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Gambit Chat — Pay-per-call LLM via USDC on Base (x402)
x402
Gambit Chat — Pay-per-call LLM via USDC on Base (x402) is a paid API for AI agents from gambit.barrioenergy.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-13).
Sends a chat message to a GPU-hosted language model on Gambit, paid per-call with USDC on Base via the x402 protocol
Price / call$0.02
Success—
StatusUnknown
How this service works
Gambit GPU shop. Humans: /signup ($1 credit), X-API-Key on /v1/*, QR Lightning top-up. Bots: L402 Lightning (LIVE) on /l402/*, x402 USDC on Base on /x402/*, or POST /v1/register ($0) then POST /v1/topup/lightning. Handwritten letter POST /x402/letter at $25.00 USDC. Funnel https://gambit.barrioenergy.com. Free probe GET|POST /x402/models.
Output
Returns a JSON object containing the model name and an assistant message object with role and content fields — the generated text response from the GPU-hosted LLM.
Example use cases
Autonomous agent one-shot reasoning
“I want you to use Gambit's pay-per-call LLM to answer this question in under 200 tokens: 'What are three practical use cases for zero-knowledge proofs in DeFi?' — pay the $0.02 USDC fee from my Base wallet automatically.”
Crypto-native chatbot backend
“Route this user message to Gambit's GPU chat endpoint using the qwen3.6:35b-a3b model and return the assistant's reply — I want to pay per call in USDC on Base rather than run a subscription.”
LLM inference for a smart contract script
“Using Gambit, send the system message 'You are a Solidity auditor' and user message 'Review this snippet for reentrancy bugs: [code]' to the chat endpoint with max 512 tokens, and charge the $0.02 USDC fee to my Base address.”
Technical details
Endpoint
POSThttps://gambit.barrioenergy.com/x402/chatWhen to prefer
Choose this endpoint when you need a pay-per-call LLM inference endpoint that accepts USDC on Base via x402 — ideal for autonomous agents, bots, or scripts that need to avoid subscription management and prefer crypto micropayments. Prefer this over L402 Lightning endpoints if you already operate on Base/EVM. Avoid if you need streaming responses or guaranteed model availability at scale.
Side effects
- 402 Payment Required if USDC payment on Base is not provided or insufficient
- Invalid model name returns an error or empty response
- Malformed messages array (missing role or content) causes a 400 error
- Max tokens exceeded or model unavailable may cause timeouts or errors
- Insufficient USDC balance on Base results in payment failure
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| model | string | |
| messages | array | |
| max_tokens | integer |
Output
Schema · Response
{
"type": "json",
"example": {
"model": "qwen3.6:35b-a3b",
"message": {
"role": "assistant",
"content": "Hi."
}
}
}Tags
x402
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