OpenAPI → Repeater (Burp Extension)

A simple Burp Suite extension (Jython 2.7) that imports an OpenAPI specification and generates HTTP requests you can copy to clipboard or send directly to Repeater.

Features

• Import OpenAPI v3 (JSON format) and generate example requests
• UI fields for:
  • Target host (with optional :port)
  • HTTPS toggle
  • Authorization (Bearer token)
  • Extra headers
• Normalize CRLF line endings to ensure valid raw HTTP
• Copy raw requests to clipboard or send directly to Repeater

Installation

1. Download Jython standalone 2.7.x and add it in Burp → Extender → Options → Python Environment.
2. In Burp → Extender → Extensions → Add:
   • Type: Python
   • Select src/openapi_to_repeater.py
3. A new OpenAPI→Repeater tab will appear in Burp.

Usage

1. Click Load OpenAPI JSON and select your spec file.
2. Enter target host (with optional port) and adjust HTTPS checkbox.
3. (Optional) Add a Bearer token and any extra headers.
4. Select a request from the list.
   • Send to Repeater → pushes request directly into Repeater
   • Copy Raw → copies the raw HTTP request to clipboard
   • View Raw → preview the generated request

Converting YAML to JSON

If your OpenAPI specification is in YAML, convert it to JSON before loading:

pip install pyyaml
python -c "import yaml,json,sys; print(json.dumps(yaml.safe_load(open(sys.argv[1]))))" openapi.yaml > openapi.json