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26.5.0

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@github-actions github-actions released this 28 May 21:42
26.5.0
e9a75bb

Initial public release of GroupDocs.Signature MCP Server

What changed

  • NuGet package GroupDocs.Signature.Mcp published with the McpServer package type.
  • Eight MCP tools exposed:
    • Sign — signs a document with a text, QR code, barcode, or digital certificate signature and saves the signed file as <name>_signed.<ext>.
    • Verify — verifies signatures (text / QR / barcode / digital / all) and returns a validity report as JSON.
    • SearchTextSignatures — finds embedded text signatures with an optional substring filter.
    • SearchBarcodes — finds barcode signatures (Code39, Code128, EAN, etc.) with an optional decoded-text filter; can return inline barcode images.
    • SearchQrCodes — finds QR code signatures with an optional decoded-text filter; can return inline QR images.
    • SearchDigitalSignatures — finds digital certificate signatures and returns signer, issuer, serial number, and validity status.
    • SearchImageSignatures — finds embedded image signatures (logos, stamps, picture overlays) and returns them as base64 PNGs.
    • GetDocumentInfo — returns file type, page count, size, and per-page dimensions as JSON; read-only.
  • The seven engine-touching tools (Sign, Verify, the five Search* tools) are ported from the GroupDocs.Signature framework subproject; a Pitfall #18 catch-and-format exception wrapper was added at clone time to each — engine failures surface as a descriptive "<Op> failed for '<file>': <type>: <msg>" string instead of MCP's opaque generic wrapper. GetDocumentInfo is added per Step 11 of the clone instructions; it serializes JSON directly (Pitfall #16) and uses reflection to extract PageCount/Pages across subtype-specific IDocumentInfo shapes.
  • Installable via dnx GroupDocs.Signature.Mcp@26.5.0 --yes (.NET 10 SDK required), dotnet tool install -g GroupDocs.Signature.Mcp, or Docker.
  • Docker image published to ghcr.io/groupdocs-signature/signature-net-mcp and docker.io/groupdocs/signature-net-mcp.
  • Environment variables: GROUPDOCS_MCP_STORAGE_PATH, optional GROUPDOCS_MCP_OUTPUT_PATH, GROUPDOCS_LICENSE_PATH.
  • Native dependencies on Linux: libgdiplus + libfontconfig1 + ttf-mscorefonts-installer (the engine rasterizes signature glyphs — text, QR codes, barcodes, certificate annotations — onto document pages, so MS core fonts are required for correct rendering). System.Drawing.EnableUnixSupport is set in the csproj. SkiaSharp.NativeAssets.Linux.NoDependencies is intentionally NOT pinned — neither the framework subproject nor the upstream engine declares a direct SkiaSharp dependency at clone time; revisit if a runtime libSkiaSharp.so not found surfaces on Linux integration runs.
  • The Pkcs CVE GHSA-555c-2p6r-68mm transitively pulled by GroupDocs.Signature (System.Security.Cryptography.Pkcs 7.0.0) is overridden by an explicit <PackageReference> to 9.0.0 in the csproj. Re-evaluate when the engine bumps its transitive.
  • License is applied via Pattern A (the cross-product License-class style): new GroupDocs.Signature.License().SetLicense(licensePath) (the framework's SignatureLicenseManager.cs uses this verbatim — no caveats observed in the engine).

Why

Exposes GroupDocs.Signature for .NET as AI-callable MCP tools for Claude, Cursor, VS Code / GitHub Copilot, and other MCP-compatible agents, so document signing, signature search, and verification can be invoked from natural-language instructions without bespoke per-agent integration.

Migration / impact

First release — no migration required.

Full Changelog: https://github.com/groupdocs-signature/GroupDocs.Signature.Mcp/commits/26.5.0

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