SpyLLM Python SDK

Framework-agnostic agent observability and automatic LLM tracing. Works with OpenAI, Anthropic, CrewAI, AutoGen, LangGraph, and any OpenTelemetry-instrumented framework.

See it in action — view a live trace on the dashboard

Prerequisites

You need a free SpyLLM account and an API key to use this SDK.

1. Sign up at spyllm.dev/sign-up
2. Go to Settings → API Keys and click Create API Key
3. Copy the key — it is only shown once

Install

pip install spyllm

With provider extras:

pip install spyllm[openai]       # OpenAI
pip install spyllm[anthropic]    # Anthropic
pip install spyllm[otel]         # OpenTelemetry export

Quick Start

import spyllm

spyllm.init(api_key="sk-...")

# That's it. Every OpenAI and Anthropic call is now automatically traced.
from openai import OpenAI

client = OpenAI()
response = client.chat.completions.create(
    model="gpt-4o",
    messages=[{"role": "user", "content": "Hello!"}],
)
# Prompt, response, tokens, cost, and latency are captured automatically.

Open the dashboard to see traces as they arrive.

Agent Observability

Wrap multi-agent workflows with agent_span() to automatically link every nested LLM call into a trace DAG. Nested spans inherit trace_id and set parent_span_id automatically — no manual ID threading needed.

import spyllm
from openai import OpenAI

spyllm.init(api_key="sk-...")
client = OpenAI()

with spyllm.agent_span("orchestrator", role="orchestrator"):
    plan = client.chat.completions.create(
        model="gpt-4o",
        messages=[{"role": "user", "content": "Plan the research task"}],
    )

    with spyllm.agent_span("researcher", role="worker"):
        research = client.chat.completions.create(
            model="gpt-4o",
            messages=[{"role": "user", "content": "Research quantum computing"}],
        )

    with spyllm.agent_span("writer", role="worker"):
        report = client.chat.completions.create(
            model="gpt-4o",
            messages=[{"role": "user", "content": "Write the report"}],
        )

# All spans share the same trace_id.
# Open the dashboard to see the full agent topology as an interactive DAG.

Async Support

The async variant works identically with asyncio, which most agent frameworks use:

async with spyllm.async_agent_span("planner", role="planner") as ctx:
    print(ctx.trace_id)       # auto-generated
    print(ctx.span_id)        # unique per span
    print(ctx.parent_span_id) # from outer span, if any

Reading Span Context

Access the current span anywhere in your code:

ctx = spyllm.get_current_span()
if ctx:
    print(f"Currently inside: {ctx.agent_name} (trace={ctx.trace_id})")

Span Parameters

Parameter	Type	Default	Description
name	str	required	Human-readable agent name
role	str	"worker"	Agent role for topology grouping
operation	str	"invoke_agent"	One of: invoke_agent, create_agent, execute_tool, chat
trace_id	str	auto-inherited	Override trace ID
framework	str	None	Framework identifier: crewai, autogen, langgraph, custom
input_source	str	None	What triggered this span: user, agent:planner, tool:search

Framework Adapters

One line of code gives you full agent topology for supported frameworks. Adapters use OpenTelemetry instrumentation libraries when available, with lightweight monkey-patch fallbacks.

CrewAI

import spyllm

spyllm.init(api_key="sk-...")
spyllm.adapters.instrument_crewai()

from crewai import Agent, Task, Crew
# All CrewAI agent/task/tool spans are captured automatically.

Any OTel-Instrumented Framework (Zero SDK Code)

Point any framework's OpenTelemetry exporter at SpyLLM:

export OTEL_EXPORTER_OTLP_ENDPOINT=https://api.spyllm.dev
export OTEL_EXPORTER_OTLP_HEADERS="X-API-Key=sk-your-key"

This works with CrewAI (opentelemetry-instrumentation-crewai), LangGraph (LANGSMITH_OTEL_ENABLED=true), AutoGen, PydanticAI, and any framework that emits gen_ai.* semantic convention spans.

What Gets Captured

Every LLM call automatically records:

• Prompt — full message history sent to the model
• Response — the model's output
• Token count — input + output tokens
• Cost — estimated USD cost based on model pricing
• Latency — wall-clock time for the API call
• Tool calls — if the model invoked tools/functions
• Errors — failed calls with the exception message
• Trace ID / Span ID — every call gets topology IDs, even standalone ones
• Agent Topology — interactive DAG visualization in the dashboard

With agent_span() you additionally get:

• Parent Span ID — builds the parent-child DAG across agents
• Agent Role — orchestrator, worker, planner, etc.
• Operation Name — invoke_agent, execute_tool, chat, create_agent
• Framework — crewai, autogen, langgraph, custom

Supported Providers

Provider	Auto-instrumented
OpenAI	Yes
Anthropic	Yes

Supported Agent Frameworks

Framework	Integration
CrewAI	Adapter (spyllm.adapters.instrument_crewai()) or OTel
AutoGen	OTel env vars
LangGraph	OTel env vars
PydanticAI	OTel env vars
Custom	agent_span() context manager

Advanced Usage

Manual Tracing

from spyllm import SpyLLMClient

client = SpyLLMClient(api_key="sk-...", base_url="https://api.spyllm.dev")
client.trace(
    agent_name="my-agent",
    prompt="What is 2+2?",
    response="4",
    token_count=15,
    cost_usd=0.001,
)

Decorator

from spyllm import agent_trace, init

init(api_key="sk-...")

@agent_trace("my-pipeline")
def run_pipeline(query: str) -> str:
    # your code here
    return result

Disable Auto-instrumentation

spyllm.init(api_key="sk-...", instrument=False)

Documentation

• Quickstart guide
• API reference

Changelog

See GitHub Releases for a full changelog.

License

Proprietary — Copyright SpyLLM. All rights reserved.