Show HN: Free attestation for AI agent decisions – verifying one costs $0.10

Category: security

Tags: ai-agents, attestation, audit-trail, post-quantum, merkle-proofs, x402

Score: 6.8/10 (Innovation: 7, Technical: 7, Documentation: 8, Utility: 5)

Rubric Decision Attestation lets AI agents attest their decisions for free, with verification priced at $0.10 via x402. It uses a hashes-only core (SHA3-256 over JCS) with post-quantum threshold signatures and Hedera mainnet anchoring to create tamper-evident audit trails. The inverted pricing model addresses the gap in audit-trail products caused by selective attestation, but the project is early-stage with a closed signing federation and limited batch rollout.

Target audience: AI engineers, compliance teams, backend devs building auditable AI systems

Repository: https://github.com/0xsims/rubric-attest · TypeScript · Apache-2.0

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