Pay-per-request web action preflight for AI agents and automation
Pay-per-request web action preflight for AI agents and automation. Inspect a public page before launching a browser session: return static HTML forms, actions, field labels/values/options/constraints, CAPTCHA/SPA signals, DNS/public-network safety results, and a browser-likely-required heuristic as deterministic machine-readable JSON. No service account or API key required. $0.005 USDC per successful request via x402.
Answeringour last check, 2026-09-24
1 of 1checks answered this week
824 msmedian answer time
$0.005listed price per call
$0.005price it asked us
Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.
Endpoint
POST https://zeroworker-web-action-api.zeroworker-lab.workers.dev/v1/preflight
| Category | Everything else |
|---|---|
| Provider host | zeroworker-web-action-api.zeroworker-lab.workers.dev |
| Networks | eip155:8453 |
| Payment schemes | exact |
| Self-reported calls, 30 days | 3 from 2 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-09-24 | valid payment request | 402 | $0.005 | 824 ms |
Example input (from the provider)
{
"body": {
"url": "https://example.com/contact"
},
"bodyType": "json",
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"properties": {
"url": {
"description": "Absolute public HTTP(S) URL to inspect. Literal IPs, localhost/local hostnames, credentials, and non-standard ports are rejected.",
"type": "string"
}
},
"required": [
"url"
],
"type": "object"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
},
"method": {
"enum": [
"POST"
],
"type": "string"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method",
"bodyType",
"body"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"agentVerdict": {
"properties": {
"browserLikelyRequired": {
"type": "boolean"
},
"confidence": {
"enum": [
"low",
"medium",
"high"
],
"type": "string"
},
"reasons": {
"items": {
"type": "string"
},
"type": "array"
}
},
"required": [
"browserLikelyRequired",
"confidence",
"reasons"
],
"type": "object"
},
"fetchedAt": {
"type": "string"
},
"finalUrl": {
"type": "string"
},
"forms": {
"items": {
"additionalProperties": true,
"type": "object"
},
"type": "array"
},
"http": {
"properties": {
"contentType": {
"type": "string"
},
"redirectCount": {
"minimum": 0,
"type": "integer"
},
"status": {
"type": "integer"
}
},
"required": [
"status",
"contentType",
"redirectCount"
],
"type": "object"
},
"limitations": {
"items": {
"type": "string"
},
"type": "array"
},
"networkSafety": {
"properties": {
"fetchDnsChecks": {
"minimum": 2,
"type": "integer"
},
"initialDnsCheck": {
"properties": {
"addressCount": {
"minimum": 1,
"type": "integer"
},
"allPublic": {
"type": "boolean"
},
"families": {
"items": {
"enum": [
4,
6
],
"type": "integer"
},
"type": "array"
}
},
"required": [
"addressCount",
"families",
"allPublic"
],
"type": "object"
},
"postFetchDnsPublicRecheck": {
"type": "boolean"
},
"redirectTargetsRechecked": {
"type": "boolean"
}
},
"required": [
"initialDnsCheck",
"fetchDnsChecks",
"redirectTargetsRechecked",
"postFetchDnsPublicRecheck"
],
"type": "object"
},
"page": {
"properties": {
"captchaMarkers": {
"items": {
"type": "string"
},
"type": "array"
},
"formsFound": {
"minimum": 0,
"type": "integer"
},
"iframeCount": {
"minimum": 0,
"type": "integer"
},
"scriptCount": {
"minimum": 0,
"type": "integer"
},
"spaMarkers": {
"items": {
"type": "string"
},
"type": "array"
}
},
"required": [
"formsFound",
"scriptCount",
"iframeCount",
"spaMarkers",
"captchaMarkers"
],
"type": "object"
},
"requestedUrl": {
"type": "string"
}
},
"required": [
"requestedUrl",
"finalUrl",
"fetchedAt",
"http",
"networkSafety",
"page",
"forms",
"agentVerdict",
"limitations"
],
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}