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SYNTHORA LLM Gateway SMART
x402
SYNTHORA LLM Gateway SMART is a paid API for AI agents from llm-smart.hergertsynthora.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-14).
OpenAI-compatible LLM chat completions endpoint with pay-per-call pricing via x402, automatic upstream failover, and large open-source models (Llama-3.3-70b class)
Price / call$0.005
Success—
StatusUnknown
How this service works
SYNTHORA LLM Gateway SMART: OpenAI-compatible /v1/chat/completions pay-per-call, no API keys. Large free-tier models (llama-3.3-70b class) with automatic upstream failover, Ed25519-signed. 0.005 USDC via x402 on Base. POST {"messages":[{"role":"user","content":"..."}]} (or {"prompt":"..."}).
Output
An OpenAI-compatible chat completion response containing the assistant's generated message, including the role, content, finish reason, and token usage. The response is Ed25519-signed by SYNTHORA for authenticity verification.
Example use cases
On-demand AI answers in an agent pipeline
“I need you to call an LLM that doesn't require an API key — ask it to summarize this paragraph in two sentences: 'Quantum computing leverages superposition and entanglement to perform calculations exponentially faster than classical computers for certain problem classes.'”
Automated content drafting without subscription
“Draft a 200-word product description for my new wireless noise-cancelling headphones called 'AuraFlow X1', aimed at commuters — use the pay-per-call SYNTHORA SMART endpoint so I don't need a monthly plan.”
Rapid Q&A in a chatbot with failover reliability
“Answer this customer support question using a large open-source model with automatic failover: 'How do I reset my password if I no longer have access to my old email?' Keep the reply under 150 tokens and use a helpful, friendly tone.”
Technical details
Endpoint
POSThttps://llm-smart.hergertsynthora.com/v1/chat/completionsWhen to prefer
Choose this endpoint when you need a large open-source LLM (Llama-3.3-70b class) without committing to an API key or subscription — ideal for agents that pay per call using x402 micropayments on Base. It is especially suitable for serverless or ephemeral agents that need OpenAI-compatible chat completions with built-in upstream failover, Ed25519-signed responses for auditability, and a very low per-call cost of $0.005 USDC.
Side effects
- Payment failure if x402 micropayment of 0.005 USDC on Base is not completed or wallet has insufficient balance
- Upstream model unavailability — though automatic failover is built in, all upstream providers may occasionally be degraded
- max_tokens cap at 1024 — requests asking for more will be silently capped
- Invalid message format — if neither 'messages' array nor 'prompt' string is provided, the request will likely fail
- Rate limiting or abuse throttling if too many calls are made in rapid succession
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| model | string | Etiqueta aceptada; el tier fija el modelo real |
| prompt | string | Atajo sin messages |
| system | string | System prompt opcional (con prompt) |
| messages | array | OpenAI chat messages |
| max_tokens | integer | Max output tokens (default 256, cap 1024) |
| temperature | number |
Output
Schema · Response
{
"type": "json",
"example": {
"ok": true,
"niche": "llm_smart",
"result": {},
"receipt": {
"alg": "ed25519"
}
}
}Tags
x402
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