Normalizes whitespace, inserts a caller-supplied visible marker after every sele
Normalizes whitespace, inserts a caller-supplied visible marker after every selected number of words and at the end of a final partial interval, then reports source and output digests. This deliberately visible text annotation is not a robust image, audio or cryptographic watermark and can be removed by editing.
Answeringour last check, 2026-09-24
1 of 1checks answered this week
891 msmedian answer time
$0.003listed price per call
$0.003price it asked us
Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.
Endpoint
POST https://creator.halowerk.com/v1/watermark-embed
| Category | Image and media |
|---|---|
| Provider host | creator.halowerk.com |
| Networks | eip155:8453 |
| Payment schemes | exact |
| Self-reported calls, 30 days | 1 from 1 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-09-24 | valid payment request | 402 | $0.003 | 891 ms |
Example input (from the provider)
{
"body": {
"interval_words": 5,
"text": "A deterministic marker makes provenance visible while keeping the transformation easy to audit and reverse.",
"watermark_label": "HALOWERK:demo-42"
},
"bodyType": "json",
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"additionalProperties": false,
"properties": {
"interval_words": {
"maximum": 1000,
"minimum": 1,
"type": "integer"
},
"text": {
"description": "Text to annotate.",
"maxLength": 10000,
"minLength": 1,
"type": "string"
},
"watermark_label": {
"maxLength": 64,
"minLength": 1,
"pattern": "^[A-Za-z0-9._:-]+$",
"type": "string"
}
},
"required": [
"text",
"watermark_label",
"interval_words"
],
"type": "object"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
},
"method": {
"enum": [
"POST",
"PUT",
"PATCH"
],
"type": "string"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method",
"bodyType",
"body"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}