{"id":"5fc74d73-9fcb-4329-8d5d-915c5711c68f","shortId":"8eWASM","kind":"mpp","title":"MPP-proxied OpenAI Responses API (GPT-4o, Codex, etc.) settled via Tempo L2","tagline":"MPP-proxied OpenAI Responses API (GPT-4o, Codex, etc.) settled via Tempo L2","description":"This endpoint proxies the OpenAI Responses API through the Tempo MPP (Micropayment Protocol) gateway at openai.mpp.tempo.xyz. The Responses API is OpenAI's newer unified interface that supports models like GPT-4o, Codex, and others, returning structured responses. Payments are expected to settle on Tempo L2 using pathUSD.\n\nThe endpoint is located at /v1/responses, which mirrors the OpenAI Responses API path. Because the OpenAI Responses API uses POST requests, the probe's HEAD/GET attempts returned 404 rather than the expected 402 MPP challenge. This is consistent with a method-restricted endpoint rather than a dead service, though without a successful POST probe the liveness cannot be fully confirmed.\n\nDocumentation, pricing details, and schema information are not available from the proxy itself — all crawled paths (root, /docs, /api, /pricing, /README) returned 404. The listing description states \"price varies by model,\" suggesting per-call charges that differ depending on which OpenAI model is invoked. Without a captured 402 challenge or OpenAPI spec, exact pricing and supported parameters remain unknown.","tags":["llm","gpt-4o","dall-e","whisper","tts","embeddings","chat"],"capabilities":["openai-responses-api","gpt-4o","codex","llm-inference","mpp-payment","tempo-l2-settlement","pay-per-call"],"categories":["llm"],"synonyms":["OpenAI proxy","GPT-4o API","Codex API","OpenAI Responses","micropayment LLM","Tempo OpenAI","pay-per-request GPT"],"warnings":["Endpoint returned 404 on HEAD and GET probes; likely POST-only but liveness is unconfirmed","No MPP 402 challenge captured — payment terms (amount, currency, intent) are unknown","All documentation and pricing URLs returned 404","Exact supported models and per-model pricing are not documented at the proxy","Example request/response are inferred from OpenAI's public Responses API format, not from this proxy's actual schema"],"endpointUrl":"https://openai.mpp.tempo.xyz/v1/responses","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":"0.200","qualityRationale":"No 402 challenge was captured (HEAD/GET returned 404, likely because the endpoint only accepts POST). All crawled documentation paths returned 404. No schema, no pricing details, and no confirmed liveness. The listing is effectively a stub based on the Bazaar description and URL structure 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