{"uid":"cap_uPIuywixL4bsW3kd7IpMM","slug":"eu-power-dispatch-api-paid-sample-negprice-decision-b8fb6b63","name":"EU Power Dispatch API – Paid Sample (NegPrice Decision)","description":"Cheapest end-to-end x402 purchase test. Always returns a 402 challenge without payment and the current full NegPrice decision after a valid USDC payment.","url":"https://energy.halowerk.com/demo/paid-sample","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET","HEAD","DELETE"],"type":"string"},"queryParams":{"type":"object","properties":{},"additionalProperties":false}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.001","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.001/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_jA1d1vh4Q-DfnRQcXp7OK","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.001","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns the current full negative-price decision for EU power markets after a micro-payment; issues a 402 challenge without payment.","exampleAgentPrompt":"What is the current negative-price decision for the EU power market right now? Go ahead and pay the small fee to retrieve the full NegPrice signal.","exampleUseCases":[{"title":"Flexible load scheduling decision","prompt":"Should I run my compute workload right now based on current EU electricity prices? Check the live NegPrice decision and tell me if prices are negative."},{"title":"x402 micropayment integration test","prompt":"Test the x402 payment flow against the EU Power Dispatch paid sample endpoint — confirm you get the 402 challenge without payment, then pay and show me the NegPrice decision you get back."},{"title":"Battery dispatch trigger","prompt":"Is there a negative price event happening on the German grid right now? Fetch the current NegPrice decision so I can decide whether to charge my battery storage."}],"resultDescription":"After a valid USDC micropayment via x402, the endpoint returns the current full NegPrice decision — a signal indicating whether EU/German spot electricity prices are negative — along with supporting spot-market context sourced from ENTSO-E and SMARD. Without payment, it returns a standard HTTP 402 challenge.","failureModes":["402 returned without payment — expected behavior, not a true error","Payment validation failure — if USDC amount or x402 header is malformed, payment is rejected","Stale or unavailable market data — upstream ENTSO-E/SMARD feed may be delayed","Network timeout — endpoint unreachable transiently","Invalid HTTP method — only GET/HEAD/DELETE accepted"],"whenToPreferThis":"Choose this endpoint when you need the current German/EU negative-price decision in real time and are operating within an x402-capable agent framework that can handle USDC micropayments automatically. It is ideal for flexible-load agents, battery dispatch systems, or developers testing x402 payment flows against a live, low-cost target.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T06:44:37.235Z","isFirstParty":false}