Sources fetched Oct 14, 2026

OpenAI API: OpenAI Spend limits guide <https://developers.openai.com/api/docs/guides/spend-limits>
OpenAI API: OpenAI Rate limits (usage tiers) <https://platform.openai.com/docs/guides/rate-limits>
Anthropic (Claude) API: Anthropic API rate limits & spend limits <https://docs.anthropic.com/en/api/rate-limits>
Google Gemini API / AI Studio: Gemini API billing <https://ai.google.dev/gemini-api/docs/billing>
Google Gemini API / AI Studio: Gemini API rate limits <https://ai.google.dev/gemini-api/docs/rate-limits>
Firebase: Firebase spend caps docs <https://firebase.google.com/docs/projects/billing/spend-caps>
Firebase: Firebase: Avoid surprise bills <https://firebase.google.com/docs/projects/billing/avoid-surprise-bills>
Firebase: Firebase blog: Introducing spend caps (Sept 14, 2026) <https://firebase.blog/posts/2026/09/firebase-spend-caps/>
Firebase: Google Cloud: API key best practices <https://cloud.google.com/docs/authentication/api-keys-best-practices>
Google Cloud (general): Disable billing usage with notifications <https://cloud.google.com/billing/docs/how-to/disable-billing-with-notifications>
Google Cloud (general): Create, edit, or delete budgets <https://cloud.google.com/billing/docs/how-to/budgets>
AWS: Managing costs with AWS Budgets <https://docs.aws.amazon.com/cost-management/latest/userguide/budgets-managing-costs.html>
AWS: Configuring budget actions <https://docs.aws.amazon.com/cost-management/latest/userguide/budgets-controls.html>
AWS: Choosing a plan (Free vs Paid) <https://docs.aws.amazon.com/awsaccountbilling/latest/aboutv2/free-tier-plans.html>
Microsoft Azure: Azure spending limit <https://learn.microsoft.com/en-us/azure/cost-management-billing/manage/spending-limit>
Microsoft Azure: Create and manage budgets <https://learn.microsoft.com/en-us/azure/cost-management-billing/costs/tutorial-acm-create-budgets>
Vercel: Vercel Spend Management <https://vercel.com/docs/spend-management>
Netlify: Netlify: How credits work <https://docs.netlify.com/manage/accounts-and-billing/billing/billing-for-credit-based-plans/how-credits-work/>
Netlify: Netlify pricing <https://www.netlify.com/pricing/>
Cloudflare Workers / R2: Workers pricing (custom CPU limits) <https://developers.cloudflare.com/workers/platform/pricing/>
Cloudflare Workers / R2: Budget alerts <https://developers.cloudflare.com/billing/manage/budget-alerts/>
Cloudflare Workers / R2: Changelog: budget alerts on by default <https://developers.cloudflare.com/changelog/post/2026-06-15-budget-alerts-default-on/>
Cloudflare Workers / R2: Workers limits <https://developers.cloudflare.com/workers/platform/limits/>
Cloudflare Workers / R2: R2 pricing <https://developers.cloudflare.com/r2/pricing/>
Supabase: Supabase: Control your costs (Spend Cap) <https://supabase.com/docs/guides/platform/cost-control>
Replicate: Replicate prepaid credit <https://replicate.com/docs/topics/billing/prepaid-credit>
Replicate: Replicate billing <https://replicate.com/docs/topics/billing>
Railway: Railway cost control / usage limits <https://docs.railway.com/pricing/cost-control>
Render: Render build pipeline (spend limit) <https://render.com/docs/build-pipeline>
Render: Render free instances <https://render.com/docs/free>
Fly.io: Fly.io cost management <https://fly.io/docs/about/cost-management/>
Fly.io: Fly.io billing <https://fly.io/docs/about/billing/>
GitHub Actions / Codespaces: GitHub: Set up budgets <https://docs.github.com/en/billing/tutorials/set-up-budgets>
GitHub Actions / Codespaces: GitHub Codespaces billing <https://docs.github.com/en/billing/concepts/product-billing/github-codespaces>
Emergency: AWS: Manage access keys (delete/rotate) <https://docs.aws.amazon.com/IAM/latest/UserGuide/id_credentials_access-keys.html>
Emergency: AWS Support: create a case <https://docs.aws.amazon.com/awssupport/latest/user/case-management.html>
Emergency: Google Cloud: API key best practices <https://cloud.google.com/docs/authentication/api-keys-best-practices>
Emergency: Google Cloud: Disable billing with notifications <https://cloud.google.com/billing/docs/how-to/disable-billing-with-notifications>
Emergency: Vercel Spend Management (pause projects) <https://vercel.com/docs/spend-management>
Emergency: OpenAI Spend limits <https://developers.openai.com/api/docs/guides/spend-limits>