Integration
Connect Saasu to fastbill
When New Contact fires in Saasu, your agent runs Add Payment for Invoice in fastbill. 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 Saasu and fastbill 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 Saasu can start in fastbill
When New Contact in Saasu
then Add Payment for Invoice in fastbill
When New Contact in Saasu
then Create Customer in fastbill
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 Saasu and fastbill
Triggers and actions 1 trigger · 39 actions
Trigger
New ContactTriggers when a new contact is added to your Saasu file.
Action
Add activityCreates an activity (task, call, meeting, note) in your Saasu file, optionally attached to a contact or transaction.
Action
Add companyCreates a company record in Saasu.
Action
Add itemCreates an inventory or combo item in Saasu.
Action
Add journalCreates a manual journal entry with debit and credit lines in a Saasu file.
Action
Create ContactCreates a new contact (person) in your Saasu file and returns its id.
Action
Create Item InvoiceCreates an item-layout invoice, quote or order in Saasu with inventory item line items.
Action
Create Service InvoiceCreates a service-layout sale or purchase invoice in Saasu, with line items described by account and amount.
Action
Delete contactDeletes a contact from your Saasu file.
Action
Delete invoiceDeletes a sale or purchase invoice from the Saasu file.
Action
Delete itemDeletes an inventory item from the Saasu file.
Action
Email invoiceEmails a Saasu invoice to the email address you specify.
Action
Find accountsReturns the accounts in your Saasu chart of accounts, filtered by type, status, bank-account flag or header account.
Action
Find companiesReturns the companies in your Saasu file whose name matches, optionally limited to a last-modified date range.
Action
Find ContactFinds Saasu contacts matching an email, name, company or other criteria and returns the matching contacts.
Action
Find itemsReturns the inventory and combo items whose code or description matches the search text.
Action
Get contactReturns a single Saasu contact by its ID.
Action
Get invoiceReturns a single Saasu invoice (sale or purchase) by its ID, including line items and totals.
Action
Get journalReturns a single journal transaction, including its date, reference, summary and journal line items.
Action
Update contactUpdates an existing contact in Saasu, such as their name, email, phone numbers, addresses and customer/supplier flags.
Action
Update invoiceUpdates an existing Saasu sale or purchase invoice, replacing its details and line items.
Action
Update itemUpdates an existing inventory or combo item in Saasu, such as its code, description, prices, accounts and tax codes.
Action
Add Payment for InvoiceAdds full payment for invoice
Action
Add Payment for RevenueAdds full payment for revenue
Action
Create CustomerCreates a new customer in FastBill
Action
Create InvoiceCreates a new invoice
Action
Create OfferCreates a new offer in FastBill
Action
Create RevenueCreates a revenue entry
Action
Delete CustomerDelete a FastBill customer by ID.
Action
Delete InvoiceDelete a FastBill invoice by ID.
Action
Delete OfferDelete a FastBill offer/estimate by ID.
Action
Finalize InvoiceConverts an invoice draft to a final invoice
Action
Get CustomerFetch a single FastBill customer by ID.
Action
Get InvoiceFetch a single FastBill invoice by ID.
Action
Get OfferFetch a single FastBill offer/estimate by ID.
Action
Search CustomerSearch for a Customer
Action
Search InvoiceFind an invoice
Action
Send Invoice by EmailSend an invoice by email
Action
Update CustomerUpdate fields on an existing FastBill customer.
Action
Update InvoiceUpdate fields on an existing (draft) FastBill invoice.
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
Saasu and fastbill, answered
What can start an automation from Saasu?
Any of Saasu's 1 trigger in the catalog, including New Contact. Describe the moment in plain language and your agent picks the right one.
What can your agent do in fastbill when something happens in Saasu?
Any of fastbill's 18 actions, including Create Customer, Create Invoice, Create Offer and Create Revenue. Your agent maps the data both ways and tests every scenario before it ships.
Can it also run from fastbill to Saasu?
fastbill has no triggers in the catalog today, so automations start in Saasu. If you need the other direction, ask: your agent reads fastbill's API documentation and adds it.
Do I have to build a connector for Saasu or fastbill?
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 Saasu and fastbill 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.