Terms of Service

1. Who we are

Messo (the “service”) is operated by Lifecycle Innovations Limited, a company incorporated in Hong Kong (Business Registration #76545088, registered office at 144-151 Connaught Road West, Unit 4005, 40/F, Hong Kong) (“we”, “us”). These terms form a contract between you (the “customer”) and us. By creating an account, generating an API key, or calling the API, you agree to them. If you use Messo on behalf of a company, you confirm you have authority to bind it.

2. The service

Messo is a developer API for sending WhatsApp messages programmatically from phone numbers you link to the service. It provides:

• A send API (POST /v1/messages and related endpoints) for text and media messages, with delivery receipts and idempotency keys.
• Number linking via QR code or pairing code, per-number send queues with pacing and warm-up limits, and session health monitoring.
• Outbound webhooks for delivery status, inbound messages, and session health events.
• A developer console for API keys, logs, usage, and number status.

Messo is a self-serve developer product. We provide the rails; what you send, and to whom, is your responsibility.

3. WhatsApp connection and ban risk

• Meta can restrict or ban your number. WhatsApp's terms do not allow automated use outside their official Business API. Numbers flagged as automated can be rate-limited, temporarily restricted, or permanently banned — even when you use Messo in good faith and send legitimate messages.
• We cannot prevent a ban. Messo paces and throttles sending (per-number queues, warm-up limits, human-like pacing) to reduce risk, but pacing lowers risk; it does not remove it. A ban can still happen.
• You are responsible for your number. If your number is restricted or banned, you — not Messo — handle recovery with WhatsApp/Meta. We will alert you (dashboard and session.health webhook) and help you re-pair, but we cannot unban a number and we are not liable for the consequences of a ban (see section 10).
• Use a dedicated number. We strongly recommend connecting a dedicated business number, not your personal or primary business line. Warm new numbers up gradually and keep the first weeks low-volume.
• Protocol changes can cause outages. WhatsApp can change its protocol at any time, which can temporarily break Messo's connection for all users. We monitor this continuously and ship fixes, but short outages are possible.

By connecting a number you confirm you have read and accept these risks. Messo is not affiliated with, endorsed by, or sponsored by WhatsApp LLC, WhatsApp Ireland Limited, or Meta Platforms, Inc.

4. Accounts and API keys

• You must provide accurate account information and keep your API keys and webhook signing secrets confidential. You are responsible for all activity under your keys, including activity by your employees, contractors, and systems.
• Rotate keys promptly if you suspect compromise, and revoke keys you no longer use. We may revoke or rotate keys we believe are compromised.
• One account per real business entity. Creating multiple accounts to evade limits, suspensions, or fees is a violation of these terms.
• You must be at least 18 years old, or the age of majority in your jurisdiction, to use the service.

5. Acceptable use

Because messages go out from your number, you are the sender in the eyes of recipients, regulators, and WhatsApp. You may not use Messo to send, or to facilitate sending:

• Unsolicited bulk messages. No marketing, promotional, or broadcast messages to recipients who have not given prior express consent (opt-in). “They are my customers” is not consent; “they gave me their number once” is not consent.
• Spam and scams. Phishing, fraud, impersonation, deceptive offers, pyramid or Ponzi schemes, fake invoices, or any message designed to mislead.
• Unlawful content. Anything illegal in the sender's or recipient's jurisdiction: threats, harassment, hate speech, defamation, or instructions facilitating wrongdoing. CSAM has zero tolerance — the account is terminated and reported to authorities.
• Regulated content without authorization. Financial advice, medical advice, gambling, alcohol, or pharmaceuticals where local law requires a license or opt-in you cannot demonstrate.
• Content that violates WhatsApp's own Commerce or Business policies. Messo does not shield you from Meta enforcement.

You also may not:

• Attempt to circumvent Messo's pacing, warm-up limits, or rate limits — including rotating numbers or splitting traffic across accounts to evade caps.
• Use Messo for number harvesting, contact scraping, or building recipient lists from public sources.
• Probe, scan, or test the vulnerability of the service, or interfere with other customers' use.

We monitor aggregate sending patterns (volumes, complaint signals, ban and repair events, block rates). We do not routinely read message content, but we may review content in response to complaints, suspected violations, or legal process. Automated flags can trigger human review.

Enforcement. First or low-severity issues: warning with a remediation window. Repeat or medium-severity issues: throttling, feature restriction, or temporary suspension. Severe issues (scams, CSAM, active harm, evasion): immediate termination without refund for the current period, and reporting to authorities where required by law. Enforcement decisions are ours to make in good faith.

6. Consent and opt-out

For messages you send through Messo, you must:

• Obtain prior express consent before sending marketing or non-transactional messages. Transactional messages (order confirmations, OTPs, appointment reminders, delivery updates) require at minimum an existing business relationship and a clear opt-out path.
• Honor opt-outs immediately. Every marketing-type flow must support STOP/UNSUBSCRIBE (or the local equivalent), and you must suppress opted-out recipients within 24 hours.
• Identify yourself. The first message in any marketing flow must clearly state who you are and why the recipient is hearing from you.
• Keep consent records. Be able to demonstrate, per recipient, when and how consent was obtained. We may ask for this evidence during a review.

Suspected abuse of the service can be reported to [email protected]. Reports are reviewed by a human.

7. Fees and billing

• Messo bills on a metered, per-message basis at the rates published on our pricing page. By sending messages you incur fees at the then-current rates.
• Fees are billed via Stripe to the payment method on your account. Applicable taxes (including VAT/GST where Stripe Tax applies) are added at checkout.
• Fees for messages already sent are non-refundable, including where a number is later restricted or banned by WhatsApp — the send, not the delivery outcome, is what you pay for. Credits or refunds are given only where required by law or at our discretion.
• We may change rates with at least 30 days' notice; the new rates apply to messages sent after the change takes effect.
• We may suspend the service for overdue amounts after notice. You remain responsible for fees incurred before suspension.

8. Suspension and termination

• You may cancel at any time from the console. Cancellation takes effect at the end of the current billing period; API keys are revoked and sessions unpaired on termination.
• We may suspend or terminate your account immediately, without refund for the current period, for: acceptable-use violations, non-payment, fraud, security risks, circumvention of limits, or legal or regulatory requirements.
• On termination we delete or return your data as described in our Privacy Policy and DPA.

9. No warranty

Messo is provided “as is” and “as available”, without warranties of any kind, express or implied, including merchantability, fitness for a particular purpose, and non-infringement. We do not warrant that the service will be uninterrupted, error-free, or that any particular message will be delivered — delivery ultimately depends on WhatsApp's systems, which we do not control.

10. Liability

To the maximum extent permitted by law: (a) we are not liable for any indirect, incidental, special, consequential, or punitive damages, or for loss of profits, revenue, data, or business opportunity; (b) our aggregate liability for any claim arising out of or relating to these terms or the service is limited to the fees you paid in the 12 months before the event giving rise to the claim.

In particular, we are not liable for: WhatsApp restrictions or bans of your number; messages that fail, are delayed, or are not delivered; service interruptions caused by WhatsApp protocol changes; or actions you take based on delivery receipts.

Nothing in these terms excludes liability that cannot be excluded under Hong Kong law.

11. Indemnity

You will indemnify and hold us harmless against claims, damages, losses, and reasonable costs (including legal fees) arising from: your messages and their content; your violation of these terms or of applicable law (including consent and anti-spam laws); claims by message recipients; and claims by WhatsApp/Meta relating to your use of the service.

12. Intellectual property

Messo, its software, documentation, and branding are ours or our licensors'. You receive no ownership rights. You may not claim any affiliation with, endorsement by, or partnership with WhatsApp or Meta. You retain all rights in your message content; you grant us the limited license needed to transmit, store, and process it to provide the service.

13. Changes

We may update these terms with at least 30 days' notice via email or console banner. Material changes give you the right to cancel before they take effect; continued use after the effective date is acceptance.

14. Governing law and disputes

These terms are governed by the laws of the Hong Kong Special Administrative Region, without regard to conflict-of-laws rules.

Any dispute arising out of or in connection with these terms or the service — including questions of existence, validity, or termination — will be referred to and finally resolved by arbitration administered by the Hong Kong International Arbitration Centre (HKIAC) under the HKIAC Administered Arbitration Rules in force when the notice of arbitration is submitted. The seat of arbitration is Hong Kong, there will be one arbitrator, and the language is English.

Nothing in this section prevents either party from seeking interim or injunctive relief from any court of competent jurisdiction.

15. General

• These terms, with the documents they reference (Privacy Policy, DPA), are the entire agreement for the service.
• If any provision is unenforceable, the rest remain in effect.
• You may not assign these terms without our consent; we may assign them in connection with a merger, acquisition, or sale of assets.
• Notices to you go to your account email; notices to us go to [email protected].