Tanod Util

utilpeek: parse a User-Agent string (browser, OS, device, bot)

parse_user_agent

Read-onlyIdempotent

utilpeek: parse a User-Agent string. Input: user_agent. Returns browser, os (family and version parts) and device (family, brand, model), is_bot with bot_reason, and is_mobile. A User-Agent is self-reported and easy to fake; is_bot is a heuristic (declared crawlers, HTTP libraries, headless browsers). Parsed with ua-parser and the uap-core regexes (Apache-2.0). Typically under 0.1 s (first call up to 0.5 s). Price: USD 0.001. Free: 10 utilpeek calls per IP per UTC day. Docs: https://tanod.dev/learn/user-agent-parser-api.html

Input Schema

TableJSON Schema

Name	Required	Description	Default
`user_agent`	Yes	User-Agent string (1-1024 chars).

Output Schema

TableJSON Schema

Name	Required	Description
`os`	No
`note`	No
`error`	No	Only on an error result: an object {code, message}, or the reason string of an x402 PaymentRequired object.
`device`	No
`is_bot`	No
`length`	No
`source`	No
`browser`	No
`is_mobile`	No
`bot_reason`	No

Schema Changelog

Changes observed during successful MCP inspections.

Changed1 schema field changedOct 8, 2026

changedOutput schema / (root)

Previous value: -nullNew value: +{
+  "properties": {
+    "bot_reason": {
+      "type": [
+        "string",
+        "null"
+      ]
+    },
+    "browser": {
+      "properties": {
+        "family": {
+          "type": [
+            "string",
+            "null"
+          ]
+        },
+        "major": {
+          "type": [
+            "string",
+            "null"
+          ]
+        },
+        "minor": {
+          "type": [
+            "string",
+            "null"
+          ]
+        },
+        "patch": {
+          "type": [
+            "string",
+            "null"
+          ]
+        },
+        "version": {
+          "type": [
+            "string",
+            "null"
+          ]
+        }
+      },
+      "type": [
+        "object",
+        "null"
+      ]
+    },
+    "device": {
+      "properties": {
+        "brand": {
+          "type": [
+            "string",
+            "null"
+          ]
+        },
+        "family": {
+          "type": [
+            "string",
+            "null"
+          ]
+        },
+        "model": {
+          "type": [
+            "string",
+            "null"
+          ]
+        }
+      },
+      "type": [
+        "object",
+        "null"
+      ]
+    },
+    "error": {
+      "description": "Only on an error result: an object {code, message}, or the reason string of an x402 PaymentRequired object."
+    },
+    "is_bot": {
+      "type": [
+        "boolean",
+        "null"
+      ]
+    },
+    "is_mobile": {
+      "type": [
+        "boolean",
+        "null"
+      ]
+    },
+    "length": {
+      "type": [
+        "integer",
+        "null"
+      ]
+    },
+    "note": {
+      "type": [
+        "string",
+        "null"
+      ]
+    },
+    "os": {
+      "properties": {
+        "family": {
+          "type": [
+            "string",
+            "null"
+          ]
+        },
+        "major": {
+          "type": [
+            "string",
+            "null"
+          ]
+        },
+        "minor": {
+          "type": [
+            "string",
+            "null"
+          ]
+        },
+        "patch": {
+          "type": [
+            "string",
+            "null"
+          ]
+        },
+        "version": {
+          "type": [
+            "string",
+            "null"
+          ]
+        }
+      },
+      "type": [
+        "object",
+        "null"
+      ]
+    },
+    "source": {
+      "properties": {
+        "library": {
+          "type": [
+            "string",
+            "null"
+          ]
+        },
+        "license": {
+          "type": [
+            "string",
+            "null"
+          ]
+        },
+        "regexes": {
+          "type": [
+            "string",
+            "null"
+          ]
+        },
+        "url": {
+          "type": [
+            "string",
+            "null"
+          ]
+        }
+      },
+      "type": [
+        "object",
+        "null"
+      ]
+    }
+  },
+  "type": "object"
+}

First observedOct 8, 2026

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