{"id":"2f7d9896-7164-431a-89c4-8f1f3280a21c","shortId":"mXB8PH","kind":"mpp","title":"Perplexity Sonar chat with real-time web grounding, pay-per-call via Locus MPP on Tempo L2.","tagline":"Perplexity Sonar chat with real-time web grounding, pay-per-call via Locus MPP on Tempo L2.","description":"This endpoint exposes Perplexity's Sonar chat models through the Locus MPP (Micropayment Protocol), settling payments in pathUSD on Tempo L2. The `/perplexity/chat` path accepts OpenAI-compatible chat-completion requests with support for multiple Sonar model variants: `sonar`, `sonar-pro`, `sonar-reasoning-pro`, and `sonar-deep-research`. Each request can include web-search options (context size, search type, user location), domain/recency/language filters, structured JSON output via `response_format`, image return, related-question generation, and configurable reasoning effort for the reasoning-pro model. Pricing is model-dependent, roughly $0.005–$0.02 per call.\n\nThe same Locus MPP gateway also hosts sibling endpoints for standalone web search (`/perplexity/search` at ~$0.006/call), standard embeddings (`/perplexity/embed` at ~$0.001/call using `pplx-embed-v1-0.6b` or `pplx-embed-v1-4b`), and contextualized embeddings (`/perplexity/context-embed` at ~$0.001/call). All endpoints use the `charge` intent, meaning each call is a one-shot payment.\n\nNote: The probe did not capture a live 402 challenge on HEAD/GET for the `/perplexity/chat` path (it returned 404), which is expected because this endpoint only accepts POST requests. The OpenAPI spec is well-defined with full request schemas, and the gateway's error messages point to valid documentation at `paywithlocus.com/skill.md` and `paywithlocus.com/llms.txt`.","tags":["search","ai-search","web-grounding","sonar"],"capabilities":["sonar-chat","sonar-pro","sonar-reasoning-pro","sonar-deep-research","web-grounded-llm","web-search","embeddings","contextualized-embeddings","structured-json-output","search-domain-filter","search-recency-filter","image-results","related-questions","mpp-tempo-settlement","pay-per-call"],"categories":["llm","search"],"synonyms":["perplexity sonar","perplexity api","web-grounded chat","ai search api","sonar pro","sonar reasoning","locus mpp perplexity","perplexity micropayment","real-time search llm"],"warnings":["Probe returned 404 on HEAD/GET; endpoint is POST-only so liveness via 402 challenge was not confirmed","Pricing amounts are listed as null in x-payment-info; only human-readable approximations are given in description fields","No response schema or example response is provided in the OpenAPI spec","Documentation links (paywithlocus.com/skill.md, paywithlocus.com/llms.txt) were not crawled to verify availability"],"endpointUrl":"https://perplexity.mpp.paywithlocus.com/perplexity/chat","protocol":"mpp","transport":"http","auth":{"type":"mpp","details":{"realm":"perplexity.mpp.paywithlocus.com","intent":"charge","method":"tempo","service_methods":{"tempo":{"assets":["0x20c000000000000000000000b9537d11c60e8b50"],"intents":["charge"]}}}},"qualityScore":"0.650","qualityRationale":"The OpenAPI spec is detailed with full request schemas, model options, and approximate pricing. However, the probe did not capture a live 402 challenge (POST was not attempted), no response schema or example response is documented, and crawled pages all returned 404 (expected for non-endpoint paths). Pricing is approximate and amount fields are null in the 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