APIRadar third-party API change radar

Automatically track changelogs of APIs you depend on and warn about breaking changes early

Problem

A company spent weeks digging into breaking changes across third-party APIs; vibe-coded and agent-generated code also hallucinates endpoints or model names that don't exist, and with more tools in production the churn only grows.

Solution

Subscribe to changelogs/RSS/release pages of services you depend on, use an LLM to classify entries as breaking/deprecation/addition, match against your dependency list, and push to Slack/email. Also check that endpoints called in your code actually exist against official docs.

Users

Small teams relying on multiple third-party APIs, indie developers, and people maintaining agent-generated code

MVP

Manage dependency services and changelog sources; scheduled fetch and LLM tagging; breaking-change email/Slack alerts; simple dashboard grouped by service; no automatic code fixes

Revenue

Subscription by number of monitored services (free for 3, paid from $9/mo); team tier per seat

Why now

Agent-generated code amplifies API call errors and change impact, and manual changelog tracking doesn't scale; the fetch + LLM classification stack is lightweight