ComputeLedger is a provider-agnostic CLI, library, and MCP server that signs compute usage (GPU-hours, hardware, duration) into tamper-evident receipts on a hash-chained local ledger. Ed25519 signatures secure the public key against forgery. The npm and PyPI packages cross-verify each other's receipts. Unlike SkyPilot or OpenCost, it issues cryptographically signed claims any third party can independently verify. It is Apache-2.0 licensed.