Tanod Text

utilpeek: find and replace in text (literal or RE2 regex)

text_replace

Read-onlyIdempotent

utilpeek: Find and replace in text. Returns the text with find replaced: literally, or as a regular expression on RE2 only (linear time for any pattern: no backtracking, so no ReDoS; backreferences and lookaround are refused), with \1 / \g in the replacement; at most max_replacements (limit_reached reported). Input: text, find, replace, optional mode, case_sensitive, multiline, dot_all and max_replacements. A pattern RE2 cannot compile is a 422 invalid_pattern (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.

Input Schema

TableJSON Schema

Name	Required	Description	Default
`find`	Yes	Literal text, or an RE2 pattern (mode=regex; no backreferences or lookaround; \p{L} for letters).
`mode`	No	literal (default: find is plain text) or regex (find is an RE2 pattern).	literal
`text`	Yes	The text (at most 200,000 characters).
`dot_all`	No	regex: . also matches a newline.
`replace`	Yes	Replacement; regex mode: \1..\99, \g<name>, \\ for a backslash.
`multiline`	No	regex: ^ and $ match at line breaks.
`case_sensitive`	No	Match letter case exactly (default true); false ignores case.
`max_replacements`	No	Replace at most this many matches, first to last (1-10,000, default 10,000).

Output Schema

TableJSON Schema

Name	Required	Description
`mode`	No
`text`	No
`error`	No	Only on an error result: an object {code, message}, or the reason string of an x402 PaymentRequired object.
`engine`	No
`source`	No
`replacements`	No
`limit_reached`	No

Schema Changelog

Changes observed during successful MCP inspections.

Changed4 schema fields changedOct 8, 2026

addedInput schema / properties / case_sensitive / description

Added value: +"Match letter case exactly (default true); false ignores case."

addedInput schema / properties / max_replacements / description

Added value: +"Replace at most this many matches, first to last (1-10,000, default 10,000)."

addedInput schema / properties / mode / description

Added value: +"literal (default: find is plain text) or regex (find is an RE2 pattern)."

changedOutput schema / (root)

Previous value: -nullNew value: +{
+  "properties": {
+    "engine": {
+      "type": [
+        "string",
+        "null"
+      ]
+    },
+    "error": {
+      "description": "Only on an error result: an object {code, message}, or the reason string of an x402 PaymentRequired object."
+    },
+    "limit_reached": {
+      "type": [
+        "boolean",
+        "null"
+      ]
+    },
+    "mode": {
+      "type": [
+        "string",
+        "null"
+      ]
+    },
+    "replacements": {
+      "type": [
+        "integer",
+        "null"
+      ]
+    },
+    "source": {
+      "type": [
+        "object",
+        "null"
+      ]
+    },
+    "text": {
+      "type": [
+        "string",
+        "null"
+      ]
+    }
+  },
+  "type": "object"
+}

First observedOct 8, 2026

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