Siglio MCP server
com.esigndev/siglio-mcp·v1.1.0MCP server for Siglio. Lets an AI assistant send documents for e-signature by email or text.
251 downloads/wk
Reviews
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If you have run it, two minutes of your experience saves the next person an afternoon.
Siglio tools (5, 2 write)
write = sends, deletes, buys or postsRead from the package source without running it. The installed server may list more.
check_envelopeReturns the current state of an envelope: whether it was delivered, opened, signed, or cancelled,
download_attachmentSaves one file the signer uploaded (a photo ID, a W-9) to this machine. Get the file id from
download_signed_documentSaves the completed, signed PDF to this machine. Only works once every signature is in; an envelope
send_for_signaturewrite actionSends a PDF to one or two people for electronic signature, by email, text message, or both at once.
void_envelopewrite actionCancels an envelope that has not been signed yet. The signing link stops working immediately and the
Public scan report
scanner v0.1.10 · 2026-10-03 · same rubric, same numbers if you re-run it
- Code scan2 source files scanned25/25
- –Live reliabilityno gateway calls yet and no remote to proben/a
- –Tool poisoningtools not inspected (local package is not executed); not countedn/a
- Auth qualitystatic API keys via environment variables6/15
- Maintenanceno repository listed3/15
- Maintainer identityno repository or website to verify2/10
Findings (1)
- lowNo source repository listed
maint.no-repo
How Siglio compares
Against every graded Email MCP server, from our own scans and uptime checks. Updated after each scan run.
- Safety score
- 55/100
- higher than 10% of 916 Email servers
- Tools
- 5
- the typical Email server has 7
- Tools that change things
- 40%
- typical: 25%. Fewer write tools means less an agent can break
- Downloads a week
- 251
- more than 74% of 235 Email servers with a package
What its tools let an agent do: 3 read · 1 change · 1 send or post
Release history: 3 versions in the registry since 2026-09-15, latest 2026-10-01, typically one every 8 days.
Install Siglio in Claude Code, Cursor or VS Code
Runs npx -y siglio-mcp on your machine. Read the scan report first; the gateway never runs local packages.
claude mcp add siglio-mcp -- npx -y siglio-mcp
Siglio: common questions
- Is Siglio MCP server safe?
- With care: it is graded C, so read the findings first (55/100). Read the Siglio safety report
- How do I install Siglio?
- It runs on your machine. Copy the Claude Code, Cursor, VS Code or Claude Desktop config from the install section.
- Does Siglio need an API key?
- Yes. The registry entry asks for
SIGLIO_API_KEY. - Is Siglio maintained?
- The latest release is v1.1.0.
- What can I use instead of Siglio?
- Servers from other publishers that do the same job: Agenticmail MCP server, Imap MCP server and Openagentemail MCP server.
- How does Siglio compare with other Email MCP servers?
- safety score 55/100 (higher than 10% of 916 Email servers); tools 5 (the typical Email server has 7); tools that change things 40% (typical: 25%. Fewer write tools means less an agent can break). Full comparison.
Alternatives to Siglio
Same job from other publishers: the closest match first, then the best rated.
- AgenticmailReal email and SMS for AI agents — send mail, receive verification codes, drive a real inbox.not reviewedEstablishedB
- ImapIMAP/SMTP MCP server to search, read, organize, send, reply & forward email for AI assistantsnot reviewedEstablishedA
- OpenagentemailUnlimited agent mailboxes — create identities, read/wait for mail, extract OTPs, send email.not reviewedGrowingB
- FluxmailRead, search, draft, send, and organize email through Gmail, Outlook, and IMAP/SMTP mailboxes.not reviewedGrowingB
MCPEmailsNever-stored live email: read, send and triage Gmail, Outlook / Microsoft 365, or any IMAP mailbox.not reviewedGrowingA
