> For the complete documentation index, see [llms.txt](https://docs.parasail.io/parasail-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.parasail.io/parasail-docs/api-reference.md).

# API Reference

- [Authentication](https://docs.parasail.io/parasail-docs/api-reference/authentication.md): API key creation, base URLs, and authentication for the Parasail API.
- [Chat Completions](https://docs.parasail.io/parasail-docs/api-reference/chat-completions.md): OpenAI-compatible chat completions API for serverless and dedicated model inference.
- [Responses API](https://docs.parasail.io/parasail-docs/api-reference/responses-api.md): Responses API reference for multi-turn agentic workflows with tool calling on the new gateway.
- [Embeddings](https://docs.parasail.io/parasail-docs/api-reference/embeddings.md): Embeddings API for generating vector representations of text using open-source models.
- [Batch API](https://docs.parasail.io/parasail-docs/api-reference/batch-api.md): OpenAI-compatible Batch API reference for Parasail batch processing.
- [Billing API](https://docs.parasail.io/parasail-docs/api-reference/billing-api.md): Programmatically retrieve invoices, real-time month-to-date spend, and hourly or daily usage breakdowns with the Parasail Billing API.
- [Models Endpoint](https://docs.parasail.io/parasail-docs/api-reference/models-endpoint.md): List available models on the Parasail platform using the /v1/models endpoint.
- [Parameters](https://docs.parasail.io/parasail-docs/api-reference/parameters.md): Sampling parameters for the Parasail chat completions and text completions APIs.