Siril MCP Server
An MCP server that integrates with Siril astronomical image processing software to process Seestar telescope images, offering tools for binary detection, version checking, mosaic processing, and project analysis.
Caution. Specific findings reduced this grade. They are listed on the page. Grades reflect the full trust pyramid: code, verification depth, and reputation. New projects cap at C until adoption is earned.
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The grade above is for the source repository. Registries can serve a different version, so we mark the ones we were not able to read.
These names and descriptions are the publisher's own, read from the source code. We print them as written. Our assessment is the findings above, not this list.
check_siril_versionRuns 'siril --version' on the local machine and returns the version string.
find_siril_binaryLocates the Siril binary on your system and returns its path. This is useful for troubleshooting installation issues or confirming which version of Siril will be used.
validate_siril_binaryTests whether a specific Siril binary path works correctly. Useful for validating custom installations or non-standard locations.
process_seestar_mosaicRuns the appropriate Siril .ssf mosaic script on all FIT(S) in project_dir/lights, stacking them into a mosaic according to Seestar S30/S50 conventions.
preprocess_with_guiLaunches the full Naztronomy-Smart_Telescope_PP.py GUI in headless mode. (Requires sirilpy installed and a display server.)
download_latest_ssf_scriptsDownloads the latest SSF script files from the naztronaut/siril-scripts repository and saves them to your project directory. This ensures you have the most up-to-date versions of the Siril scripts.
check_project_structureChecks and displays the structure of a Seestar project directory, showing what files are present and what might be missing.
Disclosed vulnerabilities in this server's declared npm dependencies (via OSV). Whether each is reachable depends on the installed versions.
@modelcontextprotocol/sdk has cross-client data leak via shared server/transport instance reuse
Anthropic's MCP TypeScript SDK has a ReDoS vulnerability
Model Context Protocol (MCP) TypeScript SDK does not enable DNS rebinding protection by default
SIRIL_BINARY1. Custom Path: Set environment variable to specify a custom locationTool annotations
No tools have read-only/destructive annotations
Add readOnlyHint or destructiveHint annotations to every tool so hosts can warn users before invoking.
All four hints declared on every tool
7/7 tools missing one or more hints — check_siril_version (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); find_siril_binary (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); validate_siril_binary (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint), +4 more. OpenAI's directory rejects tools where any of the four hints are missing or non-boolean.
For every tool, set all four hints (readOnlyHint, destructiveHint, idempotentHint, openWorldHint) to explicit true/false values that match the handler’s actual behaviour.
Tool inputs are validated
5/7 tool handlers declare input schemas (71%)
Declare an inputSchema with zod/joi/yup on every tool definition.
Tool handlers catch errors
5/7 tool handlers wrap calls in try/catch (71%)
Wrap each tool handler body in try/catch and return a structured error response.
Tests exist
No test files found
Add tests that exercise each declared tool.
Production dependencies are patched
0 critical, 3 high severity in production deps — @modelcontextprotocol/sdk@1.17.0 (high), @modelcontextprotocol/sdk@1.17.0 (high)
Run npm audit fix, or upgrade the affected packages to a non-vulnerable version.
Tool description accuracy
preprocess_with_gui: description implies read-only but handler writes/deletes/executes
Update tool descriptions to accurately reflect all capabilities — especially write, delete, or execute operations.
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