--- title: "Connect Modusign to VATlayer - APIANT.ai" description: "When \"Document Updated\" fires in Modusign, your agent runs \"Calculate price with VAT\" in VATlayer." canonical: "https://apiant.ai/connect/modusign-to-vatlayer" --- # Connect Modusign to VATlayer When **Document Updated** fires in [Modusign](https://apiant.ai/connections/modusign), your agent runs **Calculate price with VAT** in [VATlayer](https://apiant.ai/connections/vatlayer). Describe the whole flow and it is built, tested on every scenario and kept running. Modusign **1** trigger Modusign **12** actions VATlayer **4** actions What the catalog holds today. Ask for anything missing and your agent reads the API documentation and adds it. ## What do you want Modusign and VATlayer to do together? Give your AI client this address. `https://mcp.apiant.ai` One connection does both: ask your client to act in an app once, or have it build an automation that keeps running. Any client that takes a remote MCP server. Nothing to install. Create your free account, then sign in once in your browser. ### Set it up in your client ### Claude Code Run this in the directory you want to work in. `claude mcp add --transport http -s project apiant-ai https://mcp.apiant.ai` Start Claude Code there, approve the server, and sign in in the browser page it opens. [Claude Code guide (opens in a new tab)](https://apiant.ai/docs/mcp/claude-code) ### Claude, web and desktop Open Customize, then Connectors, then Add custom connector, and paste the address. On Team and Enterprise an owner adds it first. [Setup guide (opens in a new tab)](https://apiant.ai/docs/mcp) ### Cursor Add the address to your MCP configuration as a server URL. Cursor signs you in in your browser. [Setup guide (opens in a new tab)](https://apiant.ai/docs/mcp) ### Zed Open Settings, then AI, then MCP Servers, then Add Server, then Add Remote Server. [Setup guide (opens in a new tab)](https://apiant.ai/docs/mcp) ### Codex and the ChatGPT desktop app Open Settings, then MCP servers, then Add server, and choose Streamable HTTP. From the terminal, Codex takes the address with its own add command and then signs you in. [Setup guide (opens in a new tab)](https://apiant.ai/docs/mcp) ### Any other MCP client Paste the address where the client asks for a remote MCP server URL, and name the server apiant-ai where it lets you. APIANT's skills reach the client over the same connection. [Setup guide (opens in a new tab)](https://apiant.ai/docs/mcp) Example flows ## What Modusign can start in VATlayer - When **Document Updated** in Modusign then **Calculate price with VAT** in VATlayer - When **Document Updated** in Modusign then **Validate VAT number** in VATlayer Starting points drawn from the triggers and actions in the catalog today. Describe the flow you need, at any depth, and your agent builds it and tests every scenario before it ships. Everything your agent can do with Modusign and VATlayer ## Triggers and actions 1 trigger · 16 actions - Trigger **Document Updated** Triggers when a document is created, signed, completed, or aborted. - Action **Add document request** Request signatures on a document (signature request). - Action **Add label** Creates a new label in Modusign. - Action **Cancel document request** Cancel a pending signature request. - Action **Delete label** Delete a label. - Action **Delete template** Delete a template. - Action **Get Document** Retrieves the details of a single Modusign document by its ID. - Action **Get template** Get a template by id. - Action **Get user** Gets the Modusign user whose credentials the connection uses. - Action **Remind Signing** Resend signing request notifications to signers who did not sign. - Action **Request Document With Template** Create a document using a template and request signers to sign it. - Action **Search Documents** Search for documents with specific conditions. - Action **Update label** Update a label. - Action **Calculate price with VAT** Calculates a VAT-compliant price for an amount in a given EU country, optionally using a reduced VAT rate for a type of goods or reversing a VAT-inclusive amount. - Action **Get VAT rate** Returns the standard and reduced VAT rates for a single EU country, chosen by country code or IP address. - Action **List VAT rates** Returns the standard and reduced VAT rates for every EU member state in one call. - Action **Validate VAT number** Checks whether an EU VAT number is valid and returns the company name and address registered to it. ## Each app on its own - [ **Modusign** Modusign is a simple electronic contract service that makes signing a contract and its storage at once at...](https://apiant.ai/connections/modusign) - [ **VATlayer** VAT number validation](https://apiant.ai/connections/vatlayer) Reviews ## What our customers say ## More from Modusign - [ **Modusign to timeBuzzer** timeBuzzer is a simple time tracker and timesheet app to track hours worked across projects in real time.](https://apiant.ai/connect/modusign-to-timebuzzer) - [ **Modusign to Salesforce** Salesforce is a leading enterprise customer relationship management (CRM) platform.](https://apiant.ai/connect/modusign-to-salesforce) - [ **Modusign to Slack** Slack is a messaging platform for teams. Post messages, manage channels, users, reminders, and react to...](https://apiant.ai/connect/modusign-to-slack) - [ **Modusign to Stripe** Stripe is a payment processing platform for online businesses.](https://apiant.ai/connect/modusign-to-stripe) - [ **Modusign to Shopify** Shopify is a commerce platform for online stores and retail point-of-sale.](https://apiant.ai/connect/modusign-to-shopify) - [ **Modusign to QuickBooks Online** QuickBooks Online accounting — manage customers, invoices, bills, payments, vendors, expenses, and more via...](https://apiant.ai/connect/modusign-to-quickbooks-online) ## More into VATlayer - [ **HubSpot to VATlayer** HubSpot is your all-in-one stop for all of your marketing software needs.](https://apiant.ai/connect/hubspot-to-vatlayer) - [ **Salesforce to VATlayer** Salesforce is a leading enterprise customer relationship management (CRM) platform.](https://apiant.ai/connect/salesforce-to-vatlayer) - [ **Slack to VATlayer** Slack is a messaging platform for teams. Post messages, manage channels, users, reminders, and react to...](https://apiant.ai/connect/slack-to-vatlayer) - [ **Google Sheets to VATlayer** Google Sheets](https://apiant.ai/connect/google-sheets-to-vatlayer) - [ **Gmail to VATlayer** Gmail is Google’s email service, featuring spam protection, search functions, and seamless integration with...](https://apiant.ai/connect/gmail-to-vatlayer) - [ **Google Calendar to VATlayer** Google Calendar is a time management tool providing scheduling features, event reminders, and integration...](https://apiant.ai/connect/google-calendar-to-vatlayer) Questions ## Modusign and VATlayer, answered ### ### What can start an automation from Modusign? Any of Modusign's 1 trigger in the catalog, including Document Updated. Describe the moment in plain language and your agent picks the right one. ### ### What can your agent do in VATlayer when something happens in Modusign? Any of VATlayer's 4 actions, including Calculate price with VAT, Get VAT rate, List VAT rates and Validate VAT number. Your agent maps the data both ways and tests every scenario before it ships. ### ### Can it also run from VATlayer to Modusign? VATlayer has no triggers in the catalog today, so automations start in Modusign. If you need the other direction, ask: your agent reads VATlayer's API documentation and adds it. ### ### Do I have to build a connector for Modusign or VATlayer? No. Both are in the catalog with their triggers and actions. You describe the automation; your agent builds it, tests every scenario and keeps it running. ### ### Can my AI client use Modusign and VATlayer without building an automation? Yes. With your AI client connected to APIANT, ask it to do something in either app once and it runs that action on the spot. Ask for an automation and your agent builds it, tests every scenario and keeps it running. One connection covers both. ### ### What happens when something fails? Your agent works that out for you. It plans the failure paths along with the happy path, then tests every scenario before it ships. ### ### Is there a free plan? Yes. Every plan includes the agent, including free, and building from your own AI client spends no assistant credits.