Terms of Service

Effective Date: May 25, 2026

Operator notice. These Terms are drafted by the platform operator and are not legal advice. If you are deploying OntoBoom into a regulated context, consult qualified counsel.

These Terms of Service ("Terms") govern your access to and use of OntoBoom, a platform consisting of a visual ontology editor (the "Studio"), a public registry of ontologies (the "Hub"), and Model Context Protocol serving endpoints ("MCP Serving"), together the "Service", operated by Global Data Store LLC ("Company", "we", "us", or "our").

By creating an account, publishing content, calling the MCP Serving endpoints, or otherwise using the Service, you agree to be bound by these Terms. If you do not agree, you may not use the Service.

1. Description of Service

The Service consists of three interoperable surfaces:

Studio at app.ontoboom.com — a visual ontology editor with AI-assisted features (the "AI Copilot"), validation, multi-format export, and publishing to the Hub.
Hub at hub.ontoboom.com — a public registry where users publish versioned ontology manifests under a namespace ("@your-handle"). Content can be Public, Unlisted, or Private (defined below).
MCP Serving at mcp.ontoboom.com — every Hub version is exposed as a live Model Context Protocol endpoint that third-party AI agents can connect to and call manifest-derived tools against.

2. Account Registration

To use the Service, you must:

Be at least 18 years of age or the age of majority in your jurisdiction
Provide accurate and complete registration information
Maintain the security of your account credentials
Promptly notify us of any unauthorized use of your account
Accept responsibility for all activities under your account, including any content published to the Hub and any access tokens you issue

3. Your Content

3.1 Ownership

You retain all right, title, and interest in and to the ontologies, schemas, README text, descriptions, reviews, and other content you create or upload ("Your Content"). We claim no ownership in Your Content.

3.2 License You Grant Us

You grant the Company a worldwide, non-exclusive, royalty-free, sublicensable license to host, store, reproduce, transmit, transform (e.g., serialize to alternative RDF formats, derive MCP tool schemas from manifests), display, and distribute Your Content solely to operate, provide, and improve the Service, including:

Storing your ontology versions in the registry database;
Serving Your Content over the API and the MCP Serving endpoints to you and (for Public and Unlisted versions) to third parties and their AI agents;
Deriving MCP tools (list_entities, describe_entity, and any future manifest-derived tools) from Your Content and returning them to callers;
Displaying Your Content on Hub ontology pages, namespace pages, search results, and homepage feeds (for Public content);
Computing aggregate ratings, dependency graphs, and analytics over Your Content;
Generating sitemaps, OpenGraph metadata, JSON-LD AggregateRatingstructured data, and other discovery artifacts.

This license persists for as long as the relevant content remains published and survives termination of your account only to the extent necessary to honor the immutability of published versions (see Section 4.4).

3.3 License You Grant Other Users (for Public Content)

When you publish content to the Hub with visibility set to "Public", you must select a license (SPDX identifier). The chosen license — not these Terms — governs the rights you grant third parties to use, fork, redistribute, and modify the content. Public ontologies without a valid license cannot be published.

3.4 Representations

You represent and warrant that:

You own Your Content or have all necessary rights and permissions to publish it under the license you select;
Your Content does not infringe any third party's intellectual property, privacy, or other rights;
Your Content does not contain personal data of third parties unless you have a lawful basis to publish it;
Your Content does not contain credentials, secrets, access tokens, or other confidential material;
Your Content complies with all applicable laws.

4. Hub Publishing

4.1 Namespaces

The first time you call the namespaces endpoint or publish to the Hub, we provision a personal namespace derived from your account handle ("@your-handle"). You are the sole owner of that namespace and are responsible for everything published under it. Reserved namespaces (including @ontoboom and a list of well-known third-party brands) cannot be claimed and are reserved for the Company.

Most namespaces ("standard" namespaces) are free and become yours the moment you publish to them. A subset of namespaces is classified as "premium" and may only be claimed through a recurring annual subscription:

Premium short — handles of four characters or fewer, US$299/year;
Premium word — recognizable single-word handles drawn from a curated list, US$199/year.

Premium namespace ownership persists while the subscription is active. If the subscription lapses or is cancelled, we apply a 30-day grace period, after which the namespace may be released and become available to others. Content you published under it remains subject to the immutability rules in Section 4.3. See Section 9 for billing terms.

4.2 Visibility

Each catalog entry has one of three visibility settings:

Public — discoverable in Hub search and feeds, served anonymously over MCP, indexable by search engines. Requires an SPDX license. Always free to publish and serve.
Unlisted — not enumerated in search or feeds, but anyone with the URL can read and serve over MCP. Useful for sharing with specific third parties without making the ontology fully public.
Private — readable only by the namespace owner and served over MCP only to callers presenting a valid obt_access token issued by the owner (see Section 5.5). Unauthorized callers receive a 403.

Private and Unlisted publishing, and private MCP serving, require an active Pro or Teams plan on the publishing account. If your plan lapses to Free, existing private/unlisted content remains readable to you, but new private/unlisted publishing and private MCP serving are disabled until you upgrade.

You may NOT downgrade Public to Private. The correct way to retire a version is to yank it (see Section 4.4).

4.6 Featured Listings

The owner of a Public ontology may purchase a featured listing, which promotes that ontology in the "Featured" section of the Hub homepage for a fixed period. Featured listings are a one-time charge (US$49 for one week, US$149 for four weeks), apply only to Public content, and may be purchased repeatedly. Featuring affects placement only; it confers no warranty as to the content and does not alter the license or visibility of the ontology.

4.3 Immutability of Versions

Once a version is published, its manifest, checksum, and metadata are immutable. You may publish higher semver versions; you may not edit or delete a published version's payload.

4.4 Yanking

You may yank a version, which marks it as unavailable for new pulls but does not delete the underlying record. Yanking is appropriate when a version contains a defect, IP violation, or accidentally-published sensitive data; the record itself is retained to honor any consumer that has already taken a hard dependency on the checksum.

4.5 Dependencies

You may declare semver-constrained dependencies on other Hub ontologies. Publishing a version with a dependency on Public or Unlisted upstream content does not require the upstream author's consent; downstream consumers are bound by the upstream author's chosen license.

5. MCP Serving

5.1 Anonymous Public Access

Public and Unlisted Hub versions are served anonymously over MCP atmcp.ontoboom.com/o/@ns/slug@ver. Third-party AI agents (including, without limitation, agents operated by Anthropic, OpenAI, Google, Microsoft, and others) may connect to these endpoints, invoke the manifest-derived tools, and receive responses derived from Your Content.

5.2 Telemetry

We record telemetry on each pull and MCP request (timestamp, version, user-agent, salted IP hash) for abuse prevention, capacity planning, and (in the future) usage analytics surfaced to the namespace owner. We do not store raw IP addresses associated with anonymous traffic.

5.3 Rate Limiting and Abuse

We may apply rate limits, throttling, or temporary blocks to any caller (anonymous or authenticated) that we determine in good faith is abusing the Service or imposing disproportionate cost on the platform. Such limits may change without notice.

5.4 No Warranty on Tool Output

MCP tools derive their output from the manifest published by the namespace owner. The Company does not validate the accuracy, fitness, or legality of any tool response and disclaims all warranties with respect to it. You must independently verify any tool output before using it to make automated decisions, particularly in regulated contexts (financial advice, medical guidance, legal interpretation, etc.).

5.5 Private MCP Serving and Metering

Private ontologies may be served over MCP only to callers presenting a validobt_ Bearer token issued by the namespace owner. The owner is responsible for the issuance, distribution, and revocation of these tokens and for all traffic authenticated with them.

Private MCP serving is metered to the namespace owner, not to the agents or third parties making the requests. Each namespace owner receives a free allowance of 100,000 private MCP requests per calendar month per namespace. Usage above that allowance is billed at US$5 per additional 100,000 requests (or part thereof), aggregated and charged via Stripe. Public and Unlisted MCP serving is not metered and remains free. We count a request at the point our serving endpoint accepts an authenticated private call; our measurement is authoritative for billing purposes absent manifest error.

6. Reviews and Ratings

Logged-in users may post one review per ontology (a star rating 1–5 with an optional comment). Subsequent submissions update the existing review; users may also delete their own review at any time. Reviews may be posted anonymously, in which case your handle is suppressed from the public display but the underlying record retains your user identifier for moderation.

Reviews must not contain personal attacks, harassment, hate speech, malware links, or content that violates the Acceptable Use Policy. We may remove any review that violates these rules.

7. Acceptable Use

You agree not to:

Use the Service for any unlawful purpose or in violation of any applicable laws;
Attempt to gain unauthorized access to any account, namespace, or part of the Service;
Publish content (in an ontology manifest, description, README, or review) that infringes third-party IP, contains personal data without lawful basis, contains credentials/secrets, embeds prompt-injection or other content designed to subvert downstream AI agents, or is otherwise unlawful, defamatory, or abusive;
Use automated means (bots, scrapers) to access the Studio, Hub, or MCP Serving in a way that imposes a disproportionate load or circumvents rate limits;
Misuse the AI Copilot to generate content that violates these Terms or applicable law;
Impersonate any person or entity (including by registering a handle calculated to mislead);
Reverse-engineer, decompile, or disassemble the Service except to the extent expressly permitted by law.

8. AI Features Disclaimer

The AI Copilot inside Studio and the tools served over MCP are provided "as is". AI-generated outputs may contain errors, hallucinations, or omissions. You are responsible for reviewing and validating any AI-assisted content before using it. We make no warranty as to the accuracy, completeness, or fitness of AI outputs for any particular purpose.

9. AI Credits, Subscriptions, and Billing

The Service is offered on Free, Pro, and Teams plans. The Pro and Teams plans are billed monthly per seat via Stripe; the Free plan is available at no charge with reduced limits.

AI Copilot usage is measured in "AI Credits", an internal accounting unit that normalizes the cost of underlying third-party model calls. Different features and models may consume different numbers of credits per request. We may update how credits are calculated to reflect changes in third-party pricing; current ratios are reflected in your profile and pricing pages.

Each plan includes a monthly AI Credit allowance.
Additional credits may be purchased separately.
Fees are non-refundable except as required by law.
We may change pricing with at least 30 days' notice for active subscribers.

9.1 Hub Add-Ons

In addition to plan fees, the Hub offers optional, à la carte paid features, all billed via Stripe:

Featured listings — a one-time charge to promote a Public ontology on the Hub homepage (US$49 / one week, US$149 / four weeks). One-time charges are non-refundable once the featured period begins.
Premium namespaces — a recurring annual subscription to own a premium @handle (US$299/year for short handles, US$199/year for word handles). Renews automatically until cancelled; cancellation stops future renewals and starts the 30-day grace described in Section 4.1.
Metered private MCP serving — overage above the free 100,000 requests/month per namespace, billed at US$5 per additional 100,000 requests to the namespace owner, as described in Section 5.5.

9.2 Overage Billing

Metered usage (currently, private MCP serving above the free tier) is aggregated over each calendar month and reported to Stripe against the namespace owner's payment method. By owning a namespace that serves private content over MCP, you authorize these usage-based charges. You are responsible for monitoring your usage; an indicative current-period figure is shown in your profile. Disputes about metered charges must be raised within 30 days of the invoice date. We may change metering rates or the free-tier allowance with at least 30 days' notice to active namespace owners.

10. Intellectual Property and DMCA

The Service, including its software, design, trademarks, and the@ontoboom curated content, is owned by the Company or its licensors. Nothing in these Terms transfers ownership of the Service to you.

If you believe content on the Hub infringes your copyright, please follow the procedure on our DMCA notice page. We will investigate and, where appropriate, remove or disable the offending content and terminate repeat infringers' accounts.

11. Termination

You may close your account at any time through your profile settings. We may suspend or terminate your access for violation of these Terms, violation of the Acceptable Use Policy, repeat infringement, or risk to the platform or other users.

On termination:

Your Studio projects and unpublished editor content are deleted within 30 days.
Public and Unlisted Hub versions you have already published remain available to honor the immutability principle described in Section 4.3, unless removed under DMCA, Acceptable Use enforcement, or your explicit request that we override that principle (which we will consider in good faith).
Your reviews remain published with the "Anonymous" label unless you delete them prior to termination.
Aggregate, anonymized usage statistics may be retained indefinitely.

12. Disclaimer of Warranties

THE SERVICE IS PROVIDED "AS IS" AND "AS AVAILABLE" WITHOUT WARRANTIES OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND NON-INFRINGEMENT. WITHOUT LIMITING THE FOREGOING, WE DO NOT WARRANT THAT THE SERVICE WILL BE UNINTERRUPTED, SECURE, OR ERROR-FREE.

13. Limitation of Liability

TO THE MAXIMUM EXTENT PERMITTED BY LAW, THE COMPANY SHALL NOT BE LIABLE FOR ANY INDIRECT, INCIDENTAL, SPECIAL, CONSEQUENTIAL, EXEMPLARY, OR PUNITIVE DAMAGES, OR ANY LOSS OF PROFITS, REVENUE, DATA, USE, GOODWILL, OR OTHER INTANGIBLE LOSSES RESULTING FROM:

Your use of or inability to use the Service;
Any unauthorized access to or use of our servers or your data;
Any errors, inaccuracies, or omissions in AI-generated content or MCP tool responses;
Any third-party content published on the Hub;
Any action a third-party AI agent takes after consuming content from the Hub or MCP Serving.

IN NO EVENT SHALL OUR AGGREGATE LIABILITY FOR ALL CLAIMS RELATED TO THE SERVICE EXCEED THE GREATER OF (A) THE AMOUNTS PAID BY YOU TO US IN THE TWELVE MONTHS PRECEDING THE CLAIM AND (B) ONE HUNDRED U.S. DOLLARS (US$100).

14. Indemnification

You agree to indemnify, defend, and hold harmless the Company and its officers, directors, employees, contractors, and agents from any claim, demand, loss, liability, damage, or expense (including reasonable attorneys' fees) arising out of or related to:

Your Content, including any Hub publication or review you submit;
Your use of the Service in violation of these Terms or the Acceptable Use Policy;
Your violation of any third-party right, including any intellectual property, publicity, confidentiality, or privacy right;
Any action taken by a downstream AI agent or third party based on Your Content.

15. Governing Law and Dispute Resolution

These Terms shall be governed by and construed in accordance with the laws of the State of Delaware, United States, without regard to its conflict of law provisions. Any dispute, claim, or controversy arising out of or related to these Terms or the Service shall be resolved exclusively in the state or federal courts located in Delaware, and you consent to the personal jurisdiction of those courts.

16. Modifications

We may modify these Terms from time to time. Material changes will be posted on this page with an updated effective date and, where the change is material to active subscribers or namespace owners, communicated by email at least 14 days before they take effect. Your continued use of the Service after the effective date constitutes acceptance of the updated Terms.

17. Contact

For questions about these Terms, please contact support.

For DMCA notices, see our DMCA page.

For the Acceptable Use Policy, see /legal/aup.

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