LayerOne (DocX + Sign) runs on your own machine — the client starts it, so there is no endpoint to ping. 33 installs a week from npm. Last commit 18 Jun 2026.
MCP server for LayerOne DocX (documents & Factur-X) and Sign (e-signature) APIs.
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.
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 -- npx -y layerone-mcp
{
"mcpServers": {
"layerone": {
"args": [
"-y",
"layerone-mcp"
],
"command": "npx"
}
}
}
[mcp_servers.layerone]
command = "npx"
args = ["-y", "layerone-mcp"]
{
"mcpServers": {
"layerone": {
"args": [
"-y",
"layerone-mcp"
],
"command": "npx"
}
}
}
{
"mcpServers": {
"layerone": {
"args": [
"-y",
"layerone-mcp"
],
"command": "npx"
}
}
}
This one needs environment variables set before it will start:
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 declared them in the registry entry; get the values from the project itself.
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Answers built from our own checks of this server.