MockHero is a synthetic test data API that generates realistic, relational fake data for developers. It supports 156 field types, 22 locales, and outputs JSON, CSV, or SQL.

How do I generate test data with MockHero?

Send a POST request to /api/v1/generate with a JSON schema describing your tables and fields. You can also use plain English prompts or pre-built templates for common schemas like ecommerce, blog, or SaaS.

What field types does MockHero support?

MockHero supports 156+ field types including uuid, email, full_name, phone, address, company, credit_card, iban, ip_address, url, date, timestamp, price, latitude, longitude, color, avatar, paragraph, and many more.

Does MockHero support relational data?

Yes. Use ref fields to create foreign key relationships between tables. MockHero generates referentially consistent data across all related tables.

Can I use MockHero with AI coding agents?

Yes. MockHero provides an MCP (Model Context Protocol) server that works with Claude Desktop, Claude Code, Cursor, and other AI-powered development tools. Install it via npx @mockherodev/mcp-server.

Yes. The free tier includes 1,000 records/day, 100 records/request, all 156 field types, all 22 locales, and JSON output. Paid plans start at $19/month for higher limits and additional output formats.

What output formats does MockHero support?

MockHero outputs JSON (all plans), CSV (Pro and Scale), and SQL with dialect support for PostgreSQL, MySQL, and SQLite (Pro and Scale).

What locales does MockHero support?

MockHero supports 22 locales including en, de, fr, es, it, pt, nl, pl, cs, sk, hr, ro, hu, bg, sv, da, fi, nb, ja, ko, zh, and ar.

Terms of Service

These Terms of Service govern your use of the website located at https://mockhero.dev and any related services provided by Space Cadet d.o.o.

By accessing https://mockhero.dev, you agree to abide by these Terms of Service and to comply with all applicable laws and regulations. If you do not agree with these Terms of Service, you are prohibited from using or accessing this website or using any other services provided by Space Cadet d.o.o.

We, Space Cadet d.o.o., reserve the right to review and amend any of these Terms of Service at our sole discretion. Upon doing so, we will update this page. Any changes to these Terms of Service will take effect immediately from the date of publication.

These Terms of Service were last updated on March 22, 2026.

Limitations of Use

By using this website, you warrant on behalf of yourself, your users, and other parties you represent that you will not:

modify, copy, prepare derivative works of, decompile, or reverse engineer any materials and software contained on this website;
remove any copyright or other proprietary notations from any materials and software on this website;
transfer the materials to another person or “mirror” the materials on any other server;
knowingly or negligently use this website or any of its associated services in a way that abuses or disrupts our networks or any other service Space Cadet d.o.o. provides;
use this website or its associated services to transmit or publish any harassing, indecent, obscene, fraudulent, or unlawful material;
use this website or its associated services in violation of any applicable laws or regulations;
use this website in conjunction with sending unauthorized advertising or spam;
harvest, collect, or gather user data without the user's consent; or
use this website or its associated services in such a way that may infringe the privacy, intellectual property rights, or other rights of third parties.

Intellectual Property

The intellectual property in the materials contained in this website are owned by or licensed to Space Cadet d.o.o. and are protected by applicable copyright and trademark law. We grant our users permission to download one copy of the materials for personal, non-commercial transitory use.

This constitutes the grant of a license, not a transfer of title. This license shall automatically terminate if you violate any of these restrictions or the Terms of Service, and may be terminated by Space Cadet d.o.o. at any time.

User-Generated Content

You retain your intellectual property ownership rights over content you submit to us for publication on our website. We will never claim ownership of your content, but we do require a license from you in order to use it.

When you use our website or its associated services to post, upload, share, or otherwise transmit content covered by intellectual property rights, you grant to us a non-exclusive, royalty-free, transferable, sub-licensable, worldwide license to use, distribute, modify, run, copy, publicly display, translate, or otherwise create derivative works of your content in a manner that is consistent with your privacy preferences and our Privacy Policy.

The license you grant us can be terminated at any time by deleting your content or account. However, to the extent that we (or our partners) have used your content in connection with commercial or sponsored content, the license will continue until the relevant commercial or post has been discontinued by us.

You give us permission to use your username and other identifying information associated with your account in a manner that is consistent with your privacy preferences and our Privacy Policy.

Liability

Our website and the materials on our website are provided on an ‘as is’ basis. To the extent permitted by law, Space Cadet d.o.o. makes no warranties, expressed or implied, and hereby disclaims and negates all other warranties including, without limitation, implied warranties or conditions of merchantability, fitness for a particular purpose, or non-infringement of intellectual property, or other violation of rights.

In no event shall Space Cadet d.o.o. or its suppliers be liable for any consequential loss suffered or incurred by you or any third party arising from the use or inability to use this website or the materials on this website, even if Space Cadet d.o.o. or an authorized representative has been notified, orally or in writing, of the possibility of such damage.

In the context of this agreement, “consequential loss” includes any consequential loss, indirect loss, real or anticipated loss of profit, loss of benefit, loss of revenue, loss of business, loss of goodwill, loss of opportunity, loss of savings, loss of reputation, loss of use and/or loss or corruption of data, whether under statute, contract, equity, tort (including negligence), indemnity or otherwise.

Because some jurisdictions do not allow limitations on implied warranties, or limitations of liability for consequential or incidental damages, these limitations may not apply to you.

Accuracy of Materials

The materials appearing on our website are not comprehensive and are for general information purposes only. Space Cadet d.o.o. does not warrant or make any representations concerning the accuracy, likely results, or reliability of the use of the materials on this website, or otherwise relating to such materials or on any resources linked to this website.

Links

Space Cadet d.o.o. has not reviewed all of the sites linked to its website and is not responsible for the contents of any such linked site. The inclusion of any link does not imply endorsement, approval or control by Space Cadet d.o.o. of the site. Use of any such linked site is at your own risk and we strongly advise you make your own investigations with respect to the suitability of those sites.

Additional Terms for MockHero Services

Account Registration. To access certain features of the Service, you must create an account. You agree to: (a) provide accurate, current, and complete information during registration; (b) maintain the security of your account credentials and not share them with any third party; (c) promptly update your account information if it changes; and (d) accept responsibility for all activities that occur under your account. You must notify us immediately at hello@mockhero.dev if you become aware of any unauthorized use of your account. We reserve the right to suspend or terminate accounts that contain inaccurate information or that we reasonably believe have been compromised.

API Keys and Access. MockHero provides API keys to authenticate requests to our data generation service. You are responsible for safeguarding your API keys and must not share them publicly, embed them in client-side code, or expose them in version control repositories. We reserve the right to revoke API keys that are found to be compromised or used in violation of these Terms. You are responsible for all API usage associated with your keys.

Generated Data. All data generated by MockHero is entirely synthetic and fictional. It is not derived from real individuals and should not be used as a substitute for real data in production systems. You acknowledge that generated data is provided for testing, development, and demonstration purposes only. We make no warranties regarding the suitability of generated data for any specific use case.

Subscription and Payment. MockHero offers subscription plans with different pricing tiers. By subscribing to a paid plan, you agree that: (a) subscription fees are billed on a recurring monthly basis through our payment provider and are non-refundable except as described in our Refund Policy; (b) you authorize us to charge your chosen payment method for all applicable fees; (c) if a payment fails, we may suspend your access to paid features until the outstanding balance is resolved; (d) we may change our pricing upon 30 days' written notice, and your continued use of the Service after the price change takes effect constitutes acceptance of the new pricing; and (e) you may upgrade, downgrade, or cancel your subscription at any time, with changes taking effect at the end of your current billing period.

Rate Limits and Fair Use. Each subscription tier includes specific rate limits and usage quotas. You agree not to circumvent these limits through any means, including but not limited to creating multiple accounts, rotating API keys, or using automated tools designed to bypass rate limiting. We reserve the right to throttle or suspend access for accounts that exhibit abusive usage patterns.

Service Modifications and Availability. We reserve the right to modify, update, or discontinue any part of the Service at any time, with or without notice, including changes to features, API endpoints, field types, and output formats. We do not guarantee uninterrupted or error-free availability and shall not be liable for downtime or service interruptions caused by maintenance, updates, or factors beyond our reasonable control.

Communications. By creating an account, you consent to receive service-related communications via email, including account notifications, usage alerts, billing confirmations, and API status updates. These are necessary for the operation of the Service. You may manage your notification preferences in your account settings. Marketing communications such as newsletters require separate opt-in and you may unsubscribe at any time.

Prohibited Uses. You may not use the MockHero API to: (a) generate data for the purpose of deceiving or defrauding others; (b) create synthetic identities for illegal purposes; (c) simulate real individuals without their consent; (d) overwhelm or attack third-party systems with generated data; or (e) resell or redistribute generated data as a competing data generation service.

Related Policies. The following policies form part of these Terms of Service and are incorporated by reference: our Privacy Policy and Refund Policy, all available at https://mockhero.dev.

Right to Terminate

We may suspend or terminate your right to use our website and terminate these Terms of Service immediately upon written notice to you for any breach of these Terms of Service.

Severance

Any term of these Terms of Service which is wholly or partially void or unenforceable is severed to the extent that it is void or unenforceable. The validity of the remainder of these Terms of Service is not affected.

Governing Law

These Terms of Service are governed by and construed in accordance with the laws of Croatia. You irrevocably submit to the exclusive jurisdiction of the courts in that State or location.