# FarOut Kimi-K3 Chat Completions (x402 Pay-Per-Call)

> FarOut Kimi-K3 Chat Completions (x402 Pay-Per-Call) is a paid API for AI agents from farouter.tech, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-14).

Runs a single Kimi-K3 chat completion request, billing exactly $0.001 USDC per call via the x402 protocol on Base or Solana — no API key or account required.

## Facts

- Endpoint: POST https://farouter.tech/v1/metered/models/kimi-k3/chat/completions
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/farout-kimi-k3-chat-completions-x402-pay-per-call-d07a19e7
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_sSDnSRXCea9yF3TVXpBnp

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability farout-kimi-k3-chat-completions-x402-pay-per-call-d07a19e7 -d '<json body>'
```

Example prompt: Ask Kimi-K3 to summarize the following article in 3 bullet points, limit the output to 200 tokens, and charge me the micro-payment automatically: [article text]

## When to prefer this

Choose this endpoint when you need Kimi-K3 specifically (strong multilingual and long-context reasoning) and want true pay-per-call billing in USDC with no API account, no subscription, and no pre-purchased credits. Prefer it over OpenAI or Anthropic direct APIs when the caller is a crypto-native agent that can handle x402 payment flows, or when avoiding account creation is a hard requirement. Use a different sibling endpoint on farouter.tech if you prefer GPT, Gemini, DeepSeek, GLM, or MiniMax instead of Kimi.

## Known failure modes

- 402 Payment Required if wallet has insufficient USDC — the quote is returned but no charge is made
- 400 Bad Request if messages array is missing or malformed
- model not found if the model ID does not match an available metered model
- timeout or 503 if the upstream Kimi provider is unavailable
- stream connection drop if SSE streaming is enabled and the network is interrupted mid-response

## How this service works

Pay-per-call LLM inference over x402. Frontier models (GLM, GPT, Gemini, Kimi, DeepSeek, MiniMax) billed per request in USDC on Base or Solana mainnet. No API key, no account. The 402 quotes your exact request; failed calls are never charged.

## Output

Returns an OpenAI-compatible JSON object containing one or more choices, each with the assistant's message content and a finish_reason (e.g. 'stop'), plus a usage object reporting prompt_tokens and completion_tokens consumed.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "model": {
   "type": "string",
   "description": "Model id from GET /v1/metered/models, e.g. glm-5.3. No provider prefix."
  },
  "stream": {
   "type": "boolean",
   "description": "SSE streaming."
  },
  "messages": {
   "type": "array",
   "items": {
    "type": "object",
    "required": [
     "role",
     "content"
    ],
    "properties": {
     "role": {
      "enum": [
       "system",
       "user",
       "assistant",
       "tool"
      ],
      "type": "string"
     },
     "content": {
      "type": "string"
     }
    }
   },
   "description": "Chat messages, [OI]-compatible {role, content}."
  },
  "max_tokens": {
   "type": "integer",
   "description": "Output token budget. Drives the quote directly."
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "usage": {
   "prompt_tokens": 6,
   "completion_tokens": 8
  },
  "choices": [
   {
    "message": {
     "role": "assistant",
     "content": "Hello! How can I help?"
    },
    "finish_reason": "stop"
   }
  ]
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/farout-kimi-k3-chat-completions-x402-pay-per-call-d07a19e7/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from farouter.tech](https://www.zero.xyz/host/farouter.tech/llms.txt)