API Development

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Excel to JSON Converter Field Guide: When Worksheet Headers, Nested Objects, and Empty-Cell Pitfalls Decide Whether Your Spreadsheet Becomes an API or a Debugging Session

By xiezixing 2026年10月7日

Closing first: the Excel to JSON Converter on Elysia Tools is not a magic button,…

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OpenAPI to Postman Collection Field Guide: When Five Pipeline Steps, One Folder Layout, and Three Variable Strategies Decide Whether Your Imported Collection Runs in Newman or Dies on First Request

By xiezixing 2026年9月15日

Spec converted, collection downloaded, Postman says "Cannot find variable: baseUrl." That's the gap every OpenAPI-to-Postman…

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JSON Path Extractor Field Guide: When Four Operators Beat Every Regex You Wrote This Year

By xiezixing 2026年9月4日

JSONPath is what grep -o would have been if JSON had been the dominant payload…

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OpenAPI to TypeScript Generator Field Guide: When Six Controls Decide If the Generated Types Compile in a Strict-Mode Codebase

By xiezixing 2026年9月2日

The generated TypeScript sits in the same repo as your hand-written code, and the moment…

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Reading WebSocket Failures Fast: A Field Guide to the Five Close Codes That Drop Your Channel

By xiezixing 2026年8月30日

Every WebSocket bug looks the same on the server: a quiet 1006 abnormal closure, a…

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JSON Key Renamer Field Guide: When API Renames Break The Pipeline (And Five Modes That Save It)

By xiezixing 2026年8月20日

The API just renamed six fields, the staging pipeline broke, and you have forty-seven downstream…

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HTTP Request Tester: a mini Postman that lives in your browser

By xiezixing 2026年8月15日

What an in-browser HTTP client actually solves The shortest path to a real HTTP response…

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OpenAPI / Swagger Validator Field Guide: Catch Spec Drift Before Your Clients Do

By xiezixing 2026年8月11日

An OpenAPI / Swagger spec is a contract you write once and trust forever — until the first silent rename blows up three downstream clients. This field guide shows you how to lint the spec structurally before the codegen step runs.

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API Breaking Changes Detector Field Guide: The OpenAPI Diff That Catches Them All

By xiezixing 2026年8月9日

Most breaking changes in an API are visible in the OpenAPI diff before they ever…

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Your JSONPath Works Until the Second Query: Debug Pipelines Step by Step

By xiezixing 2026年7月24日

A JSONPath expression can return the right records and still leave you with a broken…