Specifications
11 toolsOSSFreePopular
Mermaid
Text-to-diagram natively supported by GitHub and Notion
⭐ 87,000
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Swagger / OpenAPI
The foundational OpenAPI toolchain for API design and docs
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Speakeasy
OpenAPI → idiomatic SDKs, MCP servers, and contract tests
FreePopular
Stainless
Generates hand-crafted SDKs trusted by OpenAI and Anthropic
OSSFree
OpenAPI Generator
Community-driven code generation for 50+ languages from OpenAPI
⭐ 26,000
OSSFree
Redocly
OpenAPI linting, bundling, and beautiful API docs from one CLI
⭐ 25,500
OSSFree
AsyncAPI
Open standard for defining event-driven async APIs
⭐ 5,100
OSSFree
Fern
OpenAPI in, idiomatic SDKs and API docs out
⭐ 3,000
Free
Eraser
AI co-pilot for technical diagrams synced to your codebase
Free
Stoplight
Visual API design platform with linting, mocking, and docs built in
OSSFree
AGENTS.md
The convention for telling AI coding agents how to work in your repo
Other categories
Coding Assistants (26)Autonomous Agents (11)Agent Frameworks (16)Pipelines & RAG (12)LLM Infrastructure (44)Design & UI (11)AI-Augmented Code Quality (6)Documentation (9)Product & PM (6)MCP Servers (20)Prompt & Eval (9)Spec-Driven Dev (4)AI Code Review (3)Fine-tuning (6)Voice AI (10)Multimodal (10)Browser Automation (7)Observability (14)Memory & Persistence (6)AI Guardrails (5)