Compare AI API Providers Serving China

# Python example with OpenAI SDK

from openai import OpenAI

client = OpenAI(

    api_key="your-relay-api-key",

    base_url="https://api.relay-station.com/v1",

)

# Confirm model IDs and supported features in the platform docs

What is a third-party AI API provider?

These services offer access to AI models through their own endpoints, rather than a direct account with the model developer. Some support access from China and local payments. Check the exact model, routing and billing terms with each provider.

Can I use my existing API integration?

Many providers offer OpenAI-compatible endpoints. Start with the base_url and API key, then check model IDs, streaming, tool use and image endpoints against the provider's documentation. Compatibility does not establish that the underlying model or service quality is identical.

Which provider lists the most models?

ProAI API has the most LLM models in this directory (584). Model count is not a price ranking; each minimum may refer to a different model. Check collection dates and the provider before purchasing.

What should I check before paying?

A directory listing is not a reliability or security endorsement. Requests pass through a third party: check its data handling policy, exact model IDs, billing unit and refund terms. Use a small paid test before committing a production workload, and do not send sensitive data without reviewing the provider's terms.