MCP For Claude Marketplace
Cryptographic Action Attestor

Cryptographic Action Attestor MCP Connector for Claude

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Creates a tamper-proof audit trail of every agent action using SHA-256 hashing.

2 tools Official Updated Oct 1, 2026 Official Vinkius Partner
More Details Connect to Claude

The Cryptographic Action Attestor MCP server provides an immutable, append-only ledger for tracking agent activities. By using SHA-256 hashing, it ensures that every action--including the tool name, parameters, and timestamp--is cryptographically linked to its predecessor. Use attest_action to record new events and get_audit_log_status to verify that the entire history remains untampered. This server is essential for building autonomous systems where provenance and accountability are critical.

sha256tamper-proofaudit-logprovenanceintegrity

2 tools expose this connector's capabilities to your AI agent.

attest_action

This will compute a SHA-256 hash and append it to the log. Creates a tamper-proof audit trail of an action

get_audit_log_status

Checks the integrity and size of the audit log

See how to talk to your AI agent using Cryptographic Action Attestor.

Record that I just used the 'search_web' tool with parameters {'query': 'weather in London'} at timestamp 1715683200.

Action recorded successfully. Action ID: act_98234, Hash: 5e884898da28047151d0e56f8dc6292773603d0d6aabbdd62a11ef721d9ac6ca, Integrity Valid: true

Check if the audit log is still valid and hasn't been tampered with.

The audit log integrity is valid. Total entries in the ledger: 12.

Show me the recent actions recorded in the system.

The following actions were found: 1. tool: search_web, timestamp: 1715683200; 2. tool: calculate_sum, timestamp: 1715683500.

The server uses SHA-256 hashing to create a cryptographic fingerprint for every action. When you call `get_audit_log_status`, the system recomputes all hashes in the log and compares them against the stored values to detect any unauthorized changes.

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