The SignatureAPI MCP server,
connected in one click.
E-signature API: send documents for signature, track envelopes, get signed files. Connect the official SignatureAPI MCP server to Claude, ChatGPT, or Cursor through gate — one gateway URL, no config files, security-checked.
Free to start · No credit card · No hosting needed
Add SignatureAPI to your AI in one minute
Pick your client. Copy, paste, done — or let gate handle sign-ins and policies for you.
claude mcp add --transport http signatureapi https://mcp.signatureapi.com/mcpRun in your terminal, then restart Claude Code. The client will open the vendor's sign-in the first time you use it.
SignatureAPI · https://mcp.signatureapi.com/mcp
What your AI can do with SignatureAPI
Real prompts you can type the moment it's connected — no setup, no docs to read.
“What can SignatureAPI do for me?”
“Show me the tools SignatureAPI exposes.”
How secure is the SignatureAPI MCP server?
Every server in the gate directory has to pass the same four checks before your AI can touch it. Here's how SignatureAPI holds up.
Official endpoint
Operated by SignatureAPI (signatureapi.com) at its documented MCP endpoint — not a third-party mirror or community re-host.
OAuth sign-in — your account, your rules
You grant access from your own SignatureAPI account and can revoke it there at any time. gate never sees your password.
Scanned before it goes live
gate checks every tool for prompt injection, hidden instructions, data-exfiltration hints, and over-broad permissions before the server is available through your gateway.
Watched for drift
If SignatureAPI adds or changes tools later, gate re-scans and alerts you — before your AI acts on the change.
SignatureAPI's server requires OAuth, so it can't be scanned anonymously — connect it in gate and the same scan runs automatically before it goes live.
Connected in three steps
Connect your gate
Add one gateway URL to Claude, ChatGPT, or any MCP client. One-time setup, about two minutes.
Pick SignatureAPI
Choose SignatureAPI in the gate directory. Sign in to your SignatureAPI account to grant access.
Use it anywhere
SignatureAPI's tools are live in every AI client you've connected — with rules and logging built in.
Free to start · No credit card · No hosting needed
Who runs the SignatureAPI MCP server?
The SignatureAPI MCP server at a glance
https://mcp.signatureapi.com/mcpQuestions, answered
Is there an official SignatureAPI MCP server?
Yes — SignatureAPI operates its own remote MCP server at mcp.signatureapi.com. gate connects you to that official endpoint and adds security scanning, per-tool access rules, and an activity log on top.
How do I connect SignatureAPI to Claude or ChatGPT?
Add gate's gateway URL to your AI client once, then pick SignatureAPI in the directory. You sign in to SignatureAPI via OAuth to grant access. From then on, SignatureAPI's tools are available in every client you've connected to gate.
Do I need to host anything?
No. SignatureAPI runs the server, and gate is fully managed. You just connect one URL — there's nothing to install, deploy, or maintain.
Is the SignatureAPI MCP server safe to connect?
It's the vendor's official endpoint, and gate scans its tools for prompt injection and hidden instructions before it goes live, re-checks it whenever it changes, and lets you allow, block, or require approval for every single tool.
Is it free?
Yes — you can get started with gate for free and connect SignatureAPI in minutes. No credit card required.
Connect more than just SignatureAPI
Every server below works through the same gateway URL — connect once, add tools anytime.
Squarespace DomainsDesignView →Set up SignatureAPI in: Claude · Claude Code · ChatGPT · Cursor · VS Code