Agent 404 – Stop AI agents from hitting dead links and making things up

Name: Agent 404 – Stop AI agents from hitting dead links and making things up
Availability: InStock
Author: lnbharath

by lnbharath·Mar 15, 2026·3 points·0 comments

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AI Analysis

●●SolidBig BrainSolve My Problem

JSON-LD recovery beats generic 404s when Cursor hits stale docs.

Strengths

•Wire-protocol approach means zero code changes to existing sites.
•Edge deployment keeps latency under control for agent workflows.
•Specific fix for RAG pipelines indexing dead URLs after restructures.

Weaknesses

•Niche audience — only matters if AI agents actually visit your docs.
•Competes with existing redirect solutions, just agent-optimized.

Post Description

I built this after watching AI agents hit dead links on docs sites and either bail completely or hallucinate an answer from whatever context they had. It kept happening, so I decided to actually fix it.

agent-404 crawls your sitemap, indexes your pages, and when an AI agent hits a 404, it returns the best matching pages as structured JSON-LD so the agent can recover instead of guessing.

One script tag, under 3KB, runs on the edge. One-click deploy to Vercel or Cloudflare Workers. Fully open source.

Try it live: https://agent404.dev/demo

GitHub: https://github.com/bharath31/agent-404