🔨 Anvil

AI-powered API testing tool — describe scenarios in natural language, Anvil does the rest.

Quick Start

# Install dependencies
yarn install

# Copy and configure
cp anvil.config.example.yaml anvil.config.yaml
# Edit anvil.config.yaml with your API details and LLM key

# Start Anvil
yarn start

Import API Specs

# Import from Postman collection
yarn start import --postman ./collection.json

# Import from OpenAPI/Swagger spec
yarn start import --openapi ./swagger.yaml

Architecture

CLI-first, no framework. Pure Node.js + TypeScript.

• Spec Parser — Ingests Postman/OpenAPI, outputs to MD knowledge base
• Agent Core — LLM-powered test orchestrator
• Skill Engine — Reusable test patterns (auth, CRUD, validation, error handling)
• Tool Layer — HTTP calls, assertions, value extraction
• Test Executor — Runs tests, captures request/response pairs

Tech Stack

• Node.js + TypeScript
• Markdown for storage (knowledge base, config, reports)
• Model-agnostic LLM adapters (OpenAI, Claude, Gemini)

License

MIT