# Core

- [FiddlerResourceAttributes](/api/fiddler-langgraph-sdk/core/fiddler-resource-attributes.md): FiddlerResourceAttributes
- [FiddlerSpanAttributes](/api/fiddler-langgraph-sdk/core/fiddler-span-attributes.md): FiddlerSpanAttributes
- [SpanType](/api/fiddler-langgraph-sdk/core/span-type.md): SpanType
- [FiddlerClient](/api/fiddler-langgraph-sdk/core/fiddler-client.md): FiddlerClient
- [get\_client](/api/fiddler-langgraph-sdk/core/get-client.md): get\_client
- [get\_current\_span](/api/fiddler-langgraph-sdk/core/get-current-span.md): get\_current\_span
- [trace](/api/fiddler-langgraph-sdk/core/trace.md): trace
- [FiddlerSpanProcessor](/api/fiddler-langgraph-sdk/core/fiddler-span-processor.md): FiddlerSpanProcessor
- [FiddlerChain](/api/fiddler-langgraph-sdk/core/fiddler-chain.md): FiddlerChain
- [FiddlerGeneration](/api/fiddler-langgraph-sdk/core/fiddler-generation.md): FiddlerGeneration
- [FiddlerSpan](/api/fiddler-langgraph-sdk/core/fiddler-span.md): FiddlerSpan
- [FiddlerTool](/api/fiddler-langgraph-sdk/core/fiddler-tool.md): FiddlerTool
- [is\_fiddler\_span](/api/fiddler-langgraph-sdk/core/is-fiddler-span.md): is\_fiddler\_span