> ## Documentation Index
> Fetch the complete documentation index at: https://docs.validationcloud.io/llms.txt
> Use this file to discover all available pages before exploring further.

# Debug API

Traces need the state of the traced block, so the Debug API works for the last 127 blocks, about 4 minutes on Mantle Mainnet. Older blocks return JSON-RPC error `-32000` with the message `required historical state unavailable (reexec=128)`.


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