{"openapi":"3.1.0","info":{"title":"IMPERIUM Pulse","version":"1.0.0","x-guidance":"Every path is payable per request over HTTP 402 in USDG on eip155:4663. GET or POST without credentials to receive the challenge (WWW-Authenticate Payment header, plus the x402 payment-required header). Sign PermitWitnessTransferFrom for the advertised offer (spender is the canonical x402ExactPermit2Proxy) and retry with the payment-signature header. Buyers only need USDG: a one-time sponsored Permit2 approval is available at POST /api/gas/sponsor {\"address\"}."},"x-service-info":{"description":"IMPERIUM Pulse market intelligence for tokenized stocks on Robinhood Chain: momentum, sentiment, risk, regime, fundamentals, and anomaly signals from 0.05 USDG per call. The signals are x402-native and settle through the MeshGateway facilitator: POST a signal path here (or directly at api.imperium-fi.com) with {\"symbol\":\"AAPL\"}, answer the 402 challenge with the same USDG permit2 flow this marketplace uses, and payment goes straight to IMPERIUM."},"paths":{"/anomaly":{"post":{"summary":"Unusual behavior, activity spikes, and shifting conditions, surfaced early. 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POST {\"symbol\":\"AAPL\"}; charged by IMPERIUM over x402 v2 (USDG, permit2, Robinhood Chain).","requestBody":{"required":false,"content":{"application/json":{"schema":{"type":"object","additionalProperties":true,"description":"Forwarded to the upstream API verbatim"}}}},"responses":{"200":{"description":"Successful response"},"402":{"description":"Payment Required"}},"x-payment-info":{"price":{"mode":"fixed","currency":"USD","amount":"0.100000"},"protocols":[{"mpp":{"method":"evm","intent":"charge","currency":"0x5fc5360D0400a0Fd4f2af552ADD042D716F1d168"}},{"x402":{}}],"amount":"100000","currency":"0x5fc5360D0400a0Fd4f2af552ADD042D716F1d168","description":"IMPERIUM Pulse: Fundamentals","intent":"charge","method":"evm","recipient":"0xc550FD80818BCd045a8e9BbD07aeEFfa6176E13d","scheme":"exact","network":"eip155:4663","extra":{"assetTransferMethod":"permit2","spender":"0x402085c248EeA27D92E8b30b2C58ed07f9E20001","name":"USDG"}}}},"/momentum":{"post":{"summary":"Directional momentum for a tokenized asset: bias, strength, confidence, and time horizon. 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Free to browse the shape; each entry is also listed below and payable through this storefront or directly at https://api.imperium-fi.com/v1/{path}.","responses":{"200":{"description":"Successful response"},"402":{"description":"Payment Required"}},"x-payment-info":{"price":{"mode":"fixed","currency":"USD","amount":"0.005000"},"protocols":[{"mpp":{"method":"evm","intent":"charge","currency":"0x5fc5360D0400a0Fd4f2af552ADD042D716F1d168"}},{"x402":{}}],"amount":"5000","currency":"0x5fc5360D0400a0Fd4f2af552ADD042D716F1d168","description":"IMPERIUM Pulse: Signal catalog","intent":"charge","method":"evm","recipient":"0xc550FD80818BCd045a8e9BbD07aeEFfa6176E13d","scheme":"exact","network":"eip155:4663","extra":{"assetTransferMethod":"permit2","spender":"0x402085c248EeA27D92E8b30b2C58ed07f9E20001","name":"USDG"}}}},"/risk":{"post":{"summary":"Structured risk analysis for an asset or portfolio. 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