ltspice-mcp
Server Configuration
Describes the environment variables required to run the server.
| Name | Required | Description | Default |
|---|---|---|---|
| LTSPICE_BINARY | No | Path to the LTspice binary. | |
| LTSPICE_MCP_HOST | No | Host address for the MCP server. | |
| LTSPICE_MCP_PORT | No | Port number for the MCP server. | |
| LTSPICE_MCP_TIMEOUT | No | Timeout for LTspice operations. | |
| LTSPICE_MCP_WORKDIR | No | Working directory for LTspice MCP. | |
| LTSPICE_MCP_LOG_LEVEL | No | Logging level (e.g., DEBUG, INFO). | |
| LTSPICE_MCP_TRANSPORT | No | Transport mode (e.g., stdio, streamable-http). | |
| LTSPICE_MCP_UI_ENABLED | No | Enable UI integration (default 0). | |
| LTSPICE_MCP_TOOL_LOGGING | No | Enable tool-level logging. | |
| LTSPICE_MCP_JSON_RESPONSE | No | Enable JSON response mode. | |
| LTSPICE_MCP_DAEMON_LOG_DIR | No | Directory for daemon logs. | |
| LTSPICE_MCP_SCK_HELPER_DIR | No | Directory for ScreenCaptureKit helper. | |
| LTSPICE_MCP_STATELESS_HTTP | No | Enable stateless HTTP mode. | |
| LTSPICE_MCP_SCK_HELPER_PATH | No | Path to ScreenCaptureKit helper binary. | |
| LTSPICE_MCP_TOOL_LOG_MAX_CHARS | No | Maximum characters in tool log. | |
| LTSPICE_MCP_TOOL_LOG_MAX_ITEMS | No | Maximum items in tool log. | |
| LTSPICE_MCP_SCHEMATIC_LIVE_PATH | No | Path for live schematic updates. | |
| LTSPICE_MCP_VERIFY_WINDOW_CLOSE | No | Verify window close during operations. | |
| LTSPICE_MCP_STREAMABLE_HTTP_PATH | No | Path for streamable HTTP transport. | |
| LTSPICE_MCP_SCHEMATIC_SINGLE_WINDOW | No | Use single window for schematics. | |
| LTSPICE_MCP_DISABLE_UVICORN_NOISE_FILTERS | No | Disable uvicorn noise filters. |
Instructions
Guidance the server publishes about itself, which clients place ahead of the tool catalog so the model reads it before choosing anything.
This server publishes no instructions, or was last inspected before Glama recorded them.
Capabilities
Features and capabilities supported by this server
Protocol revision2025-11-25
| Capability | Details |
|---|---|
| tools | {
"listChanged": false
} |
| prompts | {
"listChanged": false
} |
| resources | {
"subscribe": false,
"listChanged": false
} |
| experimental | {} |
Tools
Functions exposed to the LLM to take actions
| Name | Description |
|---|---|
| readAgentGuideC | Read AGENT_README.md through MCP for interactive agent guidance.
|
| parseMeasResultsB | Parse LTspice .meas results from a run log or explicit log path. |
| runMeasAutomationC | Inject .meas directives into a netlist, run simulation, and parse measurement values. |
| runVerificationPlanB | Run simulation (or reuse a run) and evaluate assertion checks in one call. Assertion types:
|
| runSweepStudyC | Run stepped or Monte-Carlo parameter studies and return aggregate metrics. |
| generateVerifyAndCleanCircuitB | One-shot orchestration: create intent circuit, lint, simulate, verify, clean, and inspect. |
| autoCleanSchematicLayoutC | Auto-clean schematic layout and return before/after quality analysis. |
| inspectSchematicVisualQualityC | Inspect schematic visual quality and suggest coordinate-level fixes. |
| daemonDoctorC | Run a daemon/system health check and return actionable recommendations. |
| queueSimulationJobB | Queue a simulation job and return a job id for status polling/cancelation. |
| listJobsC | List queued/running/completed simulation jobs. |
| jobStatusC | Get status for one queued/running/completed simulation job. |
| cancelJobC | Request cancellation for a queued/running job. |
| listJobHistoryB | List archived (terminal) queue jobs retained across daemon restarts. |
| getLtspiceStatusA | Get LTspice executable status and server configuration. |
| getLtspiceUiStatusA | Return whether LTspice UI appears to be running on this machine. |
| getLtspiceLibraryStatusC | Get LTspice symbol library ZIP status and basic counts. |
| listLtspiceLibraryEntriesC | List LTspice symbol ZIP entries (.asy), optionally filtered by query. |
| listLtspiceSymbolsC | List/search LTspice symbols parsed from the symbol library ZIP. |
| getLtspiceSymbolInfoC | Get pin map and metadata for a symbol in LTspice's lib.zip. |
| renderLtspiceSymbolImageC | Render an LTspice symbol to an image and return the image through MCP. The response includes both image content and structured metadata (image_path, bounds, etc.). |
| renderLtspiceSchematicImageC | Render an LTspice schematic (.asc) to an image and return it through MCP.
|
| renderLtspicePlotImageB | Render one or more vectors from a RAW dataset to a plot image and return it through MCP. Supports run_id/raw_path resolution and optional step filtering for stepped runs. pane_layout: single | split | per_trace |
| generatePlotSettingsC | Generate a LTspice .plt file from vectors and return parsed settings for debugging. |
| listPlotPresetsA | List built-in deterministic LTspice plot presets. |
| generatePlotPresetSettingsB | Generate deterministic .plt settings for a named preset. |
| renderLtspicePlotPresetImageC | Render a plot image using a built-in deterministic preset. |
| setLtspiceUiEnabledA | Set default UI behavior for simulation calls where show_ui is omitted. |
| setSchematicUiSingleWindowC | Set whether schematic UI opens reuse a single live schematic path. |
| closeLtspiceWindowA | Close LTspice windows whose title contains title_hint. |
| startLtspiceRenderSessionC | Open an LTspice window once for repeated image rendering. |
| endLtspiceRenderSessionC | Close the LTspice window associated with a render session. |
| openLtspiceUiA | Open LTspice UI on a selected artifact. If
|
| readLtspiceUiTextA | Read visible LTspice window text using macOS Accessibility APIs. Use this to compare parser outputs against text displayed in LTspice UI (for example values shown in log windows). |
| createSchematicC | Create an LTspice .asc schematic from structured component/wire/directive data. Components must include: symbol, reference, x, y. Optional component fields: value, orientation|rotation, attributes, pin_nets. |
| createSchematicFromNetlistB | Create an LTspice .asc schematic from a SPICE netlist using auto-placement/routing. Supports common two-pin primitives (R, C, L, D, V, I) plus multi-pin active elements such as X-subcircuits, BJTs (Q), and MOSFETs (M) when symbols can be resolved. |
| listSchematicTemplatesA | List available schematic templates from the built-in or user-provided JSON file. |
| createSchematicFromTemplateB | Create an LTspice .asc schematic from a JSON template. Templates support type=netlist (auto-layout) and type=spec (explicit placement). |
| listIntentCircuitTemplatesB | List high-level circuit intent templates and default parameters. |
| createIntentCircuitB | Create a circuit from high-level intent templates (filters, amplifier, regulator). Returns schematic and sidecar netlist paths, and optionally validation payload. |
| syncSchematicFromNetlistFileA | Regenerate schematic from a netlist file only when source content changed. Stores sync metadata in JSON so repeated calls are fast and deterministic. |
| watchSchematicFromNetlistFileB | Poll a netlist file and regenerate schematic whenever the netlist changes. Returns update events for each rebuild detected during the watch interval. |
| loadCircuitC | Create a netlist file in the MCP workdir and mark it as the currently loaded circuit. |
| loadNetlistFromFileC | Load an existing netlist file (.cir/.net/.sp/.spi/.sub/.lib/.txt) as the current circuit. |
| runSimulationA | Run LTspice in batch mode for the currently loaded netlist. The ngspice-style |
| simulateNetlistC | Write a netlist and run LTspice batch simulation in one call. |
| simulateNetlistFileC | Run LTspice batch simulation for an existing netlist path. |
| validateSchematicB | Validate a schematic (.asc) for simulation readiness. Checks for components, ground flag, and simulation directives in TEXT commands. |
| lintSchematicC | Run structural lint checks on a schematic, including pin connectivity and dangling wires. |
| simulateSchematicFileC | Run LTspice batch simulation for an existing schematic (.asc) file. Optional preflight validation is included to help agents debug schematics before simulation. |
| resolveSchematicSimulationTargetB | Resolve which file simulateSchematicFile will execute and explain sidecar requirements. |
| scanModelIssuesC | Scan LTspice log text for missing model/include/subcircuit issues. |
| importModelFileC | Import a model file into the MCP workdir for reproducible .include usage. |
| patchNetlistModelBindingsC | Patch netlist model bindings by adding includes and remapping model/subckt names. |
| autoDebugSchematicB | Iteratively validate, simulate, and apply targeted fixes to a schematic until it runs or stalls. |
| getToolTelemetryC | Return rolling performance telemetry for MCP tools. |
| resetToolTelemetryA | Reset rolling performance telemetry for one tool or all tools. |
| tailDaemonLogC | Return tail text from the active daemon log file. |
| getRecentErrorsC | Scan recent daemon logs and return structured error entries. |
| getCaptureHealthC | Summarize ScreenCapture/LTspice capture health from in-process capture events. |
| listRunsA | List recent simulation runs (newest first). |
| getRunDetailsB | Get full details for a run_id, or the latest run if omitted. |
| getPlotNamesA | List LTspice plot names available in one RAW file or all RAW files from a run. |
| getVectorsInfoC | Get detailed information about vectors in a plot. |
| getVectorDataC | Get data for vectors, optionally interpolated at explicit scale points. |
| getLocalExtremaC | Get local minima/maxima for vectors. |
| getBandwidthC | Compute -drop_db bandwidth for an AC response vector. |
| getGainPhaseMarginC | Compute gain and phase margins from an AC loop-gain vector. |
| getRiseFallTimeC | Compute first rise/fall times for a transient response. |
| getSettlingTimeC | Compute settling time to a target within tolerance_percent band. |
| validateLtspiceMeasurementsB | Validate parsed metric endpoints against LTspice-native This reruns the source netlist with generated measurement directives and compares LTspice's own reported values to the server's computed metrics. |
Prompts
Interactive templates invoked by user choice
| Name | Description |
|---|---|
No prompts | |
Resources
Contextual data attached and managed by the client
| Name | Description |
|---|---|
| agent_readme | Agent-focused operational guide for this MCP server. |
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