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FarOut GPT-5.4 Chat Completions via x402
x402
FarOut GPT-5.4 Chat Completions via x402 is a paid API for AI agents from farouter.tech, paid per call via x402, $0.00106/call, status unknown (last checked 2026-09-13).
Runs a GPT-5.4 chat completion request billed per-call in USDC via the x402 payment protocol — no API key or account required.
Price / call$0.00106
Success—
StatusUnknown
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
A JSON object matching the OpenAI chat completions response format: an array of choices each containing the assistant message (role + content) and finish_reason, plus a usage object with prompt_tokens and completion_tokens counts.
Example use cases
Autonomous agent calling LLM without API key
“I'm running an autonomous agent that needs to call GPT-5.4 to summarize user feedback — can you route that through FarOut and pay for each call in USDC on Base so I don't need to set up an OpenAI account?”
On-demand content drafting for a dApp
“Draft a short product description for my new NFT marketplace using GPT-5.4 on FarOut — charge the USDC fee per call and return the assistant's response directly.”
Crypto-native chatbot backend inference
“My chatbot needs to answer customer questions about DeFi protocols — use FarOut to send each conversation turn to GPT-5.4 and pay the micropayment in USDC on Solana for each request.”
Technical details
Endpoint
POSThttps://farouter.tech/v1/metered/models/gpt-5.4/chat/completionsWhen to prefer
Choose this endpoint when you need GPT-5.4 inference without an OpenAI account or pre-funded API key, particularly in autonomous agent or crypto-native contexts where per-call USDC micropayments on Base or Solana are preferable to subscription billing. Ideal for agents that call LLMs sporadically and want zero-setup, pay-as-you-go access with the guarantee that failed calls are never charged.
Side effects
- Payment insufficient or rejected — call not charged but request fails with 402
- Invalid or malformed messages array — 400 bad request
- Model identifier not recognized — endpoint returns error
- Network or blockchain congestion causes payment timeout
- Rate limiting or upstream OpenAI unavailability — 503 or 429 upstream error
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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Zero review prompt (fires after every successful call)
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