Text & Writing

Substring Extractor API

GET/v1/substring-extractor Free tier1 credit / call

Authentication

Send your API key as a bearer token. Create one free in the dashboard.

Authorization: Bearer $TOOLSXPO_KEY

Parameters

Passed as query-string parameters. Example values shown.

Name	Example
text	hello
extractMode	indices
startIndex	0
endIndex	10
startMarker	[
endMarker	]

Example request

curl "https://api.toolsxpo.com/v1/substring-extractor?text=hello&extractMode=indices&startIndex=0&endIndex=10&startMarker=%5B&endMarker=%5D" \
  -H "Authorization: Bearer $TOOLSXPO_KEY"

Response

A standard JSON envelope: { ok, data, meta }. The result is in data (text); meta.credits reports what the call cost.

Try it in the playground Open example URL