Claude Opus 4.8
POST
/v1/messages
As low as 3% of official pricing, Start
Example: at 0.2 model rate, pay 10.00 → usable $50.00. Balance is usable across all models. Actual pricing is subject to the website display.
Claude Opus 4.8 API Documentation
Base URL
https://yesapi.online/v1Authentication
Model Name
| Field | Value |
|---|---|
| Model | claude-opus-4-8 |
| API type | chat completions API |
Request Endpoint
POST https://yesapi.online/v1/chat/completionsRequest Parameters
| Parameter | Type | Required | Default | Description |
|---|---|---|---|---|
model | string | Yes | - | Fixed value: claude-opus-4-8 |
prompt | string | No | - | Task prompt or instruction |
messages | array | Yes | - | Conversation messages for chat models |
stream | boolean | No | false | Enable streaming output for supported chat models |
callback_url | string | No | - | Callback URL for asynchronous media tasks |
Request Example
Response Example
{
"id": "task_or_response_example",
"model": "claude-opus-4-8",
"status": "succeeded",
"created": 1784534400
}Response Fields
| Field | Type | Description |
|---|---|---|
id | string | Request or task ID |
model | string | Model used for the request |
status | string | Task status for asynchronous APIs |
usage | object | Token or usage details when available |
error | object | Error details when the request fails |
Python Example
Node.js Example
Error Codes
| Status | Type | How to Fix |
|---|---|---|
400 | Invalid request | Check required fields and parameter formats |
401 | Unauthorized | Verify your API key and Authorization header |
402 | Insufficient balance | Check account balance or plan quota |
429 | Rate limited | Reduce concurrency or add retry backoff |
500 | Service error | Retry later and keep the request ID for support |
Best Practices
Related Links
Note: This API page documents the unified YesAPI request format. Users need to provide their own YesAPI API key when testing. Model availability depends on the current YesAPI console status.
As low as 3% of official pricing, Start
Example: at 0.2 model rate, pay 10.00 → usable $50.00. Balance is usable across all models. Actual pricing is subject to the website display.
Request
Body Params application/jsonRequired
Responses
Request Request Example
Shell
JavaScript
Java
Swift
curl --location '/v1/messages' \
--header 'Content-Type: application/json' \
--data '{
"model": "claude-opus-4-8",
"messages": [
{
"role": "user",
"content": "Explain how to integrate YesAPI in three points"
}
],
"temperature": 0.7,
"stream": false,
"max_tokens": 1024
}'Response Response Example
{
"id": "chatcmpl_example",
"object": "chat.completion",
"model": "claude-opus-4-8",
"choices": [
{
"index": 0,
"message": {
"role": "assistant",
"content": "You can integrate YesAPI with a Base URL, API key, and model name."
},
"finish_reason": "stop"
}
],
"usage": {
"prompt_tokens": 32,
"completion_tokens": 24,
"total_tokens": 56
}
}