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Prompt Optimizer
x402
Prompt Optimizer is a paid API for AI agents from prompt-optimizer.johntaylor1online.workers.dev, paid per call via x402, $0.25/call, status unknown (last checked 2026-10-11).
Optimizes and improves user-provided prompts for better AI model performance via a paid API endpoint
Price / call$0.25
Success—
StatusUnknown
How this service works
Prompt Optimizer
Output
Returns an optimized version of the submitted prompt, refined for clarity, specificity, and performance when used with AI models. The response includes the improved prompt text and potentially additional metadata about the changes made.
Example use cases
Refining a chatbot system prompt
“I have a system prompt for my customer service chatbot that's getting inconsistent responses — can you run it through the prompt optimizer to make it clearer and more effective? Here it is: 'You are a helpful assistant that answers questions about our products and returns policy.'”
Improving an image generation prompt
“This prompt for my image generator isn't producing what I want — can you optimize it to be more specific and effective? The prompt is: 'a futuristic city at night with neon lights.'”
Polishing a writing assistant instruction
“I'm building a writing tool and my instruction prompt feels too vague — can you optimize it so the AI follows it more reliably? The prompt is: 'Help the user write better emails that are concise and professional.'”
Technical details
Endpoint
POSThttps://prompt-optimizer.johntaylor1online.workers.dev/optimize?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need to programmatically improve AI prompts at scale, especially in automated pipelines where prompt quality directly impacts downstream model output. Useful for developers building prompt management tools, fine-tuning workflows, or agent frameworks where prompt quality is critical. Best for single-prompt optimization with immediate results rather than batch processing.
Side effects
- Missing required input fields returns a 400 error
- Malformed JSON body causes request rejection
- Payment failure via x402 protocol results in 402 Payment Required response
- Empty or extremely short prompt text may yield low-quality optimization
- Rate limiting or worker timeout may occur for very long prompts
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| outputrequired | object |
Tags
x402
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