Tanod ML

utilpeek: detect the language of a text

detect_language

Read-onlyIdempotent

utilpeek: Detect the language of a text. Returns the most likely language (ISO 639-1 and 639-3 code, name, confidence) and 3 alternatives, from an offline ensemble of lingua (Apache-2.0) and langid.py (BSD-2-Clause) over 75 languages; reliable is true only with at least 20 letters and confidence 0.6 or more. Input: text. Short text is often flagged unreliable; text with no letters is a 422 no_text (not charged). Typically under 0.1 s (a few seconds on the worker's first call). Price: USD 0.001. Free: 10 utilpeek calls per IP per UTC day. Tanod does not log or store the submitted text; it is processed in memory for this answer.

Input Schema

TableJSON Schema

Name	Required	Description	Default
`text`	Yes	The text (at most 20,000 characters).

Output Schema

TableJSON Schema

Name	Required	Description
`note`	No
`error`	No	Only on an error result: an object {code, message}, or the reason string of an x402 PaymentRequired object.
`source`	No
`letters`	No
`language`	No
`reliable`	No
`alternatives`	No
`chars_analyzed`	No
`languages_supported`	No

Schema Changelog

Changes observed during successful MCP inspections.

Changed1 schema field changedOct 8, 2026

changedOutput schema / (root)

Previous value: -nullNew value: +{
+  "properties": {
+    "alternatives": {
+      "items": {
+        "properties": {
+          "code": {
+            "type": [
+              "string",
+              "null"
+            ]
+          },
+          "confidence": {
+            "type": [
+              "number",
+              "null"
+            ]
+          },
+          "iso639_3": {
+            "type": [
+              "string",
+              "null"
+            ]
+          },
+          "name": {
+            "type": [
+              "string",
+              "null"
+            ]
+          }
+        },
+        "type": [
+          "object",
+          "null"
+        ]
+      },
+      "type": [
+        "array",
+        "null"
+      ]
+    },
+    "chars_analyzed": {
+      "type": [
+        "integer",
+        "null"
+      ]
+    },
+    "error": {
+      "description": "Only on an error result: an object {code, message}, or the reason string of an x402 PaymentRequired object."
+    },
+    "language": {
+      "properties": {
+        "code": {
+          "type": [
+            "string",
+            "null"
+          ]
+        },
+        "confidence": {
+          "type": [
+            "number",
+            "null"
+          ]
+        },
+        "iso639_3": {
+          "type": [
+            "string",
+            "null"
+          ]
+        },
+        "name": {
+          "type": [
+            "string",
+            "null"
+          ]
+        }
+      },
+      "type": [
+        "object",
+        "null"
+      ]
+    },
+    "languages_supported": {
+      "type": [
+        "integer",
+        "null"
+      ]
+    },
+    "letters": {
+      "type": [
+        "integer",
+        "null"
+      ]
+    },
+    "note": {
+      "type": [
+        "string",
+        "null"
+      ]
+    },
+    "reliable": {
+      "type": [
+        "boolean",
+        "null"
+      ]
+    },
+    "source": {
+      "properties": {
+        "library": {
+          "type": [
+            "string",
+            "null"
+          ]
+        },
+        "license": {
+          "type": [
+            "string",
+            "null"
+          ]
+        }
+      },
+      "type": [
+        "object",
+        "null"
+      ]
+    }
+  },
+  "type": "object"
+}

First observedOct 8, 2026

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