# ClearTrust Publication Network > Free knowledge, read by real people. Designed for humans and AI agents alike. A network of free, openly licensed (CC BY 4.0) websites published by ClearTrust, written with AI from named sources and funded by advertising screened for invalid traffic. ## Publications - [Glassbox](https://glassbox.how): One interactive explainer a day: open the box and see how it works. - [Mela](https://mela-production-2c05.up.railway.app): Every festival on Earth, by country and city. - [Kabila](https://kabila.cleartrust.cc): The indigenous and tribal peoples of the world, one by one. - [Thali](https://thali.cleartrust.cc): Every food in the world, plate by plate. - [AdTech Sumo](https://adtechsumo.com): Ad tech, programmatic and invalid traffic, explained in plain English. - [The Arbitrage Desk](https://arbitragedesk-production.up.railway.app): Search arbitrage, from the first click to the last cent. ## About the network - [Principles](https://cpn.cleartrust.cc/principles): licence, attribution, use of AI, advertising - [About](https://cpn.cleartrust.cc/about) ## Advertising - [Advertise](https://cpn.cleartrust.cc/advertise) - [Where ads appear](https://cpn.cleartrust.cc/advertise/placements): every placement, with sizes - [Why IVT-free matters](https://cpn.cleartrust.cc/advertise/why-ivt-free) - [Become a partner](https://cpn.cleartrust.cc/partners) ## For AI agents - [How agents can use the network](https://cpn.cleartrust.cc/agents) - MCP server (Streamable HTTP, no key): https://cpn.cleartrust.cc/mcp - [Publications as JSON](https://cpn.cleartrust.cc/api/publications.json)