{
  "x402Version": 2,
  "id": 38428,
  "slug": "38428",
  "resource": "https://zeroworker-web-action-api.zeroworker-lab.workers.dev/v1/preflight",
  "description": "Avoid unnecessary browser launches with a lightweight preflight for AI agents. ZeroWorker inspects public pages before browser automation and returns static forms, field constraints, CAPTCHA/SPA signals, DNS/public-network safety checks, and a 3-state routing verdict: http_candidate, browser_likely, or undetermined. Use it to choose direct HTTP or escalate to a browser. No API key required. $0.003 USDC per successful request via x402 on Base Mainnet.",
  "type": "http",
  "serviceName": "ZeroWorker Web Action API",
  "resourceType": "Agent Service",
  "accepts": [
    {
      "scheme": "exact",
      "network": "eip155:8453",
      "payTo": "0xad277cf8B5D9fa5008D06cBdBE349F5DF3c0Cc8f",
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "amount": "3000",
      "amountUsd": 0.003,
      "maxTimeoutSeconds": 300
    }
  ],
  "outputSchema": {
    "properties": {
      "example": {
        "properties": {
          "agentVerdict": {
            "properties": {
              "browserLikelyRequired": {
                "description": "Backward-compatible boolean. True only for browser_likely; false also covers undetermined.",
                "type": "boolean"
              },
              "confidence": {
                "enum": [
                  "low",
                  "medium",
                  "high"
                ],
                "type": "string"
              },
              "reasons": {
                "items": {
                  "type": "string"
                },
                "type": "array"
              },
              "verdict": {
                "description": "Preferred three-state routing result. Use this instead of inferring direct-HTTP suitability from browserLikelyRequired=false.",
                "enum": [
                  "http_candidate",
                  "browser_likely",
                  "undetermined"
                ],
                "type": "string"
              }
            },
            "required": [
              "verdict",
              "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"
  },
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "body": {
            "url": "https://example.com/contact"
          },
          "bodyType": "json",
          "method": "POST",
          "type": "http"
        },
        "output": {
          "example": {
            "agentVerdict": {
              "browserLikelyRequired": false,
              "confidence": "high",
              "reasons": [
                "At least one static GET/POST form can be described from the initial HTML without executing page JavaScript."
              ],
              "verdict": "http_candidate"
            },
            "fetchedAt": "2026-09-23T10:00:00.000Z",
            "finalUrl": "https://example.com/contact",
            "forms": [
              {
                "action": "https://example.com/contact/submit",
                "enctype": "application/x-www-form-urlencoded",
                "fieldCount": 4,
                "fields": [
                  {
                    "autocomplete": "email",
                    "checked": false,
                    "disabled": false,
                    "id": "contact-email",
                    "label": "Email address",
                    "max": null,
                    "maxLength": 254,
                    "min": null,
                    "minLength": null,
                    "multiple": false,
                    "name": "email",
                    "options": null,
                    "pattern": null,
                    "placeholder": "you@example.com",
                    "required": true,
                    "selectedValues": null,
                    "step": null,
                    "type": "email",
                    "value": ""
                  },
                  {
                    "autocomplete": null,
                    "checked": false,
                    "disabled": false,
                    "id": "plan",
                    "label": "Plan",
                    "max": null,
                    "maxLength": null,
                    "min": null,
                    "minLength": null,
                    "multiple": false,
                    "name": "plan",
                    "options": [
                      {
                        "disabled": false,
                        "label": null,
                        "selected": false,
                        "text": "Basic",
                        "value": "basic"
                      },
                      {
                        "disabled": false,
                        "label": null,
                        "selected": true,
                        "text": "Pro",
                        "value": "pro"
                      }
                    ],
                    "pattern": null,
                    "placeholder": null,
                    "required": true,
                    "selectedValues": [
                      "pro"
                    ],
                    "step": null,
                    "type": "select",
                    "value": "pro"
                  }
                ],
                "hasFileUpload": false,
                "hasPasswordField": false,
                "index": 0,
                "method": "POST",
                "standardHttpSubmission": true,
                "submitControls": 1
              }
            ],
            "http": {
              "contentType": "text/html; charset=utf-8",
              "redirectCount": 0,
              "status": 200
            },
            "limitations": [
              "Static initial HTML only; page JavaScript is not executed.",
              "Use agentVerdict.verdict for the preferred three-state routing result; browserLikelyRequired remains for backward compatibility and false can also mean undetermined.",
              "This service inspects structure only and does not submit forms or perform actions."
            ],
            "networkSafety": {
              "fetchDnsChecks": 2,
              "initialDnsCheck": {
                "addressCount": 2,
                "allPublic": true,
                "families": [
                  4,
                  6
                ]
              },
              "postFetchDnsPublicRecheck": true,
              "redirectTargetsRechecked": true
            },
            "page": {
              "captchaMarkers": [],
              "formsFound": 1,
              "iframeCount": 0,
              "scriptCount": 2,
              "spaMarkers": []
            },
            "requestedUrl": "https://example.com/contact"
          },
          "type": "json"
        }
      },
      "schema": {
        "$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": {
                        "description": "Backward-compatible boolean. True only for browser_likely; false also covers undetermined.",
                        "type": "boolean"
                      },
                      "confidence": {
                        "enum": [
                          "low",
                          "medium",
                          "high"
                        ],
                        "type": "string"
                      },
                      "reasons": {
                        "items": {
                          "type": "string"
                        },
                        "type": "array"
                      },
                      "verdict": {
                        "description": "Preferred three-state routing result. Use this instead of inferring direct-HTTP suitability from browserLikelyRequired=false.",
                        "enum": [
                          "http_candidate",
                          "browser_likely",
                          "undetermined"
                        ],
                        "type": "string"
                      }
                    },
                    "required": [
                      "verdict",
                      "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"
      }
    }
  },
  "tags": [
    "preflight",
    "forms",
    "ai-agents",
    "web-automation",
    "browser-automation",
    "bazaar"
  ],
  "sourceHost": "zeroworker-web-action-api.zeroworker-lab.workers.dev",
  "lastUpdated": "2026-09-25T11:25:54.249Z",
  "quality": {
    "calls30d": 7,
    "uniquePayers30d": 4,
    "lastCalledAt": "2026-10-09T07:42:32.898Z"
  },
  "metadata": {
    "serviceName": "ZeroWorker Web Action API",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "body": {
              "url": "https://example.com/contact"
            },
            "bodyType": "json",
            "method": "POST",
            "type": "http"
          },
          "output": {
            "example": {
              "agentVerdict": {
                "browserLikelyRequired": false,
                "confidence": "high",
                "reasons": [
                  "At least one static GET/POST form can be described from the initial HTML without executing page JavaScript."
                ],
                "verdict": "http_candidate"
              },
              "fetchedAt": "2026-09-23T10:00:00.000Z",
              "finalUrl": "https://example.com/contact",
              "forms": [
                {
                  "action": "https://example.com/contact/submit",
                  "enctype": "application/x-www-form-urlencoded",
                  "fieldCount": 4,
                  "fields": [
                    {
                      "autocomplete": "email",
                      "checked": false,
                      "disabled": false,
                      "id": "contact-email",
                      "label": "Email address",
                      "max": null,
                      "maxLength": 254,
                      "min": null,
                      "minLength": null,
                      "multiple": false,
                      "name": "email",
                      "options": null,
                      "pattern": null,
                      "placeholder": "you@example.com",
                      "required": true,
                      "selectedValues": null,
                      "step": null,
                      "type": "email",
                      "value": ""
                    },
                    {
                      "autocomplete": null,
                      "checked": false,
                      "disabled": false,
                      "id": "plan",
                      "label": "Plan",
                      "max": null,
                      "maxLength": null,
                      "min": null,
                      "minLength": null,
                      "multiple": false,
                      "name": "plan",
                      "options": [
                        {
                          "disabled": false,
                          "label": null,
                          "selected": false,
                          "text": "Basic",
                          "value": "basic"
                        },
                        {
                          "disabled": false,
                          "label": null,
                          "selected": true,
                          "text": "Pro",
                          "value": "pro"
                        }
                      ],
                      "pattern": null,
                      "placeholder": null,
                      "required": true,
                      "selectedValues": [
                        "pro"
                      ],
                      "step": null,
                      "type": "select",
                      "value": "pro"
                    }
                  ],
                  "hasFileUpload": false,
                  "hasPasswordField": false,
                  "index": 0,
                  "method": "POST",
                  "standardHttpSubmission": true,
                  "submitControls": 1
                }
              ],
              "http": {
                "contentType": "text/html; charset=utf-8",
                "redirectCount": 0,
                "status": 200
              },
              "limitations": [
                "Static initial HTML only; page JavaScript is not executed.",
                "Use agentVerdict.verdict for the preferred three-state routing result; browserLikelyRequired remains for backward compatibility and false can also mean undetermined.",
                "This service inspects structure only and does not submit forms or perform actions."
              ],
              "networkSafety": {
                "fetchDnsChecks": 2,
                "initialDnsCheck": {
                  "addressCount": 2,
                  "allPublic": true,
                  "families": [
                    4,
                    6
                  ]
                },
                "postFetchDnsPublicRecheck": true,
                "redirectTargetsRechecked": true
              },
              "page": {
                "captchaMarkers": [],
                "formsFound": 1,
                "iframeCount": 0,
                "scriptCount": 2,
                "spaMarkers": []
              },
              "requestedUrl": "https://example.com/contact"
            },
            "type": "json"
          }
        },
        "schema": {
          "$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": {
                          "description": "Backward-compatible boolean. True only for browser_likely; false also covers undetermined.",
                          "type": "boolean"
                        },
                        "confidence": {
                          "enum": [
                            "low",
                            "medium",
                            "high"
                          ],
                          "type": "string"
                        },
                        "reasons": {
                          "items": {
                            "type": "string"
                          },
                          "type": "array"
                        },
                        "verdict": {
                          "description": "Preferred three-state routing result. Use this instead of inferring direct-HTTP suitability from browserLikelyRequired=false.",
                          "enum": [
                            "http_candidate",
                            "browser_likely",
                            "undetermined"
                          ],
                          "type": "string"
                        }
                      },
                      "required": [
                        "verdict",
                        "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"
        }
      }
    }
  },
  "liveness": {
    "reliability": null
  },
  "verified": false,
  "featured": false,
  "provider": {
    "host": "zeroworker-web-action-api.zeroworker-lab.workers.dev",
    "manifest_name": "zeroworker-web-action-api.zeroworker-lab.workers.dev",
    "source": "cdp-mirror",
    "source_manifest_url": "https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources",
    "submitted_at": "2026-10-14T01:15:01.050Z"
  },
  "exampleResponse": {
    "example": {
      "agentVerdict": {
        "browserLikelyRequired": true,
        "confidence": "low",
        "reasons": [
          "string"
        ],
        "verdict": "http_candidate"
      },
      "fetchedAt": "string",
      "finalUrl": "string",
      "forms": [
        {}
      ],
      "http": {
        "contentType": "string",
        "redirectCount": 0,
        "status": 0
      },
      "limitations": [
        "string"
      ],
      "networkSafety": {
        "fetchDnsChecks": 0,
        "initialDnsCheck": {
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          "allPublic": true,
          "families": [
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          ]
        },
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        "redirectTargetsRechecked": true
      },
      "page": {
        "captchaMarkers": [
          "string"
        ],
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        "iframeCount": 0,
        "scriptCount": 0,
        "spaMarkers": [
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        ]
      },
      "requestedUrl": "string"
    },
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  }
}