Sprite tools
Sprite tools: Cut a sprite, prop or character out of its background: exact keying for one-color backgrounds (text and holes too), AI segmentation for busy ones; clean edges with no halo, trimmed, with a pivot. AI mode handles one main subject, not text on photos. Full schema: https://rengi.dev/v1/sprite-tools/schema
Answeringour last check, 2026-10-21
1 of 1checks answered this week
925 msmedian answer time
$0.05listed price per call
$0.05price 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://rengi.dev/v1/sprite-tools/remove-bg
| Category | Everything else |
|---|---|
| Provider host | rengi.dev |
| Networks | eip155:8453, solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp |
| 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 |
|---|---|---|---|---|
| 2026-10-21 | valid payment request | 402 | $0.05 | 925 ms |
Example input (from the provider)
{
"body": {
"imageUrl": "https://rengi.dev/samples/prop-on-white.png"
},
"bodyType": "json",
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"additionalProperties": false,
"properties": {
"image": {
"description": "Base64 PNG, JPEG or WebP.",
"type": "string"
},
"imageUrl": {
"format": "uri",
"type": "string"
},
"keep": {
"default": "auto",
"description": "main: only the main subject and what touches it; all: everything that is not background. auto: all for flat backgrounds, main after AI.",
"enum": [
"auto",
"main",
"all"
],
"type": "string"
},
"mode": {
"default": "auto",
"description": "auto: flat key when the border is one color, AI segmentation otherwise.",
"enum": [
"auto",
"flat",
"ai"
],
"type": "string"
},
"padding": {
"default": 2,
"maximum": 256,
"minimum": 0,
"type": "integer"
},
"pivot": {
"default": "bottom",
"enum": [
"bottom",
"center"
],
"type": "string"
},
"trim": {
"default": true,
"type": "boolean"
}
},
"type": "object"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
},
"method": {
"enum": [
"POST"
],
"type": "string"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method",
"bodyType",
"body"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"additionalProperties": false,
"properties": {
"backgroundColor": {
"type": [
"string",
"null"
]
},
"box": {
"additionalProperties": false,
"description": "Where the result sits in the source image.",
"properties": {
"h": {
"type": "number"
},
"w": {
"type": "number"
},
"x": {
"type": "number"
},
"y": {
"type": "number"
}
},
"required": [
"x",
"y",
"w",
"h"
],
"type": "object"
},
"height": {
"type": "number"
},
"image": {
"type": "string"
},
"mask": {
"type": "string"
},
"mode": {
"enum": [
"flat",
"ai",
"existing"
],
"type": "string"
},
"pivot": {
"additionalProperties": false,
"description": "Normalized, Unity convention (0,0 = bottom-left).",
"properties": {
"x": {
"type": "number"
},
"y": {
"type": "number"
}
},
"required": [
"x",
"y"
],
"type": "object"
},
"pivotPx": {
"additionalProperties": false,
"description": "Pixels from the top-left of the result.",
"properties": {
"x": {
"type": "number"
},
"y": {
"type": "number"
}
},
"required": [
"x",
"y"
],
"type": "object"
},
"preview": {
"type": "string"
},
"warnings": {
"items": {
"type": "string"
},
"type": "array"
},
"width": {
"type": "number"
}
},
"required": [
"image",
"mask",
"preview",
"mode",
"backgroundColor",
"width",
"height",
"box",
"pivot",
"pivotPx",
"warnings"
],
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}