ComputeLedger

What is ComputeLedger, and why does it exist

ComputeLedger is an open-source CLI, library, and MCP server for producing and verifying cryptographically signed records of compute usage. It exists because compute usage claims (GPU-hours consumed, hardware used, workload duration) currently have no portable, offline-verifiable proof format: a billing dashboard is only as trustworthy as the provider issuing it, and it only covers that one provider. ComputeLedger's receipts are self-contained, signed JSON objects that any party, on any machine, in either of two independently maintained language implementations, can verify without a network call or a trusted third party.

Does ComputeLedger require an account or API key?No. Everything runs locally. Keys are generated and stored on your own machine (~/.computeledgeror./.computeledgerwith--local).

Can a receipt be forged?Not without the private key used to sign it.verifyrecomputes the payload hash and checks the Ed25519 signature against the embedded public key; the public key itself is part of the signed payload, so substituting a different key changes the hash and invalidates the receipt.

What happens if there's no GPU?computeledger rundegrades gracefully: it records wall-clock duration and whatever--hardware/--provideryou specify, and simply omits GPU utilization samples ifnvidia-smiisn't found.

Does this compete with SkyPilot or OpenCost?No, see the comparison table above. Those tools solve orchestration and cost visibility; ComputeLedger solves independent verifiability of a usage claim. The two are complementary: run SkyPilot or OpenCost for orchestration and cost, and drop ComputeLedger in wherever you need a signed record.

Is the receipt format a blockchain?It's a local, hash-chained, append-only log, similar in spirit to a Merkle log or a git commit chain. There's no token, no consensus mechanism, and no network involved.

Does ComputeLedger work on Windows?The npm and PyPI packages install and run on any platform Node.js 18+ or Python 3.10+ supports, including Windows. One caveat: private key files are written with POSIX permission bits (mode 600), which restrict access on Linux and macOS; Windows does not enforce the same POSIX permission model, so the file is written but the access restriction has no equivalent effect there. CI currently runs on Linux only, so Windows and macOS are not continuously tested upstream.

Can I use ComputeLedger for commercial projects?Yes. Both the TypeScript and Python packages are licensed Apache-2.0, which permits commercial use, modification, and redistribution, including in closed-source products, as long as the license and copyright notice are preserved.

What if I need multi-cloud orchestration or a cost dashboard instead?ComputeLedger doesn't do either. It only produces and verifies signed usage receipts. Pair it with SkyPilot for orchestration or OpenCost for cost visibility if you need those.

Issues and pull requests are welcome. Runnpm test(TypeScript) orpytest(python/) before opening a PR: both language implementations ship a full test suite, and any change touching the receipt or canonical-JSON format must keep both sides interoperable (seeCONTRIBUTING.md).

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