{"uid":"cap_np3192RGRAC9urCQaOoUA","slug":"nova-retail-context-delta-dffe75a1","name":"Nova Retail Context Delta","description":"Nova retail context_delta context resource","url":"https://nova-retail-controlled-proof.onrender.com/retail/v1/context/context-delta?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":null,"responseSchema":{"type":"json","example":{"subject":{"label":"BTC/USD","subject_id":"BTC-USD","subject_type":"market_pair"},"limitations":[],"resource_id":"context-delta-91e9a7267ab3fcdce8fe8f66","delta_status":"changed","generated_at":"2026-09-12T12:00:00Z","resource_type":"context_delta","schema_version":"0.1.0","authority_effect":"none","material_changes":[{"field":"observed_at","item_id":null,"category":"freshness","change_id":"material-change-aad59f135d32b8e6cfb9f8e3","change_type":"value_changed","current_value":"2026-09-12T12:00:00Z","previous_value":"2026-09-12T11:55:00Z"},{"field":"observed_at","item_id":"public-example-source","category":"provenance","change_id":"material-change-ee1ca54c09fa66775144e3a4","change_type":"value_changed","current_value":"2026-09-12T12:00:00Z","previous_value":"2026-09-12T11:55:00Z"},{"field":"content","item_id":"public-example-last-price","category":"evidence","change_id":"material-change-f712bc18f08980ebc25df088","change_type":"content_changed","current_value":"{\"claim_or_observation\":\"last_price=100100 BTC-USD\",\"evidence_id\":\"public-example-last-price\",\"source_id\":\"public-example-source\"}","previous_value":"{\"claim_or_observation\":\"last_price=100000 BTC-USD\",\"evidence_id\":\"public-example-last-price\",\"source_id\":\"public-example-source\"}"}],"freshness_changes":[{"field":"observed_at","change_id":"freshness-change-ebecda1fcbfb3c08e114de17","current_value":"2026-09-12T12:00:00Z","previous_value":"2026-09-12T11:55:00Z"}],"confidence_changes":[],"current_context_id":"state-ping-example-current","limitation_changes":[],"provenance_changes":[{"field":"observed_at","change_id":"provenance-change-c14455d3e5b633ef90196215","source_id":"public-example-source","change_type":"observed_at_changed","current_value":"2026-09-12T12:00:00Z","previous_value":"2026-09-12T11:55:00Z"}],"previous_context_id":"state-ping-example-previous","contradiction_changes":[],"evidence_state_changes":[{"change_id":"evidence-change-d18b1a54a0b68c6855212169","source_id":"public-example-source","change_type":"content_changed","evidence_id":"public-example-last-price","current_status":"observed","previous_status":"observed"}],"unresolved_evidence_changes":[]}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.02","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"registry","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":"$0.02/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.02","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.02","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_ZPm9chBEtuutOQ3f4UoZi","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.02","costPer":"request","priority":0,"asset":null,"unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Submits a context delta update for a retail session, capturing incremental state changes in a retail context resource","exampleAgentPrompt":"Push a context delta update to the Nova retail context service for our current retail session — the cart quantity changed from 2 to 5 and the selected SKU is 'SHOE-RED-42'.","exampleUseCases":[{"title":"Cart state change tracking","prompt":"Record a context delta for the retail session showing that the customer just added item SKU 'JACKET-BLU-M' to their cart and the total item count went from 1 to 3."},{"title":"Product selection context update","prompt":"Send a delta update to the Nova retail context resource indicating the user switched their selected product from 'BOOT-BRN-10' to 'BOOT-BRN-11' during this retail session."},{"title":"Checkout step progression sync","prompt":"Submit a retail context delta showing the session moved from the 'browsing' step to the 'checkout' step after the customer clicked buy for order session ID 'sess-20240812-retail'."}],"resultDescription":"Returns an acknowledgment confirming the context delta was received and applied, along with the updated context state or a confirmation identifier for the delta event.","failureModes":["Invalid or missing context delta payload returns a 400 error","Session or context identifier not found returns a 404","Payment not included or invalid x402 payment header returns a 402","Malformed delta structure results in rejection","Service unavailable on Render cold start returns a 503"],"whenToPreferThis":"Choose this endpoint when you need to submit incremental, differential state changes to a retail context resource rather than replacing the full state. It is suited for event-driven retail workflows where only changed fields need to be pushed, keeping payloads small and efficient.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-11T18:36:13.196Z","isFirstParty":false,"canonicalSlug":"nova-retail-context-delta-dffe75a1"}