docgen-mcp-server

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Why docgen

An agent can write a perfect invoice's HTML, a clean data table, or a filled-form field map as tokens — but it cannot emit bytes. docgen is the renderer that closes the gap: structured content in, a downloadable binary document out. It wraps no external API; the "service" is a bundled rendering stack (pdf-lib for PDF and form fill, exceljs for spreadsheets, marked for the markdown path). Every output is stored tenant-scoped with a short TTL and handed back as a stable resource URI plus inline base64 when small enough.

Tools

Four tools sharing one delivery shape — three renderers that write a stored document and one read that re-fetches by id. Every render/export/fill call returns a DocumentEnvelope (a documentId, a docgen://document/{id} resource URI, byte size, TTL, and inline base64 when the artifact is small enough); docgen_get_document returns the same envelope for an id you already hold.

Tool	Description
docgen_render_pdf	Render HTML, markdown, or a {{key}} template + data object to a downloadable PDF.
docgen_export_spreadsheet	Render one or more named worksheets of row objects to a downloadable .xlsx workbook.
docgen_fill_form	Fill the AcroForm fields of a supplied PDF (base64 or https URL) and optionally flatten it.
docgen_get_document	Re-fetch a previously rendered document by the id a render/export/fill tool returned.

docgen_render_pdf

Render content to a downloadable PDF.

• Provide exactly one source: { html } (raw HTML you compose — the recommended path), { markdown } (converted to HTML, then rendered), or { template, data } (a {{key}} template filled from a data object, with server-owned layout)
• pageOptions control size (A4 / Letter / Legal / A3 / A5, default Letter), orientation, per-side margins (CSS lengths like "10mm", "0.5in", "72pt"), header/footer text (supporting the {{page}}, {{total}}, {{date}} tokens), and automatic page numbers
• The lightweight engine renders structured layout (headings, paragraphs, lists, tables) but not arbitrary CSS — a degraded enrichment flag is set when unsupported styling is dropped, so the agent isn't misled about fidelity
• Returns a DocumentEnvelope with pageCount

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docgen_export_spreadsheet

Render tabular data to an .xlsx workbook — the natural export stage for rows pulled from another server.