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Overview

Moda automatically tracks your Anthropic Claude API calls. Messages, streaming, extended thinking, tool use, and content blocks are all captured with no additional code required.

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Setup

pip install moda-ai anthropic

import moda
from anthropic import Anthropic

moda.init("YOUR_MODA_API_KEY")

client = Anthropic()
response = client.messages.create(
    model="claude-sonnet-4-20250514",
    max_tokens=1024,
    messages=[{"role": "user", "content": "Hello!"}]
)

moda.flush()

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Supported Features

FeatureCaptured
MessagesYes
Streaming (messages.stream)Yes
Extended thinkingYes (captured as thinking content blocks)
Tool useYes (captured as tool_use / tool_result content blocks)
System promptsYes
Content blocks (text, image)Yes
Token usageYes (input, output, reasoning tokens)
Model nameYes (request and response)

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Extended Thinking

When using extended thinking, reasoning tokens and thinking content blocks are automatically captured. 
response = client.messages.create(
    model="claude-sonnet-4-20250514",
    max_tokens=16000,
    thinking={
        "type": "enabled",
        "budget_tokens": 10000,
    },
    messages=[{"role": "user", "content": "Explain quantum computing"}]
)
Moda captures:
  • The thinking content as thinking content blocks
  • Reasoning token count for cost tracking
  • The final text response

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Tool Use

Anthropic tool use is automatically captured with full request/response details: 
response = client.messages.create(
    model="claude-sonnet-4-20250514",
    max_tokens=1024,
    tools=[{
        "name": "get_weather",
        "description": "Get the weather for a location",
        "input_schema": {
            "type": "object",
            "properties": {
                "location": {"type": "string"}
            }
        }
    }],
    messages=[{"role": "user", "content": "What's the weather in London?"}]
)

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Streaming

Streaming is fully supported: 
with client.messages.stream(
    model="claude-sonnet-4-20250514",
    max_tokens=1024,
    messages=[{"role": "user", "content": "Count to 5"}]
) as stream:
    for text in stream.text_stream:
        print(text, end="")

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Troubleshooting

Data not appearing?
  • Ensure moda.init() is called before creating the Anthropic client
  • Call moda.flush() (Python) or await Moda.flush() (Node.js) before exit
  • Verify your API key is correct
Extended thinking not captured?
  • Ensure you’re using a model that supports extended thinking
  • Check that the thinking parameter is properly configured
For full SDK documentation, see the Python SDK or Node.js SDK guides.