{
  "x402Version": 2,
  "id": 29144,
  "slug": "29144",
  "resource": "https://http-header-checker.underscoredone.com/check",
  "description": "Sends a request to a web address you provide and reports back everything the server said in response: the status code, all the response headers, how many times it got redirected, and how long the whole thing took.",
  "type": "http",
  "serviceName": "HTTP Header Checker",
  "resourceType": "Security",
  "accepts": [
    {
      "scheme": "exact",
      "network": "eip155:8453",
      "payTo": "0xE9740820225B3918b4ddd1292C7cA4Ca0e2C2F08",
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "amount": "10000",
      "amountUsd": 0.01,
      "maxTimeoutSeconds": 300
    },
    {
      "scheme": "exact",
      "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
      "payTo": "8ugAWAXDB8V18kiUrGZTq1oMvU3C6Fxs8hfC6rvzQT3b",
      "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
      "amount": "10000",
      "amountUsd": 0.01,
      "maxTimeoutSeconds": 300
    }
  ],
  "outputSchema": {
    "properties": {
      "example": {
        "properties": {
          "api_version": {
            "type": "string"
          },
          "final_url": {
            "type": "string"
          },
          "headers": {
            "additionalProperties": true,
            "type": "object"
          },
          "missing_security_headers": {
            "items": {
              "type": "string"
            },
            "type": "array"
          },
          "redirect_chain": {
            "items": {
              "type": "object"
            },
            "type": "array"
          },
          "response_time_ms": {
            "type": "integer"
          },
          "status_code": {
            "type": "integer"
          },
          "url": {
            "type": "string"
          }
        },
        "required": [
          "api_version",
          "url",
          "final_url",
          "status_code",
          "redirect_chain",
          "headers",
          "missing_security_headers",
          "response_time_ms"
        ],
        "type": "object"
      },
      "type": {
        "type": "string"
      }
    },
    "required": [
      "type"
    ],
    "type": "object"
  },
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "body": {
            "follow_redirects": true,
            "method": "GET",
            "url": "https://example.com"
          },
          "bodyType": "json",
          "method": "POST",
          "type": "http"
        },
        "output": {
          "example": {
            "api_version": "1.0.0",
            "final_url": "https://example.com/",
            "headers": {
              "cache-control": "max-age=600",
              "content-length": "1256",
              "content-type": "text/html; charset=UTF-8",
              "server": "nginx"
            },
            "missing_security_headers": [
              "strict-transport-security",
              "content-security-policy"
            ],
            "redirect_chain": [
              {
                "status_code": 301,
                "url": "http://example.com"
              }
            ],
            "response_time_ms": 214,
            "status_code": 200,
            "url": "https://example.com"
          },
          "type": "json"
        }
      },
      "schema": {
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "properties": {
          "input": {
            "additionalProperties": false,
            "properties": {
              "body": {
                "additionalProperties": false,
                "properties": {
                  "follow_redirects": {
                    "description": "Whether to follow redirects to their final destination or stop at the first one",
                    "type": "boolean"
                  },
                  "method": {
                    "description": "Either GET or HEAD; GET fetches the page normally, HEAD only asks for headers without the body",
                    "type": "string"
                  },
                  "url": {
                    "description": "The full web address to check, including http:// or https://",
                    "type": "string"
                  }
                },
                "required": [
                  "url"
                ],
                "type": "object"
              },
              "bodyType": {
                "enum": [
                  "json",
                  "form-data",
                  "text"
                ],
                "type": "string"
              },
              "method": {
                "enum": [
                  "POST",
                  "PUT",
                  "PATCH"
                ],
                "type": "string"
              },
              "type": {
                "const": "http",
                "type": "string"
              }
            },
            "required": [
              "type",
              "method",
              "bodyType",
              "body"
            ],
            "type": "object"
          },
          "output": {
            "properties": {
              "example": {
                "properties": {
                  "api_version": {
                    "type": "string"
                  },
                  "final_url": {
                    "type": "string"
                  },
                  "headers": {
                    "additionalProperties": true,
                    "type": "object"
                  },
                  "missing_security_headers": {
                    "items": {
                      "type": "string"
                    },
                    "type": "array"
                  },
                  "redirect_chain": {
                    "items": {
                      "type": "object"
                    },
                    "type": "array"
                  },
                  "response_time_ms": {
                    "type": "integer"
                  },
                  "status_code": {
                    "type": "integer"
                  },
                  "url": {
                    "type": "string"
                  }
                },
                "required": [
                  "api_version",
                  "url",
                  "final_url",
                  "status_code",
                  "redirect_chain",
                  "headers",
                  "missing_security_headers",
                  "response_time_ms"
                ],
                "type": "object"
              },
              "type": {
                "type": "string"
              }
            },
            "required": [
              "type"
            ],
            "type": "object"
          }
        },
        "required": [
          "input"
        ],
        "type": "object"
      }
    }
  },
  "tags": [
    "http headers",
    "response headers",
    "headers",
    "inspect http headers",
    "server headers",
    "bazaar"
  ],
  "sourceHost": "http-header-checker.underscoredone.com",
  "lastUpdated": "2026-10-08T05:33:37.648Z",
  "quality": {
    "calls30d": 4,
    "uniquePayers30d": 3,
    "lastCalledAt": "2026-10-08T05:33:37.436Z"
  },
  "metadata": {
    "serviceName": "HTTP Header Checker",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "body": {
              "follow_redirects": true,
              "method": "GET",
              "url": "https://example.com"
            },
            "bodyType": "json",
            "method": "POST",
            "type": "http"
          },
          "output": {
            "example": {
              "api_version": "1.0.0",
              "final_url": "https://example.com/",
              "headers": {
                "cache-control": "max-age=600",
                "content-length": "1256",
                "content-type": "text/html; charset=UTF-8",
                "server": "nginx"
              },
              "missing_security_headers": [
                "strict-transport-security",
                "content-security-policy"
              ],
              "redirect_chain": [
                {
                  "status_code": 301,
                  "url": "http://example.com"
                }
              ],
              "response_time_ms": 214,
              "status_code": 200,
              "url": "https://example.com"
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "body": {
                  "additionalProperties": false,
                  "properties": {
                    "follow_redirects": {
                      "description": "Whether to follow redirects to their final destination or stop at the first one",
                      "type": "boolean"
                    },
                    "method": {
                      "description": "Either GET or HEAD; GET fetches the page normally, HEAD only asks for headers without the body",
                      "type": "string"
                    },
                    "url": {
                      "description": "The full web address to check, including http:// or https://",
                      "type": "string"
                    }
                  },
                  "required": [
                    "url"
                  ],
                  "type": "object"
                },
                "bodyType": {
                  "enum": [
                    "json",
                    "form-data",
                    "text"
                  ],
                  "type": "string"
                },
                "method": {
                  "enum": [
                    "POST",
                    "PUT",
                    "PATCH"
                  ],
                  "type": "string"
                },
                "type": {
                  "const": "http",
                  "type": "string"
                }
              },
              "required": [
                "type",
                "method",
                "bodyType",
                "body"
              ],
              "type": "object"
            },
            "output": {
              "properties": {
                "example": {
                  "properties": {
                    "api_version": {
                      "type": "string"
                    },
                    "final_url": {
                      "type": "string"
                    },
                    "headers": {
                      "additionalProperties": true,
                      "type": "object"
                    },
                    "missing_security_headers": {
                      "items": {
                        "type": "string"
                      },
                      "type": "array"
                    },
                    "redirect_chain": {
                      "items": {
                        "type": "object"
                      },
                      "type": "array"
                    },
                    "response_time_ms": {
                      "type": "integer"
                    },
                    "status_code": {
                      "type": "integer"
                    },
                    "url": {
                      "type": "string"
                    }
                  },
                  "required": [
                    "api_version",
                    "url",
                    "final_url",
                    "status_code",
                    "redirect_chain",
                    "headers",
                    "missing_security_headers",
                    "response_time_ms"
                  ],
                  "type": "object"
                },
                "type": {
                  "type": "string"
                }
              },
              "required": [
                "type"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      }
    }
  },
  "liveness": {
    "reliability": null
  },
  "verified": false,
  "featured": false,
  "provider": {
    "host": "http-header-checker.underscoredone.com",
    "manifest_name": "http-header-checker.underscoredone.com",
    "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": {
      "api_version": "string",
      "final_url": "string",
      "headers": {},
      "missing_security_headers": [
        "string"
      ],
      "redirect_chain": [
        {}
      ],
      "response_time_ms": 0,
      "status_code": 0,
      "url": "string"
    },
    "type": "string"
  }
}