API Call Change Firewall

Stop AI agents from modifying or misusing your API tool calls

Problem

When AI agents call external APIs, model hallucinations or misunderstandings can alter request parameters, causing unintended actions (data deletion, wrong orders). Existing tools lack real-time validation and blocking of API call parameters.

Solution

A lightweight gateway that validates request parameters against predefined rules (field ranges, enums, required fields) between AI agents and APIs. It blocks invalid calls, returns errors, and logs audit trails to help debug agent behavior.

Users

Developers building AI agents connected to sensitive APIs, especially in finance, e-commerce, and ops.

MVP

Define API parameter rules (JSON Schema); proxy requests through gateway validation; return errors and log mismatches; simple log dashboard; webhook alerts.

Revenue

Subscription by validated requests: free 10k/month, $29/month for 100k; or per-project one-time license.

Why now

AI agents are rapidly spreading but security controls are scarce; indie developers can build a lightweight gateway without complex infrastructure.