{"service":"NexusEval Marketing Preflight","protocol":"x402-v2","network":"eip155:8453","currency":"USDC","buyingRule":"Use only for a real matching task with owner-authorized spend and expected utility at least the price; choose the smallest matching route.","recommendedFirstMachineTest":{"id":"quick-gate","name":"Quick Marketing Gate","method":"POST","path":"/api/gate","endpoint":"https://nexuseval.vercel.app/api/gate","priceUsd":0.01,"intent":"Fast PASS/WARN/BLOCK pre-publish or pre-send decision"},"humanProductionPilot":"https://nexuseval-demand-mesh.vercel.app/pilot","routes":[{"id":"quick-gate","name":"Quick Marketing Gate","method":"POST","path":"/api/gate","endpoint":"https://nexuseval.vercel.app/api/gate","priceUsd":0.01,"intent":"Fast PASS/WARN/BLOCK pre-publish or pre-send decision","example":{"objective":"lead generation","audience":"B2B SaaS marketing leaders","headline":"Improve campaign conversion before launch","copy":"Evaluate this marketing message for clarity, proof and CTA quality.","cta":"Book demo"}},{"id":"single-qa","name":"Full Marketing Evaluation","method":"POST","path":"/api/evaluate","endpoint":"https://nexuseval.vercel.app/api/evaluate","priceUsd":0.04,"intent":"Evaluate one general marketing asset or message","example":{"objective":"lead generation","audience":"B2B SaaS marketing leaders","headline":"Improve campaign conversion before launch","copy":"Evaluate this marketing message for clarity, proof and CTA quality.","cta":"Book demo"}},{"id":"ad-qa","name":"Advertising Copy QA","method":"POST","path":"/api/evaluate/ad","endpoint":"https://nexuseval.vercel.app/api/evaluate/ad","priceUsd":0.04,"intent":"Evaluate one advertising asset","example":{"objective":"lead generation","audience":"B2B SaaS marketing leaders","headline":"Improve campaign conversion before launch","copy":"Evaluate this marketing message for clarity, proof and CTA quality.","cta":"Book demo"}},{"id":"landing-qa","name":"Landing Page Conversion QA","method":"POST","path":"/api/evaluate/landing","endpoint":"https://nexuseval.vercel.app/api/evaluate/landing","priceUsd":0.04,"intent":"Evaluate landing-page messaging and CTA quality","example":{"objective":"lead generation","audience":"B2B SaaS marketing leaders","headline":"Improve campaign conversion before launch","copy":"Evaluate this marketing message for clarity, proof and CTA quality.","cta":"Book demo"}},{"id":"email-qa","name":"Marketing Email QA","method":"POST","path":"/api/evaluate/email","endpoint":"https://nexuseval.vercel.app/api/evaluate/email","priceUsd":0.04,"intent":"Evaluate one marketing or lifecycle email before send","example":{"objective":"lead generation","audience":"B2B SaaS marketing leaders","headline":"Improve campaign conversion before launch","copy":"Evaluate this marketing message for clarity, proof and CTA quality.","cta":"Book demo"}},{"id":"gtm-qa","name":"GTM Brief and Positioning QA","method":"POST","path":"/api/evaluate/gtm","endpoint":"https://nexuseval.vercel.app/api/evaluate/gtm","priceUsd":0.04,"intent":"Evaluate one GTM positioning or messaging asset","example":{"objective":"lead generation","audience":"B2B SaaS marketing leaders","headline":"Improve campaign conversion before launch","copy":"Evaluate this marketing message for clarity, proof and CTA quality.","cta":"Book demo"}},{"id":"batch-qa","name":"Batch Marketing QA","method":"POST","path":"/api/evaluate/batch","endpoint":"https://nexuseval.vercel.app/api/evaluate/batch","priceUsd":0.49,"intent":"Evaluate up to 20 marketing assets together","example":{"items":[{"objective":"lead generation","audience":"B2B SaaS marketing leaders","headline":"Improve campaign conversion before launch","copy":"Evaluate this campaign message for clarity, proof and CTA quality.","cta":"Book demo"}]}},{"id":"launch-readiness","name":"Launch Readiness QA Pack","method":"POST","path":"/api/evaluate/launch","endpoint":"https://nexuseval.vercel.app/api/evaluate/launch","priceUsd":2.99,"intent":"GO/REVIEW/NO-GO launch-readiness check","example":{"items":[{"objective":"lead generation","audience":"B2B SaaS marketing leaders","headline":"Improve campaign conversion before launch","copy":"Evaluate this campaign message for clarity, proof and CTA quality.","cta":"Book demo"}]}},{"id":"campaign-audit","name":"Campaign Portfolio Audit","method":"POST","path":"/api/evaluate/campaign","endpoint":"https://nexuseval.vercel.app/api/evaluate/campaign","priceUsd":9.99,"intent":"Portfolio-level audit for up to 50 campaign assets","example":{"items":[{"objective":"lead generation","audience":"B2B SaaS marketing leaders","headline":"Improve campaign conversion before launch","copy":"Evaluate this campaign message for clarity, proof and CTA quality.","cta":"Book demo"}]}}],"flow":["POST the documented request to the selected endpoint.","Receive HTTP 402 with the live payment requirements.","Verify amount, network, recipient, resource, owner spending policy and task utility.","Settle through the buyer's authorized x402 wallet flow.","Retry the same request with the payment signature.","Consume the structured result and preserve settlement/delivery evidence."],"retrySafety":"After an ambiguous paid request, check settlement/receipt evidence before retrying to avoid duplicate spend.","liveMarketplaceState":{"reachable":true,"indexed":true,"originResponded":true,"health":1,"sellerRoutable":true,"toolCount":32,"pricedToolCount":4,"allRoutesPriced":false,"pricedRoutes":[{"route":"/api/gate","price":0.01,"networks":["eip155:8453"]},{"route":"/api/v1/chat/completions","price":0.01,"networks":["eip155:8453"]},{"route":"/api/v1/messages","price":0.01,"networks":["eip155:8453"]},{"route":"/api/v1/responses","price":0.01,"networks":["eip155:8453"]}],"note":"Agent402 listing/routability is discovery evidence, not proof that its router has paid. External execution can still depend on router policy and settled-history requirements."},"proof":"https://nexuseval-demand-mesh.vercel.app/proof.json"}