Last Updated: December 21, 2025

1. Service Description

unsandbox.com provides secure code execution environments accessible via API. The service offers:

• Executions: Synchronous or asynchronous code execution across 42+ programming languages, destroyed after processing by default
• Sessions: Long-running interactive environments with terminal multiplexer support
• Services: Persistent containers with sleep/wake capability to manage concurrency allocation

Rate limits and concurrency are configurable based on pricing tier.

2. Acceptable Use

You agree to use the service only for lawful purposes. Prohibited activities include:

• Attempting to circumvent rate limits or security measures
• Unauthorized access attempts to underlying infrastructure
• Executing code that generates illegal content or facilitates illegal activities
• Cryptocurrency mining or resource-intensive operations beyond tier limits
• Denial of service attacks or deliberate service disruption
• Storing or processing illegal content
• Reverse engineering or attempting to extract service internals

3. API Keys & Payment

API Key Structure:

• Each purchase creates a public key (unsb-pk-...) and secret key (unsb-sk-...) pair
• Keys cannot be rotated - both expire together based on tier duration
• If keys are lost or compromised, you must purchase a new key pair
• You are responsible for securing your keys - we cannot recover lost keys

Payment Terms:

• Payments accepted via Stripe (credit/debit cards) and cryptocurrency (Bitcoin, Litecoin, Monero, Dogecoin)
• All sales are final - no refunds or chargebacks after key delivery
• All payments are non-refundable once API key is generated and delivered
• Cryptocurrency payments are final after required confirmations
• Keys can be funded/extended at any time before or after expiration

Cryptocurrency Quote Refund Policy (9%% Restocking Fee):

• Refund Address Required: You must provide a valid refund address when creating a quote. Refunds cannot be processed without one
• Expired Quote Payments: If you send payment after a quote expires (1 hour), you will receive a 91%% refund with a 9%% restocking fee deducted
• Underpayments: Partial payments that expire before full amount is received will be refunded at 91%% of the amount sent
• Overpayments: Excess amounts beyond the quoted price will be refunded at 91%% (9%% restocking fee on the excess only)
• Refund Timing: Refunds are processed automatically after incoming payments receive required confirmations (10 for XMR, 6 for DOGE)
• Minimum Refund Threshold: Refunds below $0.069 USD value are not economically viable and will not be processed
• No Refund After Key Delivery: Once a payment is confirmed and an API key is generated, no refunds are possible

4. Service Limits & Guarantees

Rate Limits:

• Freeloader (Tier -1): 1 execution per 42 seconds, 1 concurrent
• Paid tiers (1-32): RPM = tier × 7, concurrency increases every 4 tiers
• Example - Tier 1: 7 RPM, 1 concurrent ($7/month)
• Example - Tier 13: 91 RPM, 4 concurrent ($91/month)
• Example - Tier 32: 224 RPM, 8 concurrent ($224/month)

Service Level:

• Service provided "as-is" with reasonable uptime expectations
• No formal SLA - we make best efforts for availability
• Scheduled maintenance will be announced when possible
• We reserve right to modify or discontinue features with notice

5. Execution Environment

Executions:

• Executions can be synchronous (wait for result) or asynchronous (poll for result)
• Containers are destroyed after processing by default - no persistent state
• Code executes in isolated containers with resource limits
• Network access may be restricted or filtered
• Execution time limits apply per tier
• File system access is temporary and ephemeral

Interactive Sessions:

• Sessions provide long-running interactive environments with terminal multiplexer support
• Sessions persist state between commands within their allocated time
• Session limits and durations vary by pricing tier
• Sessions may be terminated due to inactivity or resource limits

Services:

• Services are persistent containers that can run background applications
• Services can be put to sleep to release concurrency allocation while preserving state
• Sleeping services do not count against your concurrency limit
• Services can be woken on demand to resume operation
• Service availability and limits depend on your pricing tier

6. Content & Ownership

Your Code:

• You retain all ownership of code you submit for execution
• We receive a limited license to execute your code
• Code and outputs are not permanently stored
• You are responsible for any code you execute

7. Privacy & Data

Data Collection:

• IP addresses collected for rate limiting and abuse prevention
• Email addresses optional - only for support and key delivery
• Execution requests processed and discarded (not logged permanently)
• Payment data stored only for transaction processing
• See Privacy Policy for complete details

8. Account Suspension

We reserve the right to suspend or terminate API keys for:

• Violation of these Terms of Use
• Abusive behavior or excessive resource consumption
• Fraudulent payment or chargebacks
• Illegal activities or content generation
• Security threats to service or other users

Suspended keys forfeit remaining time - no refunds for violations.

9. Disclaimers & Liability

Service Disclaimers:

• Service provided "AS-IS" without warranties of any kind
• No guarantee of code execution accuracy or reliability
• We take no liability for any damages, losses, or issues arising from service use
• Not liable for data loss, execution errors, or service interruptions
• Not responsible for content generated by user code
• Not liable for financial losses, business interruption, or consequential damages
• Use of this service is entirely at your own risk

10. Open Source

Parts of unsandbox.com infrastructure may be open-sourced. Code available at our Git repository is provided under respective open source licenses. Community contributions are welcome.

11. Modifications

We reserve the right to modify these Terms of Use at any time. Continued use of the service after modifications constitutes acceptance. Major changes will be announced via service notifications.

12. Governing Law

These terms are governed by the laws of the United States. Any disputes shall be resolved in accordance with US jurisdiction.