Rubric Protocol
Hooks Claude into a cryptographically anchored compliance trail for regulated AI deployments. Exposes eight tools including attest for post-quantum signed decision records that anchor to Hedera mainnet, verify for checking attestations by ID, and framework_detect for mapping decisions to EU AI Act, SR 11-7, HIPAA, or NIST AI RMF requirements. Ships with a free local tier that needs no API key. The register_agent tool gets you credentials directly from Claude's interface without opening a browser. Reach for this when you need auditable proof chains for healthcare, financial services, or any context where Article 12 transparency logs or federal AI regulations apply.
- tools
- 15
- auth
- Secret needed
- transport
- STDIO
- env var
- 1
- last updated
- Apr 17, 2026
Tools
15 toolsPublic tool metadata for what this MCP can expose to an agent.
attestAttest an AI decision (local free, HCS with key).
Attest an AI decision (local free, HCS with key).
No parameter schema in public metadata yet.
verifyVerify attestation by ID.
Verify attestation by ID.
No parameter schema in public metadata yet.
get_proofZK Merkle inclusion proof.
ZK Merkle inclusion proof.
No parameter schema in public metadata yet.
register_agentRequest free developer API key.
Request free developer API key.
No parameter schema in public metadata yet.
statusFederation health.
Federation health.
No parameter schema in public metadata yet.
framework_detectAuto-detect regulatory frameworks.
Auto-detect regulatory frameworks.
No parameter schema in public metadata yet.
cost_estimateMonthly cost projection.
Monthly cost projection.
No parameter schema in public metadata yet.
compliance_tagAttach framework tags (Standard+).
Attach framework tags (Standard+).
No parameter schema in public metadata yet.
bundle_queryQuery bundles (Standard+).
Query bundles (Standard+).
No parameter schema in public metadata yet.
screen_entitySanctions/export-control screening across OFAC SDN + Consolidated, UN, UK OFSI, EU, and BIS lists (76K+ entries).
Sanctions/export-control screening across OFAC SDN + Consolidated, UN, UK OFSI, EU, and BIS lists (76K+ entries).
No parameter schema in public metadata yet.
attested_inferencegpt-4o-mini completion plus attestation binding prompt hash, response hash, exact model version, timestamp.
gpt-4o-mini completion plus attestation binding prompt hash, response hash, exact model version, timestamp.
No parameter schema in public metadata yet.
agent_recordUnforgeable operating history for any agent attesting through Rubric.
Unforgeable operating history for any agent attesting through Rubric.
No parameter schema in public metadata yet.
wallet_recordAttested x402 payment history for any Base/EVM buyer wallet, from an append-only settlement ledger.
Attested x402 payment history for any Base/EVM buyer wallet, from an append-only settlement ledger.
No parameter schema in public metadata yet.
verify_auditIndependent audit of any Rubric attestation: signature, HCS sequence, mirror-node confirmation.
Independent audit of any Rubric attestation: signature, HCS sequence, mirror-node confirmation.
No parameter schema in public metadata yet.
hedera_factOne attested Hedera network fact (exchange rate, gas, supply, nodes, throughput, topic state).
One attested Hedera network fact (exchange rate, gas, supply, nodes, throughput, topic state).
No parameter schema in public metadata yet.
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RUBRIC_API_KEYsecretRubric API key for Hedera mainnet anchoring. Optional — omit for free local PQ-signed attestation.
Readme
@rubric-protocol/mcp-server
Post-quantum AI compliance attestation as an MCP server. Works with Claude Desktop, Claude Code, Cursor, Windsurf, Continue, Zed, and any MCP-compatible host.
v2.0 — now with free local tier. No API key required to start attesting.
Install
npm install -g @rubric-protocol/mcp-server
Configure (Claude Desktop)
Edit claude_desktop_config.json:
{
"mcpServers": {
"rubric": {
"command": "npx",
"args": ["-y", "@rubric-protocol/mcp-server"],
"env": { "RUBRIC_API_KEY": "optional-for-hcs-anchoring" }
}
}
}
Restart Claude Desktop. Rubric tools appear in the MCP menu.
Tiers
Free (no key)
attest— PQ-signed Merkle leaves stored in~/.rubric/local-bundles/verify— check local attestationsframework_detect— detect applicable regulations offlinecost_estimate— project monthly costregister_agent— request a free key to unlock HCS anchoringstatus— federation health
Details
- Repository
- github.com/0xsims/rubric-mcp-server
- Package
@rubric-protocol/mcp-server- Transport
- STDIO
- Auth
- Required
- Registry
- MCP registry, active