Nobody enjoys chasing overdue invoices. It's necessary, a little uncomfortable, and completely mechanical — you check the accounting software, find the outstanding amount, open your email, draft a professional reminder, and send it.
Every step of that process can be delegated to Companion.
The demo
We switched to Claude Sonnet in Companion — a stronger model for tool-heavy tasks — and asked:
Hey Claude, can you please use Zoho and tell me if we have any unpaid bills at the moment?
Companion connected to Zoho through the Zoho MCP, ran the query, and came back with a clear answer: yes, there were overdue invoices, with amounts and client names listed.
Then we followed up:
Can you draft (and not send) an email to SKS Innovation about their outstanding amount to remind them, please?
Companion used the Gmail MCP to draft the email. Professional subject line, correct outstanding amount pulled directly from Zoho, polite but clear reminder language.
The email was ready to review and send in under 30 seconds. We didn't touch Zoho. We didn't open Gmail manually. We didn't write a single word of the email.
Why "not send" matters
Notice the prompt said "draft and not send." Companion follows that instruction precisely.
This is important for anything going to clients: you want the AI to do the drafting work, but you want to review before it goes. Companion supports this — it can draft, hold, and only send when you confirm.
You stay in the loop for decisions. The mechanical work happens automatically.
What makes this possible: stacking integrations
This two-step workflow used two separate MCP integrations together:
Zoho MCP — reads your accounting data (invoices, clients, payment status) Gmail MCP — drafts and sends emails on your behalf
Neither tool alone does what the combined prompt does. Zoho MCP without Gmail would give you information but no action. Gmail MCP without Zoho wouldn't know which clients owe what.
Together, one prompt crosses both systems and produces something useful.
This is the core idea behind Companion's integration model: the apps, when activated together, become more than the sum of their parts.
Choosing the right model for tool use
In the demo, we switched from a lightweight model to Claude Sonnet for this task — and we explained why mid-prompt.
Lightweight models like Gemini 2.5 Flash are fast and cheap. They're well-suited for simple tasks: send a quick email, summarize a short document. For those, you don't need a powerful model.
Tool-heavy workflows — querying an accounting system, parsing structured data, drafting a context-aware email — benefit from a model with stronger reasoning. Claude Sonnet, or Claude Opus for complex chains, handles these more reliably.
Because Companion is BYOK via OpenRouter, you can switch models mid-conversation. Use the cheap model for the easy parts, the strong model when the task demands it. You're paying OpenRouter rates directly — no platform markup — so this optimization actually matters for cost.
Other accounting workflows you can automate
Once Zoho MCP is installed, here are other prompts that work:
- Monthly reconciliation summary: "Summarize all paid and unpaid invoices from April"
- Client payment history: "What's the payment history for [client name]?"
- Expense review: "List all expenses over $500 from last month"
- Invoice creation: "Create an invoice for [client] for [service] at [amount]"
Combine those with email and calendar integrations, and you can automate the full client billing cycle from a conversation.
The practical value
The value here isn't just time saved — it's motivation saved.
Chasing invoices is the kind of task that gets postponed because it's mildly unpleasant. With Companion, the friction is gone: one prompt, and the reminder is drafted and ready. You review it, click send, done.
"I don't have to motivate myself to do it" was how we described the accounting demo. That's more honest than most AI productivity claims: it doesn't just make tasks faster, it makes them easy enough that you actually do them.
Download Companion and install the Zoho and Gmail MCP integrations to try this yourself.