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NexusAPI Instagram Caption Generator
x402
NexusAPI Instagram Caption Generator is a paid API for AI agents from nexus-api-virid.vercel.app, paid per call via x402, $0.123132/call, status unknown (last checked 2026-10-10).
Generates AI-written captions for Instagram posts based on a text query or topic input
Price / call$0.123132
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
A generated Instagram caption tailored to the provided query or topic, typically including suggested hashtags and engaging copy optimized for the Instagram platform.
Example use cases
Travel photo caption creation
“I just got back from Santorini and want to post a stunning sunset photo — can you write me a beautiful, evocative Instagram caption for it with some fitting hashtags?”
Product launch social copy
“Write me an Instagram caption to announce the launch of my new handmade candle line called 'Ember & Oak' — make it warm, lifestyle-focused, and include hashtags.”
Fitness influencer post caption
“I need a motivational Instagram caption for my post-workout selfie at the gym — something energetic and relatable that'll resonate with fitness followers, with hashtags.”
Technical details
Endpoint
POSThttps://nexus-api-virid.vercel.app/api/ai/caption/instagram?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need quick, AI-generated Instagram captions on demand without managing your own LLM prompts or API keys, and you want to pay per call in USDC with no subscription. Best for agents automating social media content pipelines or users who need one-off caption generation.
Side effects
- Empty or vague query may produce generic or low-quality captions
- Missing input query field returns a validation error
- Service downtime on the Vercel deployment may cause 502/503 errors
- Payment failure in USDC on Base causes a 402 Payment Required response before content is returned
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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