> ## Documentation Index
> Fetch the complete documentation index at: https://docs.rockapi.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# For buyers

> Guides for API buyers who need to choose services, manage subscriptions, control costs, and protect API keys.

# For buyers

Use these guides when you evaluate AI model APIs, subscribe to OpenAPI services, compare gateways, control costs, and operate third-party APIs through Rock API.

<Columns cols={2}>
  <Card title="DeepSeek V4 API at 0.7x" icon="clock-3" href="/blog/buyers/deepseek-v4-api-70-off">
    Compare V4 Pro and V4 Flash peak and off-peak rates, with 30% savings in both periods.
  </Card>

  <Card title="Alibaba Qwen models at 0.7x" icon="badge-percent" href="/blog/buyers/alibaba-qwen-api-70-off">
    Save 30% on every currently listed Qwen model through Alibaba's official model-service channel.
  </Card>

  <Card title="AI API gateway" icon="route" href="/blog/buyers/ai-api-gateway">
    Learn how one OpenAI-compatible interface can centralize model access, API keys, billing, and marketplace workflows.
  </Card>

  <Card title="Cheap AI API" icon="badge-percent" href="/blog/buyers/cheap-ai-api">
    Compare token pricing, gateway options, and practical ways to reduce LLM API spend.
  </Card>

  <Card title="OpenAI-compatible API" icon="code" href="/blog/buyers/openai-compatible-api">
    Migrate Python, Node.js, and curl clients by changing the base URL and API key.
  </Card>

  <Card title="AI model API comparison" icon="brain-circuit" href="/blog/buyers/ai-model-api-comparison">
    Compare GPT, Claude, and Gemini model APIs for production applications.
  </Card>

  <Card title="OpenRouter alternatives" icon="git-compare" href="/blog/buyers/openrouter-alternatives">
    Compare OpenRouter, LiteLLM, Portkey, and Rock API by cost, setup, catalog, and operations.
  </Card>

  <Card title="API marketplace guide" icon="store" href="/blog/buyers/api-marketplace-guide">
    Learn how developers discover, compare, subscribe to, and test APIs before production use.
  </Card>

  <Card title="AI Translate usage" icon="languages" href="/blog/buyers/ai-translate-usage-openapi-market">
    Read the 7-day usage view for AI Translate and evaluate calls, error rate, and latency before production.
  </Card>

  <Card title="AI Translate character pricing" icon="badge-dollar-sign" href="/blog/buyers/ai-translate-character-pricing">
    Compare plans from \$0.15 per million included characters with Google Cloud NMT pricing.
  </Card>

  <Card title="AI translation API workflows" icon="captions" href="/blog/buyers/ai-translation-api-for-multilingual-products">
    Watch the AI Translate overview and plan multilingual product content, support, and automation workflows.
  </Card>

  <Card title="Recharge with Alipay" icon="wallet-cards" href="/blog/buyers/recharge-with-alipay">
    Add prepaid balance with Alipay before subscribing to APIs or sending production traffic.
  </Card>

  <Card title="API integration best practices" icon="workflow" href="/blog/buyers/api-integration-best-practices">
    Reduce integration cost, handle errors, manage rate limits, and move safely to production.
  </Card>

  <Card title="AI API security and privacy" icon="shield-check" href="/blog/buyers/ai-api-security-privacy">
    Review prompt privacy, API key management, data retention, and production security questions.
  </Card>

  <Card title="Subscribe to and test an OpenAPI" icon="play-circle" href="/blog/buyers/how-to-subscribe-and-test-openapi">
    Follow the buyer workflow for subscribing to an OpenAPI service and testing requests online before integration.
  </Card>

  <Card title="Choose an API provider" icon="list-checks" href="/blog/buyers/choose-an-api-provider">
    Review reliability, documentation, pricing, support, and operational fit before you subscribe.
  </Card>

  <Card title="Reduce API integration costs" icon="chart-no-axes-column-decreasing" href="/blog/buyers/reduce-api-integration-costs">
    Find the hidden cost drivers in API usage and reduce spend without breaking your application.
  </Card>

  <Card title="API subscription checklist" icon="clipboard-check" href="/blog/buyers/api-subscription-checklist">
    Use a practical checklist before moving an API subscription into production.
  </Card>

  <Card title="Secure API key management" icon="key-round" href="/blog/buyers/secure-api-key-management">
    Protect credentials, rotate keys, and keep access scoped to the right applications.
  </Card>
</Columns>

## Related docs

* [Quickstart](/quickstart)
* [Authentication](/authentication)
* [Pricing and billing](/pricing-and-billing)
* [Security and privacy](/security-and-privacy)