Tool detail

ZeroWorker Web Action API

Inspects a public URL and returns static forms, field constraints, CAPTCHA/SPA signals and a routing verdict (http_candidate, browser_likely or undetermined) before browser automation.

Categories: Browser automation

Use when

decide whether a page needs a browser or can be fetched by plain HTTP
detect CAPTCHA or SPA signals before automating a page
discover a page's static form fields before submitting it

Not for

not for private IPs, localhost or non-standard ports - rejected
does not submit forms or perform any page action itself

Inputs

POST JSON body: { url: string } (required; public http(s) only)

Admitted input schema

{
  "type": "object",
  "properties": {
    "url": {
      "type": "string",
      "minLength": 0,
      "maxLength": 4096,
      "description": "Absolute public HTTP(S) URL to inspect. Literal IPs, localhost/local hostnames, credentials, and non-standard ports are rejected."
    }
  },
  "required": [
    "url"
  ],
  "additionalProperties": false
}

Endpoint

Method: POST
URL: https://zeroworker-web-action-api.zeroworker-lab.workers.dev/v1/preflight

Payment

Protocol: x402
Listed price: 0.003 USDC per call on Base
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://zeroworker-web-action-api.zeroworker-lab.workers.dev/v1/preflight
Retrieved: 2026-09-30T20:37:07.382Z
Catalog file SHA-256: 6837ccddf886f0007cf3727ea9d27faaa5047b51b4f425345c554ce1c271a524
Catalog built: 2026-09-30T22:31:58.034Z