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Onchain Router – AI Model Routing via x402 USDC Payment
x402
Onchain Router – AI Model Routing via x402 USDC Payment is a paid API for AI agents from llm.agenticfi.wtf, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-14).
Routes LLM inference requests (text, image, speech) across Google Gemini model variants through a provider-neutral API, billing per-request in USDC with an on-chain receipt.
Price / call$0.002
Success—
StatusUnknown
How this service works
Anthropic-compatible request-priced llm inference · 0% service fee launch promotion
Output
Returns a JSON object with an assistant message containing the model's text response, the message ID, the model name used, role set to 'assistant', and a durable on-chain USDC payment receipt. The response follows the Anthropic Messages API shape (content array with text blocks).
Example use cases
Agent-to-agent LLM calls with crypto billing
“Have my automation agent call Gemini 2.5 Flash via the Onchain Router to summarize this support ticket and pay for each call automatically in USDC — limit each response to 1024 tokens.”
Web3-native chatbot backend
“Power my dapp's chatbot using Gemini 2.5 Pro through the Onchain Router so every inference is billed in USDC on-chain; set max tokens to 4096 and send the user's message as the prompt.”
Cost-tracked content generation pipeline
“Use the Onchain Router with Gemini 3.5 Flash to generate a product description for 'wireless noise-cancelling headphones,' cap it at 256 tokens, and make sure I get a receipt for the USDC charge.”
Technical details
Endpoint
POSThttps://llm.agenticfi.wtf/v1/messagesWhen to prefer
Choose this endpoint when you need to call Gemini LLM models without managing Google API keys directly, want per-request USDC billing with an on-chain receipt for auditability, are building a web3-native or agent-to-agent workflow that requires crypto-native payment rails, or want a provider-neutral API surface compatible with the Anthropic Messages format pointing at Google Gemini backends.
Side effects
- Insufficient USDC balance causes payment failure and a 402 Payment Required response
- Invalid or unsupported model enum value returns a 400 validation error
- max_tokens out of range (below 1 or above 65536) returns a schema validation error
- stream:true is not supported and returns an error (only stream:false is allowed)
- Empty or malformed messages array causes a 400 bad request
- Network or upstream Gemini provider outage results in a 503 or timeout
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| model | string | |
| stream | boolean | |
| messages | array | |
| max_tokens | integer |
Output
Schema · Response
{
"type": "json",
"example": {
"id": "msg_example",
"role": "assistant",
"type": "message",
"model": "gemini-3.6-flash",
"content": [
{
"text": "Hello",
"type": "text"
}
]
}
}Tags
x402
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