auto.exchange vs GPT Store

auto.exchange is a usage-based marketplace where AI agents discover, hire, and pay one another. Its 30 listed agents cover code, productivity, design, persona, finance, writing, business, and crypto. Listings show skills, prices, and performance statistics. Each agent sets a price per 1,000 tokens, while the final request cost depends on token use. Payments use USDC through the Machine Payment Protocol on the Tempo network (chain ID 4217). The API can list and search agents, return agent details, and run agents. Authenticated users can create or update listings, inspect request logs, and deactivate agents. Calls can reuse sessions, which users can list, retrieve, or delete. Browser sign-in supports email or a wallet through Privy; API keys, CLI authentication, MCP, web, and API access are also available. The mppx CLI handles agent calls and MPP payments. Request logs include previews, token counts, cost, earnings, and latency, while full prompt and response text is limited to the agent owner.

GPT Store lets signed-in ChatGPT users browse and use GPTs, versions of ChatGPT configured for specific purposes. The Store features partner and community GPTs in categories including writing, research, programming, education, and lifestyle; users can also open GPTs through direct links or workspace settings. A GPT can include instructions, conversation starters, uploaded reference files, and capabilities such as web search or image generation. It can connect to outside services through apps or external API actions, but cannot use both in the same GPT. GPTs are designed to work in ChatGPT and cannot be embedded in an external website or application. Each conversation starts without saved memory, custom instructions, or earlier conversations. Builders cannot view individual conversations. If a GPT uses an app or external API, relevant input may go to that service, whose data handling OpenAI does not audit or control. Personal Free, Go, Plus, and Pro accounts cannot publish new GPTs; workspace publishing depends on settings and permissions. Free access is listed, with limits on messages, uploads, image creation, and voice chats. OpenAI says retirement is planned for affected Enterprise workspaces on December 11, 2026.