{"command":"npx","args":["-y","https://mcp.vespper.com/mcp"]}

config / sealed 2026-07-19 / No. 6c3fb8c6

Does {"command":"npx","args":["-y","https://mcp.vespper.com/mcp"]} MCP work in Claude Code and Cursor? Throne executed {"command":"npx","args":["-y","https://mcp.vespper.com/mcp"]} mcp in a single-use Firecracker microVM and replayed both recorded client behaviours. Compatibility verdict: inconclusive. Is {"command":"npx","args":["-y","https://mcp.vespper.com/mcp"]} mcp safe? Static security scan: not run (the server did not launch far enough to scan). The full per-step results, security findings, scan date, and evidence hash are below.

re-scan this server gate it in your CI

> throne registry {"command":"npx","args":["-y","https://mcp.vespper.com/mcp"]} sealed

This target couldn't be started as an MCP servernever completed an MCP handshake, this target may not be an MCP server, or may need a manual build / non-Node runtime

receiptsealed evidence

scan id: 6c3fb8c66692427eb02ac148005407bb
target: {"command":"npx","args":["-y","https://mcp.vespper.com/mcp"]}
sealed at: 2026-07-19 10:42:04Z
evidence hash: sha256:8f835e54a7d5fd63dde80318aebb3c204291d6aae6f8b548d9be72c0a175ae4d

01connectFAIL1.5s

RuntimeError: connect failed: McpError: Connection closed

02discoverSKIPPED0ms

not run, connect failed

03validate_schemasSKIPPED0ms

not run, connect failed

04smoke_test_toolsSKIPPED0ms

not run, connect failed

05error_handlingSKIPPED0ms

not run, connect failed

06streamingSKIPPED0ms

not run, connect failed

07resource_lifecycleSKIPPED0ms

not run, connect failed

08concurrent_callsSKIPPED0ms

not run, connect failed

09reconnectSKIPPED0ms

not run, connect failed

01connectFAIL759ms

RuntimeError: connect failed: McpError: Connection closed

02discoverSKIPPED0ms

not run, connect failed

03validate_schemasSKIPPED0ms

not run, connect failed

04smoke_test_toolsSKIPPED0ms

not run, connect failed

05error_handlingSKIPPED0ms

not run, connect failed

06streamingSKIPPED0ms

not run, connect failed

07resource_lifecycleSKIPPED0ms

not run, connect failed

08concurrent_callsSKIPPED0ms

not run, connect failed

09reconnectSKIPPED0ms

not run, connect failed

chatgpt desktop calibratingemulation profile pending real-traffic captureCOMING SOON

SECURITY: NOT RUN

VERDICT: INCONCLUSIVESANDBOXED RUN, submitted server executed in a disposable microVM, compatibility not assessable: the server process ran but never completed an MCP handshake, this target may not be an MCP server, or may need a manual build / non-Node runtime / security scan skippedsealed by THRONE / No. 6c3fb8c6 / 2026-07-19

scopeattestation tuple

target: {"command":"npx","args":["-y","https://mcp.vespper.com/mcp"]} config
engine: sandboxed
claude code: calibration: partial recorded=9,spec=0,assumed=9
cursor: calibration: partial recorded=11,spec=0,assumed=7
chatgpt desktop: calibration: unavailable recorded=0,spec=2,assumed=16
steps exercised: 18 of 18
test suite: v1.0.0
security ruleset: v1.0.0
sealed at: 2026-07-19 10:42:04Z
evidence hash: sha256:8f835e54a7d5fd63dde80318aebb3c204291d6aae6f8b548d9be72c0a175ae4d
valid until: 2026-10-17

executed in a disposable microVM, created for this scan and destroyed after it. nothing outlives a run.

maintainer of this server? challenge this record: hello@usethrone.dev. tell us what we got wrong and we re-run it in the open.

this page renders the stored record of a real run. nothing on it is asserted without the execution that proved it.