{"uid":"cap_D3eb99ouemIbD02xfxGx_","slug":"synthora-llm-gateway-smart-58531ca0","name":"SYNTHORA LLM Gateway SMART","description":"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\":\"...\"}).","url":"https://llm-smart.hergertsynthora.com/v1/chat/completions","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"model":{"type":"string","description":"Etiqueta aceptada; el tier fija el modelo real"},"prompt":{"type":"string","description":"Atajo sin messages"},"system":{"type":"string","description":"System prompt opcional (con prompt)"},"messages":{"type":"array","items":{"type":"object"},"description":"OpenAI chat messages"},"max_tokens":{"type":"integer","description":"Max output tokens (default 256, cap 1024)"},"temperature":{"type":"number"}}},"responseSchema":{"type":"json","example":{"ok":true,"niche":"llm_smart","result":{},"receipt":{"alg":"ed25519"}}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.005","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.005/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_Ju7CdXFs3AGtLEsWgQ84z","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.005","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"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)","exampleAgentPrompt":"Ask the SYNTHORA SMART gateway to explain the difference between supervised and unsupervised learning in 3 sentences, using the Llama-70b model — keep the response under 300 tokens.","exampleUseCases":[{"title":"On-demand AI answers in an agent pipeline","prompt":"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.'"},{"title":"Automated content drafting without subscription","prompt":"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."},{"title":"Rapid Q&A in a chatbot with failover reliability","prompt":"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."}],"resultDescription":"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.","failureModes":["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"],"whenToPreferThis":"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.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T12:38:34.013Z","isFirstParty":false}