Question 1

What's the difference between the $15 and $20 plans?

Accepted Answer

Both plans get you the same messaging product: always-on WhatsApp, unlimited inbound and outbound, signed webhooks. The $20 plan also enables voice calling on the line — click-to-call from your dashboard, the call goes through your customer's WhatsApp to anyone. Unlimited minutes, no per-minute fees. You pick the plan per line; you can mix messaging-only and calling-enabled lines under the same API key.

Question 2

Can I let my customers decide if they want calling instead of paying for it on every line?

Accepted Answer

Yes. Stay on $15 messaging by default and pass allow_calling: true on POST /api/v1/wa/lines — the Mossmoon-hosted connect page shows your customer a simple "Make and receive calls?" toggle before the QR. If they enable it, that specific line bills $20/month; if they skip it, that line stays $15. Your customer never sees Mossmoon's pricing; they just see a feature toggle. See the API docs for the full flow.

Question 3

Does the calling toggle change my customer's experience?

Accepted Answer

No — to your customer it's just a single toggle on the connect page. There's no extra setup, no second QR, no second account. They scan once and their WhatsApp number is connected with whichever feature set you (or they) chose. Toggling later isn't supported in v1 — the choice is locked at QR-scan time. To add calling to an existing line, release it and provision a fresh one.

Question 4

Are there per-minute charges for calling?

Accepted Answer

No. Calling-enabled lines are flat $20/month regardless of call volume. Normal business use is fully covered — sustained heavy use (lines averaging 50+ minutes/day every day) may be moved to a custom plan; we'll reach out before anything changes.

Question 5

How does the 7-day free trial work?

Accepted Answer

Your first line ever is free for 7 days from when it goes ready (i.e. when your customer scans the QR — not from signup). After day 7, that line bills at $15 or $20/month depending on whether calling is enabled. The trial is per-account and one-time; subsequent lines start billing immediately.

Question 6

Why do I need a card before I can provision my first line?

Accepted Answer

So we can charge $15 or $20 cleanly when your trial ends, without interrupting your customer's line. The card is tokenized by Square — we never see or store the number — and you can remove it anytime.

Question 7

If my customer scans their QR twice, am I charged twice?

Accepted Answer

No. Per-line billing is idempotent — once a line goes ready, re-scans and re-links within the same 30-day cycle never re-charge. And if you pass agency_external_user_id on your POST /api/v1/wa/lines call (strongly recommended), accidental double-POSTs from your side return 409 Conflict with the existing line's connect_url instead of creating a new billable line. Without agency_external_user_id, we can't dedupe — every POST creates a new line and a new charge. Set it on every call.

Question 8

How do I intentionally provision a second line for the same customer?

Accepted Answer

Pass a different agency_external_user_id on the second call — e.g. 'customer_123_personal' for one and 'customer_123_business' for the other. Two billable lines, both attributable in your webhooks. The 409 dedup only kicks in when the exact same agency_external_user_id is reused while a line is still active.

Question 9

When does the clock start on a paid line?

Accepted Answer

When the line transitions to ready (i.e. your customer actually scanned the QR). Provisioning is free.

Question 10

What happens if a charge fails at renewal?

Accepted Answer

We hold the line in a 5-day grace window and retry the charge daily. If the card keeps failing, the line is auto-released and we fire line.released with reason: "billing" so your app can update.

Question 11

Can I cancel a line mid-month?

Accepted Answer

Yes. DELETE /api/v1/wa/lines/{id} stops all future charges immediately. We don't pro-rate refunds for the current month (the infra cost is already committed).

Question 12

What if a customer's line gets disconnected and reconnects later?

Accepted Answer

If still inside the current paid month, no extra charge. If the previous month had elapsed (e.g. they were disconnected 35+ days), the re-link counts as a renewal and we debit the line's current monthly price.

Question 13

How do I see what I'm being charged?

Accepted Answer

Your dashboard shows current wallet balance and every active line. Each line says its monthly price ($15 or $20), when it was last charged, and when the next charge fires.

Question 14

Wallet vs card on file — which is it?

Accepted Answer

Both. The card on file is the default — auto top-up keeps your wallet funded so renewals never miss. You can also top up the wallet manually anytime. Use whichever fits your finance workflow.

Question 15

Volume discounts?

Accepted Answer

Not at the moment. Same $15 (or $20 with calling) whether you have 1 line or 1,000. If you're planning a deployment over a few hundred lines, email support@mossmoon.app and we'll discuss.

Item	Calculation	Per month
28 messaging-only lines	28 × $15	$420
12 calling-enabled lines	12 × $20	$240
Per-message fees	none	$0
Per-minute call fees	none	$0
Setup fees	none	$0
Total with Mossmoon		$660
Self-hosted alternative^* hosting, proxies, verification, call infra, ops	28 × ~$42 + 12 × ~$58	~$1,872
You save with Mossmoon		~$1,212 / mo

Per line, per month. Flat.

You pick everywhere, or let your customers pick per line.

Calling on every line.

Let your customer choose.

Need something custom?

Card on file. Auto top-up. No surprises.

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Common pricing questions

Start with one line. Free for 7 days.