In-depth architectural comparison of the Depguard and Osv MCP servers. Compare execution transports, security boundaries, tool capabilities, quality scores, and ready-to-paste client installation snippets for Claude, Cursor, Windsurf, and VS Code.
At a Glance & Executive Verdict
Depguard
Security · Local stdio
Quality: 60/100 (Good) | Auth: No auth required
Osv
Security · Remote HTTP/SSE
Quality: 48/100 (Fair) | Auth: No auth required
Verdict Summary: Choose Depguard if you need specialized Security tools running via a local process. Choose Osv if your workspace requires Security integration with remote web transport. Both servers can be configured concurrently in your client's mcpServers manifest.
Which MCP Server Should You Choose?
Choose Depguard when:
You need dedicated capabilities in the Security domain.
You prefer local stdio subprocess transport architecture.
Your security boundary fits: No auth required (Free / Open Source).
Primary tools included: Pre-install package verification and typosquat detection, Static install-script and code-pattern analysis, Workspace, project, bulk, and transitive dependency audits.
Pre-install guardian for npm packages with static code analysis, supply-chain attack detection, vulnerability audit (npm + GitHub Advisory Database), AI hallucination guard, and CycloneDX 1.6 SBOM generation with VEX. 28 MCP tools. Zero runtime dependencies — the SBOM serializer is implemented natively against the public CycloneDX schema.
Depguard is categorized under Security and uses a local stdio subprocess. In contrast, Osv belongs to Security using remote streaming HTTP/SSE transport. Select Depguard when you need capabilities focused on security and Osv when you require tools for security.
Find all known vulnerabilities for an open-source package, optionally at a specific version, via the OSV.dev database. Omit version to get every vuln known for the package. Returns a compact summary array (id, summary, aliases, severity, references). Keyless.
get_vulnerability
Get full detail for a single vulnerability by its OSV ID — e.g. "GHSA-jf85-cpcp-j695", "CVE-2021-23337", "PYSEC-2021-XXX". Returns summary, details, aliases, severity, affected packages/ranges, and references. Keyless.
query_by_commit
Find vulnerabilities affecting a specific source-repository git commit via OSV.dev. Useful when you have a pinned commit hash rather than a released version. Returns the same compact vuln summary array. Keyless.
query_batch
Batch vulnerability query against OSV.dev (up to 1000 entries per call) — for SBOM-style "scan every dependency in this lockfile" workflows. Pass an array of {package:{name,ecosystem}, version?} or {commit} entries. Returns the vuln IDs matched per query (use get_vulnerability for full detail per I…