Integration
Connect Sellsy to Modern Treasury
When New Company fires in Sellsy, your agent runs Add invoice in Modern Treasury. Describe the whole flow and it is built, tested on every scenario and kept running.
What the catalog holds today. Ask for anything missing and your agent reads the API documentation and adds it.
Build solutions, not workarounds.
What do you want Sellsy and Modern Treasury to do together?
Ask the assistant
Connect your AI client
Give your AI client this address.
https://mcp.apiant.aiOne 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.aiStart Claude Code there, approve the server, and sign in in the browser page it opens.
Claude Code guide (opens in a new tab)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)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)Zed
Open Settings, then AI, then MCP Servers, then Add Server, then Add Remote Server.
Setup guide (opens in a new tab)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)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)Example flows
What Sellsy can start in Modern Treasury
When New Company in Sellsy
then Add invoice in Modern Treasury
When New Contact in Sellsy
then Add payment order in Modern Treasury
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 Sellsy and Modern Treasury
Triggers and actions 9 triggers · 29 actions
Trigger
Deleted TaskTriggers when a task is deleted.
Trigger
New CompanyTriggers when a new company (client or prospect) is created.
Trigger
New ContactTriggers when a new contact is created.
Trigger
New OpportunityTriggers when a new opportunity is created.
Trigger
New TaskTriggers when a new task is created.
Trigger
Updated CompanyTriggers when a company (client or prospect) is updated.
Trigger
Updated ContactTriggers when a contact is updated.
Trigger
Updated Opportunity StatusTriggers when the status is changed on an opportunity.
Trigger
Updated TaskTriggers when a task is updated.
Action
Create AnnotationCreates a new annotation.
Action
Create CompanyCreates a new company (prospect or client).
Action
Create ContactCreates a new contact.
Action
Create OpportunityCreates an opportunity.
Action
Create TaskCreates a new Task.
Action
Create/Update CompanyCreates a new company (prospect or client). Make an update if we found an existing company with provided email.
Action
Create/Update ContactCreates a new contact. Make an update if we found an existing contact with provided email.
Action
Delete TaskDeletes a Sellsy task.
Action
Find CompanyFinds an existing company (prospect or client).
Action
Find ContactFinds an existing contact.
Action
Get OpportunityReturns one Sellsy opportunity by id.
Action
Get TaskReturns one Sellsy task by id.
Action
List Opportunity Pipeline StepsLists the steps of a pipeline; supplies the required step id for Create Opportunity.
Action
Update Opportunityupdates an existing opportunity's fields, including its status (open/won/lost/cancelled/...) and pipeline step; a status change fires the opportunity.status webhook event.
Action
Update Taskupdates a task's title, description, due date, status etc.; fires task.updated.
Action
Add counterpartyCreates a counterparty — a person or business you send payments to or receive payments from — optionally with its bank accounts and legal entity.
Action
Add expected paymentCreates an expected payment in Modern Treasury so an incoming or outgoing payment can be reconciled automatically when it arrives.
Action
Add external accountCreates an external bank account for a counterparty in Modern Treasury, with its account numbers, routing details and owner information.
Action
Add invoiceCreates an invoice for a counterparty, payable to one of your internal accounts.
Action
Add ledger transactionCreates a ledger transaction made of balanced debit and credit entries against your ledger accounts.
Action
Add payment orderCreates a payment order that moves money between one of your internal accounts and a counterparty's or another internal account.
Action
Delete counterpartyDeletes a counterparty from your Modern Treasury organization.
Action
Get counterpartyReturns a single counterparty, including its accounts, contact details and metadata.
Action
Get invoiceReturns a single invoice by its ID, including its amounts, status, counterparty and line-item details.
Action
Get ledger transactionReturns one ledger transaction, including its ledger entries, status and metadata.
Action
Get payment orderReturns the details of a single payment order, including its amount, status, direction and accounts.
Action
List internal accountsReturns the organization's internal (bank) accounts, optionally filtered by counterparty, legal entity, currency, status or payment capability.
Action
Update counterpartyUpdates an existing counterparty's name, email, external ID, legal entity, metadata, remittance-advice setting or taxpayer identifier. Returns the updated counterparty.
Action
Update payment orderUpdates an existing payment order, for example changing its amount, description, metadata or status (such as cancelling or approving it). Returns the updated payment order.
No trigger or action matches that. Ask your agent to add it: it reads the API documentation and builds what you describe.
Each app on its own
Reviews
What our customers say
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Questions
Sellsy and Modern Treasury, answered
What can start an automation from Sellsy?
Any of Sellsy's 9 triggers in the catalog, including New Company, New Contact, New Opportunity and New Task. Describe the moment in plain language and your agent picks the right one.
What can your agent do in Modern Treasury when something happens in Sellsy?
Any of Modern Treasury's 14 actions, including Update counterparty, Update payment order, Add counterparty and Add expected payment. Your agent maps the data both ways and tests every scenario before it ships.
Can it also run from Modern Treasury to Sellsy?
Modern Treasury has no triggers in the catalog today, so automations start in Sellsy. If you need the other direction, ask: your agent reads Modern Treasury's API documentation and adds it.
Do I have to build a connector for Sellsy or Modern Treasury?
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 Sellsy and Modern Treasury 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.