# NexusAPI Instagram Caption Generator

> 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

## Facts

- Endpoint: POST https://nexus-api-virid.vercel.app/api/ai/caption/instagram?utm_source=zero.xyz
- Price: $0.123132/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-10
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/nexusapi-instagram-caption-generator-e197e57b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_RYcsV3oCczCGJThC_JSju

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability nexusapi-instagram-caption-generator-e197e57b -d '<json body>'
```

Example prompt: Write me an engaging Instagram caption for a post about my morning hike in the mountains — something inspiring with relevant hashtags.

## When to prefer this

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.

## Known failure modes

- 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

## How this service works

Crypto, AI, Social Media, Finance, Weather, Tools &amp; 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.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "query": {
   "type": "string",
   "description": "Search query or input parameter"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "description": "API response data"
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/nexusapi-instagram-caption-generator-e197e57b/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from nexus-api-virid.vercel.app](https://www.zero.xyz/host/nexus-api-virid.vercel.app/llms.txt)