LayerOne (DocX + Sign) runs on your own machine — the client starts it, so there is no endpoint to ping. 34 installs a week from npm. Last commit 18 Jun 2026.
MCP server for LayerOne DocX (documents & Factur-X) and Sign (e-signature) APIs.
Nothing serious here today
Today is the operative word: we check LayerOne (DocX + Sign) every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.
Connect this server
This server runs on your own machine — install it with the package manager and the client starts it for you. Package name taken from the official registry entry.
claude mcp add layerone -e 'DOCX_API_KEY=<DOCX_API_KEY>' -e 'SIGN_API_KEY=<SIGN_API_KEY>' -- npx -y layerone-mcp{
"mcpServers": {
"layerone": {
"command": "npx",
"args": [
"-y",
"layerone-mcp"
],
"env": {
"DOCX_API_KEY": "<DOCX_API_KEY>",
"SIGN_API_KEY": "<SIGN_API_KEY>"
}
}
}
}[mcp_servers.layerone]
command = "npx"
args = ["-y", "layerone-mcp"]
env = { DOCX_API_KEY = "<DOCX_API_KEY>", SIGN_API_KEY = "<SIGN_API_KEY>" }{
"mcpServers": {
"layerone": {
"command": "npx",
"args": [
"-y",
"layerone-mcp"
],
"env": {
"DOCX_API_KEY": "<DOCX_API_KEY>",
"SIGN_API_KEY": "<SIGN_API_KEY>"
}
}
}
}{
"servers": {
"layerone": {
"type": "stdio",
"command": "npx",
"args": [
"-y",
"layerone-mcp"
],
"env": {
"DOCX_API_KEY": "<DOCX_API_KEY>",
"SIGN_API_KEY": "<SIGN_API_KEY>"
}
}
}
}Put your own values in place of
<DOCX_API_KEY> (DocX API key (documents, PDF, Factur-X). Generate at https://dev.layerone.fr), <SIGN_API_KEY> (Sign API key (eIDAS/PAdES e-signature). Generate at https://dev.layerone.fr).
The author’s registry entry marks them as required.
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LayerOne (DocX + Sign) — questions
Answers built from our own checks of this server.