Tanod Text

utilpeek: diff two texts (line, word or character)

diff_text

Read-onlyIdempotent

utilpeek: Diff two texts: unified line diff, word or character changes. Returns the differences between two texts: similarity ratio, counts and hunks; in line mode a git-compatible unified diff, in word or char mode change records (equal, insert, delete, replace) with exact character offsets into a and b. Input: a and b, optional mode and context. At most 1,000 hunks and 5,000 change records, then truncated. Parsed in an isolated, resource-limited child process without network; input over its limits is a 422 (not charged). Typically under 0.5 s. 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. Docs: https://tanod.dev/learn/text-diff-api.html

Input Schema

TableJSON Schema

Name	Required	Description	Default
`a`	Yes	The old text (at most 100,000 characters).
`b`	Yes	The new text (at most 100,000 characters).
`mode`	No	line (default; a unified diff), word or char (at most 20,000 characters per side).	line
`context`	No	Unchanged lines around each hunk (0-10, default 3).

Output Schema

TableJSON Schema

Name	Required	Description
`mode`	No
`error`	No	Only on an error result: an object {code, message}, or the reason string of an x402 PaymentRequired object.
`hunks`	No
`stats`	No
`source`	No
`changes`	No
`context`	No
`unified`	No
`identical`	No
`truncated`	No
`similarity`	No

Schema Changelog

Changes observed during successful MCP inspections.

Changed1 schema field changedOct 8, 2026

changedOutput schema / (root)

Previous value: -nullNew value: +{
+  "properties": {
+    "changes": {
+      "items": {
+        "type": [
+          "object",
+          "null"
+        ]
+      },
+      "type": [
+        "array",
+        "null"
+      ]
+    },
+    "context": {
+      "type": [
+        "integer",
+        "null"
+      ]
+    },
+    "error": {
+      "description": "Only on an error result: an object {code, message}, or the reason string of an x402 PaymentRequired object."
+    },
+    "hunks": {
+      "items": {
+        "type": [
+          "object",
+          "null"
+        ]
+      },
+      "type": [
+        "array",
+        "null"
+      ]
+    },
+    "identical": {
+      "type": [
+        "boolean",
+        "null"
+      ]
+    },
+    "mode": {
+      "type": [
+        "string",
+        "null"
+      ]
+    },
+    "similarity": {
+      "type": [
+        "number",
+        "null"
+      ]
+    },
+    "source": {
+      "properties": {
+        "library": {
+          "type": [
+            "string",
+            "null"
+          ]
+        },
+        "license": {
+          "type": [
+            "string",
+            "null"
+          ]
+        }
+      },
+      "type": [
+        "object",
+        "null"
+      ]
+    },
+    "stats": {
+      "properties": {
+        "a_units": {
+          "type": [
+            "integer",
+            "null"
+          ]
+        },
+        "b_units": {
+          "type": [
+            "integer",
+            "null"
+          ]
+        },
+        "deleted": {
+          "type": [
+            "integer",
+            "null"
+          ]
+        },
+        "inserted": {
+          "type": [
+            "integer",
+            "null"
+          ]
+        },
+        "unchanged": {
+          "type": [
+            "integer",
+            "null"
+          ]
+        },
+        "units": {
+          "type": [
+            "string",
+            "null"
+          ]
+        }
+      },
+      "type": [
+        "object",
+        "null"
+      ]
+    },
+    "truncated": {
+      "type": [
+        "boolean",
+        "null"
+      ]
+    },
+    "unified": {
+      "type": [
+        "string",
+        "null"
+      ]
+    }
+  },
+  "type": "object"
+}

First observedOct 8, 2026

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