Siglio MCP runs on your own machine — the client starts it, so there is no endpoint to ping. 104 installs a week from npm.
MCP server for Siglio. Lets an AI assistant send documents for e-signature by email or text.
Nothing serious here today
Today is the operative word: we check Siglio MCP 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 siglio-mcp -e 'SIGLIO_API_KEY=<SIGLIO_API_KEY>' -- npx -y siglio-mcp{
"mcpServers": {
"siglio-mcp": {
"command": "npx",
"args": [
"-y",
"siglio-mcp"
],
"env": {
"SIGLIO_API_KEY": "<SIGLIO_API_KEY>"
}
}
}
}[mcp_servers.siglio-mcp]
command = "npx"
args = ["-y", "siglio-mcp"]
env = { SIGLIO_API_KEY = "<SIGLIO_API_KEY>" }{
"mcpServers": {
"siglio-mcp": {
"command": "npx",
"args": [
"-y",
"siglio-mcp"
],
"env": {
"SIGLIO_API_KEY": "<SIGLIO_API_KEY>"
}
}
}
}{
"servers": {
"siglio-mcp": {
"type": "stdio",
"command": "npx",
"args": [
"-y",
"siglio-mcp"
],
"env": {
"SIGLIO_API_KEY": "<SIGLIO_API_KEY>"
}
}
}
}Put your own value in place of
<SIGLIO_API_KEY> (Your Siglio API key. Sandbox keys start with sig_sandbox_ and live keys start with sig_live_. Get one at https://esigndev.com).
The author’s registry entry marks it as required.
Optional settings from the registry entry, left out of the block above:
SIGLIO_ALLOW_LIVE (Set to true to allow a live key. Without it, live keys are refused and only sandbox keys will run. Leave unset while testing).
Alternatives to Siglio MCP
same job, measured the same wayMCP server for Resend — transactional email API for AI assistants...
IMAP/SMTP MCP server to search, read, organize, send, reply & forward email for AI assistants
Send PDFs for e-signature by email and SMS code. Check signing status. No document storage.
Secure MCP server for exploring incwo CRM data, documents, and email workflows.
Microsoft Outlook MCP server — 22 tools for email, calendar, contacts, and mailbox management.
MCP server exposing cPanel UAPI (domains, DNS, email, MySQL, files) as tools for AI assistants.
Website analytics (Umami) and email (Resend) for an AI assistant, as one MCP bundle.
Email infrastructure for AI agents — send, receive, search, and reply to email over MCP.
Siglio MCP — questions
Answers built from our own checks of this server.