Tanod Images

utilpeek: make a 1-D barcode image (SVG or PNG)

make_barcode

Read-onlyIdempotent

utilpeek: make a 1-D barcode image. Input: data, optional type, format and text. Returns svg (text, with width_mm/height_mm) or data_base64 (PNG, with width_px/height_px), plus encoded and bytes. A supplied check digit (ean13, ean8, upca, isbn13) must be right: a wrong one is a 422 invalid_checksum (not charged) rather than silently encoding a different number. Encoded locally; typically under 0.1 s. Price: USD 0.001. Free: 10 utilpeek calls per IP per UTC day.

Input Schema

TableJSON Schema

Name	Required	Description	Default
`data`	Yes	Value to encode (see the type rules).
`text`	No	Print the human-readable line (default true).
`type`	No	Symbology (default code128).	code128
`format`	No	svg (text) or png (base64).	svg

Output Schema

TableJSON Schema

Name	Required	Description
`svg`	No
`text`	No
`type`	No
`bytes`	No
`error`	No	Only on an error result: an object {code, message}, or the reason string of an x402 PaymentRequired object.
`format`	No
`source`	No
`encoded`	No
`width_mm`	No
`width_px`	No
`height_mm`	No
`height_px`	No
`data_base64`	No
`content_type`	No

Schema Changelog

Changes observed during successful MCP inspections.

Changed1 schema field changedOct 8, 2026

changedOutput schema / (root)

Previous value: -nullNew value: +{
+  "properties": {
+    "bytes": {
+      "type": [
+        "integer",
+        "null"
+      ]
+    },
+    "content_type": {
+      "type": [
+        "string",
+        "null"
+      ]
+    },
+    "data_base64": {
+      "type": [
+        "string",
+        "null"
+      ]
+    },
+    "encoded": {
+      "type": [
+        "string",
+        "null"
+      ]
+    },
+    "error": {
+      "description": "Only on an error result: an object {code, message}, or the reason string of an x402 PaymentRequired object."
+    },
+    "format": {
+      "enum": [
+        "svg",
+        "png",
+        null
+      ],
+      "type": [
+        "string",
+        "null"
+      ]
+    },
+    "height_mm": {
+      "type": [
+        "number",
+        "null"
+      ]
+    },
+    "height_px": {
+      "type": [
+        "integer",
+        "null"
+      ]
+    },
+    "source": {
+      "properties": {
+        "library": {
+          "type": [
+            "string",
+            "null"
+          ]
+        },
+        "license": {
+          "type": [
+            "string",
+            "null"
+          ]
+        },
+        "url": {
+          "type": [
+            "string",
+            "null"
+          ]
+        }
+      },
+      "type": [
+        "object",
+        "null"
+      ]
+    },
+    "svg": {
+      "type": [
+        "string",
+        "null"
+      ]
+    },
+    "text": {
+      "type": [
+        "boolean",
+        "null"
+      ]
+    },
+    "type": {
+      "enum": [
+        "code128",
+        "ean13",
+        "ean8",
+        "upca",
+        "isbn13",
+        "code39",
+        null
+      ],
+      "type": [
+        "string",
+        "null"
+      ]
+    },
+    "width_mm": {
+      "type": [
+        "number",
+        "null"
+      ]
+    },
+    "width_px": {
+      "type": [
+        "integer",
+        "null"
+      ]
+    }
+  },
+  "type": "object"
+}

First observedOct 8, 2026

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