# Marcel > Autonomous AI for business, with a prepaid multi-provider routing API. All resources below are public and readable without JavaScript. Operational API calls still require a Marcel API key. ## Website - [Marcel](https://marcel-agent.com/): Business agent overview. - [Marcel in plain text](https://marcel-agent.com/index.md) ## Router - [Routing guide](https://marcel-agent.com/routing.md) - [Complete API documentation](https://marcel-agent.com/docs.md): All routing operations, examples, errors, and schemas. - [Public OpenAPI YAML](https://marcel-agent.com/openapi.yaml) - [Live public catalog](https://marcel-agent.com/api/catalog): Enabled models, pricing and capabilities. - [Full text bundle](https://marcel-agent.com/llms-full.txt) API base URL: https://marcel-agent.com/api/v1. Authentication: Authorization: Bearer YOUR_MARCEL_API_KEY. Do not request or expose private credentials.