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FarOut Kimi K3 Chat Completions (Pay-Per-Call via x402)
x402
FarOut Kimi K3 Chat Completions (Pay-Per-Call via x402) is a paid API for AI agents from farouter.tech, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-13).
Runs a Kimi K3 LLM chat completion request, billed per-call in USDC on Base via x402 — no API key or account required.
Price / call$0.002
Success—
StatusUnknown
How this service works
Fixed-price chat completions for kimi-k3 on FarOut: flat $0.002 per call (includes up to 4,000 input + 1,000 output tokens). Rate: $0.192/1M input tokens, $0.960/1M output tokens. Pay with USDC on Base using x402. No API key, no account, no prepaid balance.
Output
Returns an OpenAI-compatible JSON object with a choices array containing the assistant's reply message and finish_reason, plus a usage object with prompt_tokens and completion_tokens counts.
Example use cases
Agent-driven code review assistant
“Have Kimi K3 review this Python function for bugs and style issues, keep the reply under 300 tokens: def add(a,b): return a+b if a else 0”
Serverless reasoning for autonomous pipeline
“I need Kimi K3 to reason step-by-step through this math problem and return the answer with workings — max 400 tokens, temperature 0: 'A train leaves at 60 mph and another at 80 mph from cities 280 miles apart, when do they meet?'”
No-account chatbot backend for a demo app
“Send a user message to Kimi K3 saying 'What are the top 3 benefits of renewable energy?' — keep it under 200 tokens so we keep costs low.”
Technical details
Endpoint
POSThttps://farouter.tech/v1/models/kimi-k3/chat/completionsWhen to prefer
Choose this endpoint when you need Kimi K3 specifically (known for long-context reasoning and multilingual tasks), want pay-per-call billing in USDC with no account or API key setup, or are building an autonomous agent that needs to self-fund LLM calls via x402 micropayments on Base. It is ideal for sporadic, low-volume, or cost-sensitive workloads where prepaid subscriptions are wasteful.
Side effects
- Payment rejected or insufficient USDC balance — x402 payment required error
- Invalid or unsupported model ID returns 400 bad request
- messages array missing or empty — schema validation error
- max_tokens set too low, causing truncated or empty response
- Rate limiting or quota exceeded on the upstream Kimi K3 provider
- Network timeout on long-running reasoning completions
- Malformed content in messages causes 422 unprocessable entity
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| model | string | Model id from GET /v1/models, e.g. glm-5.3. No provider prefix. |
| stream | boolean | SSE streaming. |
| messages | array | Chat messages, [OI]-compatible {role, content}. |
| max_tokens | integer | Output token budget. Sets your spending cap; actual usage is what gets settled (true-up). |
| temperature | number | Sampling temperature. |
| max_completion_tokens | integer | Alias of max_tokens (gpt-5.x models). |
Output
Schema · Response
{
"type": "json",
"example": {
"usage": {
"prompt_tokens": 6,
"completion_tokens": 8
},
"choices": [
{
"message": {
"role": "assistant",
"content": "Hello! How can I help?"
},
"finish_reason": "stop"
}
]
}
}Tags
x402
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