---
title: "ISR Observability: Framework Discrepancies"
description: Understanding ISR Observability with Different Frameworks
url: "https://vercel.com/kb/guide/isr-observability-framework-discrepancies"
published: 2025-11-03
last_updated: 2026-10-16
authors: Zach Hudson
install_vercel_plugin: npx plugins add vercel/vercel-plugin
---

The Observability tab is a powerful tool for reviewing and diagnosing ISR-related usage. For example, when using Next.js, you can view all paths and see detailed metrics on reads and writes:

![Next.js ISR Observability](https://images.ctfassets.net/hjgychtc108g/puqZ7AKJASJtvkVmavSq3/2cfad9a5a2d1b99ec3d201ebde187184/next_isr.png)

However, different frameworks interact with ISR in uniquely, which may affect the level of information displayed in the Observability tab. For example, Nuxt.js only uses a single nitro function, so Vercel can only display this on the dashboard.

To enable full ISR Observability across frameworks, framework developers can integrate the [Vercel Build Output API](https://vercel.com/docs/build-output-api/v3). If your framework doesn't yet support this functionality, consider reaching out to the framework's maintainers to request this enhancement. Collaboration between framework developers and the community can help ensure everyone benefits from more comprehensive observability features.

![Nitro/Nuxt ISR Observability](https://images.ctfassets.net/hjgychtc108g/7p5BqEC52i0LjVDXtAG1D1/2560014afda6d350f2b0be718507c55a/nitro_isr.png)

## Related Documentation

- [Observability](/docs/observability)

## More Observability guides

- [Trace and debug eve agent runs](/kb/guide/trace-and-debug-eve-agent-runs): Inspect eve traces in Vercel Agent Runs, control captured content, export OpenTelemetry spans, and test fixes with regression evals.
- [Capture AI SDK token usage, tool calls, and cost with evlog](/kb/guide/ai-sdk-and-evlog): Record AI SDK usage with evlog, add cost estimates and request context, and investigate expensive or failed requests.
- [How to effectively load test your application on Vercel](/kb/guide/how-to-effectively-load-test-your-vercel-application): Learn how to safely load test your Next.js app on Vercel. This guide covers realistic, policy-compliant testing of routes, caching, middleware, and databases to uncover performance issues without impacting Vercel’s infrastructure.

## Reference Architecture

Choose a stack and work through the decisions behind it, with curated documentation, guides, templates, and courses to help you build.

- [Agent stack](/kb/architecture/agents): Build and operate agents with models, tools, and durable workflows.
- [Web applications](/kb/architecture/web): Choose rendering, data, authentication, and caching approaches.
- [Backends](/kb/architecture/backends): Choose a runtime, connect services, and run background work.

[Browse all stacks](/kb/architecture)

## Build with prompts

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[Browse the prompt library](/kb/prompts) · [Read the Markdown index](/kb/prompts.md)