Beauty & Personal Care · x402 · early usage

Alt text for images, for web accessibility (WCAG 1.1.1, BFSG, European Accessibility Ac…

by agentsvc.io · discovered, not yet claimed by its owner · updated 2026-10-11

30d calls3

30d payers2

MethodPOST

Outputjson

Mirrored from Coinbase's public x402 Bazaar. The description is the provider's own text and has not been reviewed here; the payment requirements are copied as published.

What it does

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).

Tags: alt-text · accessibility · image · seo · ai · bazaar · builder-code

Call contract

Method: POST
Input: json
Output: json
Last paid call: 2026-10-11

Input example from Bazaar metadata

{
  "image_url": "https://upload.wikimedia.org/wikipedia/commons/thumb/3/3f/Fronalpstock_big.jpg/1280px-Fronalpstock_big.jpg"
}

Output example

{
  "data": {
    "alt_text": "Panoramic view of forested mountain ridges with rocky cliffs under cumulus clouds, with a lake visible at the lower right",
    "decorative": false,
    "html": "alt=\"Panoramic view of forested mountain ridges with rocky cliffs under cumulus clouds, with a lake visible at the lower right\"",
    "image": {
      "height": 359,
      "original": {
        "format": "jpeg",
        "height": 575,
        "size_bytes": 221419,
        "width": 1280
      },
      "width": 800
    },
    "language": null,
    "long_description": "A wide landscape photo of a steep, forested mountain with a flat rocky summit and exposed limestone cliffs at its top. Lower slopes show green meadows and scattered farm buildings, while snow-capped peaks rise in the distance on the right. A blue lake appears at the far lower right beneath a blue sky with white clouds.",
    "model": "claude-haiku-5-5",
    "text_in_image": null
  },
  "success": true
}

Use with an agent

Discover. Agents find this listing with GET https://bazaar.saylorinnovations.com/discovery/search?query=…, the MCP tool search_resources, or /discovery/resources.
Inspect. Fetch /resources/35697.json for the price and payment options.
Pay. Call GET https://agentsvc.io/api/v1/proxy/image-alt-text. The provider answers 402 with its payment requirements. An x402 client signs one of the options below and retries with PAYMENT-SIGNATURE.
Execute. The provider returns 200 with the data. Agent Bazaar is not in the request path and never sees your payment.

For humans

You don't need an account or an API key; you need a wallet holding a small amount of USDC on Base, Solana, Polygon, Arbitrum One, and an x402-capable client (see the examples below). Call the endpoint unpaid first to see exactly what it asks for.

Pricing & payment

Price: $0.005 / request
Protocol: x402 v2
Auth: No account or API key. Pay per request.
Networks: Base, Solana, Polygon, Arbitrum One
Demand: 3 calls · 2 unique payers in 30d (public x402 Bazaar data)

x402 payment requirements

Scheme	Network	Asset	Amount	Pay to	Timeout
exact	Base eip155:8453	USDC	$0.005	0x622efA6Ceb83a5b6EdBC931332f4db68B7f74F27	300s
exact	Solana solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp	USDC	$0.005	5JzPS5qpEwUM1vTC9GG7uqvwJdHzbEwfoPHf2Ki977tg	300s
exact	Polygon eip155:137	USDC	$0.005	0x622efA6Ceb83a5b6EdBC931332f4db68B7f74F27	300s
exact	Arbitrum One eip155:42161	USDC	$0.005	0x622efA6Ceb83a5b6EdBC931332f4db68B7f74F27	300s

accepts[] (raw JSON)

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0x622efA6Ceb83a5b6EdBC931332f4db68B7f74F27",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "5000",
    "amountUsd": 0.005,
    "maxTimeoutSeconds": 300
  },
  {
    "scheme": "exact",
    "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
    "payTo": "5JzPS5qpEwUM1vTC9GG7uqvwJdHzbEwfoPHf2Ki977tg",
    "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
    "amount": "5000",
    "amountUsd": 0.005,
    "maxTimeoutSeconds": 300
  },
  {
    "scheme": "exact",
    "network": "eip155:137",
    "payTo": "0x622efA6Ceb83a5b6EdBC931332f4db68B7f74F27",
    "asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
    "amount": "5000",
    "amountUsd": 0.005,
    "maxTimeoutSeconds": 300
  },
  {
    "scheme": "exact",
    "network": "eip155:42161",
    "payTo": "0x622efA6Ceb83a5b6EdBC931332f4db68B7f74F27",
    "asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
    "amount": "5000",
    "amountUsd": 0.005,
    "maxTimeoutSeconds": 300
  }
]

Schemas

Output schema (JSON Schema)

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

Example shape — generated from the schema, not a captured live response

{
  "example": {
    "data": {
      "alt_text": "string",
      "decorative": true,
      "html": "string",
      "image": {
        "height": 0,
        "original": {
          "format": "string",
          "height": 0,
          "size_bytes": 0,
          "width": 0
        },
        "width": 0
      },
      "language": null,
      "long_description": "string",
      "model": "string",
      "text_in_image": null
    },
    "success": true
  },
  "type": "string"
}

Examples

curl

curl "https://agentsvc.io/api/v1/proxy/image-alt-text"
# -> 402 Payment Required, accepts[] lists how to pay
# retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid

JavaScript

const res = await fetch("https://agentsvc.io/api/v1/proxy/image-alt-text");
if (res.status === 402) {
  const { accepts } = await res.json();
  // pay one of accepts[] via an x402 client, then retry with the payment header
}

Python

import httpx
res = httpx.get("https://agentsvc.io/api/v1/proxy/image-alt-text")
if res.status_code == 402:
    accepts = res.json()["accepts"]
    # pay one of accepts[] via an x402 client, then retry with the payment header

Details

Provider: agentsvc.io
Endpoint: https://agentsvc.io/api/v1/proxy/image-alt-text
Machine-readable: /resources/35697.json