# Product.ai MCP > One MCP server for developers who build AI agents: verified product truth and promo codes SimplyCodes tested at real checkouts. Endpoint https://mcp.product.ai/mcp (streamable HTTP). Authenticate with OAuth, or send a pai_ API key as Authorization: Bearer. A person makes keys in a browser at https://auth.product.ai/account/keys; scripts cannot create them. ## Docs - [Full docs as Markdown](https://developers.product.ai/llms-full.txt): everything below in one file, with every tool's input schema. - [Quickstart](https://developers.product.ai/index.md): connect a client, choose OAuth or a key, make a first call. - [Tool catalog](https://developers.product.ai/tools.json): the seven tools as JSON, from the registry tools/list serves. ## Tools - [axioms_ground](https://developers.product.ai/#tool-axioms_ground): Ground in a category. Scope `fact_checking`. - [axioms_check](https://developers.product.ai/#tool-axioms_check): Check a claim. Scope `fact_checking`. - [axioms_resolve_checkout](https://developers.product.ai/#tool-axioms_resolve_checkout): Resolve a checkout. Scope `promo_codes`. - [verify_promo_code](https://developers.product.ai/#tool-verify_promo_code): Verify one promo code. Scope `promo_codes`. - [get_merchant_codes](https://developers.product.ai/#tool-get_merchant_codes): Get verified codes for one merchant. Scope `promo_codes`. - [get_merchant_verification](https://developers.product.ai/#tool-get_merchant_verification): Get one merchant's verification record. Scope `promo_codes`. - [report_code_outcome](https://developers.product.ai/#tool-report_code_outcome): Report a code outcome. Scope `promo_codes`. ## Optional - [Protected-resource metadata](https://mcp.product.ai/.well-known/oauth-protected-resource): RFC 9728 discovery for OAuth clients. - [server.json](https://mcp.product.ai/server.json): the MCP server card.