{"uid":"cap_Y4AmOLqS1mqBwFipG_ipL","slug":"mac-address-vendor-lookup-ieee-oui-registry-2f5f6c74","name":"MAC Address Vendor Lookup (IEEE OUI Registry)","description":"Pay-per-call company registry, government, legal and B2B data tools for AI agents, from official registers and public sources. Payment: x402, USDC on Base, Solana, Arc, Polygon, Arbitrum, Monad, World Chain, Optimism, Avalanche, Celo or Stellar, or RLUSD/XRP on the XRP Ledger. No signup, no API key; a failed call is not charged.","url":"https://api.companyrecords-api.workers.dev/api/b2b/macvendors-lookup?utm_source=zero.xyz","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"],"type":"string"},"queryParams":{"type":"object","required":["mac"],"properties":{"mac":{"type":"string","description":"MAC address or OUI, e.g. 44:38:39:ff:ef:57 or 443839"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":{"type":"json","example":{"mac":"44:38:39:ff:ef:57","oui":"44:38:39","source":"https://api.macvendors.com/","vendor":"Cumulus Networks, inc","checkedAt":"2026-10-23T09:37:36.959Z"}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.002","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":"$0.002/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.002","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.002","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_mmlTAf4GGlulUawcBNM1j","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.002","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns the registered hardware vendor name for a given MAC address or OUI prefix by querying the IEEE OUI registry via macvendors.com.","exampleAgentPrompt":"What company manufactured the device with MAC address 44:38:39:ff:ef:57? Look up the registered vendor from the IEEE OUI registry.","exampleUseCases":[{"title":"Identify rogue device on network","prompt":"I see an unknown device on my network with MAC address B8:27:EB:12:34:56 — can you look up who manufactured it so I know if it's suspicious?"},{"title":"Network asset inventory enrichment","prompt":"I have a list of MAC addresses from our office network scan; start with DC:A6:32:AA:BB:CC and tell me which hardware vendor is registered for that address."},{"title":"Cybersecurity forensics investigation","prompt":"During a packet capture analysis I found traffic from 00:50:56:AB:12:34 — what vendor made that NIC so I can narrow down what kind of device it is?"}],"resultDescription":"A JSON object containing the full MAC address queried, the OUI prefix (first three octets), the registered vendor name (e.g. 'Cumulus Networks, inc'), the source URL (macvendors.com API), and a checkedAt timestamp indicating when the lookup was performed.","failureModes":["Unknown or unregistered OUI returns an error or empty vendor field if the MAC prefix is not in the IEEE registry","Malformed MAC address input (wrong format, wrong length) may return a 400-level error","Rate limiting or upstream macvendors.com availability issues could cause failures","Private/locally administered MAC addresses (second bit of first byte set) are not registered and will not resolve to a vendor"],"whenToPreferThis":"Use this endpoint when you need to quickly identify the hardware manufacturer of a device given its MAC address or OUI prefix, especially for network inventory, security auditing, or device identification tasks. It is ideal when you want a simple vendor name lookup without needing full device profile data. Prefer this over manual IEEE registry lookups or building your own OUI database.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-24T12:33:35.059Z","isFirstParty":false,"canonicalSlug":"mac-address-vendor-lookup-ieee-oui-registry-2f5f6c74"}