# OpenTooler > Pay-per-use tools for AI agents, available through one CLI. ## Docs - [OpenTooler](https://opentooler.ai/docs/index.md): Pay-per-use tools for AI agents, available through one CLI. - [Quickstart](https://opentooler.ai/docs/quickstart.md): Give an AI agent access to pay-per-use tools with OpenTooler. - [Discover and call tools](https://opentooler.ai/docs/guides/discover-and-call.md): Teach an AI agent to find, inspect, and safely invoke pay-per-use tools. - [Billing and safety](https://opentooler.ai/docs/guides/billing-and-safety.md): Control AI agent spending with credits, price limits, receipts, and safe recovery. - [Video transcription](https://opentooler.ai/docs/guides/video-transcription.md): Give AI agents pay-per-use transcription for supported public media. - [CLI overview](https://opentooler.ai/docs/cli/overview.md): The stable CLI interface that connects AI agents to pay-per-use tools. - [Authentication](https://opentooler.ai/docs/cli/authentication.md): Authenticate local and unattended AI agents securely. - [Tool commands](https://opentooler.ai/docs/cli/tools.md): Commands AI agents use to discover, price, and call tools. - [Invocations and billing](https://opentooler.ai/docs/cli/invocations-and-billing.md): Track AI agent tool calls and control prepaid spending. - [Configuration and troubleshooting](https://opentooler.ai/docs/cli/configuration.md): Configure reliable OpenTooler execution for AI agents.