tfy_tracing_list_projects()

TFY_API_SH=~/.claude/skills/truefoundry-tracing/scripts/tfy-api.sh

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tfy_tracing_create_project(name="my-tracing-project")

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Save the returned project `id` for the next step.

tfy_tracing_create_application(project_id="PROJECT_ID", name="my-app")

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> **Fallback**: If any of these API endpoints return 404, the tracing API may have changed. Direct the user to create the tracing project via the TrueFoundry UI at `$TFY_BASE_URL` → Tracing section, then return here with the project FQN.

pip install traceloop-sdk

npm install @traceloop/node-server-sdk

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Replace placeholders:
- `<APP_NAME>` — the application name (e.g., "my-chatbot")
- `<TFY_BASE_URL>` — from environment or `.env`
- `<TFY_API_KEY>` — from environment or `.env`
- `<TRACING_PROJECT_FQN>` — the tracing project FQN from Step 2

**Best practice**: Read `TFY_BASE_URL` and `TFY_API_KEY` from environment variables:

```python
import os
from traceloop.sdk import Traceloop

Traceloop.init(
    app_name="<APP_NAME>",
    api_endpoint=f"{os.environ['TFY_BASE_URL']}/api/otel",
    headers={
        "Authorization": f"Bearer {os.environ['TFY_API_KEY']}",
        "X-TFY-TRACING-PROJECT-FQN": "<TRACING_PROJECT_FQN>",
    },
    disable_batch=False,
)

// --- Traceloop init MUST be before any LLM imports ---
import * as traceloop from "@traceloop/node-server-sdk";

traceloop.initialize({
  appName: "<APP_NAME>",
  apiEndpoint: `${process.env.TFY_BASE_URL}/api/otel`,
  headers: {
    Authorization: `Bearer ${process.env.TFY_API_KEY}`,
    "X-TFY-TRACING-PROJECT-FQN": "<TRACING_PROJECT_FQN>",
  },
  disableBatch: false,
});

// --- Now import LLM libraries ---
// import OpenAI from "openai";
// etc.

from traceloop.sdk.decorators import workflow, task, agent, tool

@workflow(name="rag_pipeline")
def run_pipeline(query: str):
    context = retrieve(query)
    return generate(query, context)

@task(name="retrieve_context")
def retrieve(query: str):
    # retrieval logic
    ...

@task(name="generate_response")
def generate(query: str, context: str):
    # LLM call
    ...

@agent(name="research_agent")
def research_agent(topic: str):
    # agent logic
    ...

@tool(name="web_search")
def web_search(query: str):
    # tool logic
    ...

import { withWorkflow, withTask, withAgent, withTool } from "@traceloop/node-server-sdk";

const runPipeline = withWorkflow({ name: "rag_pipeline" }, async (query: string) => {
  const context = await retrieve(query);
  return generate(query, context);
});

const retrieve = withTask({ name: "retrieve_context" }, async (query: string) => {
  // retrieval logic
});

const generate = withTask({ name: "generate_response" }, async (query: string, context: string) => {
  // LLM call
});

from opentelemetry.sdk.trace.sampling import ParentBased, TraceIdRatioBased

Traceloop.init(
    app_name="<APP_NAME>",
    api_endpoint=f"{os.environ['TFY_BASE_URL']}/api/otel",
    headers={
        "Authorization": f"Bearer {os.environ['TFY_API_KEY']}",
        "X-TFY-TRACING-PROJECT-FQN": "<TRACING_PROJECT_FQN>",
    },
    disable_batch=False,
    sampler=ParentBased(root=TraceIdRatioBased(0.1)),  # 10% sampling
)

import { ParentBasedSampler, TraceIdRatioBasedSampler } from "@opentelemetry/sdk-trace-base";

traceloop.initialize({
  appName: "<APP_NAME>",
  apiEndpoint: `${process.env.TFY_BASE_URL}/api/otel`,
  headers: {
    Authorization: `Bearer ${process.env.TFY_API_KEY}`,
    "X-TFY-TRACING-PROJECT-FQN": "<TRACING_PROJECT_FQN>",
  },
  disableBatch: false,
  sampler: new ParentBasedSampler({ root: new TraceIdRatioBasedSampler(0.1) }), // 10%
});

Check that TFY_API_KEY is valid and not expired.
Regenerate at $TFY_BASE_URL → Settings → API Keys.

1. Verify Traceloop.init() is called BEFORE LLM library imports — this is the #1 cause.
2. Check that api_endpoint ends with /api/otel (not /api/otel/).
3. Verify X-TFY-TRACING-PROJECT-FQN header matches the project FQN exactly.
4. Set disable_batch=True temporarily to force immediate export and check for errors.
5. Check application logs for OTLP export errors.

Run: pip install traceloop-sdk
Ensure you're installing in the correct virtual environment.

Traceloop.init() must be called BEFORE importing the LLM library.
Move the init call to the very top of your entry point file.

Add sampling — see Step 7 for ParentBased(TraceIdRatioBased) configuration.
Start with 10% sampling (0.1) and adjust based on needs.

The tracing API endpoints may differ on your TrueFoundry version.
Create the tracing project via the TrueFoundry UI instead:
$TFY_BASE_URL → Tracing → New Project
Then use the project FQN in your Traceloop.init() configuration.