Signatoro

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Barındırılan MCP Sunucusu

npx add-mcp 'https://signatoro.com/mcp'

Claude Code, Codex, Cursor ve daha fazlasına kurulur

Dokümantasyon

Connect Claude or ChatGPT to Signatoro with MCP

Add the MCP server of Signatoro, the agentic email signature platform, to Claude, Claude Code or ChatGPT: make a free email signature in chat, fetch or edit your saved one, sign as one of your AI assistants, and manage your company's people.

Signatoro runs a hosted MCP server. Add it to Claude, Claude Code, ChatGPT, Grok or any other MCP client, and the assistant can make an email signature, give the steps to install it in a mail app, fetch and edit the signature you saved, send with an AI assistant's own signature, and, for a company owner, add, update and remove the company's people.

The server address is:

https://signatoro.com/mcp

It speaks MCP over streamable HTTP. Making a signature and reading the install steps work right away. The tools that use your Signatoro account ask you to sign in the first time you call one.

Three tools work without an account, eight with one

Without signing in:

ToolWhat it does
create_signatureMakes a free signature from a name plus an optional title, company, phone, email, website, LinkedIn, layout and color. Returns HTML, plain text and claimUrl, a link that opens the free generator with the same details and layout, to save it to an account and keep editing. Nothing is saved until you do. The link works for 7 days.
list_templatesLists the layouts, each with what it shows and when it fits.
get_install_stepsReturns the steps from Signatoro's install guide for a mail app, such as gmail, outlook-new or apple-mail, with the link to the full guide.

Signed in:

ToolWhoWhat it does
get_signatureEveryoneThe assistant calls it for an email you want signed, with any mail tool, and appends your saved signature; with the email signature rule in its instructions, it calls it before every email it sends or drafts. Returns it as HTML and text, with sender: your name, title, company, email, phone, website, LinkedIn and booking link as fields, so the body uses your real details. Pass signature with an agent's id or name to send with that agent's signature instead. Each call counts as one API request: 50 a month on Free, unlimited on a company plan.
list_signaturesEveryoneLists the signatures you can send with: your own (me, the default) and those of your AI assistants and of company agents you can use, each with how it signs, its disclosure line choice and a one-line preview.
update_my_signatureEveryoneChanges the fields you name in your saved signature, or creates it if you have none yet. Returns the updated signature with sender, which counts as one API request like get_signature. A connected mailbox gets the new version.
list_membersCompany ownersLists the company's people with their status and whether their signature is installed.
add_memberCompany ownersInvites a person by email with their name, title and phone. They get the invitation with their signature in it.
update_member_fieldCompany ownersChanges a person's name, title or phone. A joined member gets their updated signature by email.
remove_memberCompany ownersRemoves a person from the company. This cannot be undone, so it takes two steps: the assistant shows you who would be removed, and removes them only after you say yes.
resend_inviteCompany ownersSends an invitation again and renews it if it expired.

Each company tool follows the rules of the company page: only an owner can use it, the plan's size limit applies, and the primary owner and the person asking always stay in the company.

In a company, the company sets the company name, website, logo, layout, color, font, review badge, booking button and footnote for everyone. get_signature and update_my_signature list those parts and who changes them: an owner gets the link to the company's page on signatoro.com, and a member is told to ask the owner. update_my_signature leaves those fields as they are and says which ones it skipped.

Choose which signature to send with

An AI assistant can send with your signature or with one of your AI agents' own, which carry a line saying it is an AI and whom it acts for. Set the agents up on Signatoro first: the agent guide covers the two ways an agent signs and the disclosure line choices.

  • Pick per email. Under "Connected assistants" on your signature page, leave "Signs as" on "Me". The assistant calls list_signatures, passes the one it wants to get_signature as signature, and asks you when it is unclear which one an email needs.
  • Lock the connection to one agent. Set "Signs as" to the agent. Every get_signature call then returns that agent's signature, and list_signatures lists only that agent. update_my_signature is refused on that connection, since the agent's signature is managed on signatoro.com.

An agent's signature comes back with two more fields, as in the agent guide: agent, with its name, whom it acts for and disclosure (the line in the signature and a label sentence for the first line of the body, the agent's call), and signature, naming the one that was served. Keep the disclosure line; it is part of the signature. When a company requires one line for every agent, companyControlled lists "AI disclosure".

If the agent was deleted, or is no longer yours, get_signature returns an error and serves nothing, your own signature included. Bind the connection to another agent, or set it back to "Me", on signatoro.com.

Connect Claude

Signatoro is in Claude's connector directory: Signatoro in Claude. The same listing serves Claude.ai, the desktop and mobile apps, Claude Code and Cowork.

  1. In Claude, open Customize, then Connectors.
  2. Find Signatoro in the directory and connect it.
  3. In a chat, click "+" at the lower left, then Connectors, and turn Signatoro on.

On a Team or Enterprise plan, an owner adds Signatoro under Organization settings, then Connectors, and each member then connects with their own Signatoro account. A Team member without that permission clicks "Request", which asks the owners to add it.

When a tool needs your account, Claude shows a Connect card in the chat. Sign in to Signatoro, check what the assistant asks to do, and click "Approve".

In Claude Code, run this in a terminal:

claude mcp add --transport http signatoro https://signatoro.com/mcp

Claude Code opens the Signatoro sign-in page in your browser the first time a tool needs your account.

Connect ChatGPT

ChatGPT connects to your own MCP servers in developer mode, on ChatGPT on the web. OpenAI documents the switch in two places and the labels differ by account, so if one path is missing, try the other:

  1. Turn on developer mode: Settings, then "Security and login", then "Developer mode". Some accounts have it under Settings, then Apps, then "Advanced settings".
  2. Add the server: on ChatGPT's Plugins page click the plus button, or under Settings, then Apps, click "Create". Give it the name Signatoro, paste https://signatoro.com/mcp as the server URL, keep OAuth as the authentication, and create it.
  3. Start a new chat and add Signatoro from the tools menu.

On a Business, Enterprise or Edu workspace, an admin turns on developer mode for the workspace first.

Connect Grok

xAI documents custom connectors for Grok:

  1. Go to grok.com/connectors.
  2. Click "New Connector", then "Custom".
  3. Enter https://signatoro.com/mcp as the MCP server URL and sign in to Signatoro.

On Grok Business and Enterprise, a team admin provisions the connector first. A Grok Bot fetches the signature from the API instead: the Grok Bot guide has the steps, and the Grok guide covers every other way Grok sends email.

Sign every email

Connected, an assistant adds your signature to an email you ask it to sign. To have it sign every email it sends, or ask you each time, add the email signature rule to its instructions: "Instructions for Claude" in Claude's Settings, ChatGPT's custom instructions, a Grok Bot's instructions, or CLAUDE.md or AGENTS.md for a coding agent.

Connect with an API key

Some agents add an MCP server with a URL and a header, and have no OAuth sign-in. Connect them with a Signatoro API key:

  1. On the signature page, under "For tools and assistants", click "Generate API key". For an AI agent, generate the key for that agent, so it always gets the agent's signature.
  2. In the agent's MCP settings, enter https://signatoro.com/mcp as the URL and the key as the bearer token: the header Authorization: Bearer sig_live_....

A key reads signatures: get_signature and list_signatures, counted like the REST API. Changing your signature and managing your company's people take the OAuth sign-in. To end the connection, revoke the key on the signature page.

Find Signatoro in MCP directories

  • Claude's connector directory: connect Signatoro in Claude.ai, the Claude apps, Claude Code and Cowork.
  • Smithery: add Signatoro to your toolbox and connect it from any client Smithery supports.
  • The official MCP Registry, as com.signatoro/signatoro: clients that read the registry find the server by that name.

A prompt to start with

Use Signatoro. Make me an email signature: Maya Okafor, Head of Operations
at Northwind Supply, +44 20 7946 0123, northwind.co. Show me the layouts
first and use the one that suits a reply-heavy inbox. Then give me the
steps to add it in Gmail.

Signed in:

Use Signatoro. Change the title in my signature to Head of Design and
send me the updated version.

For an owner:

Use Signatoro. List the people in my company, then invite
sam@northwind.co as Sales Lead.

Signing in and privacy

Signing in uses OAuth. The assistant sends you to Signatoro's own sign-in page, where you sign in as usual, with two-factor authentication if you set it up, and approve the connection. The assistant receives a token that works only with https://signatoro.com/mcp, lasts an hour and renews itself. Your password stays with Signatoro.

The server handles signature details and your company's people. The email you write stays between you, the assistant and your mail app. To end a connection, remove the connector in Claude or ChatGPT.

Signatoro MCP questions

What is the Signatoro MCP server URL?

The Signatoro MCP server URL is https://signatoro.com/mcp. It uses the streamable HTTP transport. Add it as a custom connector in Claude, as an app in ChatGPT developer mode, or with claude mcp add --transport http signatoro https://signatoro.com/mcp in Claude Code.

Do I need a Signatoro account to use it?

Making a signature with create_signature, listing layouts and getting install steps work without an account. Fetching your saved signature with get_signature, editing it with update_my_signature and managing a company's people need a Signatoro account, and the assistant asks you to sign in the first time.

How many times can an assistant fetch my signature?

Each get_signature call counts as one API request, the same count as the signature API. The Free plan includes 50 requests a month, and a company plan has no limit. An update_my_signature call that changes something counts as one request too, since it returns the updated signature. With the month used up, the change is still saved.

Why can't the assistant change my logo or review badge?

In a company, the logo, colors, layout, font, website, review badge and booking button come from the company, so every signature matches. The company's owner changes them on the company's page at signatoro.com. The assistant tells you which parts these are and who to ask.

Can an AI assistant sign emails as itself instead of as me?

Yes. Add an AI assistant on your signature page, choose whether it signs as you or as itself, and pick its disclosure line. Then the assistant passes it to get_signature as signature, or you lock the connection to it under "Connected assistants". Assistants come on top of the people your plan covers.

Can an assistant manage my company's people?

Yes, when you own the company. After you approve the connection, the assistant can list, invite, update and remove people and resend invitations, with the same limits as the company page. These tools are for owners only.

Related: Gmail MCP and Outlook MCP, for adding your signature to email sent through Google's and Microsoft's mail MCP servers.

Sources

Checked against the vendors' own documentation on 2026-09-28: