Tool detail

AgentWork Web Evidence

Checks whether a public webpage changed since a previous read, given a prior hash or prior text, returning current text, hash and a diff or match result.

Categories: Website analysis

Use when

check whether a webpage changed since last read
monitor a documentation or pricing page for changes
take a first snapshot of a page's text and hash

Not for

not JavaScript-rendered content (HTML/text only)
not for pages requiring login or paywall bypass

Inputs

POST JSON body: { url: string(uri) } (required); optional: previous_sha256 (64-hex), previous_text, max_chars (1000-60000, default 20000)

Admitted input schema

{
  "type": "object",
  "properties": {
    "max_chars": {
      "type": "integer",
      "minimum": 1000,
      "maximum": 60000,
      "description": "Maximum returned characters; keep identical between comparisons",
      "default": 20000
    },
    "previous_sha256": {
      "type": "string",
      "minLength": 0,
      "maxLength": 4096,
      "pattern": "^[a-fA-F0-9]{64}$",
      "description": "Prior text_sha256; provides a compact change check without line diff"
    },
    "previous_text": {
      "type": "string",
      "minLength": 0,
      "maxLength": 4096,
      "description": "Exact text from the prior read, for line additions/removals"
    },
    "url": {
      "type": "string",
      "minLength": 0,
      "maxLength": 2048,
      "format": "uri",
      "description": "Public HTTP/HTTPS URL; ports 80/443 and public IPv4 resolution only"
    }
  },
  "required": [
    "url"
  ],
  "additionalProperties": false
}

Endpoint

Method: POST
URL: https://api.agentwork.run/v1/web/changes

Payment

Protocol: x402
Listed price: 0.005 USDC per call on Base (also $0.01 on Algorand)
Payment method: exact
Network: eip155:8453
Asset: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913

Listed terms are catalog metadata. The caller supplies inputs and calls the tool outside Onelayer. If payment is required, the caller uses a compatible wallet to pay.

Source

Directory: Coinbase x402 Bazaar
Record: POST https://api.agentwork.run/v1/web/changes
Retrieved: 2026-09-30T20:37:07.382Z
Catalog file SHA-256: 6837ccddf886f0007cf3727ea9d27faaa5047b51b4f425345c554ce1c271a524
Catalog built: 2026-09-30T22:31:58.034Z