{
  "openapi": "3.1.0",
  "info": {
    "title": "BenchReference API",
    "version": "1.0.0",
    "description": "Free JSON lookups against the BenchReference physical-standards dataset. All responses are JSON; all endpoints are GET; values trace to the standards cited on benchreference.com/sources/."
  },
  "servers": [
    {
      "url": "https://benchreference.com"
    }
  ],
  "paths": {
    "/api/search": {
      "get": {
        "summary": "Universal search",
        "description": "One query in, the same routing the site search box uses: designations (#7, 1/4-20, 6203-2RS, AS568-214, 1/2 NPT), measurements (17 x 40 x 12, .734 x .139, 1.315 od), and fastener callouts (1/4-20 x 1 SHCS).",
        "parameters": [
          {
            "name": "q",
            "in": "query",
            "required": true,
            "description": "The query string",
            "schema": {
              "type": "string"
            }
          }
        ],
        "responses": {
          "200": {
            "description": "JSON result",
            "content": {
              "application/json": {}
            }
          },
          "400": {
            "description": "Missing or unreadable parameters"
          }
        }
      }
    },
    "/api/drills/nearest": {
      "get": {
        "summary": "Nearest drills to a measurement",
        "description": "Ranked nearest standard drills in all four systems for a measured diameter.",
        "parameters": [
          {
            "name": "mm",
            "in": "query",
            "required": false,
            "description": "Measured diameter in millimeters",
            "schema": {
              "type": "string"
            }
          },
          {
            "name": "in",
            "in": "query",
            "required": false,
            "description": "Measured diameter in inches (alternative to mm)",
            "schema": {
              "type": "string"
            }
          }
        ],
        "responses": {
          "200": {
            "description": "JSON result",
            "content": {
              "application/json": {}
            }
          },
          "400": {
            "description": "Missing or unreadable parameters"
          }
        }
      }
    },
    "/api/threads/decode": {
      "get": {
        "summary": "Decode a thread designation",
        "description": "Thread family, dimensions, pitch, tap drill, and clearance holes for a callout like 1/4-20 or M8x1.25.",
        "parameters": [
          {
            "name": "q",
            "in": "query",
            "required": true,
            "description": "The thread designation",
            "schema": {
              "type": "string"
            }
          }
        ],
        "responses": {
          "200": {
            "description": "JSON result",
            "content": {
              "application/json": {}
            }
          },
          "400": {
            "description": "Missing or unreadable parameters"
          }
        }
      }
    },
    "/api/o-rings/nearest": {
      "get": {
        "summary": "Identify an O-ring from measurements",
        "description": "Closest AS568 dash numbers for a measured ID (or OD) and cross-section, grouped by CS series, with match quality.",
        "parameters": [
          {
            "name": "id",
            "in": "query",
            "required": false,
            "description": "Measured inside diameter, inches (or id_mm)",
            "schema": {
              "type": "string"
            }
          },
          {
            "name": "od",
            "in": "query",
            "required": false,
            "description": "Measured outside diameter, inches (or od_mm); requires cs",
            "schema": {
              "type": "string"
            }
          },
          {
            "name": "cs",
            "in": "query",
            "required": false,
            "description": "Measured cross-section, inches (or cs_mm)",
            "schema": {
              "type": "string"
            }
          }
        ],
        "responses": {
          "200": {
            "description": "JSON result",
            "content": {
              "application/json": {}
            }
          },
          "400": {
            "description": "Missing or unreadable parameters"
          }
        }
      }
    },
    "/api/pipe/nearest": {
      "get": {
        "summary": "Identify a pipe from a measured OD",
        "description": "Likely NPS sizes for a measured outside diameter, and the schedule for a measured wall.",
        "parameters": [
          {
            "name": "od",
            "in": "query",
            "required": true,
            "description": "Measured OD, inches (or od_mm)",
            "schema": {
              "type": "string"
            }
          },
          {
            "name": "wall",
            "in": "query",
            "required": false,
            "description": "Measured wall thickness, inches (optional)",
            "schema": {
              "type": "string"
            }
          }
        ],
        "responses": {
          "200": {
            "description": "JSON result",
            "content": {
              "application/json": {}
            }
          },
          "400": {
            "description": "Missing or unreadable parameters"
          }
        }
      }
    },
    "/api/bearings/nearest": {
      "get": {
        "summary": "Identify a bearing from measurements",
        "description": "Likely deep-groove designations for a measured bore, with optional OD and width, with per-dimension deltas and match quality.",
        "parameters": [
          {
            "name": "bore",
            "in": "query",
            "required": true,
            "description": "Measured bore, mm (or bore_in)",
            "schema": {
              "type": "string"
            }
          },
          {
            "name": "od",
            "in": "query",
            "required": false,
            "description": "Measured outside diameter, mm (optional)",
            "schema": {
              "type": "string"
            }
          },
          {
            "name": "width",
            "in": "query",
            "required": false,
            "description": "Measured width, mm (optional)",
            "schema": {
              "type": "string"
            }
          }
        ],
        "responses": {
          "200": {
            "description": "JSON result",
            "content": {
              "application/json": {}
            }
          },
          "400": {
            "description": "Missing or unreadable parameters"
          }
        }
      }
    }
  }
}