{"id":"98637395-5643-4da8-ba7d-e3af394283b3","shortId":"eH26je","kind":"mpp","title":"Perplexity text embeddings via pay-per-call MPP on Tempo L2","tagline":"Perplexity text embeddings via pay-per-call MPP on Tempo L2","description":"This endpoint provides access to Perplexity's embedding models through the Locus MPP (Micropayment Protocol) gateway. It accepts text input and returns vector embeddings using Perplexity's proprietary embedding models: `pplx-embed-v1-0.6b` (a smaller, faster model) and `pplx-embed-v1-4b` (a larger, higher-quality model). Payment is settled per-call on Tempo L2 using pathUSD at approximately $0.001 per request.\n\nThe endpoint is part of a broader Perplexity service suite hosted on the same MPP gateway that also exposes Sonar chat (with web grounding), web search, and contextualized embeddings. The embeddings endpoint itself accepts a POST with a JSON body containing the model identifier and the input text (a single string or an array of strings). The OpenAPI spec lists the path as `/perplexity/embed`.\n\nNote that the probe did not receive a 402 challenge when hitting this specific endpoint with HEAD/GET — it returned 404 instead. This is expected behavior for a POST-only endpoint on the Locus MPP gateway; the 404 on non-POST methods does not indicate the endpoint is down. The OpenAPI schema published by the gateway documents the endpoint as live with a 402 payment flow on POST. Documentation is available at the Perplexity API reference and the Locus skill file.","tags":["search","ai-search","web-grounding","sonar"],"capabilities":["text-embeddings","perplexity-embed-v1-0.6b","perplexity-embed-v1-4b","pay-per-call","mpp-tempo-settlement","batch-input"],"categories":["llm","embeddings"],"synonyms":["perplexity embeddings","text embedding api","vector embeddings","pplx-embed","semantic embeddings","perplexity vector api","locus mpp embeddings"],"warnings":["Probe returned 404 on HEAD and GET — endpoint is POST-only; liveness via POST not confirmed in probe","No example response schema or sample output available","Approximate pricing (~$0.001) is stated in OpenAPI x-payment-info description but no exact amount or decimals were captured in a 402 challenge","Currency address 0x20c000000000000000000000b9537d11c60e8b50 is listed but not independently verified as pathUSD"],"endpointUrl":"https://perplexity.mpp.paywithlocus.com/perplexity/embed","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":"0.520","qualityRationale":"The OpenAPI schema provides clear request structure, model options, and approximate pricing (~$0.001 per call). However, the probe did not capture a live 402 challenge on this specific endpoint (POST-only route returns 404 on HEAD/GET), no example response is available, and crawled pages all returned generic 404 JSON. Documentation links exist but were not 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