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OmniAPI AI Caption Generator
x402
OmniAPI AI Caption Generator is a paid API for AI agents from omni-api-cyan.vercel.app, paid per call via x402, $0.04612/call, status unknown (last checked 2026-09-14).
Generates a descriptive text caption for a given input (image URL, text, or query) using AI
Price / call$0.04612
Success—
StatusUnknown
How this service works
444 endpoints across 9+ chains. Crypto, AI, Social, Finance, Weather, Tools. Pay per call in USDC via x402 with 4 facilitators: Dexter, Meridian, FluxA, GoPlausible.
Output
Returns a JSON object containing an AI-generated caption or descriptive text string corresponding to the provided query or input data.
Example use cases
Social media image captioning
“Write me an engaging AI-generated caption for this product photo I'm posting on Instagram — the query is 'sleek black leather wallet on a marble surface'.”
Accessibility alt-text generation
“Generate an AI caption describing this image for accessibility purposes — the input is a photo of a crowded farmers market on a sunny day.”
Content pipeline auto-labeling
“I need a short descriptive caption for each image in my batch — start with this one: a golden retriever puppy playing in autumn leaves.”
Technical details
Endpoint
POSThttps://omni-api-cyan.vercel.app/api/ai/captionWhen to prefer
Choose this endpoint when you need a quick, pay-per-call AI caption generation without committing to a subscription service, especially in multi-chain crypto-native workflows where USDC micropayments via x402 are already in use. It suits agents that need on-demand captioning integrated with other OmniAPI capabilities like social or finance endpoints.
Side effects
- Missing required 'query' field returns a validation error
- Vague or ambiguous queries may produce generic or low-quality captions
- Payment failure via x402 results in a 402 Payment Required response
- Overly long or malformed input may be truncated or rejected
- Unsupported input types may return an empty or error response
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| input | string | Input data for the endpoint |
| queryrequired | string | Search query or input text |
| params | object | Additional parameters |
Output
Schema · Response
{
"type": "object",
"description": "API response data"
}Tags
x402
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