{"status":"attested","page":"https://annalist.dev/mcp/ai.getvda/langchain-login-and-token-agent","statement":{"type":"annalist.mcp-check/v1","issuer":"https://annalist.dev","subject":{"name":"ai.getvda/langchain-login-and-token-agent","url":"https://authenticated-mcp-agent-langchain-core.getvda.ai/mcp"},"issued_at":"2026-10-18T01:02:17Z","valid_until":"2026-10-25T01:02:17Z","grade":"A","score":100,"facts":{"probes_7d":4,"up_pct_7d":100,"median_ms":644,"access":"open","tools_count":2,"tools_changed_14d":false,"last_tools_change":null,"domain_age_days":null,"registry_status":"active"},"flags":[],"reasons":["+: answered 100% of our probes in 7 days"],"method":"mcp-1","evidence":{"probes":"derived/checks/mcp/probes/","ledger":"https://github.com/ryanroskowski/annalist-ledger"}},"signature":"xKxxg0sW4xZzbA7z4mUjQgN0RBRot1-pJ8SB2Sr2z_3G85Ax7be_9s1pSx3Y_gs2HBdlCocqXBU2333JrZj5Dw","key_id":"187e49f200625a2f","public_key_url":"https://api.annalist.dev/.well-known/annalist-key.json","how_to_verify":"Ed25519 signature (base64url) over the RFC 8785 canonical JSON of `statement`, checked with the public key at https://api.annalist.dev/.well-known/annalist-key.json (key_id must match). Then check valid_until. The probes behind it are archived daily, and each day's archive hashes are in the public ledger."}