{"uid":"cap_F3TIG5CiQZUMMU79G0jtx","slug":"synthora-llm-gateway-fast-a5e091d1","name":"SYNTHORA LLM Gateway Fast","description":"SYNTHORA LLM Gateway FAST: OpenAI-compatible /v1/chat/completions pay-per-call, no API keys. Fast free-tier models (llama-3.1-8b class) with automatic upstream failover, Ed25519-signed. 0.005 USDC via x402 on Base. POST {\"messages\":[{\"role\":\"user\",\"content\":\"...\"}]} (or {\"prompt\":\"...\"}).","url":"https://llm-fast.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_fast","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_QX6i4OIECpIcHeibWzOHS","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 using fast free-tier models (Llama-3.1-8B class) with automatic upstream failover, pay-per-call via x402 on Base","exampleAgentPrompt":"Send this to the SYNTHORA fast LLM gateway: 'Summarize the key differences between REST and GraphQL in three bullet points' — keep it under 300 tokens.","exampleUseCases":[{"title":"Quick LLM inference in agentic pipeline","prompt":"I need a fast, cheap LLM call right now — ask 'What are three creative names for a productivity app aimed at remote teams?' and keep the response under 200 tokens."},{"title":"Dynamic prompt completion without API key","prompt":"Run this prompt through a pay-per-call Llama model: system prompt is 'You are a concise legal assistant', user message is 'Explain force majeure in plain English'. Max 256 tokens."},{"title":"Fallback LLM generation with failover","prompt":"Use a reliable LLM gateway with automatic failover to answer this for my chatbot: 'How do I reset a user's password securely?' — I need a quick response, temperature 0.3, around 150 tokens."}],"resultDescription":"An OpenAI-compatible chat completion JSON object containing the assistant's generated message, finish reason, token usage counts, and model identifier. The response mirrors the OpenAI /v1/chat/completions response schema.","failureModes":["Payment not received or x402 handshake fails — returns 402 Payment Required","Upstream model providers unavailable and failover exhausted — returns 503","Input exceeds token limits (max_tokens capped at 1024) — may truncate or error","Malformed messages array or missing required fields — returns 400 Bad Request","Rate limiting on fast tier — returns 429 Too Many Requests"],"whenToPreferThis":"Choose this endpoint when you need a fast, cheap, OpenAI-compatible LLM completion without managing API keys or subscriptions — ideal for agentic workflows that make sporadic or unpredictable LLM calls and want pay-per-call micropayment pricing on Base via x402. Prefer this over OpenAI directly when you want no credential management overhead and can accept Llama-3.1-8B quality output. The automatic upstream failover makes it more resilient than a single-provider setup for latency-sensitive agent tasks.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T18:37:19.315Z","isFirstParty":false}