API Error Handler Generator

What does your API return when a required field is missing? A clean 400 with a reason, or a stack trace and a 500? Most teams get the happy path right, then leave failures to whatever the framework throws. API Error Handler Generator writes that failure side for you, so a bad request comes back with a status a client developer can act on.

What is API Error Handler Generator?

It is a code generator for the unhappy path. Describe the endpoint in plain English, pick a language, set a few options, and it drafts the parts most people skip. It sits with the rest of the coding tools on EizTools.

• ✅ Status codes mapped to real cases, not a blanket 500
• ✅ One error shape reused across every route
• ✅ Field level validation messages
• ✅ Catch blocks around calls that can fail
• ✅ Notes on what to log and what to hide

How Does API Error Handler Generator Work?

The prompt box asks you to describe the API or endpoint you need, with its resource, methods and fields. One short paragraph is enough. Pick a model from the selector, open the advanced options accordion, then generate. The output card carries the code with a word count, plus copy, listen and downloads as TXT, Word or HTML. Recent generations stay in the activity history panel.

Auth picks the scheme guarding the route, from API Key, JWT, OAuth, Session or Basic, and that decides whether you get 401 and 403 branches. Four switches control Include Validation, Include Error Handling, Include Examples and Include Docs. Custom Instructions holds house rules.

A Checkout Endpoint That Fails Politely

You are a backend developer on a small payments service. You type this in:

POST /v1/payments creates a payment.
Fields: amount (integer, minor units), currency, order_id.
Reject bad amounts, unknown orders and duplicates.

Set Language / Framework to Laravel, API Style to REST, Auth to JWT, and switch Include Validation on. Each case gets its own status, and the body keeps one shape:

422 Unprocessable Entity
{
  "error": {
    "code": "validation_failed",
    "message": "amount must be greater than 0",
    "field": "amount"
  }
}

Under that sits a 404 for an unknown order, a 409 for a duplicate, and a fallback that logs the exception and returns a plain 500.

Where This Fits In Your Build

Generate the handlers once the routes exist and before the client team integrates, because the error shape is part of your contract. When a live endpoint throws something you cannot place, run the trace through the Error Fixer first, then write the handler.

EizTools is a free AI tools platform with a growing library of purpose built tools, and none of them ask for an account. The API Error Handler Generator runs on the same surface as the rest: one prompt box, your pick of model family, options tuned for this job, and downloads on every result. Run a brief through a second model when the draft reads thin.

Frequently Asked Questions

Error handling is the part of an API nobody plans and everybody depends on. Getting an endpoint back with its status codes, validation messages and catch blocks already written saves the usual argument over whether a missing order is a 404 or a 422.

Describe your endpoint above, set the language and API style, then read the draft before it reaches your project.