Postman mapped 115 microservices for coding agents with an API context graph
AI Engineer · youtube · 2026-10-09
Postman staff engineer Kamalakannan Nandagopal explains how coding agents can work across a real distributed system of 115 microservices and thousands of endpoints.
Approach
- Docs go stale; skills/MCPs are only as good as their context — they concluded APIs themselves are the context layer
- Built an API context graph mapping every service, endpoint, implementation, and call down to databases, grounded in code and production telemetry
Findings
- Evals built from real PRs and design decisions
- Big wins on API discovery, redesign, and impact assessment
- Agent autonomously produced a 21-page architecture review
- 75% of PRs touch APIs
- Honest failure case: a stale graph broke performance — keeping it fresh matters as much as building it
Postman has shipped a Context Graph API and docs.
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