# AI data and infrastructure tools — The Agents Index

> Source: https://theagentsindex.com/category/ai-data-infrastructure (curated, re-verified)

Training data, labeling, datasets, model APIs, compute and vector databases for teams building with AI.

1 agent in this category, A to Z. Each name links to its answer-first markdown twin.

| Name | What it is | Pricing | API |
| --- | --- | --- | --- |
| [OpenAI Realtime API](https://theagentsindex.com/openai-realtime-api.md) | Speech-to-speech API for voice agents over WebRTC, WebSocket or SIP, with tools and MCP. | From $10/1m tokens | Yes |