# AgentRXI Vision Ask (Moondream 3.1)

> AgentRXI Vision Ask (Moondream 3.1) is a paid API for AI agents from agentrxi.com, paid per call via x402, $0.004536/call, status unknown (last checked 2026-10-15).

Answers a question about an image using the Moondream 3.1 vision model, or generates a caption if no question is provided

## Facts

- Endpoint: GET https://agentrxi.com/v1/vision/ask?utm_source=zero.xyz
- Price: $0.004536/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/agentrxi-vision-ask-moondream-3-1-87c0a1f3
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_9eg5_3ObKf3RBW5yuyesn

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 agentrxi-vision-ask-moondream-3-1-87c0a1f3
```

Example prompt: Look at this image — https://example.com/menu.jpg — and tell me what the daily specials are by reading the text on the chalkboard sign.

## When to prefer this

Choose this endpoint when you need to ask a specific question about an image (e.g. read text, count objects, verify content) or generate a caption of controlled length. It uses the Moondream 3.1 model which is optimized for fast, lightweight visual Q&A. Prefer it over general-purpose LLM vision APIs when you want pay-per-call pricing without a subscription, or when you need captioning with explicit length control.

## Known failure modes

- Invalid or inaccessible image URL returns an error
- Image too large or unsupported format may fail
- Ambiguous questions may yield vague or incorrect answers
- max_tokens cap of 1024 may truncate long descriptions
- base64 and image_url both provided may cause conflict or one being ignored
- No image provided results in an error

## How this service works

Ask a question about an image (Moondream 3.1 vision model): read signs and screens, count things, describe a scene or check a photo. Without a question it writes a caption (short, normal or long). Priced $0.003 + up to $0.003 by max_tokens (default 512, max 1,024). Also callable as GET with the same fields as query parameters.

## Output

Returns a text answer to the posed question about the image, or a short/normal/long caption if no question was given. The response reflects Moondream 3.1's vision understanding — including OCR-style text reading, object counting, scene description, and visual Q&A.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "question": {
       "type": "string",
       "description": "Leave out for a caption"
      },
      "image_url": {
       "type": "string"
      },
      "reasoning": {
       "type": "boolean"
      },
      "image_base64": {
       "type": "string"
      },
      "caption_length": {
       "type": "string",
       "description": "short, normal, long"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/agentrxi-vision-ask-moondream-3-1-87c0a1f3/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agentrxi.com](https://www.zero.xyz/host/agentrxi.com/llms.txt)