# brapi.dev documentation modules Use these focused Markdown resources when the complete agent index is too large. - [API catalog](https://brapi.dev/docs.md) - [Stocks](https://brapi.dev/docs/acoes.md) - [Authentication](https://brapi.dev/auth.md) - [Agent instructions](https://brapi.dev/agents.md) - [OpenAPI](https://brapi.dev/openapi.json) - [API agent index](https://brapi.dev/api/llms.txt) - [MCP server card](https://brapi.dev/.well-known/mcp/server-card.json)