{"uid":"cap_ydp7_rERXIUyHz6Qfo3PO","slug":"x402factory-ai-x402factory-5-335d65d3","name":"x402factory GPT Wrapper (Solana x402 Payments)","description":"Solana GPT wrapper API using x402 payments. Default direct call: model gpt-5-mini, max_output_tokens=2000, fixed price 0.01 USDC for up to 1000 input tokens. For all other settings the price is computed per model as (input_tokens * input_price_per_million + max_output_tokens * output_price_per_million) / 1,000,000, with a minimum of 0.001 USDC and always rounded up to 6 decimals. Optional max_input_tokens lets you cap the input tokens used for pricing; if the message is longer than this cap the server returns an error instead of under-pricing. Optional action=message (or omitting action) performs a direct GPT call with the given message. Optional action=create creates a custom agent with the given message as preprompt for 0.001 USDC (no OpenAI call), stores a base_price_usdc using (max_input_tokens_for_agent or 1000) + preprompt + max_output_tokens, and returns a custom_id. Optional action=list lists up to 100 recent custom agents for the paying wallet for 0.001 USDC without calling OpenAI. Custom agents can be called via POST /solana/llm/gpt with custom_id, or POST /solana/llm/gpt/{custom_id}. Each custom agent has a fixed price per call based on its stored preprompt, model, max_output_tokens and max_input_tokens; if the runtime message is longer than max_input_tokens the server returns an error. Custom LLM agent AW5793DBAYAHSEHJTU on Solana. Model gpt-5-mini, max_input_tokens=5000, max_output_tokens=5300. Preprompt preview (first 150 chars): \"Here is a prompt i received from a client, we going to forward it to next step but i need to add some info, your task is to exactly reply like this: C\". Pricing mode: agent-per-token. Prepaid price (x402) for this request: 0.017925 USDC. Estimated input tokens for pricing: 5061.","url":"https://x402factory.ai/solana/llm/gpt/AW5793DBAYAHSEHJTU","method":"POST","headers":{},"bodySchema":null,"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.01","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":"$0.01/call","primary":{"kind":"unknown","protocol":"x402","network":"base","amountUsd":null,"per":"call","confidence":"unknown"},"accepted":[{"kind":"unknown","protocol":"x402","network":"base","amountUsd":null,"per":"call","confidence":"unknown"}]},"paymentMethods":[{"uid":"pm_qGGbMoAWOanRrI3SxEoDM","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0","costPer":"request","priority":0,"asset":"EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Calls OpenAI GPT models via a Solana x402-payment-gated API, with dynamic per-token pricing, agent creation, and agent listing capabilities.","exampleAgentPrompt":"Ask GPT-5-mini to write me a 3-paragraph summary of the future of decentralized finance, using up to 2000 output tokens and capping my input at 500 tokens — pay for it with my Solana wallet via x402.","exampleUseCases":null,"resultDescription":"Returns the GPT model's text completion response. For action=create, returns a custom_id for the new agent and stores base pricing. For action=list, returns up to 100 recent custom agents associated with the paying wallet, each with their configuration and pricing details.","failureModes":["Input tokens exceed max_input_tokens cap — server returns an error instead of under-pricing","x402 payment not received or insufficient USDC — payment rejected before request is processed","Invalid model name specified — API returns an error","Message too long with no max_input_tokens set — may cause unexpected pricing","custom_id not found when invoking a custom agent — returns not found error","OpenAI API downstream failure — returns 5xx error"],"whenToPreferThis":"Use this endpoint when you need to call GPT models and want to pay per-request in USDC via the Solana blockchain using the x402 payment protocol, without managing traditional OpenAI API keys. Especially useful for agents that need metered, on-chain-auditable LLM usage, or for creating and managing reusable custom GPT agents with preprompts paid in crypto.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-16T00:36:12.297Z","isFirstParty":false}