flatkey.ai Blog
Insights, product notes, and implementation guides for teams building on AI APIs.
AI Gateway Architecture
Latest articles in AI Gateway Architecture.
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Latest articles in Base URL and SDK Migration.
Read moreCost, Billing, and Ops
Latest articles in Cost, Billing, and Ops.
Read moreEnterprise Controls and Trust
Latest articles in Enterprise Controls and Trust.
Read moreGateway Comparisons
Latest articles in Gateway Comparisons.
Read moreModel and Modality Playbooks
Latest articles in Model and Modality Playbooks.
Read moreReliability and Routing
Latest articles in Reliability and Routing.
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AI gateway KPI dashboard: SEO, Product, and Revenue Signals
A practical architecture guide for building an AI gateway KPI dashboard that joins SEO demand, product activation, routing reliability, cost, revenue, and evidence freshness.

AI API Prepaid Balance Management: Recharge Records, Alerts, and Finance Review
A practical cost-ops guide for controlling prepaid AI API balance with recharge records, low-balance alerts, auto-recharge rules, and finance review.

Per-Customer AI Usage Metering: Build Billing Evidence for Embedded AI Features
A practical cost-ops guide for turning embedded AI usage into customer-level billing evidence, from metadata to dispute packets.

LLM Cost Tracking by Environment: Separate Dev, Staging, Production, and Customer Traffic
A practical cost-ops guide for separating dev, staging, production, and customer AI API traffic before it reaches the invoice.

AI API Gateway Evaluation Matrix: 25 Questions Before You Move Model Traffic
A 25-question AI API gateway evaluation matrix for testing routing, keys, logs, cost evidence, support, privacy, and rollback before model traffic moves.

LiteLLM Proxy Operations Cost: Hidden Work Behind a Self-Hosted LLM Gateway
A practical worksheet for comparing LiteLLM proxy operations cost with managed AI API gateway ownership.

OpenRouter Direct Provider Accounts vs a Gateway: When One Key Reduces Invoice Sprawl
A practical comparison of OpenRouter, direct provider accounts, and gateway operations for teams trying to reduce API key and invoice sprawl.

AI Gateway Alternatives: Evaluation Matrix for Hosted, Self-Hosted, and Provider-Native Options
Compare AI gateway alternatives by operating model, provider access, base URL migration, billing, quotas, logs, routing, and operational ownership.

CrewAI OpenAI-Compatible Router: One Key for Multi-Agent Workflows
Configure CrewAI with an OpenAI-compatible router through Flatkey, then verify base_url, model routes, tools, logs, costs, and rollback.

LangGraph Multi-Model Routing: Gateway Checks for Agent Workflows
Route LangGraph agent nodes across models through Flatkey, with gateway checks for budgets, tools, retries, logs, and rollback.

OpenCode OpenAI compatible provider setup: Route coding-agent models through Flatkey
Configure OpenCode with a custom OpenAI-compatible provider through Flatkey, then verify the base URL, model selection, logs, and rollback path.

Windsurf OpenAI compatible API setup: Route coding-agent traffic through one key
Route OpenAI-compatible app and SDK calls from Windsurf-driven projects through Flatkey without assuming a native Windsurf provider screen.

Cursor OpenAI Compatible API Setup: Base URL, Model Names, and Usage Logs
Set up a Cursor OpenAI compatible API path carefully: verify base URL support, model names, usage logs, BYOK policy, and rollback before routing traffic.

Multi-Model SDK Migration: Keep OpenAI Clients for Claude, Gemini, and DeepSeek
Plan a multi-model SDK migration that keeps OpenAI clients while testing Claude, Gemini, DeepSeek, tools, streaming, billing, and rollback.

7 Migration Tests Before Changing an AI API Base URL
A seven-step checklist for testing auth, model routing, chat completions, SDK parity, streaming, tool calling, usage, quota, and rollback before changing an AI API base URL.

OpenAI-Compatible Model Names: Avoid Alias, Provider, and Version Mistakes
A practical checklist for verifying OpenAI-compatible model names, provider model IDs, Flatkey aliases, endpoint families, and version policies before migration.

OpenAI-Compatible API Troubleshooting: Fix 401s, Model Names, Streaming, and Base URLs
A practical debug path for OpenAI-compatible API 401s, model-name errors, streaming/SSE failures, base URL mistakes, and billing readback.

One API Key for Multiple AI Models: Migration Checks Before You Switch
Verify base URL, SDK config, model aliases, usage logs, quotas, billing proof, and rollback before switching to one key for multiple AI models.
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