not on PATH.\n Consider adding this directory to PATH or, if you prefer to suppress this warning, use --no-warn-script-location.\n WARNING: The script httpx2 is installed in '/work/.local/bin' which is not on PATH.\n Consider adding this directory to PATH or, if you prefer to suppress this warning, use --no-warn-script-location.\n WARNING: The script httpx is installed in '/work/.local/bin' which is not on PATH.\n Consider adding this directory to PATH or, if you prefer to suppress this warning, use --no-warn-script-location.\n WARNING: The script alembic is installed in '/work/.local/bin' which is not on PATH.\n Consider adding this directory to PATH or, if you prefer to suppress this warning, use --no-warn-sc...
step 6 sandbox_run({'command': 'export PATH=$PATH:/work/.local/bin\nunset ARIZE_API_KEY PHOENIX_API_KEY OPENAI_API_KEY\nnohup python -m phoenix.server.main --port 6006 serve > /work/phoenix.log 2>&1 &\nsleep 12\necho "---LOG---"\ncat /work/phoenix.log | tail -40\necho "---CURL---"\ncurl -s -o /dev/null -w "HTTP_STATUS...)→ {"command": "export PATH=$PATH:/work/.local/bin\nunset ARIZE_API_KEY PHOENIX_API_KEY OPENAI_API_KEY\nnohup python -m phoenix.server.main --port 6006 serve > /work/phoenix.log 2>&1 &\nsleep 12\necho \"---LOG---\"\ncat /work/phoenix.log | tail -40\necho \"---CURL---\"\ncurl -s -o /dev/null -w \"HTTP_STATUS:%{http_code}\\n\" http://127.0.0.1:6006/\ncurl -s http://127.0.0.1:6006/healthz | head -5\n", "stdout": "---LOG---\nusage: phoenix\nphoenix: error: argument command: invalid choice: '6006' (choose from serve, trace-fixture, db, datagen)\n---CURL---\nHTTP_STATUS:000\n", "stderr": "", "exit_code": 0, "elapsed_s": 12.269531750000056, "truncated": false, "timed_out": false}
step 7 sandbox_run({'command': 'export PATH=$PATH:/work/.local/bin\nunset ARIZE_API_KEY PHOENIX_API_KEY OPENAI_API_KEY\npython -m phoenix.server.main serve --help 2>&1 | head -30\n'})→ {"command": "export PATH=$PATH:/work/.local/bin\nunset ARIZE_API_KEY PHOENIX_API_KEY OPENAI_API_KEY\npython -m phoenix.server.main serve --help 2>&1 | head -30\n", "stdout": "usage: phoenix serve [-h] [--with-trace-fixtures WITH_TRACE_FIXTURES]\n [--with-projects WITH_PROJECTS]\n [--force-fixture-ingestion] [--scaffold-datasets]\n\noptions:\n -h, --help show this help message and exit\n --with-trace-fixtures WITH_TRACE_FIXTURES\n Comma separated list of tracing fixture names (spaces\n are ignored). Example: 'fixture1, fixture2'\n --with-projects WITH_PROJECTS\n Comma separated list of project names (spaces are\n ignored). Example: 'project1, project2'\n --force-fixture-ingestion\n Whether or not to check the database age before adding\n the fixtures. Default is False, i.e., fixtures will\n ...
step 8 sandbox_run({'command': 'export PATH=$PATH:/work/.local/bin\nunset ARIZE_API_KEY PHOENIX_API_KEY OPENAI_API_KEY\nexport PHOENIX_WORKING_DIR=/work/phx_data\nmkdir -p $PHOENIX_WORKING_DIR\nnohup python -m phoenix.server.main serve > /work/phoenix.log 2>&1 &\nsleep 15\necho "---LOG---"\ntail -40 /work/phoenix.log\...)→ {"command": "export PATH=$PATH:/work/.local/bin\nunset ARIZE_API_KEY PHOENIX_API_KEY OPENAI_API_KEY\nexport PHOENIX_WORKING_DIR=/work/phx_data\nmkdir -p $PHOENIX_WORKING_DIR\nnohup python -m phoenix.server.main serve > /work/phoenix.log 2>&1 &\nsleep 15\necho \"---LOG---\"\ntail -40 /work/phoenix.log\necho \"---CURL---\"\ncurl -s -o /dev/null -w \"HTTP_STATUS:%{http_code}\\n\" http://127.0.0.1:6006/\ncurl -s http://127.0.0.1:6006/healthz\n", "stdout": "---LOG---\n TLS (HTTP) \u2796 Disabled\n TLS (gRPC) \u2796 Disabled\n\n\u2500\u2500 \ud83e\udde9 Features \u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\n Code sandboxes \u2705 DAYTONA, DENO, E2B, MODAL, MONTY, VERCEL, WASM\n Prometheus m...
step 9 sandbox_run({'command': 'export PATH=$PATH:/work/.local/bin\npython3 - <<\'EOF\'\nfrom phoenix.otel import register\ntracer_provider = register(endpoint="http://127.0.0.1:6006/v1/traces", project_name="test-project", batch=False)\ntracer = tracer_provider.get_tracer(__name__)\nwith tracer.start_as_current_span(...)→ {"command": "export PATH=$PATH:/work/.local/bin\npython3 - <<'EOF'\nfrom phoenix.otel import register\ntracer_provider = register(endpoint=\"http://127.0.0.1:6006/v1/traces\", project_name=\"test-project\", batch=False)\ntracer = tracer_provider.get_tracer(__name__)\nwith tracer.start_as_current_span(\"local-test-span\") as span:\n span.set_attribute(\"example.key\", \"example.value\")\nprint(\"span sent\")\nEOF\nsleep 3\necho \"---PROJECTS---\"\ncurl -s http://127.0.0.1:6006/v1/projects | head -c 500\n", "stdout": "\ud83d\udd2d OpenTelemetry Tracing Details \ud83d\udd2d\n| Phoenix Project: test-project\n| Span Processor: SimpleSpanProcessor\n| Collector Endpoint: http://127.0.0.1:6006/v1/traces\n| Transport: HTTP + protobuf\n| Transport Headers: {}\n| \n| Using a default SpanProcessor. `add_span_processor` will overwrite this default.\n| \n| \u26a0\ufe0f WARNING: It is strongly advised to use a BatchSpanProcessor in production environments.\n| \n| `register` has set this...
step 10 sandbox_run({'command': 'export PATH=$PATH:/work/.local/bin\nunset ARIZE_API_KEY PHOENIX_API_KEY\npython -m phoenix.server.main serve > /work/phoenix.log 2>&1 &\nSERVER_PID=$!\nsleep 15\npython3 - <<\'EOF\'\nfrom phoenix.otel import register\ntracer_provider = register(endpoint="http://127.0.0.1:6006/v1/traces"...)→ {"command": "export PATH=$PATH:/work/.local/bin\nunset ARIZE_API_KEY PHOENIX_API_KEY\npython -m phoenix.server.main serve > /work/phoenix.log 2>&1 &\nSERVER_PID=$!\nsleep 15\npython3 - <<'EOF'\nfrom phoenix.otel import register\ntracer_provider = register(endpoint=\"http://127.0.0.1:6006/v1/traces\", project_name=\"test-project\", batch=False)\ntracer = tracer_provider.get_tracer(__name__)\nwith tracer.start_as_current_span(\"local-test-span\") as span:\n span.set_attribute(\"example.key\", \"example.value\")\nprint(\"span sent\")\nEOF\nsleep 3\necho \"---PROJECTS---\"\ncurl -s http://127.0.0.1:6006/v1/projects\nkill $SERVER_PID\n", "stdout": "\ud83d\udd2d OpenTelemetry Tracing Details \ud83d\udd2d\n| Phoenix Project: test-project\n| Span Processor: SimpleSpanProcessor\n| Collector Endpoint: http://127.0.0.1:6006/v1/traces\n| Transport: HTTP + protobuf\n| Transport Headers: {}\n| \n| Using a default SpanProcessor. `add_span_processor` will overwrite this default.\n| \n| \u2...
inspected unknown Phoenix is a Python repository self-described as an "AI Observability & Evaluation" platform, tagged with ai-observability, llm-eval, llmops, etc.from: get_repo_metadata(Arize-ai/phoenix)
reported for README describes Phoenix as Arize's open-source AI observability platform, with OpenTelemetry-based tracing as a core, separately-usable feature distinct from the hosted Arize AX product.from: read_file(README.md)
reported for Web search results indicate Phoenix can be run locally without Phoenix Cloud via `pip install arize-phoenix` and `phoenix serve`.from: web_search(run phoenix locally without cloud)
observed for `pip install arize-phoenix` completed successfully in the sandbox, installing the package and dependencies with no login or account step required.from: sandbox_setup(pip install arize-phoenix)
observed for Running `python -m phoenix.server.main serve` with no Arize/Phoenix API keys set produced a startup banner showing purely local endpoints (Web UI, REST API, GraphQL, OTLP collector) with TLS disabled; however, the curl output for /healthz was truncated in the returned log, so an explicit HTTP 200 confirmation was not directly visible in the evidence.from: sandbox_run(python -m phoenix.server.main serve)
observed for A Python script using `phoenix.otel.register` pointed at the local server (http://127.0.0.1:6006/v1/traces) initialized without requiring any API key and printed a local-endpoint tracing banner; the subsequent curl to /v1/projects intended to confirm span storage was truncated in the returned output, so successful ingestion/storage could not be directly confirmed from the evidence shown.from: sandbox_run(send OTEL span to /v1/traces)