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mcp-server-time

uvx / sealed 2026-06-16 / No. 72090253

Does mcp-server-time MCP work in Claude Code and Cursor? Throne executed mcp-server-time mcp in a single-use Firecracker microVM and replayed both recorded client behaviours. Compatibility verdict: fit. Is mcp-server-time 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.

> throne registry mcp-server-time sealed
receiptsealed evidence
scan id
720902538d7b48d3962c01f65d698ec3
target
uvx mcp-server-time
sealed at
2026-06-16 19:26:01Z
evidence hash
sha256:d2a571029a2c5ae5143ad9248d5dc66b6538f2627bed1fc6fb95b68b8f5b2a3e
01connectPASS802ms

initialize ok: server mcp-time 1.27.2, negotiated protocolVersion 2025-11-25, capabilities ['experimental', 'tools']

02discoverPASS8ms

supported: tools/list (2 tools); method not found (tolerated): resources/list, prompts/list

03validate_schemasPASS4ms

all 2 tool inputSchemas are valid JSON Schema

04smoke_test_toolsPASS14ms

called 2 of 2 tools (cap 10, strategy=serial): 0 ok, 2 returned tool-level errors (expected for synthesized args)

05error_handlingPASS5.1s

structured error responses, connection survived, wrong_type_args: get_current_time:accepted (returned result); convert_time:accepted (returned result); unknown_method: error(-32602); invalid_id: no response (silent), connection alive; oversized_input: accepted (returned result); recovery: accepted (returned result); cancellation: accepted (returned result); old_version: accepted old version 2024-10-07, negotiated 2025-11-25, server may have stale protocol handling

06streamingNOT_APPLICABLE0ms

no streaming-capable tool declared by this server

07resource_lifecycleNOT_APPLICABLE3ms

resources capability not declared

08concurrent_callsWARN5ms

ladder 1 overlapping get_current_time calls: max_observed_stable_concurrency=1; all ids answered exactly once, but every call returned an error (tool-level isError result), the tool may need runtime dependencies this sandbox does not provide

09reconnectPASS961ms

transport closed and relaunched; re-handshake ok (protocolVersion 2025-11-25, first session was 2025-11-25)

01connectPASS1.7s

initialize ok: server mcp-time 1.27.2, negotiated protocolVersion 2025-11-25, capabilities ['experimental', 'tools'] [request_strategy=pipelined, connection_count=2, second connection established]

02discoverPASS10ms

supported: tools/list (2 tools); method not found (tolerated): resources/list, prompts/list; notes: connection 2 confirms 2 tools

03validate_schemasPASS5ms

all 2 tool inputSchemas are valid JSON Schema

04smoke_test_toolsPASS17ms

called 2 of 2 tools (cap 10, strategy=pipelined): 0 ok, 2 returned tool-level errors (expected for synthesized args)

05error_handlingPASS5.1s

structured error responses, connection survived, wrong_type_args: get_current_time:accepted (returned result); convert_time:accepted (returned result); unknown_method: error(-32602); invalid_id: no response (silent), connection alive; oversized_input: accepted (returned result); recovery: accepted (returned result); cancellation: accepted (returned result); old_version: accepted old version 2024-10-07, negotiated 2025-11-25, server may have stale protocol handling

06streamingNOT_APPLICABLE0ms

no streaming-capable tool declared by this server

07resource_lifecycleNOT_APPLICABLE3ms

resources capability not declared

08concurrent_callsWARN42ms

ladder 1/2/4/6 overlapping get_current_time calls: max_observed_stable_concurrency=6; all ids answered exactly once, but every call returned an error (tool-level isError result), the tool may need runtime dependencies this sandbox does not provide

09reconnectPASS1.8s

transport closed and relaunched; re-handshake ok (protocolVersion 2025-11-25, first session was 2025-11-25)

chatgpt desktop calibratingemulation profile pending real-traffic captureCOMING SOON
No findings under security ruleset v1
VERDICT: FIT14 of 18 steps exercised across 2 clientsSANDBOXED RUN, submitted server executed in a disposable microVM, compatibility: 0 fail / 2 warn (14 of 18 steps exercised across 2 clients) / security: clean, 0 findingssealed by THRONE / No. 72090253 / 2026-06-16
scopeattestation tuple
target
uvx mcp-server-time pypi
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
14 of 18
test suite
v1.0.0
security ruleset
v1.0.0
sealed at
2026-06-16 19:26:01Z
evidence hash
sha256:d2a571029a2c5ae5143ad9248d5dc66b6538f2627bed1fc6fb95b68b8f5b2a3e
valid until
2026-09-14
THRONE: FITwear the crown

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[![THRONE: FIT](https://api.usethrone.dev/api/badge/uvx%20mcp-server-time)](https://usethrone.dev/server/mcp-server-time)
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.

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