Vigil — an outside witness for AI agents
connectsvigilnotary.com
Agent leases, signed receipts, watchdogs, and optional paid source-verification evidence.
https://vigilnotary.com/mcpWebsiteNo authMCP 2026-07-28v0.1-mvplast checked 20 Oct 2026spoke MCP on 100% of 82 checks (30 days)initialize in 255 msWill my client connect?
Decided from what the probe found at the endpoint, and from what each client's own documentation says it can complete. Every row carries the day that documentation was read.
✓Claude CodeConnects
The endpoint answers an anonymous handshake, so no credential is needed.
claude mcp add --transport http vigil-an-outside-witness-for-ai-agents https://vigilnotary.com/mcpClaude Code docs · read on 2026-08-30
✓Claude (claude.ai & Desktop)Connects
The endpoint answers an anonymous handshake, so no credential is needed.
Settings → Connectors → Add custom connector, then paste https://vigilnotary.com/mcp.
Claude (claude.ai & Desktop) docs · read on 2026-08-30
✓ChatGPTConnects
The endpoint answers an anonymous handshake, so no credential is needed.
Settings → Apps → Advanced settings → Developer mode, then create a connector pointing at https://vigilnotary.com/mcp.
ChatGPT docs · read on 2026-08-30
✓CursorConnects
The endpoint answers an anonymous handshake, so no credential is needed.
{
"mcpServers": {
"vigil-an-outside-witness-for-ai-agents": {
"url": "https://vigilnotary.com/mcp"
}
}
}Cursor docs · read on 2026-08-30
✓VS Code (Copilot)Connects
The endpoint answers an anonymous handshake, so no credential is needed.
{
"servers": {
"vigil-an-outside-witness-for-ai-agents": {
"type": "http",
"url": "https://vigilnotary.com/mcp"
}
}
}VS Code (Copilot) docs · read on 2026-08-30
How to authenticate
Checked against the endpoint by our probe on 20 Oct 2026. These are the capabilities the server advertises, not a prediction about any particular client.
| Scheme | No auth |
|---|---|
| Protected-resource metadata | ✕Not found Without it a client has to guess where the authorization server lives. |
| Anonymous access | Handshake succeeds; 26 tools listable |
What the probe found
A cross-origin preflight came back without Access-Control-Allow-Origin, so the endpoint is reachable from native clients only — code running in a web page is stopped by the browser before a request is ever sent.
Tools
Contract history
Breaking: vigil_anchor, vigil_anchors, vigil_chain, vigil_delete_watchdog, vigil_get_receipt, vigil_grant_lease, vigil_heartbeat, vigil_info, vigil_journal_delete, vigil_journal_get, vigil_journal_list, vigil_journal_put, vigil_lease_status, vigil_leases, vigil_notarize, vigil_pricing, vigil_register, vigil_renew_lease, vigil_revoke_key, vigil_revoke_lease, vigil_set_watchdog, vigil_usage, vigil_verify_lease, vigil_verify_receipt, vigil_watchdog_status
Instructions rewritten: vigil_anchor, vigil_delete_watchdog, vigil_grant_lease, vigil_heartbeat, vigil_journal_delete, vigil_journal_put, vigil_notarize, vigil_register, vigil_renew_lease, vigil_revoke_key, vigil_revoke_lease, vigil_set_watchdog, vigil_verify_lease, vigil_verify_receipt, vigil_verify_source. The description an agent follows changed; the callable contract may not have.
Instructions rewritten: vigil_revoke_lease. The description an agent follows changed; the callable contract may not have.
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Status badge
Status for a README, from the last probe — cached an hour, so up to seven hours behind the endpoint. Links back to this page.
[](https://mcpi.app/servers/vigil-an-outside-witness-for-ai-agents)