AI · alternatives · 2026
24 alternatives to Code99
Simplify dev experience with AI generated RESTAPIs & Nest.js
Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Code99 launched in 2023; newer entries below may have overtaken it.
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- 2MA
2022 · github.com · its alternatives →
- 3
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Generate custom data & API to build apps in less than 30s
2021 · its alternatives →
- 5AA
2020 · autocode.com · its alternatives →
- 6
Swytchcode CLI▲449Give agents reliable access to 2,000+ APIs w/ durable state
Jun 2026 · swytchcode.com · its alternatives →
- 7
Instantly generate openapi (OAS) 3.0.0 REST + GraphQL APIs
2019 · its alternatives →
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Generate and share OpenAPI specs with AI
2025 · api.dev · its alternatives →
- 11AJ
Hey HN, we’re building an open specification that lets agents discover and invoke APIs with natural language, built on the OpenAPI standard. agents.json clearly defines the contract between LLMs and API as a standard that's open, observable, and replicable. Here’s a walkthrough of how it works: https://youtu.be/kby2Wdt2Dtk?si=59xGCDy48Zzwr7ND. There’s 2 parts to this: 1. An agents.json file describes how to link API calls together into outcome-based tools for LLMs. This file sits alongside an OpenAPI file. 2. The agents.json SDK loads agents.json files as tools for an LLM that…
2025 · github.com · its alternatives →
- 12AF
2020 · github.com · its alternatives →
- 13
Free online tool to test APIs and autogenerate documentation
2018 · its alternatives →
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Generate FastAPI, NestJS & Go backends in minutes
Jul 2026 · fastdev.tech · its alternatives →
- 19
VSCode extension to generate comments for code snippets.
2021 · its alternatives →
- 20GR
2012 · emergentone.com · its alternatives →
- 21AO
Hi Hacker News! My name is Sagar, I’m working on a startup called Speakeasy - we’re making all APIs self-service. The platform is currently in beta, but we’re independently launching this tool which you can use to generate language-idiomatic, statically-typed TS SDKs from any public OpenAPI schemas. We hope to continue iterating on this to give devs a way to easily generate high fidelity client SDKs for all the major languages. Inspiration for this product is from past experiences struggling with OpenAPI. I was originally optimistic about using the OpenAPI tools to build out our offering,…
2022 · easysdk.xyz · its alternatives →
- 22
TestMagic▲53AI-powered API test automation. Save 90% of testing time
2025 · irual.me · its alternatives →
- 23IA
Hey there HN! I just wrapped up an all-day documentation spree for Instant API, a JavaScript framework for easily building web APIs that implements type safety at the HTTP interface. It uses a function-as-a-service approach combined with a slightly modified JSDoc spec to automatically enforce parameter and schema validation before HTTP requests make it through to your code. You just write comments above your endpoint functions and voila, enforced type safety contracts between your API endpoints and your developers. OpenAPI specifications are generated automatically as a byproduct of simply…
2023 · github.com · its alternatives →
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Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →