{"uid":"cap_Ffjwwu0PtBL1Y2KCPtMqm","slug":"usb-configuration-alternate-interface-endpoint-topology-decoder-0141f776","name":"USB Configuration Alternate Interface Endpoint Topology Decoder","description":"Decode complete USB configuration/interface/endpoint descriptors and resolve one selected alternate per interface, endpoint counts and active endpoint collisions; no device access.","url":"https://detect.halowerk.com/v1/F-TD2000-DATASTRUCTURES-01/usb2-configuration-alternate-interface-endpoint-topology?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"artifact":{"type":"object","required":["usbConfig"],"properties":{"usbConfig":{"type":"object","required":["data","claim"],"properties":{"data":{"type":"object","required":["configuration_base64","selected_alternates"],"properties":{"selected_alternates":{"type":"array","items":{"type":"object","required":["interface","alternate"],"properties":{"alternate":{"type":"integer","maximum":255,"minimum":0},"interface":{"type":"integer","maximum":255,"minimum":0}},"additionalProperties":false},"maxItems":64,"minItems":0},"configuration_base64":{"type":"string","maxLength":16000,"minLength":0}},"additionalProperties":false},"claim":{"anyOf":[{"type":"null"},{"type":"object","required":["active","alternates","configuration_value","conflicts","interfaces"],"properties":{"active":{"type":"array","items":{"type":"object","required":["alternate","endpoints","interface"],"properties":{"alternate":{"type":"number","maximum":1000000000000000,"minimum":-1000000000000000},"endpoints":{"type":"array","items":{"type":"object","required":["additional_transactions","address","direction","interval","max_packet_bytes","number","transfer_type"],"properties":{"number":{"type":"number","maximum":1000000000000000,"minimum":-1000000000000000},"address":{"type":"number","maximum":1000000000000000,"minimum":-1000000000000000},"interval":{"type":"number","maximum":1000000000000000,"minimum":-1000000000000000},"direction":{"type":"string","maxLength":20000,"minLength":0},"transfer_type":{"type":"number","maximum":1000000000000000,"minimum":-1000000000000000},"max_packet_bytes":{"type":"number","maximum":1000000000000000,"minimum":-1000000000000000},"additional_transactions":{"type":"number","maximum":1000000000000000,"minimum":-1000000000000000}},"additionalProperties":false},"maxItems":4096},"interface":{"type":"number","maximum":1000000000000000,"minimum":-1000000000000000}},"additionalProperties":false},"maxItems":4096},"conflicts":{"type":"array","items":{"type":"object","required":["address","first_interface","second_interface"],"properties":{"address":{"type":"number","maximum":1000000000000000,"minimum":-1000000000000000},"first_interface":{"type":"number","maximum":1000000000000000,"minimum":-1000000000000000},"second_interface":{"type":"number","maximum":1000000000000000,"minimum":-1000000000000000}},"additionalProperties":false},"maxItems":4096},"alternates":{"type":"number","maximum":1000000000000000,"minimum":-1000000000000000},"interfaces":{"type":"number","maximum":1000000000000000,"minimum":-1000000000000000},"configuration_value":{"type":"number","maximum":1000000000000000,"minimum":-1000000000000000}},"additionalProperties":false}]}},"additionalProperties":false}},"additionalProperties":false}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.003","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":"$0.003/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.003","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.003","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_USOS49ZH7uo4Ig7fIe3A3","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.003","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Decodes USB configuration/interface/endpoint descriptors from base64, resolves selected alternates per interface, and identifies endpoint collisions — without requiring physical device access.","exampleAgentPrompt":"Parse this base64-encoded USB configuration descriptor and resolve interface 0 to alternate 1, interface 1 to alternate 0 — tell me the active endpoint topology and flag any endpoint address collisions.","exampleUseCases":[{"title":"Driver development endpoint validation","prompt":"I have a USB descriptor blob from our new HID device encoded in base64. Can you decode it, select alternate 0 for all interfaces, and tell me what endpoints are active and whether any endpoint addresses conflict?"},{"title":"Firmware QA collision detection","prompt":"Our firmware team just exported a USB configuration descriptor — here it is in base64. We're using alternate 1 on interface 2 and alternate 0 on interfaces 0 and 1. Check the full topology and flag any endpoint collisions before we ship."},{"title":"USB spec compliance verification","prompt":"I need to verify a USB configuration descriptor for a composite audio device without plugging it in. Here's the base64 descriptor — resolve interface 0 to alternate 2 and interface 1 to alternate 0, and give me all the endpoint details including transfer types and max packet sizes."}],"resultDescription":"Returns the fully decoded USB configuration topology: for each active interface (resolved to the selected alternate), a list of endpoints with address, direction, transfer type, max packet bytes, interval, and additional transactions. Also returns a conflicts list identifying any endpoint address collisions across active interfaces, plus summary counts.","failureModes":["Malformed or truncated base64 input returns a parse error","Selected alternate index out of range for a given interface returns a validation error","Descriptor violates USB spec structure (e.g. wrong bLength) causes decode failure","Empty configuration_base64 with no claim returns empty topology","Conflicting or duplicate interface/alternate entries in selected_alternates may cause undefined resolution"],"whenToPreferThis":"Use this endpoint when you need to statically analyze a USB configuration descriptor — resolving interface alternate settings and detecting endpoint collisions — without access to a physical device or OS USB stack. It is ideal for firmware development, driver QA, USB spec compliance checking, and offline descriptor auditing. Prefer it over raw binary parsers when you need structured topology output with collision detection in a single API call.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-11-04T06:40:04.060Z","isFirstParty":false,"canonicalSlug":"usb-configuration-alternate-interface-endpoint-topology-decoder-0141f776"}