Generate an AI image from a text prompt using Google Gemini 3.1 Flash Image
Generate an AI image from a text prompt using Google Gemini 3.1 Flash Image. Returns base64-encoded PNG. Optional aspectRatio (1:1, 16:9, 9:16, 3:2, 2:3, 4:3, 3:4, 4:5, 5:4, 21:9). Backed by Google's Gemini image preview model — fast, high-quality, supports text rendering inside images.
Answeringour last check, 2026-09-24
1 of 1checks answered this week
383 msmedian answer time
$0.01listed price per call
$0.01price 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://nanobanana-x402.fly.dev/api/generate-image
| Category | Image and media |
|---|---|
| Provider host | nanobanana-x402.fly.dev |
| Networks | eip155:8453 |
| Payment schemes | exact |
| Self-reported calls, 30 days | 236 from 3 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-09-24 | valid payment request | 402 | $0.01 | 383 ms |
Example input (from the provider)
{
"body": {
"aspectRatio": "16:9",
"prompt": "A product hero image for a Telegram breach monitor, neon terminal style"
},
"bodyType": "json",
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"additionalProperties": false,
"properties": {
"aspectRatio": {
"description": "Output aspect ratio (default: 1:1)",
"enum": [
"1:1",
"16:9",
"9:16",
"3:2",
"2:3",
"4:3",
"3:4",
"4:5",
"5:4",
"21:9"
],
"type": "string"
},
"prompt": {
"description": "Text prompt describing the image to generate",
"minLength": 3,
"type": "string"
}
},
"required": [
"prompt"
],
"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": {
"properties": {
"aspectRatio": {
"type": "string"
},
"error": {
"description": "Present only on failure",
"type": "string"
},
"image_b64": {
"description": "Base64-encoded image bytes",
"type": "string"
},
"mime_type": {
"type": "string"
},
"model": {
"type": "string"
},
"ok": {
"type": "boolean"
}
},
"required": [
"ok"
],
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}