Add capacity-attest to Open Source & SDKs - #651
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capacity-attest is a small open-source MCP server for signed delivery claims on x402 trades where "delivered" is metered or duration-based (GPU-hours, storage, API credits, bandwidth) rather than a single request/response payload.
After an x402 payment settles, the paying agent signs a plain factual record (delivered: yes/no/partial, what was promised, evidence hash, settlement ref) with EIP-191, and it's appended to a public, per-seller, append-only history. No reputation score, no ranking, just verifiable-offline signed facts a future buyer can check before paying the same seller.
New, zero external users so far. Adding it next to TrustBench since it's the closest existing entry in spirit (signed receipts, verifiable offline) but targets metered/continuous delivery specifically.