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Terms of Service

The rules of the road.

Last updated: June 26, 2026

Welcome to PostSider (the “Service”), a social media scheduling, publishing, analytics and team collaboration platform with a first-class agent bridge, available at postsider.com and related sub-domains (collectively, the “Site”). These Terms of Service (“Terms”) govern your access to and use of the Site and the Service. By creating an account, accessing, or using the Service you agree to be bound by these Terms. If you do not agree, do not use the Service. For how we handle personal data, see our Privacy Policy.

1. Who We Are

The Service is operated by Lumi Zone Łukasz Blania, a sole proprietorship (jednoosobowa działalność gospodarcza) registered in Poland, with its place of business at ul. Zabrska 15, 40-083 Katowice, Poland, Tax Identification Number (NIP) 1990132289 (“PostSider”, “we”, “us” or “our”). PostSider is the contracting party for paid subscriptions and is the entity registered with the third-party social media platforms whose APIs the Service integrates with (including, without limitation, X / Twitter, Meta Platforms, LinkedIn, YouTube, TikTok, Pinterest, Threads, Bluesky, Mastodon, Discord, Slack, Telegram and others).

2. Eligibility and Accounts

You must be at least 18 years old, or the age of majority in your jurisdiction, and capable of entering into a binding contract to use the Service. If you use the Service on behalf of an organisation, you represent that you have authority to bind that organisation, and “you” in these Terms refers to both you individually and that organisation.

You are responsible for maintaining the confidentiality of your account credentials and API keys, for all activity that occurs under your account (including actions taken by AI agents you authorise through our API), and for keeping your account information accurate and current. You must notify us promptly at lukasz@postsider.com of any unauthorised use of your account.

3. The Service

PostSider provides tools to schedule, publish, analyse, manage and collaborate on content distributed to 30+ social media and chat channels, including without limitation: a calendar and scheduling engine, a media library, analytics, AI-assisted content generation, team and workspace management, integrations with third-party platforms, and a first-class agent bridge that lets your own AI agents operate the Service over MCP, REST and SDK. Specific features, channels and limits depend on the plan you subscribe to and may change from time to time.

We may add, remove, modify, suspend or discontinue any feature, integration or channel at any time, including where a third-party platform changes or revokes API access. We will use commercially reasonable efforts to give notice of material changes that adversely affect paid subscribers.

4. Subscriptions, Fees and Billing

By purchasing a subscription you authorise PostSider (and its third-party payment processors) to charge the applicable fees to your chosen payment method on the recurring billing cycle you selected (monthly, annual or other). Subscriptions automatically renew at the end of each billing period at the then-current rate unless cancelled before renewal.

Except where required by applicable law (including mandatory consumer-protection law) or expressly stated otherwise in a written refund policy on the Site, all fees are non-refundable, including for partially used periods. Cancelling your subscription stops future renewals; it does not entitle you to a pro-rata refund of the current period.

Consumer right of withdrawal. If you are a consumer in the European Union (which, under Polish law, includes a natural person running a sole proprietorship who concludes a contract that is not of a professional nature for them), you have the right to withdraw from a distance contract within 14 days without giving a reason. Because the Service is digital content and a digital service supplied immediately, you may ask us to begin providing it before the withdrawal period ends. By starting to use the Service (including any paid plan or paid trial) and expressly requesting immediate provision, you acknowledge that you will lose your right of withdrawal once the service has been fully performed, and that for a paid period already supplied at your request you may be charged for what was provided up to your withdrawal. To withdraw, email lukasz@postsider.com within 14 days of purchase. This section does not limit any stronger mandatory rights you have under the law of your country of residence.

Fees are exclusive of taxes, duties and similar government charges, all of which are your responsibility unless we are required to collect them. We may use third-party payment processors (for example Stripe, Paddle or similar). Your payment information is handled in accordance with the processor’s terms and privacy policy.

We may change pricing for new billing periods on at least 30 days’ notice by email or in-product notice. Continued use of the paid Service after a price change takes effect constitutes acceptance of the new price.

5. Free Plans, Trials and Beta Features

We may offer free plans, free trials, or features marked as “beta”, “preview” or similar. Such offerings are provided “as is”, may be subject to additional limits, and may be modified or discontinued at any time without notice. We make no warranties of any kind in respect of free or beta features.

6. Your Content

“Your Content” means any text, images, video, audio, links, metadata, schedules, prompts, configurations and other materials you upload to, generate within, or transmit through the Service, including content created or scheduled by an AI agent acting on your behalf. As between you and PostSider, you retain all ownership and intellectual-property rights in Your Content.

You grant PostSider a worldwide, non-exclusive, royalty-free licence to host, store, reproduce, transmit, display, adapt and distribute Your Content solely for the purposes of operating, providing, securing and improving the Service, including transmitting Your Content to the third-party social media platforms you have connected, and generating analytics, previews and related outputs.

You represent and warrant that you own, or have all necessary rights, licences and permissions in, Your Content; that Your Content and its publication via the connected platforms do not infringe any third-party right; and that Your Content complies with these Terms, applicable law and the terms of every third-party platform to which it is published.

7. Acceptable Use

You agree not to use the Service to, and not to allow any third party or AI agent acting under your account to:

  • publish, distribute or store content that is unlawful, defamatory, harassing, hateful, threatening, sexually exploitative of minors, or that infringes intellectual-property, privacy or publicity rights;
  • send spam, engage in coordinated inauthentic behaviour, run undisclosed bots, mass-create fake engagement, or otherwise violate the platform rules of any connected third-party network;
  • circumvent rate limits, technical restrictions or access controls of the Service or of any connected third-party platform;
  • reverse engineer, decompile, scrape, or attempt to derive the source code of the Service except to the extent expressly permitted by applicable law;
  • resell, sublicense, white-label or otherwise commercialise the Service except under a written agreement with us;
  • upload malware, attempt to gain unauthorised access to the Service, or interfere with the integrity or performance of the Service or its underlying infrastructure.

We may suspend or terminate accounts that violate this section, with or without notice, and may remove offending content. We may also be required to disclose violations to affected third-party platforms.

8. Third-Party Platforms and Integrations

A core function of the Service is to publish Your Content to third-party platforms (including, without limitation, X / Twitter, Meta Platforms (Facebook, Instagram, Threads), LinkedIn, YouTube, TikTok, Pinterest, Bluesky, Mastodon, Discord, Slack, Telegram and others). To do so, you authenticate your accounts on those platforms and authorise PostSider to act on your behalf. Your use of any third-party platform through the Service is also governed by that platform’s terms and privacy policy, including, by way of example:

You can revoke PostSider’s access to any connected platform at any time from your account settings or directly from that platform’s app or permissions page. Revoking access will stop future scheduled posts to that platform.

PostSider is not responsible for the availability, behaviour, policies, fees, content moderation decisions, account suspensions, rate-limit changes or removal of features of any third-party platform. Where a third-party platform changes its API, terminates its developer programme, or modifies its terms in a way that affects the Service, we may modify or discontinue the affected integration without liability.

9. AI Features and Agent Access

The Service may offer AI-assisted features that generate text, images, video, captions, hashtags, summaries or analytics (“AI Output”), and it lets your own AI agents operate the Service through our MCP server, REST API and SDKs. AI Output is generated probabilistically and may be inaccurate, incomplete or unsuitable for your purpose. You are solely responsible for reviewing AI Output before publishing it, for ensuring that it complies with applicable law, third-party platform rules and the rights of any persons depicted, and for disclosing AI involvement where required.

When you connect an external AI agent over our API, that agent acts under your account and the credentials you issue, and the actions it takes are your responsibility under these Terms. To provide AI features we may transmit your prompts and selected inputs to third-party model providers. We do not authorise such providers to train their models on your inputs except where you opt in or where the provider’s default policy requires it (as documented in our Privacy Policy).

10. Intellectual Property of PostSider

The Service, the Site and all software, designs, text, graphics, logos, trademarks and other materials made available by PostSider (excluding Your Content) are the property of Lumi Zone Łukasz Blania or its licensors and are protected by intellectual-property laws. Subject to your compliance with these Terms, we grant you a limited, non-exclusive, non-transferable, revocable licence to access and use the Service for its intended purpose during your subscription.

11. Feedback

If you provide feedback, suggestions or ideas about the Service, you grant PostSider a perpetual, irrevocable, worldwide, royalty-free licence to use them for any purpose, without obligation or compensation to you.

12. Privacy and Data Protection

Our processing of personal data in connection with the Service is described in our Privacy Policy, which is incorporated into these Terms by reference. Where we process personal data on your behalf in respect of your end-users (for example, audience analytics), we do so as a processor and the terms of our Data Processing Addendum apply.

13. Suspension and Termination

You may terminate your account at any time from your account settings. We may suspend or terminate your access to the Service immediately if you breach these Terms, fail to pay fees when due, use the Service in a way that exposes PostSider or any third-party platform to legal, security or reputational risk, or where required by law.

On termination your right to access the Service ends. We may delete Your Content and account data after a reasonable retention period as described in the Privacy Policy. Provisions that by their nature should survive termination (including sections on Your Content licence, intellectual property, fees already accrued, disclaimers, limitation of liability, indemnification, governing law and dispute resolution) survive.

14. Disclaimers

To the maximum extent permitted by law, the Service and the Site are provided “as is” and “as available”, without warranties of any kind, whether express, implied or statutory, including warranties of merchantability, fitness for a particular purpose, non-infringement, accuracy and uninterrupted or error-free operation. We do not warrant that scheduled posts will always be delivered on time, that connected platforms will accept them, or that analytics returned by third-party platforms will be accurate or complete.

15. Limitation of Liability

To the maximum extent permitted by law, in no event shall PostSider, its affiliates, officers, employees, agents or licensors be liable for any indirect, incidental, special, consequential, exemplary or punitive damages, or for any loss of profits, revenue, data, goodwill, business opportunity or anticipated savings, arising out of or in connection with these Terms, the Site or the Service, whether based in contract, tort (including negligence), strict liability or otherwise, even if advised of the possibility of such damages.

The aggregate liability of PostSider arising out of or in connection with these Terms, the Site or the Service shall not exceed the greater of (a) the total fees actually paid by you to PostSider for the Service in the twelve (12) months immediately preceding the event giving rise to the claim, and (b) USD 100. Nothing in these Terms excludes or limits liability that cannot be excluded or limited under applicable law.

16. Indemnification

You agree to indemnify, defend and hold harmless Lumi Zone Łukasz Blania and its affiliates, officers, employees, agents and licensors from and against any claims, liabilities, damages, losses and expenses (including reasonable legal fees) arising out of or in connection with: (a) Your Content; (b) your use of the Service; (c) your breach of these Terms; (d) your violation of any applicable law or any third-party right (including any third-party platform’s terms); or (e) any dispute between you and a third party related to content you published through the Service.

17. Newsletter and Marketing Communications

If you subscribe to our newsletter or opt in to marketing communications, you agree to receive product, promotional and educational emails from PostSider. You can unsubscribe at any time using the “unsubscribe” link in any such email. Transactional and account-related emails (for example billing receipts, security alerts and service notices) are not optional while your account is active.

18. Cookies

The Site currently uses only strictly necessary cookies and similar technologies (for authentication, preferences and security). We do not set non-essential cookies (such as analytics or marketing) without your prior consent; if we introduce them we will request consent through a banner first. This is described further in our Privacy Policy.

19. Changes to the Terms

We may update these Terms from time to time. If a change is material we will give reasonable advance notice by email or in-product notice. Changes are effective on the date stated at the top of the updated Terms; your continued use of the Service after that date constitutes acceptance.

20. Governing Law and Dispute Resolution

These Terms and any non-contractual obligations arising out of or in connection with them are governed by the laws of Poland, without regard to its conflict-of-laws principles. The Polish courts having jurisdiction over the registered place of business of Lumi Zone Łukasz Blania (Katowice) have jurisdiction over any dispute arising out of or in connection with these Terms or the Service, save that PostSider may bring proceedings in any jurisdiction where you are located or where infringement of its intellectual property is occurring.

Nothing in this section limits any non-waivable rights you may have as a consumer under the mandatory law of your country of residence, including, for consumers in the European Union, the right to bring proceedings in the courts of your place of residence.

21. General

These Terms, together with the Privacy Policy, the Data Processing Addendum (where applicable) and any order form or plan-specific terms you accept, constitute the entire agreement between you and PostSider in respect of the Service. If any provision is held invalid or unenforceable, the remaining provisions remain in full force. Our failure to enforce any right or provision is not a waiver of that right or provision. You may not assign these Terms without our prior written consent; we may assign these Terms to an affiliate or in connection with a merger, acquisition or sale of assets.

22. Contact

If you have any questions about these Terms, please contact us at lukasz@postsider.com, or by post at:

Lumi Zone Łukasz Blania
ul. Zabrska 15, 40-083 Katowice, Poland
NIP: 1990132289

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