FlareLog SDKZero-dependency observability

Ship logs, errors, and W3C traces from Cloudflare Workers, Vercel, Node.js, TanStack Start, or the browser to FlareLog or any OTLP backend.

Zero Dependencies

No external runtime deps. Lightweight and fast for any JavaScript runtime — Node, Workers, Edge, browser.

Zero-config token, cost, and latency tracking for OpenAI, Anthropic, Workers AI, Vercel AI SDK, and any OpenAI-compatible gateway.

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Complete logging, error handling, child loggers, breadcrumbs, sampling, and beforeSend hooks.

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Full OTel spans, workerFetch wrapper, ctx.waitUntil flush. Auto-detects Worker env bindings.

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Serverless Functions, Edge Functions, and Middleware with auto environment detection.

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Drop-in wrappers for Pages Router, App Router Route Handlers, and Edge Middleware.

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Zero-config request middleware for TanStack Start v1. Auto-reads Worker env bindings on Lovable.

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Hono middleware with auto-detection of Cloudflare Worker env bindings via c.env.

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Error boundaries, useFlareLog hook, and page-view tracking for React apps.

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W3C trace propagation, distributed tracing, and multi-backend fan-out (FlareLog + Grafana + Datadog).

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Express middleware + error handler. Attaches req.logger with trace context.

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Breadcrumbs, PII scrubbing, child loggers, sampling, beforeSend hooks, and custom spans.

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Zero-config setup for Lovable-generated TanStack Start apps deployed to Cloudflare Workers.

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