Engineering notes, AI news with sources, guides, tutorials and product updates from Relaykit.https://oneaiapikey.comen-usFri, 16 Oct 2026 07:19:00 GMThttps://oneaiapikey.com/resources/low-balance-alerts-email-and-signed-webhookshttps://oneaiapikey.com/resources/low-balance-alerts-email-and-signed-webhooksPick an alert level from your real daily spend, choose email or a webhook, and run a small signed receiver in Node or Python that you can test with curl.Fri, 09 Oct 2026 00:00:00 GMTTutorialsalertswebhookscost-controlpythonnodehttps://oneaiapikey.com/resources/agent-kits-and-free-tools-are-livehttps://oneaiapikey.com/resources/agent-kits-and-free-tools-are-liveStep-by-step setups for eight coding agents at /agents, and three free browser tools at /tools: a cost calculator, a config generator and a token estimator.Thu, 08 Oct 2026 00:00:00 GMTProduct Updatesagent-kitstoolscoding-agentsproduct-updatehttps://oneaiapikey.com/resources/anthropic-messages-format-through-compatible-gatewayhttps://oneaiapikey.com/resources/anthropic-messages-format-through-compatible-gatewayCall Claude through a gateway with the Anthropic SDKs: base URL, headers, streaming, a tool-use loop and prompt caching, in Python, Node and curl.Thu, 08 Oct 2026 00:00:00 GMTTutorialsanthropicclaudemessages-apitool-useprompt-cachingpythonnodehttps://oneaiapikey.com/resources/api-key-security-for-ai-appshttps://oneaiapikey.com/resources/api-key-security-for-ai-appsLLM API keys spend real money. How to keep them out of browsers and git, scope one key per app, rotate without downtime, rate-limit users and respond to a leak.Thu, 08 Oct 2026 00:00:00 GMTGuidesSecurityAPI keysBest practiceshttps://oneaiapikey.com/resources/claude-5-5-family-opus-sonnet-haikuhttps://oneaiapikey.com/resources/claude-5-5-family-opus-sonnet-haikuAnthropic shipped Opus 5.5, Sonnet 5.5 and Haiku 5.5 between September 22 and October 7. Prices, limits and the breaking changes that affect your code.Thu, 08 Oct 2026 00:00:00 GMTAI Newsanthropicclaudemodel releasesmigrationhttps://oneaiapikey.com/resources/glossary-tokens-context-windows-caching-streaming-base-urlshttps://oneaiapikey.com/resources/glossary-tokens-context-windows-caching-streaming-base-urlsPlain-language definitions of the LLM API terms on pricing pages and in SDK docs, with a worked cost example and the mistake each term commonly causes.Thu, 08 Oct 2026 00:00:00 GMTGuidesglossarytokenscontext-windowprompt-cachingstreamingbase-urlhttps://oneaiapikey.com/resources/new-customer-console-keys-usage-billinghttps://oneaiapikey.com/resources/new-customer-console-keys-usage-billingThe console at /console now covers API keys with spend limits and expiry dates, a per-request usage log and your prepaid balance.Thu, 08 Oct 2026 00:00:00 GMTProduct Updatesconsoleapi-keysusagebillingproduct-updatehttps://oneaiapikey.com/resources/one-api-key-per-project-with-spend-limitshttps://oneaiapikey.com/resources/one-api-key-per-project-with-spend-limitsOne key per project and environment, each with a spend limit sized from real traffic, an expiry when it should end and an alert when it is blocked.Thu, 08 Oct 2026 00:00:00 GMTTutorialsapi-keyssecuritycost-controlpythonnodehttps://oneaiapikey.com/resources/stream-tokens-to-browser-server-sent-eventshttps://oneaiapikey.com/resources/stream-tokens-to-browser-server-sent-eventsRelay a streaming LLM response from your server to the browser over SSE, keep the API key server-side, stop billing when the tab closes. Node and Python code.Thu, 08 Oct 2026 00:00:00 GMTTutorialsstreamingssenodepythonfastapijavascripthttps://oneaiapikey.com/resources/switch-openai-sdk-app-to-different-base-urlhttps://oneaiapikey.com/resources/switch-openai-sdk-app-to-different-base-urlPoint a working OpenAI SDK app at another compatible endpoint with env vars or one line of code. Python, Node, curl, LangChain and the AI SDK, plus pitfalls.Thu, 08 Oct 2026 00:00:00 GMTTutorialsopenai-sdkbase-urlmigrationpythonnodecurlhttps://oneaiapikey.com/resources/openai-gpt-6-family-api-devday-2026https://oneaiapikey.com/resources/openai-gpt-6-family-api-devday-2026What OpenAI shipped to developers in September and early October 2026: four GPT-6 models, DevDay speed tiers, a Decisions API and simpler usage tiers.Wed, 07 Oct 2026 00:00:00 GMTAI Newsopenaigpt-6model releasesdevdayhttps://oneaiapikey.com/resources/xai-grok-4-7-api-releasehttps://oneaiapikey.com/resources/xai-grok-4-7-api-releasexAI shipped grok-4.7 in September 2026: 500k context, four reasoning levels, Grok 4.6 pricing and a 200k long-context price step. What to check.Wed, 07 Oct 2026 00:00:00 GMTAI Newsxaigrokmodel-releasepricingcoding-agentshttps://oneaiapikey.com/resources/openai-api-shutdowns-october-2026https://oneaiapikey.com/resources/openai-api-shutdowns-october-2026OpenAI retires a long list of older models on October 23, 2026. What is going, what replaces each one, and how to find them in your code.Mon, 05 Oct 2026 00:00:00 GMTAI Newsopenaianthropicdeprecationsmigrationhttps://oneaiapikey.com/resources/choosing-a-model-for-coding-agentshttps://oneaiapikey.com/resources/choosing-a-model-for-coding-agentsA practical way to pick models for Claude Code, Codex CLI, Cline and other coding agents: what each tier is good at, cost per agent turn, and mixing tiers.Sun, 04 Oct 2026 00:00:00 GMTGuidesCoding agentsModelsClaude CodeCosthttps://oneaiapikey.com/resources/streaming-vs-non-streaming-responseshttps://oneaiapikey.com/resources/streaming-vs-non-streaming-responsesWhy long non-streaming LLM requests time out, how streaming improves perceived speed, and working SSE code for Python and Node in OpenAI and Anthropic formats.Thu, 01 Oct 2026 00:00:00 GMTBlogStreamingSSEPythonNode.jshttps://oneaiapikey.com/resources/estimate-monthly-llm-api-costhttps://oneaiapikey.com/resources/estimate-monthly-llm-api-costA practical method to forecast LLM API spend: counting tokens, the hidden tokens people miss, how prompt caching changes the maths, and three worked examples.Sun, 27 Sep 2026 00:00:00 GMTTutorialsPricingTokensPrompt cachinghttps://oneaiapikey.com/resources/openai-vs-anthropic-compatible-apishttps://oneaiapikey.com/resources/openai-vs-anthropic-compatible-apisChat Completions and the Messages API look alike but differ in system prompts, max_tokens, tool calls, streaming events and usage fields. When it matters.Thu, 24 Sep 2026 00:00:00 GMTBlogAPIOpenAI formatAnthropic formathttps://oneaiapikey.com/resources/claude-code-custom-api-base-urlhttps://oneaiapikey.com/resources/claude-code-custom-api-base-urlPoint Claude Code at an Anthropic-compatible gateway with ANTHROPIC_BASE_URL: shell and settings.json setup, verifying with /status, model pinning and fixes.Sun, 20 Sep 2026 00:00:00 GMTTutorialsClaude CodeSetupAnthropic API