Lesson 582 of 2116
Webhook Routines and API-Triggered Agents
Design webhook-triggered agents that validate requests before doing any useful work.
Lesson map
What this lesson covers
Learning path
The main moves in order
- 1What the local Hermes build teaches
- 2webhook
- 3API trigger
- 4request validation
Concept cluster
Terms to connect while reading
Section 1
What the local Hermes build teaches
This build lab focuses on the webhook boundary where outside systems ask an agent to start work. The goal is not to copy a private machine setup. The goal is to learn the architecture pattern well enough to build a small, classroom-safe version.
A webhook routine authenticates, validates the payload, checks idempotency, queues a job, and returns quickly.
Compare the options
| Hermes pattern | Student build | Risk to handle |
|---|---|---|
| Name the boundary | a webhook contract for creating an agent job from a form, dashboard, or external system | letting unauthenticated HTTP requests trigger expensive model calls or real-world actions |
| Keep the interface small | Start with one happy path and one failure path | Avoid a demo that only works when everything is perfect |
| Make the system observable | Log decisions, status, and errors in plain language | Do not log private data or secrets |
Build the small version
- 1Draw or write a webhook contract for creating an agent job from a form, dashboard, or external system.
- 2Mark which parts are user-facing, which parts are internal, and which parts require approval.
- 3Choose one low-risk workflow and implement only that workflow first.
- 4Add one failure case before adding a second feature.
- 5Write a short operator note: what the agent may do, what it must ask about, and what it must never do.
A classroom-safe skeleton inspired by the local Hermes architecture scan.
POST /api/agent-jobs
1. read raw request body
2. verify signature or shared secret
3. validate JSON schema
4. reject duplicate idempotency key
5. insert queued job
6. return {status: "queued"}Key terms in this lesson
The big idea: webhook is not decoration. It is part of the product architecture students need before an agent becomes safe enough to use with real people.
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