Index onlineMerchant portal
Api Endpoint

Image Alt Text Generator

Alt text for images, for web accessibility (WCAG 1.1.1, BFSG, European Accessibility Act) and SEO: send image_url or image_base64, get alt text under 125 characters that describes purpose and content, a longer description for complex images such as charts, whether the image is decorative (then alt=""), all readable text in the image, and a ready alt="..." attribute. Optional language (e.g. German) and context (where the image is used).

Open interactive test console

Offering

Provider
agentsvc.io
Method
POST
Offering type
Api Endpoint
Transport type
http
Category
Creative
Delivery
Not provided
Pricing model
Not provided
x402 version
2

Endpoint context

URL
https://agentsvc.io/api/v1/proxy/image-alt-text
MIME type
application/json
First seen
2026-10-16T01:50:45.949Z
Last seen
Tags
alt-text-generator, image-description, image-caption, WCAG, vision

Website

Payment pricing

x402 payment terms are the authoritative price for calling this endpoint.

Payment option 1
0.005 USDC
Atomic price: 5000 · Network: eip155:8453 · Asset: USDC · Scheme: exact
Payment option 2
0.005 USDC
Atomic price: 5000 · Network: solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp · Asset: USDC · Scheme: exact
Payment option 3
0.005 USDC
Atomic price: 5000 · Network: eip155:137 · Asset: USDC · Scheme: exact
Payment option 4
0.005 USDC
Atomic price: 5000 · Network: eip155:42161 · Asset: USDC · Scheme: exact
Raw x402 terms
[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "5000",
    "payTo": "0x622efA6Ceb83a5b6EdBC931332f4db68B7f74F27"
  },
  {
    "scheme": "exact",
    "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
    "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
    "amount": "5000",
    "payTo": "5JzPS5qpEwUM1vTC9GG7uqvwJdHzbEwfoPHf2Ki977tg"
  },
  {
    "scheme": "exact",
    "network": "eip155:137",
    "asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
    "amount": "5000",
    "payTo": "0x622efA6Ceb83a5b6EdBC931332f4db68B7f74F27"
  },
  {
    "scheme": "exact",
    "network": "eip155:42161",
    "asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
    "amount": "5000",
    "payTo": "0x622efA6Ceb83a5b6EdBC931332f4db68B7f74F27"
  }
]

Observed health

Status
Healthy
Latest latency
309 ms
Average latency
636 ms
HTTP status
204
Last checked
Reachability
100% over 13 checks

Latency is measured to the first response headers. A reachable result does not verify response accuracy or merchant identity.

Input schema

{
  "type": "object",
  "properties": {
    "type": {
      "type": "string",
      "const": "http"
    },
    "method": {
      "type": "string",
      "enum": [
        "POST",
        "PUT",
        "PATCH"
      ]
    },
    "bodyType": {
      "type": "string",
      "enum": [
        "json",
        "form-data",
        "text"
      ]
    },
    "body": {
      "properties": {
        "image_url": {
          "type": "string",
          "description": "Public image URL (max 15 MB)"
        },
        "image_base64": {
          "type": "string",
          "description": "Base64 image instead of a URL"
        },
        "language": {
          "type": "string",
          "description": "Language of the alt text, default English"
        },
        "context": {
          "type": "string",
          "description": "Where the image is used, max 500 chars"
        }
      },
      "required": []
    }
  },
  "required": [
    "type",
    "method",
    "bodyType",
    "body"
  ],
  "additionalProperties": false
}

Output schema

{
  "type": "object",
  "properties": {
    "type": {
      "type": "string"
    },
    "example": {
      "type": "object",
      "required": [
        "success",
        "data"
      ],
      "properties": {
        "success": {
          "type": "boolean"
        },
        "data": {
          "type": "object",
          "properties": {
            "alt_text": {
              "type": "string"
            },
            "html": {
              "type": "string"
            },
            "long_description": {
              "type": "string"
            },
            "decorative": {
              "type": "boolean"
            },
            "text_in_image": {},
            "image": {
              "type": "object",
              "properties": {
                "width": {
                  "type": "integer"
                },
                "height": {
                  "type": "integer"
                },
                "original": {
                  "type": "object",
                  "properties": {
                    "width": {
                      "type": "integer"
                    },
                    "height": {
                      "type": "integer"
                    },
                    "format": {
                      "type": "string"
                    },
                    "size_bytes": {
                      "type": "integer"
                    }
                  }
                }
              }
            },
            "language": {},
            "model": {
              "type": "string"
            }
          },
          "required": [
            "alt_text",
            "decorative"
          ]
        }
      }
    }
  },
  "required": [
    "type"
  ]
}