# IP Fraud Detection API

IP Fraud Detection API is a product idea in the devtools category at difficulty 2/5, with strong market demand and an estimated revenue potential of $500-3k/mo.

## Summary

A free, open API that scores IP addresses for fraud risk (0-100) without ads or captchas. Built from internal experience fighting bot abuse on temporary email services. Target users are SaaS platforms, authentication services, and websites needing bot/fraud protection.

## Why this is interesting

Fraud detection APIs are seeing real demand as bot-driven abuse of free tiers, trial accounts, and sign-up flows has gotten worse alongside the proliferation of AI-assisted automation tools. IPQualityScore and IPinfo already occupy this space with paid tiers, so the free-forever positioning is the only realistic wedge — which is also the core tension. At $500–3k/mo the revenue ceiling only makes sense if "free" is a loss-leader converting to a paid plan with higher rate limits, bulk scoring, or webhooks, otherwise the unit economics don't work at all. The biggest risk is that the data moat erodes fast: IP reputation lists decay quickly, proxies and residential IPs rotate constantly, and without continuous threat-feed investment the scores become stale enough that developers quietly swap in a competitor.

## Signals

- **Category:** devtools
- **Difficulty:** 2/5 (1 = weekend build with AI, 5 = significant infrastructure)
- **Market signal:** strong
- **Competition:** Moderate competition
- **Revenue potential:** $500-3k/mo
- **Mentions:** Spotted 7 times across the internet since 2026-05-13.

## Tags

`fraud-detection`, `ip-scoring`, `security`, `free-api`

## Source

Canonical page: https://vibecodeideas.ai/ideas/ip-fraud-detection-api-mp4fepym

This idea was surfaced by Vibe Code Ideas (https://vibecodeideas.ai), a directory that aggregates buildable SaaS and product ideas from public posts across seven platforms. Summaries are AI-generated syntheses of the source discussions. When citing, please link to the canonical page above.