Index onlineMerchant portal
Api Endpoint

Website Change Monitor

Website change monitoring for agents that check in a loop: send a URL and get only what changed since your last call (added and removed lines of the page text), plus optional keyword alerts. First call saves a baseline and returns a cursor; pass the cursor on the next call. The cursor only advances when a change is reported, so nothing slips through between polls. Good for price pages, docs and changelogs, job boards, status pages, competitor sites, government notices.

Open interactive test console

Offering

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

Endpoint context

URL
https://agentsvc.io/api/v1/proxy/page-watch
MIME type
application/json
First seen
2026-10-16T01:50:45.949Z
Last seen
Tags
website-monitoring, change-detection, page-diff, web-monitor, Monitoring

Website

Payment pricing

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

Payment option 1
0.003 USDC
Atomic price: 3000 · Network: eip155:8453 · Asset: USDC · Scheme: exact
Payment option 2
0.003 USDC
Atomic price: 3000 · Network: solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp · Asset: USDC · Scheme: exact
Payment option 3
0.003 USDC
Atomic price: 3000 · Network: eip155:137 · Asset: USDC · Scheme: exact
Payment option 4
0.003 USDC
Atomic price: 3000 · Network: eip155:42161 · Asset: USDC · Scheme: exact
Raw x402 terms
[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "3000",
    "payTo": "0x622efA6Ceb83a5b6EdBC931332f4db68B7f74F27"
  },
  {
    "scheme": "exact",
    "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
    "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
    "amount": "3000",
    "payTo": "5JzPS5qpEwUM1vTC9GG7uqvwJdHzbEwfoPHf2Ki977tg"
  },
  {
    "scheme": "exact",
    "network": "eip155:137",
    "asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
    "amount": "3000",
    "payTo": "0x622efA6Ceb83a5b6EdBC931332f4db68B7f74F27"
  },
  {
    "scheme": "exact",
    "network": "eip155:42161",
    "asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
    "amount": "3000",
    "payTo": "0x622efA6Ceb83a5b6EdBC931332f4db68B7f74F27"
  }
]

Observed health

Status
Healthy
Latest latency
311 ms
Average latency
949 ms
HTTP status
204
Last checked
Reachability
100% over 12 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": {
        "url": {
          "type": "string",
          "description": "Page to watch (http or https)"
        },
        "cursor": {
          "type": "string",
          "description": "Cursor from your previous call; omit on the first call"
        },
        "keywords": {
          "type": "array",
          "items": {
            "type": "string"
          },
          "maxItems": 10,
          "description": "Alert when one of these appears in newly added text (case-insensitive)"
        },
        "ignore": {
          "type": "array",
          "items": {
            "type": "string"
          },
          "maxItems": 20,
          "description": "Ignore lines containing any of these substrings"
        },
        "render": {
          "type": "boolean",
          "default": false,
          "description": "Render JavaScript before reading"
        }
      },
      "required": [
        "url"
      ]
    }
  },
  "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": {
            "url": {
              "type": "string"
            },
            "title": {
              "type": "string"
            },
            "http_status": {
              "type": "integer"
            },
            "first_check": {
              "type": "boolean"
            },
            "changed": {
              "type": "boolean"
            },
            "cursor": {
              "type": "string"
            },
            "since": {
              "type": "string"
            },
            "checked_at": {
              "type": "string"
            },
            "cursor_help": {
              "type": "string"
            },
            "summary": {
              "type": "string"
            },
            "diff": {
              "type": "object",
              "properties": {
                "added": {
                  "type": "array",
                  "items": {
                    "type": "string"
                  }
                },
                "removed": {
                  "type": "array"
                },
                "added_count": {
                  "type": "integer"
                },
                "removed_count": {
                  "type": "integer"
                },
                "truncated": {
                  "type": "boolean"
                }
              }
            },
            "keywords": {
              "type": "array",
              "items": {
                "type": "object",
                "properties": {
                  "keyword": {
                    "type": "string"
                  },
                  "present": {
                    "type": "boolean"
                  },
                  "newly_appeared": {
                    "type": "boolean"
                  }
                }
              }
            },
            "keyword_alert": {
              "type": "boolean"
            },
            "content_hash": {
              "type": "string"
            },
            "line_count": {
              "type": "integer"
            },
            "word_count": {
              "type": "integer"
            }
          },
          "required": [
            "changed",
            "cursor",
            "summary",
            "diff"
          ]
        }
      }
    }
  },
  "required": [
    "type"
  ]
}