registry / record

@jetbrains/mcp-proxy

npm / sealed 2026-06-16 / No. 74de5d64

Does @jetbrains/mcp-proxy MCP work in Claude Code and Cursor? Throne executed @jetbrains/mcp-proxy mcp in a single-use Firecracker microVM and replayed both recorded client behaviours. Compatibility verdict: needs a live backend. Is @jetbrains/mcp-proxy 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 @jetbrains/mcp-proxy sealed

This server runs and speaks MCP. It waits on a companion service the sandbox does not havethe server launches and speaks MCP, but refuses every request without its companion service, MCP error -32603: No working IDE endpoint available.

receiptsealed evidence

scan id: 74de5d64c0554ea5ac94635f5d9681c7
target: @jetbrains/mcp-proxy
sealed at: 2026-06-16 17:41:13Z
evidence hash: sha256:6f908765428d6f4154c041cfeb3ceb230107cc3080fb4137cc2897c0ad090957

01connectPASS1.0s

initialize ok: server jetbrains/proxy 0.1.0, negotiated protocolVersion 2024-11-05, capabilities ['resources', 'tools']

02discoverWARN4ms

server answered with a structured error instead of completing the step, MCP error -32603: No working IDE endpoint available.

03validate_schemasWARN2ms

server answered with a structured error instead of completing the step, MCP error -32603: No working IDE endpoint available.

04smoke_test_toolsWARN2ms

server answered with a structured error instead of completing the step, MCP error -32603: No working IDE endpoint available.

05error_handlingWARN2ms

server answered with a structured error instead of completing the step, MCP error -32603: No working IDE endpoint available.

06streamingWARN2ms

server answered with a structured error instead of completing the step, MCP error -32603: No working IDE endpoint available.

07resource_lifecycleNOT_APPLICABLE2ms

resources capability not declared

08concurrent_callsWARN2ms

server answered with a structured error instead of completing the step, MCP error -32603: No working IDE endpoint available.

09reconnectPASS4.1s

transport closed and relaunched; re-handshake ok (protocolVersion 2024-11-05, first session was 2024-11-05)

01connectPASS4.5s

initialize ok: server jetbrains/proxy 0.1.0, negotiated protocolVersion 2024-11-05, capabilities ['resources', 'tools'] [request_strategy=pipelined, connection_count=2, second connection established]

02discoverWARN20ms

server answered with a structured error instead of completing the step, MCP error -32603: No working IDE endpoint available.

03validate_schemasWARN4ms

server answered with a structured error instead of completing the step, MCP error -32603: No working IDE endpoint available.

04smoke_test_toolsWARN2ms

server answered with a structured error instead of completing the step, MCP error -32603: No working IDE endpoint available.

05error_handlingWARN1ms

server answered with a structured error instead of completing the step, MCP error -32603: No working IDE endpoint available.

06streamingWARN1ms

server answered with a structured error instead of completing the step, MCP error -32603: No working IDE endpoint available.

07resource_lifecycleNOT_APPLICABLE16ms

resources capability not declared

08concurrent_callsWARN4ms

server answered with a structured error instead of completing the step, MCP error -32603: No working IDE endpoint available.

09reconnectPASS7.6s

transport closed and relaunched; re-handshake ok (protocolVersion 2024-11-05, first session was 2024-11-05)

chatgpt desktop calibratingemulation profile pending real-traffic captureCOMING SOON

No findings under security ruleset v1

VERDICT: NEEDS A LIVE BACKENDSANDBOXED RUN, submitted server executed in a disposable microVM, compatibility not assessable: needs a live environment: the server launches and speaks MCP, but refuses every request without its companion service, MCP error -32603: No working IDE endpoint available. / security: clean, 0 findingssealed by THRONE / No. 74de5d64 / 2026-06-16

scopeattestation tuple

target: @jetbrains/mcp-proxy 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: 16 of 18
test suite: v1.0.0
security ruleset: v1.0.0
sealed at: 2026-06-16 17:41:13Z
evidence hash: sha256:6f908765428d6f4154c041cfeb3ceb230107cc3080fb4137cc2897c0ad090957
valid until: 2026-09-14

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.