SSE Response Parser

A Yaak plugin that parses Server-Sent Events (SSE) streaming responses from LLM APIs into readable text, with metadata extraction and custom rule support.

Supported Providers

• Claude (Anthropic) - content_block_delta / text_delta
• ChatGPT (OpenAI) - chat.completion.chunk / choices[0].delta.content
• Gemini (Google) - candidates[0].content.parts[0].text
• Custom - any SSE format via user-defined JSON path rules

Usage

Response Filter

Type one of the following in the response filter box:

Input	Description
auto	Auto-detect provider format
claude	Parse Anthropic streaming response
chatgpt	Parse OpenAI streaming response
gemini	Parse Google Gemini streaming response
choices[0].delta.content	Custom JSON path per SSE event

Right-Click Actions

Right-click on any HTTP request to access:

Action	Description
SSE > Parse (Auto Detect)	Auto-detect provider and parse response
SSE > Parse (Select Provider)	Choose from built-in providers + custom rules
SSE > Add Custom Rule	Add a named JSON path rule (persisted)
SSE > Delete Custom Rule	Remove a saved custom rule

Parse Result Dialog

After parsing, a dialog shows:

• Model and provider name
• Token usage (input / output)
• Text stats (chars, words, lines)
• Search queries (Claude web search)
• Event type distribution (collapsible)
• Thinking content (Claude extended thinking, collapsible)
• Parsed content with “Copy Content” button

Custom Rules

Custom rules let you save reusable JSON path expressions with a friendly name. They persist across sessions via Yaak’s built-in store.

1. Right-click a request > SSE > Add Custom Rule
2. Enter a name (e.g., “My API”) and a JSON path (e.g., data.text)
3. The rule appears in SSE > Parse (Select Provider) dropdown alongside built-in providers

JSON path supports dot notation, bracket indices, and optional $. prefix:

• choices[0].delta.content
• $.candidates[0].content.parts[0].text
• data.text

Installation

Install from the Yaak Plugin Directory, or for local development:

git clone https://github.com/674019130/yaak-plugin-SSE-parser.git
cd yaak-plugin-SSE-parser
npm install
npm run dev

License

MIT