# Image Watermarking API

> Image Watermarking API is a paid API for AI agents from remarkable-light-production-0cb8.up.railway.app, paid per call via x402, $0.03/call, status unknown (last checked 2026-10-19).

Applies a watermark to an image and returns the processed image as a base64-encoded PNG

## Facts

- Endpoint: POST https://remarkable-light-production-0cb8.up.railway.app/watermark?utm_source=zero.xyz
- Price: $0.03/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-19
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/image-watermarking-api-4074e24d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_aTlMJFl_3cJmzdxNUQF5x

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 image-watermarking-api-4074e24d -d '<json body>'
```

Example prompt: Can you watermark this image for me before I publish it? I need the result back as a PNG.

## When to prefer this

Choose this endpoint when you need a simple, pay-per-call watermarking step within an AI agent workflow, especially when you want the result as a base64 PNG without managing your own image processing infrastructure. It suits pipelines where images are processed one at a time before publishing or distribution.

## Known failure modes

- Missing or malformed image body returns an error
- Unsupported body type (must be json, form-data, or text) causes a 400-level error
- Invalid or empty input object may result in processing failure
- Network timeout on Railway deployment under heavy load
- Insufficient USDC balance causes x402 payment failure before processing begins

## How this service works

Image processing for AI agents

## Output

Returns a JSON object containing a base64-encoded watermarked image and the format label ('png'). The agent can decode the base64 string to obtain the final processed image file ready for storage or display.

## 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",
    "bodyType",
    "body"
   ],
   "properties": {
    "body": {
     "properties": {}
    },
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "POST"
     ],
     "type": "string"
    },
    "bodyType": {
     "enum": [
      "json",
      "form-data",
      "text"
     ],
     "type": "string"
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "image": "base64...",
  "format": "png"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/image-watermarking-api-4074e24d/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from remarkable-light-production-0cb8.up.railway.app](https://www.zero.xyz/host/remarkable-light-production-0cb8.up.railway.app/llms.txt)