{"id":"933d90f6-0b39-44d2-8919-b1da463a32a2","shortId":"phQtCJ","kind":"mpp","title":"MPP-proxied OpenAI Chat Completions (GPT-4o, GPT-4, o1) settled via Tempo L2.","tagline":"MPP-proxied OpenAI Chat Completions (GPT-4o, GPT-4, o1) settled via Tempo L2.","description":"This endpoint wraps OpenAI's Chat Completions API behind the Micropayment Protocol (MPP), allowing AI agents to pay per-call using pathUSD on Tempo L2. The listed models include GPT-4o, GPT-4, o1, and others from the OpenAI family, with pricing that varies by model.\n\nThe endpoint is hosted at openai.mpp.tempo.xyz/v1/chat/completions and is designed to accept POST requests following the standard OpenAI chat completions request format. Callers send a JSON body containing a model identifier and a messages array; the MPP proxy handles payment negotiation via the 402 challenge/response flow before forwarding the request to OpenAI.\n\nImportant caveat: during probing, the endpoint returned 404 on both HEAD and GET requests, and no 402 MPP challenge was captured. The endpoint likely only responds to POST requests with the correct Content-Type header, which is consistent with the OpenAI API's design. However, without a captured 402 challenge, pricing details, supported models, and settlement parameters cannot be independently verified. All information below is inferred from the Bazaar listing metadata and the known MPP/Tempo conventions.","tags":["llm","gpt-4o","dall-e","whisper","tts","embeddings","chat"],"capabilities":["openai-chat-completions","gpt-4o","gpt-4","o1-model","mpp-payment","tempo-l2-settlement","per-call-billing","llm-proxy"],"categories":["llm"],"synonyms":["openai proxy","gpt-4o api","gpt-4 chat","o1 completions","micropayment openai","tempo openai","pay-per-call llm","chat completions api"],"warnings":["No 402 MPP challenge was captured — endpoint liveness for POST requests is unverified","All crawled pages (root, /docs, /api, /pricing, /README) returned 404","Pricing details are unknown — the listing says 'price varies by model' but no amounts were captured","No OpenAPI schema or documentation available","Request/response examples are inferred from standard OpenAI API format, not verified against this proxy"],"endpointUrl":"https://openai.mpp.tempo.xyz/v1/chat/completions","protocol":"mpp","transport":"http","auth":{"type":"mpp","details":{"realm":"mpp.tempo.xyz","intent":"session","method":"tempo","service_methods":{"tempo":{"assets":["0x20c000000000000000000000b9537d11c60e8b50"],"intents":["charge","session"]}}}},"qualityScore":"0.300","qualityRationale":"The endpoint returned 404 on HEAD and GET probes, and no 402 MPP challenge was captured. All crawled pages returned 'Not Found'. No OpenAPI schema, pricing details, or documentation are available. The listing is based entirely on the Bazaar metadata (title and description). The endpoint may be live for POST requests only, but this cannot be confirmed from the probe 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