API Terms of Use Template
An API Terms of Use document (sometimes called Developer Terms or API License Agreement) governs how third-party developers and businesses may access and use your API. It differs from a general SaaS ToS in important ways: your API users are typically developers building products that will in turn serve end users, creating an indirect relationship where your API's terms cascade downstream. The API ToS must define both what developers can build and what their end users may do through those applications.
Rate limiting and fair use provisions are central to API terms. Specify request limits per second, per minute, per day, and per month. Define what constitutes abuse — automated scraping of all available data, using multiple API keys to circumvent limits, or building services that compete directly with your platform. Rate limit terms create the legal basis for suspending or throttling API access when limits are exceeded.
Attribution and branding requirements matter if your data or functionality will be visible to end users through third-party apps. Many API providers require "Powered by [Name]" attribution or prohibit modifying the presentation of data in ways that obscure its origin. Be precise about where and how attribution must appear.
Data rights are the most commercially sensitive section. Address: whether developers can cache your API responses and for how long, whether they can store user data retrieved from your API, whether they can resell or redistribute API data, and whether they can train machine learning models on your data. Each decision has major commercial implications and must be explicitly addressed.
Prohibited use cases typically include: building competing products, reverse engineering your API to infer proprietary algorithms, using the API for illegal activities, and high-volume data extraction beyond normal application use patterns. Be specific rather than vague — overly broad prohibitions are difficult to enforce and may deter legitimate use cases.
API versioning and deprecation policy is often overlooked but critically important for developer trust. State how much advance notice you will give before deprecating an API version (industry standard is 6–12 months for major versions), how you will communicate breaking changes, and whether deprecated endpoints will continue working for a grace period.
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{"businessType":"api","hasRateLimits":true,"hasDataRights":true,"requiresAttribution":true,"hasDeprecationPolicy":true,"limitationOfLiability":true}Customize this template with your own details using the free generator:
▸Open in GeneratorFAQ
- Can I require API users to agree to terms without a click-wrap agreement?
- Browsewrap — where terms are posted and access constitutes acceptance — is less enforceable than click-wrap in most jurisdictions. For your API, require explicit acceptance during the developer registration and key issuance process: a checkbox, an "I accept" button, or electronic signature. For programmatic access, requiring developers to confirm acceptance via the registration portal before receiving API keys satisfies this.
- What should my API deprecation notice period be?
- The industry standard for external, public APIs is 6 months minimum for minor versions and 12 months for major versions. If your API has enterprise customers with SLAs, you may need to commit to longer periods contractually. Some providers (Google, Stripe) give years of notice for major deprecations. State your minimum notice period in the terms so developers can plan accordingly.
- Can I prohibit developers from training AI models on my API data?
- Yes, you can include this prohibition in your API terms, and many data providers now do. However, enforceability varies — you need technical measures (rate limits, monitoring) alongside legal terms. Specify clearly: no training of machine learning or AI models on data retrieved through the API, no using API responses as training datasets, and no feeding API outputs into models for the purpose of replicating your service.