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Kavra Siegel — Qualified eIDAS Timestamping

io.github.mscharfetter/kavra-siegel
Legal & Compliance Security Unavailable MCP 2026-07-28

What this MCP does

Creates and verifies qualified eIDAS RFC 3161 timestamps for content or SHA-256 hashes.

Capabilities

Tools

3 tools
kavra_siegel_stamp_content
Erzeugt einen qualifizierten eIDAS-Zeitstempel für base64-encodierten Inhalt (max 1 MB). Hash wird serverseitig berechnet. RFC 3161 via SIGNIUS/IDnow.
Input schema 
{'type': 'object', 'required': ['content_b64'], 'properties': {'tier': {'enum': ['basic', 'plus', 'sealed'], 'type': 'string', 'default': 'basic'}, 'metadata': {'type': 'object'}, 'content_b64': {'type': 'string', 'description': 'Base64-encoded content to stamp'}}}
kavra_siegel_stamp_hash
Erzeugt einen qualifizierten eIDAS-Zeitstempel für einen SHA-256-Hash. RFC 3161 via SIGNIUS/IDnow Trust Services AB (EU Trusted List).
Input schema 
{'type': 'object', 'required': ['sha256_hex'], 'properties': {'tier': {'enum': ['basic', 'plus', 'sealed'], 'type': 'string', 'default': 'basic', 'description': 'Stamp tier (basic=hash-only, plus=with URL, sealed=full content)'}, 'metadata': {'type': 'object', 'description': 'Optional key-value metadata persisted with the stamp'}, 'sha256_hex': {'type': 'string', 'pattern': '^[a-f0-9]{64}$', 'description': 'Lowercase 64-char hex SHA-256 hash'}}}
kavra_siegel_verify_token
Verifiziert einen Stempel-Token anhand seiner UUID.
Input schema 
{'type': 'object', 'required': ['token_id'], 'properties': {'token_id': {'type': 'string', 'format': 'uuid', 'description': 'UUID of the stamp token to verify'}}}
History

Recent tool changes

Added
kavra_siegel_verify_token
Sept. 17, 2026, 12:45 p.m.
Added
kavra_siegel_stamp_content
Sept. 17, 2026, 12:45 p.m.
Added
kavra_siegel_stamp_hash
Sept. 17, 2026, 12:45 p.m.
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