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fittings Text Character Edit
x402
fittings Text Character Edit is a paid API for AI agents from fittings.sh, paid per call via x402, $0.0036/call, status unknown (last checked 2026-09-13).
Performs precise character-level operations (insert, delete, replace, extract, find, measure) on text strings using grapheme, code point, or UTF-16 unit counting, returning affected ranges in both chosen unit and UTF-16.
Price / call$0.0036
Success—
StatusUnknown
How this service works
Insert, delete, replace, extract, locate or measure at exact character offsets, counting by grapheme, code point or UTF-16 unit, with the affected range reported in both the chosen unit and UTF-16.
Output
Returns the result of the requested operation: for insert/delete/replace, the modified text string; for extract, the extracted substring; for find, the starting offset of the match; for measure, the character count. All responses include the affected range reported in both the chosen unit (grapheme, codepoint, or UTF-16) and in UTF-16 units.
Example use cases
Safe emoji string truncation
“I have the string '🎉🎊🎈Party time🎈🎊🎉' and I need to extract just the first 3 grapheme clusters — can you extract from offset 0 to 3 counting by grapheme so I don't accidentally split any emoji?”
Multilingual text insertion
“Take the Arabic string 'مرحبا عالم' and insert the word ' جميل' at grapheme offset 5, counting by grapheme cluster — what does the result look like?”
Offset-accurate substring search
“In the text 'The quick brown fox jumps', find the substring 'brown' starting from offset 4, counting by codepoint, and tell me where it starts.”
Technical details
Endpoint
POSThttps://fittings.sh/v1/text/char-editWhen to prefer
Choose this endpoint when you need to manipulate text at precise character-level offsets with correct Unicode semantics — especially when working with emoji, combining characters, or multilingual text where byte vs code-point vs grapheme distinctions matter. Prefer it over naive string-slicing code when you cannot risk splitting surrogate pairs or grapheme clusters, or when you need the affected range reported in both your chosen unit and UTF-16 for downstream compatibility.
Side effects
- Offset out of bounds returns an error if start/end/index exceeds text length
- Text exceeding 20,000 UTF-16 units is rejected
- Value exceeding 5,000 UTF-16 units for insert/replace is rejected
- Invalid op value returns a validation error
- Missing required parameters for the chosen operation (e.g. missing start/end for delete) return errors
- Invalid unit value returns a validation error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| op | string | insert | delete | replace | extract | find | measure |
| end | number | delete, replace, extract: offset just past the range |
| find | string | find: substring to locate |
| from | number | find: offset to start searching at, default 0 |
| text | string | Text to operate on, 20000 UTF-16 units or fewer |
| unit | string | grapheme | codepoint (default) | utf16 |
| index | number | insert: offset to insert before |
| start | number | delete, replace, extract: first offset in the range |
| value | string | insert, replace: text to put in, 5000 UTF-16 units or fewer |
Tags
x402
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