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NexusAPI AI Caption Generator
x402
NexusAPI AI Caption Generator is a paid API for AI agents from nexus-api-peach-nine.vercel.app, paid per call via x402, $0.097132/call, status unknown (last checked 2026-09-14).
Generates a descriptive or creative caption for a given query or image concept using AI
Price / call$0.097132
Success—
StatusUnknown
How this service works
Crypto, AI, Social Media, Finance, Weather, Tools & more. Pay per call in USDC on Base. No API keys.
Output
Returns an AI-generated caption string based on the input query or image concept, suitable for use in social media posts, product listings, or image descriptions.
Example use cases
Example prompt
“Generate an AI caption for a photo of a golden retriever playing on the beach at sunset — something upbeat and suitable for an Instagram post.”
Technical details
Endpoint
POSThttps://nexus-api-peach-nine.vercel.app/api/ai/captionWhen to prefer
Use this endpoint when you need to quickly generate AI-written captions for images, social media posts, or content based on a text prompt, and want to pay per call without managing API keys. Best for agents that need on-demand captioning without a standing subscription.
Side effects
- Empty or missing query field returns a 400 bad request error
- Payment not completed returns 402 Payment Required
- Ambiguous or too-short query may produce a generic or low-quality caption
- Service unavailable returns 500 internal server error
- Rate limiting or quota exceeded may return 429 Too Many Requests
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| query | string | Search query or input parameter |
Output
Schema · Response
{
"type": "object",
"description": "API response data"
}Tags
x402
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Zero review prompt (fires after every successful call)
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