flatmark

flatmark

Document to Markdown API and MCP server for PDF, Word, PowerPoint, Excel and HTML. OCR queue for large files. Hosted in Germany.

flatmark converts PDF, Word, PowerPoint, Excel and HTML to Markdown over a REST API and an MCP server. Files up to 8 MB convert in one call with MarkItDown. Files up to 25 MB and 200 pages go through a queue that runs Docling with OCR and table detection. The queue returns Markdown and a JSON structure file, by polling or a signed webhook. The servers are in Germany. The free plan has 100 credits a month and needs no card.

Quickstart

Convert a PDF to Markdown in one call. The anonymous tier needs no key; add -H "X-API-Key: $FLATMARK_API_KEY" for your plan's limits.

curl -sO https://flatmark.dev/app-static/samples/sample.pdf
curl -F file=@sample.pdf https://api.flatmark.dev/v1/convert

{"markdown":"Hello Docling smoke test\n\n","meta":{"filename":"sample.pdf"}}

Files over 8 MB and scanned documents go through the OCR queue instead: POST /v1/convert/jobs, then poll or receive a signed webhook.

Use it from

MCP server

Streamable-HTTP endpoint: https://api.flatmark.dev/mcp/ — the anonymous tier works without a key; an API key raises the limits.

Claude Code:

claude mcp add --transport http flatmark https://api.flatmark.dev/mcp/

Claude Code: /plugin marketplace add flatmark-dev/flatmark then /plugin install flatmark@flatmark (set FLATMARK_API_KEY for your key).

Cursor / Windsurf / Cline / Claude Desktop:

{
  "mcpServers": {
    "flatmark": {
      "url": "https://api.flatmark.dev/mcp/"
    }
  }
}

One-click installs for every client: https://flatmark.dev/connect

Integrations (n8n, Zapier, Make, Dify, SDKs and templates): https://github.com/flatmark-dev/flatmark-integrations

Templates

Ready-made workflows: https://flatmark.dev/templates

Links

• Website: https://flatmark.dev/go/github
• API docs: https://api.flatmark.dev/docs · OpenAPI
• Pricing: https://flatmark.dev/pricing
• Convert a PDF free: https://flatmark.dev/tools/pdf-to-markdown
• llms.txt: https://flatmark.dev/llms.txt
• Privacy policy: https://flatmark.dev/privacy
• Support: https://flatmark.dev/support

API

Base URL https://api.flatmark.dev/ — authenticate with an X-API-Key header; anonymous calls work at a lower rate limit.

About the files here

• .claude-plugin/ — Claude Code plugin, with this repo as its own marketplace.
• .mcp.json — the MCP server the Claude Code plugin connects to.
• gemini-extension.json — Gemini CLI extension manifest.
• glama.json — Glama server claim (names the maintainer).
• mcp.json — Agent Plugins 1.0 MCP server config.
• plugin.json — Agent Plugins 1.0 plugin manifest.
• server.json — the entry in the official MCP Registry.
• skills/ — an Agent Skill (agentskills.io SKILL.md) for skill galleries.