curl --request POST 'https://api.voicecheap.ai/v1/actions/thumbnails_download' \
--header "x-api-key: $VOICECHEAP_API_KEY" \
--header 'Content-Type: application/json' \
--data '{"generationId":"109c61cb35dbdc01a94aabb3b1a128519ed1f8823800a7a327b9d8d8c2c0e10b"}'
const input = {
generationId: '109c61cb35dbdc01a94aabb3b1a128519ed1f8823800a7a327b9d8d8c2c0e10b',
};
const response = await fetch('https://api.voicecheap.ai/v1/actions/thumbnails_download', {
method: 'POST',
headers: {
'x-api-key': process.env.VOICECHEAP_API_KEY,
'Content-Type': 'application/json',
},
body: JSON.stringify(input),
});
const body = await response.json();
if (!response.ok) throw new Error(body.code + ': ' + body.message);
console.log(body);
import os
import requests
response = requests.post(
"https://api.voicecheap.ai/v1/actions/thumbnails_download",
headers={"x-api-key": os.environ["VOICECHEAP_API_KEY"]},
json={"generationId": "109c61cb35dbdc01a94aabb3b1a128519ed1f8823800a7a327b9d8d8c2c0e10b"},
timeout=120,
)
body = response.json()
if not response.ok:
raise RuntimeError(f"{body.get('code')}: {body.get('message')}")
print(body)
{
"data": {
"generationId": "109c61cb35dbdc01a94aabb3b1a128519ed1f8823800a7a327b9d8d8c2c0e10b",
"mimeType": "image/webp",
"data": "UklGRiQAAABXRUJQVlA4IBgAAAAwAQCdASoBAAEAAUAmJaQAA3AA/vxvIAA="
}
}
Thumbnails
Download a generated thumbnail
Retrieve an owned, unexpired thumbnail. Returns a WebP image as base64 in data with its mimeType, or native image content over MCP. Images up to 8 MiB are supported.
POST
/
v1
/
actions
/
thumbnails_download
curl --request POST 'https://api.voicecheap.ai/v1/actions/thumbnails_download' \
--header "x-api-key: $VOICECHEAP_API_KEY" \
--header 'Content-Type: application/json' \
--data '{"generationId":"109c61cb35dbdc01a94aabb3b1a128519ed1f8823800a7a327b9d8d8c2c0e10b"}'
const input = {
generationId: '109c61cb35dbdc01a94aabb3b1a128519ed1f8823800a7a327b9d8d8c2c0e10b',
};
const response = await fetch('https://api.voicecheap.ai/v1/actions/thumbnails_download', {
method: 'POST',
headers: {
'x-api-key': process.env.VOICECHEAP_API_KEY,
'Content-Type': 'application/json',
},
body: JSON.stringify(input),
});
const body = await response.json();
if (!response.ok) throw new Error(body.code + ': ' + body.message);
console.log(body);
import os
import requests
response = requests.post(
"https://api.voicecheap.ai/v1/actions/thumbnails_download",
headers={"x-api-key": os.environ["VOICECHEAP_API_KEY"]},
json={"generationId": "109c61cb35dbdc01a94aabb3b1a128519ed1f8823800a7a327b9d8d8c2c0e10b"},
timeout=120,
)
body = response.json()
if not response.ok:
raise RuntimeError(f"{body.get('code')}: {body.get('message')}")
print(body)
{
"data": {
"generationId": "109c61cb35dbdc01a94aabb3b1a128519ed1f8823800a7a327b9d8d8c2c0e10b",
"mimeType": "image/webp",
"data": "UklGRiQAAABXRUJQVlA4IBgAAAAwAQCdASoBAAEAAUAmJaQAA3AA/vxvIAA="
}
}
Retrieve an owned, unexpired thumbnail. Returns a WebP image as base64 in data with its mimeType, or native image content over MCP. Images up to 8 MiB are supported.
Required permissions:
POST https://api.voicecheap.ai/v1/actions/thumbnails_download
Authentication and permissions
string
required
Send a VoiceCheap API key in this header. Authorization: Bearer with the same API key is also supported. OAuth access tokens are accepted only by
MCP, not by this REST endpoint.
thumbnails:read.
An active paid subscription is required. Permissions do not change team roles, resource ownership, media credits, or plan limits.
Parameters
string
required
Generation ID returned by a generation or history action.Pattern:
^[A-Za-z0-9_-]{1,128}$.Complete input schema
Complete input schema
The JSON Schema below preserves the exact field names, nested types, defaults, bounds, and accepted values exposed by discovery. Additional cross-field rules are listed in the operation notes.
{
"type": "object",
"properties": {
"generationId": {
"type": "string",
"pattern": "^[A-Za-z0-9_-]{1,128}$",
"description": "Generation ID returned by a generation or history action."
}
},
"required": ["generationId"],
"additionalProperties": false
}
Request examples
Replace example resource identifiers and media keys with values returned for your account. Keep the request identifier stable when retrying the same mutation.curl --request POST 'https://api.voicecheap.ai/v1/actions/thumbnails_download' \
--header "x-api-key: $VOICECHEAP_API_KEY" \
--header 'Content-Type: application/json' \
--data '{"generationId":"109c61cb35dbdc01a94aabb3b1a128519ed1f8823800a7a327b9d8d8c2c0e10b"}'
const input = {
generationId: '109c61cb35dbdc01a94aabb3b1a128519ed1f8823800a7a327b9d8d8c2c0e10b',
};
const response = await fetch('https://api.voicecheap.ai/v1/actions/thumbnails_download', {
method: 'POST',
headers: {
'x-api-key': process.env.VOICECHEAP_API_KEY,
'Content-Type': 'application/json',
},
body: JSON.stringify(input),
});
const body = await response.json();
if (!response.ok) throw new Error(body.code + ': ' + body.message);
console.log(body);
import os
import requests
response = requests.post(
"https://api.voicecheap.ai/v1/actions/thumbnails_download",
headers={"x-api-key": os.environ["VOICECHEAP_API_KEY"]},
json={"generationId": "109c61cb35dbdc01a94aabb3b1a128519ed1f8823800a7a327b9d8d8c2c0e10b"},
timeout=120,
)
body = response.json()
if not response.ok:
raise RuntimeError(f"{body.get('code')}: {body.get('message')}")
print(body)
Response
A successful first execution returns HTTP 200 with the operation result under data. A replay may return saved request state instead. The example shows one supported response, not every optional field. The generated WebP returned as a base64 string in data, accompanied by generationId and mimeType. This is a JSON object, not a binary HTTP body or download URL.{
"data": {
"generationId": "109c61cb35dbdc01a94aabb3b1a128519ed1f8823800a7a327b9d8d8c2c0e10b",
"mimeType": "image/webp",
"data": "UklGRiQAAABXRUJQVlA4IBgAAAAwAQCdASoBAAEAAUAmJaQAA3AA/vxvIAA="
}
}
Result fields
| Field | Description |
|---|---|
data.generationId | Identifier of the downloaded generation. |
data.mimeType | image/webp. |
data.data | Base64-encoded WebP bytes with no data: URL prefix. |
Operation notes
- Requires thumbnails:read. generationId must contain 1–128 ASCII letters, digits, underscores, or hyphens.
- This action uses the connected user’s own creations and uploads, including when the credential is connected in a team context.
- The thumbnail must be claimed by the connected user, have claimed status in storage, and remain unexpired. New account thumbnails are retained for seven days; check expiresAt for each result.
- The decoded WebP must be at most 8 MiB (8,388,608 bytes). Base64 encoding makes the JSON string larger than the binary file.
- Decode data as base64 to save the WebP. There is no data: URL prefix. Over MCP the server emits native image content and a text block containing generationId instead of this ordinary JSON result.
Usage
Each successful invocation consumes one monthly API/MCP call. Media credits and the operation’s own generation allowances also apply.Errors
| HTTP status | Code | Meaning or recovery |
|---|---|---|
| 400 | CREDENTIAL_IN_QUERY | Credentials were supplied in an access_token or api_key query parameter. Send credentials in headers. |
| 400 | VALIDATION_ERROR | An argument is missing, has an unsupported value, exceeds its limit, or is not part of the strict input schema. |
| 401 | API_KEY_EXPIRED | The API key has expired. |
| 401 | INVALID_API_KEY | Provide a valid, unexpired API key. |
| 401 | INVALID_CREDENTIAL | The Authorization header is malformed or conflicts with x-api-key. |
| 401 | MISSING_CREDENTIAL | No usable header credential was supplied, or it exceeded 4096 characters. |
| 401 | USER_NOT_FOUND | The credential’s account no longer exists. |
| 403 | AMBIGUOUS_TEAM_API_KEY | The credential’s user belongs to more than one team, so the billing context is ambiguous. |
| 403 | INSUFFICIENT_SCOPE | Grant every required permission or choose another credential. |
| 403 | INTEGRATION_PLAN_UNSUPPORTED | The account’s integration limits could not be verified. |
| 403 | SUBSCRIPTION_REQUIRED | Use an active paid subscription. |
| 403 | TEAM_OWNER_NOT_FOUND | The effective team owner account could not be found. |
| 404 | THUMBNAIL_NOT_FOUND | The thumbnail is missing, unclaimed, unowned, deleted, or expired. |
| 413 | IMAGE_DOWNLOAD_TOO_LARGE | The generated thumbnail exceeds the 8 MiB integration download limit. |
| 429 | INTEGRATION_MONTHLY_LIMIT_REACHED | Wait for the monthly reset or change plan. |
| 429 | INTEGRATION_RATE_LIMIT_REACHED | Wait for Retry-After when present and use backoff. |
| 500 | INTERNAL_ERROR | Check saved request state and resource history before deciding to retry a mutation. |
| 503 | INTERNAL_ERROR | The stored thumbnail could not be retrieved or decoded. Retry the download later. |
| 503 | SERVER_RESTARTING | The server is restarting. Retry shortly and keep the same request identifier for a mutation. |
{
"code": "INSUFFICIENT_SCOPE",
"message": "This credential does not permit the requested action.",
"status": 403,
"details": {
"requiredScopes": ["thumbnails:read"]
}
}
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