{"uid":"cap_KGgf-7ALU0QwTciI1i4yy","slug":"telnyx-x402-gateway-deepseek-v4-1-flash-chat-completions-0d11fad4","name":"Telnyx x402 Gateway — DeepSeek-V4.1-Flash Chat Completions","description":"Pay USDC per request for Telnyx Inference and Audio (text-to-speech, speech-to-text) through x402.","url":"https://x402.telnyx.com/v1/chat/completions/_t/deepseek-v4.1-flash?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"n":{"type":"integer","const":1,"description":"Fixed to one completion per paid call."},"model":{"type":"string","const":"deepseek-ai/DeepSeek-V4.1-Flash","description":"Model identifier; fixed to deepseek-ai/DeepSeek-V4.1-Flash on this route."},"tools":{"type":"array","items":{"type":"object"},"maxItems":16},"messages":{"type":"array","items":{"type":"object","required":["role","content"],"properties":{"role":{"enum":["system","user","assistant","tool"],"type":"string"},"content":{"type":"string","maxLength":32000}}},"maxItems":32,"description":"OpenAI-style chat messages."},"max_tokens":{"type":"integer","maximum":2048,"minimum":1},"temperature":{"type":"number","maximum":2,"minimum":0}}},"responseSchema":{"type":"json","example":{"id":"chatcmpl-xxx","usage":{"total_tokens":16,"prompt_tokens":12,"completion_tokens":4},"object":"chat.completion","choices":[{"index":0,"message":{"role":"assistant","content":"Hello!"},"finish_reason":"stop"}]}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.013259","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":"$0.013259/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.013259","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.013259","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_BvHSoLnd_odwDCHMvT0vv","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.013259","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Generate chat completions using the DeepSeek-V4.1-Flash model via Telnyx, paid per-request in USDC through the x402 protocol.","exampleAgentPrompt":"Using the Telnyx DeepSeek-V4.1-Flash endpoint, send this conversation — system: 'You are a helpful assistant', user: 'Summarize the key benefits of solar energy in 3 bullet points' — with a max of 512 tokens and temperature 0.7, and pay the per-request USDC fee automatically.","exampleUseCases":[{"title":"On-demand AI coding assistant","prompt":"Ask the Telnyx DeepSeek-V4.1-Flash model to review this Python function and suggest improvements: 'def add(a,b): return a+b' — use temperature 0.3 and cap the response at 300 tokens, paying per call."},{"title":"Automated customer FAQ responder","prompt":"Send the user's question 'What is your return policy?' to the DeepSeek-V4.1-Flash model via Telnyx with the system message 'You are a helpful e-commerce support agent', max 200 tokens, temperature 0.5, and bill the USDC fee per request."},{"title":"Tool-augmented agent reasoning step","prompt":"Run a DeepSeek-V4.1-Flash inference through Telnyx with these messages and the following tool definitions for a weather lookup — system: 'You are an agent', user: 'What's the weather in Paris?' — temperature 1.0, up to 1024 tokens, paying per call in USDC."}],"resultDescription":"Returns an OpenAI-compatible JSON chat completion object containing the assistant's reply message, finish reason (e.g. 'stop'), prompt/completion/total token counts, a unique completion ID, and the object type 'chat.completion'.","failureModes":["Payment failure — insufficient USDC balance or x402 payment rejected, returns 402 Payment Required","Invalid model identifier — model field must be exactly 'deepseek-ai/DeepSeek-V4.1-Flash', otherwise 400","Message array exceeds 32 items or content exceeds 32,000 characters, returns 400 validation error","More than 16 tools provided, returns 400","max_tokens out of range (must be 1–2048), returns 400","Temperature out of range (must be 0–2), returns 400","Telnyx inference backend unavailable, returns 503"],"whenToPreferThis":"Choose this endpoint when you need per-request, pay-as-you-go access to the DeepSeek-V4.1-Flash model without committing to a subscription, especially when paying programmatically in USDC via the x402 protocol. It is ideal for agents that need autonomous micropayment-based inference, OpenAI-compatible chat completions with optional tool calling, or bursty workloads where pre-purchasing API credits is impractical.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-12T06:44:06.256Z","isFirstParty":false,"canonicalSlug":"telnyx-x402-gateway-deepseek-v4-1-flash-chat-completions-0d11fad4"}