# Finding three-way API drift with the AI Engineer

DevFeed: [Finding three-way API drift with the AI Engineer](<https://devfeed.tech/articles/finding-three-way-api-drift-with-the-ai-engineer-12635.md>)

Original publisher: [Read original article](<https://blog.postman.com/finding-three-way-api-drift-with-the-ai-engineer/>)

Author: Talia Kohan

Published: 2026-09-01T16:00:00Z

Content type: article

Language: en

Sources: [Postman Blog](<https://devfeed.tech/sources/postman-blog.md>)

Topics: [API](<https://devfeed.tech/topics/api.md>), [Postman](<https://devfeed.tech/topics/postman.md>), [OpenAPI Specification](<https://devfeed.tech/topics/openapi.md>), [Claude](<https://devfeed.tech/topics/claude.md>), [Tooling](<https://devfeed.tech/topics/tooling.md>), [client](<https://devfeed.tech/topics/client.md>), [servers](<https://devfeed.tech/topics/servers.md>)

Tags: [ai-engineer](<https://devfeed.tech/tags/ai-engineer.md>), [api](<https://devfeed.tech/tags/api.md>), [api-drift](<https://devfeed.tech/tags/api-drift.md>), [apis](<https://devfeed.tech/tags/apis.md>), [ci](<https://devfeed.tech/tags/ci.md>), [fintech](<https://devfeed.tech/tags/fintech.md>), [general](<https://devfeed.tech/tags/general.md>), [openapi](<https://devfeed.tech/tags/openapi.md>), [postman-ai-engineer](<https://devfeed.tech/tags/postman-ai-engineer.md>), [production](<https://devfeed.tech/tags/production.md>), [qa](<https://devfeed.tech/tags/qa.md>)

## AI overview

The article explains how to detect three-way API drift by comparing an OpenAPI specification, the requests in Postman Collections, and the responses returned by a running server. It argues that pairwise checks can miss cases where all three sources disagree, and describes using Postman AI Engineer and the Context Graph to identify these inconsistencies.

## Source excerpt

Find three-way API drift with Postman AI Engineer and the Context Graph. Compares your OpenAPI spec, collection requests, and live server responses. The post Finding three-way API drift with the AI Engineer appeared first on Postman Blog.