registry / record

a

npm / sealed 2026-06-20 / No. 923f9e33

Does a MCP work in Claude Code and Cursor? Throne executed a mcp in a single-use Firecracker microVM and replayed both recorded client behaviours. Compatibility verdict: inconclusive. Is a mcp safe? Static security scan: no findings under security ruleset v1. 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 a sealed

This target couldn't be started as an MCP serverserver process exited with code 1 before the MCP handshake, stderr: npm error could not determine executable to run npm error A complete log of this run can be found in: /home/worker/.npm/_logs/2026-06-20T09_01_59_904Z-debug-0.log

receiptsealed evidence

scan id: 923f9e33e69a40efbc69fccc24b3f63c
target: a
sealed at: 2026-06-20 09:02:02Z
evidence hash: sha256:95e22dea295b44efb9910036724a3ca17f1b926c41c212f496e7ee17c50b8c0c

01connectFAIL0ms

server never launched: server process exited with code 1 before the MCP handshake, stderr: npm error could not determine executable to run npm error A complete log of this run can be found in: /home/worker/.npm/_logs/2026-06-20T09_01_59_904Z-debug-0.log

02discoverSKIPPED0ms

not run, server never launched

03validate_schemasSKIPPED0ms

not run, server never launched

04smoke_test_toolsSKIPPED0ms

not run, server never launched

05error_handlingSKIPPED0ms

not run, server never launched

06streamingSKIPPED0ms

not run, server never launched

07resource_lifecycleSKIPPED0ms

not run, server never launched

08concurrent_callsSKIPPED0ms

not run, server never launched

09reconnectSKIPPED0ms

not run, server never launched

01connectFAIL0ms

server never launched: server process exited with code 1 before the MCP handshake, stderr: npm error could not determine executable to run npm error A complete log of this run can be found in: /home/worker/.npm/_logs/2026-06-20T09_01_59_904Z-debug-0.log

02discoverSKIPPED0ms

not run, server never launched

03validate_schemasSKIPPED0ms

not run, server never launched

04smoke_test_toolsSKIPPED0ms

not run, server never launched

05error_handlingSKIPPED0ms

not run, server never launched

06streamingSKIPPED0ms

not run, server never launched

07resource_lifecycleSKIPPED0ms

not run, server never launched

08concurrent_callsSKIPPED0ms

not run, server never launched

09reconnectSKIPPED0ms

not run, server never launched

chatgpt desktop calibratingemulation profile pending real-traffic captureCOMING SOON

No findings under security ruleset v1

VERDICT: INCONCLUSIVESANDBOXED RUN, submitted server executed in a disposable microVM, compatibility not assessable: server never launched: server process exited with code 1 before the MCP handshake, stderr: npm error could not determine executable to run npm error A complete log of this run can be found in: /home/worker/.npm/_logs/2026-06-20T09_01_59_904Z-debug-0.log / security: clean, 0 findingssealed by THRONE / No. 923f9e33 / 2026-06-20

scopeattestation tuple

target: a npm
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: 2026-06-20 09:02:02Z
evidence hash: sha256:95e22dea295b44efb9910036724a3ca17f1b926c41c212f496e7ee17c50b8c0c
valid until: 2026-09-18

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.