# Where Did My Tokens Go? Tracing Claude Agents with OpenTelemetry and Sentry

> CJ Avilla from Anthropic sent his Claude Platform OpenTelemetry data to Sentry and found an old project still burning tokens. Join us live to follow that trace, and the next one.

**URL:** https://sentry.io/resources/claude-otel-workshop/

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**Type:** Workshop | **Date:** 2026-11-17T10:00-08:00

**Tags:** OpenTelemetry, AI

Agent cost is more than the model call. When a tool call hits a slow or broken backend, the agent retries, and every retry costs tokens. Without one connected trace, you can’t see that the spend started in your API or your database.

That kind of spend is easy to miss. CJ Avilla from Anthropic sent his Claude Platform OpenTelemetry data to Sentry and found an old project still burning tokens. Join us live as we follow that trace, and the next one.

In this session, we will cover:

- Sending Claude Platform OTel data to Sentry
- The forgotten project that was quietly spending tokens
- A Claude agent calling tools against a backend and database with Sentry tracing
- Failed tool calls, retries, and the final success, all in one trace
- Where to fix it: the prompt, the tool, or the service behind it

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*Source: [sentry.io/resources/claude-otel-workshop/](https://sentry.io/resources/claude-otel-workshop/)*