Compare two pieces of text
See exactly what changed between two versions, line by line, with additions and removals marked.
The original text.
The text to compare it against.
Needs A and B.
What it does
Also called: compare two pieces of text · find the difference between two texts · text comparison tool.
Use it from your own code
The same endpoint this page calls — no daily cap, 1 credit a call either way.
POST /v1/core/text-diff
curl -X POST "$DOATHING_API/v1/core/text-diff" \
-H "x-api-key: $DOATHING_KEY" \
-H "content-type: application/json" \
-d '{"a": "one\ntwo\n", "b": "one\nthree\n"}'
See exactly what changed between two versions, line by line, with additions and removals marked.
Unified or context diff between two texts, with optional whitespace-insensitive comparison.
Response
The result carries your remaining balance alongside it, so you can track spend without a second call.
{
"diff": "--- a\n+++ b\n@@ -1,2 +1,2 @@\n one\n-two\n+three",
"added": 1,
"removed": 1,
"identical": false,
"request_id": "37f01edb-0163-42a1-ac51-0acaef979800",
"credits_remaining": 96
}
Cost
1 credit per call, whether it is run from the site or from the API — the credential differs, the price does not. A new account starts with 20 credits.
A rejected request still costs a credit: the authorizer decrements before the tool validates. A call rejected for a missing or invalid key is free.
Parameters
Generated from the endpoint’s own validation, so this is exactly what it accepts. A body field goes at the top level; an option goes inside options.
| Name | In | Type | Default | Notes |
|---|---|---|---|---|
| a * | body | string | — | The original text. |
| b * | body | string | — | The text to compare it against. |
| ignore_whitespace | options | boolean | false | Compare lines with leading and trailing space removed. |
| context_lines | options | integer | 3 | Lines of unchanged context around each change. 0 to 100 |