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Toll402 LLM Chat Completion Gateway
x402
Toll402 LLM Chat Completion Gateway is a paid API for AI agents from toll402.dev, paid per call via x402, $0.00115/call, status unknown (last checked 2026-09-15).
Sends a chat completion request to an LLM via the Toll402 pay-per-call gateway, billed in USDC via x402 with no signup or API key required.
Price / call$0.00115
Success—
StatusUnknown
How this service works
The OpenRouter for AI-agent tools: one gateway, one wallet, every capability. Built-in tools, forged tools, a global verified business directory and 2,000+ aggregated x402 services, all paid per call in USDC via x402 (HTTP 402). No signup, no API key.
Output
Returns a standard LLM chat completion response containing the assistant's generated message, along with token usage metadata and the model used, matching the OpenAI-compatible chat completion response format.
Example use cases
Permissionless LLM call for an agent
“Call the Toll402 gateway with model claude-3-haiku, max 256 tokens, and these messages — system: 'You are a concise summarizer.', user: 'What are the three main causes of World War I?' — pay per call, no account needed.”
Crypto-native chatbot backend
“I'm building a crypto-native chatbot that pays per inference. Route this conversation to gpt-4o-mini via Toll402, limit to 1024 tokens: system 'You are a customer support agent for a DeFi protocol', user 'How do I connect my wallet?'”
Agent pipeline LLM step with micropayments
“In my agent pipeline, I need an LLM reasoning step — send these messages to a model of your choice via Toll402 and cap it at 512 tokens: user 'Given sales data Q1-Q4, identify the trend and recommend a strategy for next year.'”
Technical details
Endpoint
POSThttps://toll402.dev/v1/x/2dc439e9109cWhen to prefer
Choose Toll402 when you need a permissionless, no-signup LLM chat completion endpoint that bills per call in USDC via the x402 protocol — ideal for AI agents operating with a crypto wallet, pipelines that need to avoid API key management, or applications requiring micropayment-native LLM access. Prefer this over OpenAI or Anthropic direct APIs when you want a single gateway that aggregates multiple models without credential overhead.
Side effects
- Insufficient USDC balance triggers 402 Payment Required before the LLM call is made
- Invalid or unsupported model name returns an error from the gateway
- Malformed messages array (missing role or content fields) causes a validation error
- max_tokens set too low may result in truncated or incomplete responses
- Network timeout if the upstream LLM provider is slow to respond
- x402 payment protocol not supported by the calling client causes payment failure
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| model | string | |
| messagesrequired | array | |
| max_tokens | integer |
Tags
x402
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