All Articles
When Your Claude API Retry Logic Made Rate Limits Worse — The Retry-After Header You Forgot to Read
If 429 errors went up after you added retry logic to your Claude API client, the cause is almost always the same: ignoring the Retry-After header and using exponential backoff without jitter. Here is how to diagnose and fix it.
Claude API Telemetry on ClickHouse: A Production Guide to Cost, Latency, and Error Analytics
Stream per-request Claude API telemetry into ClickHouse, build sub-second dashboards with materialized views, and detect cost spikes, retry loops, and silent failures with practical SQL recipes.
Fix Claude API's 'messages.X.role must alternate' in One Minute — Common 400 invalid_request_error Patterns
A pattern-by-pattern guide to fixing the 'messages.X.role must alternate' error in Claude's Messages API — covering user/assistant alternation, tool_use and tool_result pairing, and history-trimming pitfalls with working code.
Building a Production Multilingual Translation SaaS with Claude API — Glossaries, Style, and Domain Adaptation in Practice
A practical, code-first design guide for running a translation SaaS on Claude API: glossaries, style guides, domain adaptation, quality gates, and cost controls that survive real production traffic.
Building a Production Claude API Pipeline on Cloudflare Queues: Fault Tolerance, Backpressure, and Cost Control
A practical, code-first walkthrough for routing Claude API calls through Cloudflare Queues — covering producer/consumer code, retry-vs-DLQ branching, priority lanes, and token budgeting for production workloads.
Infrastructure Requirements for Claude API Deployment: Sizing, SLA, and Compliance Decisions Before Production
Your prototype works. But what does 'production-ready' actually mean? This guide walks through how to derive infrastructure requirements from traffic, SLA, and data-residency decisions — with concrete numbers and a sizing formula.
Production Semantic Cache for Claude API — Similarity Thresholds, Pollution Defense, and What to Track
A production playbook for adding a semantic cache in front of Claude API — threshold tuning, multi-tenant isolation, pollution prevention, fallbacks, and the metrics that actually prove it works.
Don't Send PII to Claude — A Production-Ready Masking Pipeline You Can Actually Defend in Review
Design and implementation of a PII masking pipeline you can ship in front of Claude API. Covers reversible vs irreversible masking, multi-turn token consistency, and continuous leak-rate measurement with golden datasets — all with working TypeScript code.
Why "The requested model does not exist" Won't Go Away — Claude API Naming and Access Pitfalls
The model_not_found error in the Claude API is almost always a typo or a stale model alias — not a permissions issue. Here are the current model IDs as of April 2026 and a clear order for narrowing down the cause.
Four Infrastructure Levers That Cut Claude API Latency Before You Touch the Model
Before you downgrade Sonnet to Haiku to chase faster responses, the network and request shape around your Claude API calls usually has more headroom. Here are four infrastructure levers — region selection, connection pooling, prompt caching, and streaming — with code and measurement notes.
Claude API × Inngest — Durable AI Workflows with Retries, Idempotency, and Human Approval
A production-grade pattern for combining Claude API with Inngest. Build TypeScript-first durable AI workflows that retry safely, stay idempotent, gate dangerous calls behind human approval, and run on Vercel or Cloudflare Workers.
Building a Recurring Billing SaaS with Claude API and Stripe — From Architecture to Production
A complete architecture guide for building a SaaS product powered by Claude API with Stripe recurring billing. Covers usage metering, tiered pricing, webhook handling, and production deployment patterns.