Field notes from Braid

Guides to AI API costs,usage and security.

Step-by-step help for teams building on AI APIs: estimating what an app will cost, tracking usage by feature and provider, reporting it, and keeping keys safe. Written by the team that builds Braid.

CostsHow to estimate what your AI app will cost to runHow to estimate the API cost of an AI app per user and per month before launch, and how to check the estimate against real usage once it's live.7-minute read

ReportingHow to track AI usage across OpenAI, Anthropic and Gemini7-minute read

SecurityOpenAI API key security: best practices and leak response7-minute read

CostsWhy is my OpenAI API bill so high? How to find out7-minute read

CostsHow to see OpenAI API costs by project, key and model5-minute read

SetupHow to organize OpenAI projects and API keys7-minute read

SetupHow to use the OpenAI Usage and Costs API, with examples6-minute read

ReportingWhy your OpenAI usage doesn't match your invoice5-minute read

ReportingHow to track AI API costs per feature, team or customer5-minute read

ReportingHow to report AI spending to your team each week6-minute read

CostsOpenAI reasoning tokens: what they are and what they cost5-minute read

SecurityHow to create a read-only OpenAI Admin API key5-minute read

SetupHow to set up OpenAI API spend alerts and limits7-minute read