pyHanko is named in the request, and its own product page (Pyhanko, source 1) is the primary answer; its page was not read, so its description rests on the indexed actions for digital-signature, signature and pdf. Alternatives that also sign or verify PDFs digitally are Aspose (sign_document, get_digital_signatures), Dokmatiq (sign_pdf, verify_pdf_signatures) and Casual Office (sign_pdf, verify_signatures), while Cryptography 6 supplies the underlying primitives rather than a PDF signing tool.
- 1
pyHankopyhanko.euverified and signed
Python library and command-line tool for digitally signing and validating PDF documents, indexed under the digital-signature, signature and pdf actions.
+1 community tools built for it
for agents: digital-signature · signature · pdf
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Aspose.PDFaspose.comfound in code, not yet checked
File format SDK whose sign_document action signs a document with a digital certificate and whose get_digital_signatures action reads signature metadata.
for agents: get_digital_signatures · sign_document · PDF
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Sources
- 3File Format SDKs for Word Excel PDF Email PowerPoint Barcode Images OCR Note and 3Daspose.com · read 2026-10-29
- 6Welcome to pyca/cryptography — Cryptography 51.0.0-dev1 documentationcryptography.io · read 2026-10-29
- 9Dokmatiq | Document Automation API aus Deutschlanddokmatiq.com · read 2026-10-30
For agents: the 10 actions behind this answer
digital-signature · pyHanko verified and signed
· FreeSign website read, tools not yet checked
Free e-signature — sign a PDF in the browser, no account. FreeSign is a free in-browser e-signature that never uploads your PDF. We hash it locally, capture signer intent with OTP evidence, seal it with a per-user certificate, and add an independent OpenTimestamps proof. Standard PAdES signature, ve
get_digital_signatures · Aspose.Words MCP found in code, not yet checked
Get document digital signature metadata
· SignDocs website read, tools not yet checked
create-plan · create-plan verified and signed
Create a new plan file in .agents/plans/
· Cryptography website read, tools not yet checked
create_document · claude-opensign-integration found in code, not yet checked
Generate a new document and send it for signing by providing base64 encoded file
document_signer · Nutrient DWS MCP Server found in code, not yet checked
Digitally sign PDF files using the Nutrient Sign API. Reads input files from the local file system or sandbox (if enabled) and writes signed output back locally. Signature types: • CMS/PKCS#7 (standard digital signatures) • CAdES (advanced electronic signatures) Appearance options: • Visible or invi
sign_pdf · Dokmatiq DocGen found in code, not yet checked
Digitally sign a PDF with a PKCS#12 certificate.
sign_pdf · pdf found in code, not yet checked
Digitally sign a PDF (PKCS#7, incremental update — original bytes preserved). Provide a PKCS#12 (.p12/.pfx) identity + passphrase for a real cert; omit them to mint a throwaway self-signed identity. Writes a new file.
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