macadress.com API

openapi: 3.1.0
info:
  title: macadress.com API
  version: "1.0"
  description: >
    MAC address / OUI vendor lookup. Every field on the lookup response
    beyond the original v1 set (see the x-added-in-version extension on
    each) is additive and nullable: existing integrations reading only the
    original fields are unaffected by new ones appearing alongside them.
  contact:
    url: https://macadress.com/docs
  license:
    name: See https://macadress.com/terms
externalDocs:
  description: Full documentation with request/response examples
  url: https://macadress.com/docs
servers:
  - url: https://api.macadress.com

security:
  - apiKeyHeader: []
  - apiKeyQuery: []

paths:
  /v1/mac/{mac}:
    get:
      operationId: lookupMAC
      summary: Look up a single MAC address
      parameters:
        - name: mac
          in: path
          required: true
          schema: { type: string }
          description: >
            Any common format: colon, dash, dot-grouped, space-separated, or
            bare hex (case-insensitive).
          example: "00:03:93:AB:12:34"
      responses:
        "200":
          description: Lookup result (present whether or not the address is registered)
          headers:
            X-Request-Id: { $ref: "#/components/headers/XRequestId" }
            X-Data-Version: { $ref: "#/components/headers/XDataVersion" }
            X-RateLimit-Limit: { $ref: "#/components/headers/XRateLimitLimit" }
            X-RateLimit-Remaining: { $ref: "#/components/headers/XRateLimitRemaining" }
            X-RateLimit-Reset: { $ref: "#/components/headers/XRateLimitReset" }
          content:
            application/json:
              schema: { $ref: "#/components/schemas/Result" }
        "400":
          description: Input did not parse as a MAC address
          content:
            application/json:
              schema: { $ref: "#/components/schemas/ParseErrorBody" }
        "401": { $ref: "#/components/responses/Unauthorized" }
        "429": { $ref: "#/components/responses/RateLimited" }

  /v1/mac/batch:
    post:
      operationId: lookupMACBatch
      summary: Look up up to 100 MAC addresses in one request
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              required: [macs]
              properties:
                macs:
                  type: array
                  maxItems: 100
                  items: { type: string }
                api_key:
                  type: string
                  description: Alternative to the Authorization header or ?api_key= query param.
      responses:
        "200":
          description: One result per input, in the same order, each with the same shape as GET /v1/mac/{mac}
          headers:
            X-Request-Id: { $ref: "#/components/headers/XRequestId" }
            X-Data-Version: { $ref: "#/components/headers/XDataVersion" }
            X-RateLimit-Limit: { $ref: "#/components/headers/XRateLimitLimit" }
            X-RateLimit-Remaining: { $ref: "#/components/headers/XRateLimitRemaining" }
            X-RateLimit-Reset: { $ref: "#/components/headers/XRateLimitReset" }
          content:
            application/json:
              schema:
                type: object
                properties:
                  count: { type: integer }
                  results:
                    type: array
                    items: { $ref: "#/components/schemas/BatchItem" }
        "400":
          description: Malformed request body, empty macs array, or more than 100 entries
          content:
            application/json:
              schema: { $ref: "#/components/schemas/ParseErrorBody" }
        "401": { $ref: "#/components/responses/Unauthorized" }
        "429": { $ref: "#/components/responses/RateLimited" }

  /v1/vendors:
    get:
      operationId: searchVendors
      summary: Search the registered vendor/block directory
      parameters:
        - name: query
          in: query
          schema: { type: string }
          description: Substring match against organization name, case-insensitive.
        - name: country
          in: query
          schema: { type: string }
          description: Exact ISO 3166-1 alpha-2 code, e.g. US, DE, JP.
        - name: limit
          in: query
          schema: { type: integer, default: 10, maximum: 50 }
          description: Max results to return.
      responses:
        "200":
          description: Matching non-private blocks. Counts as one call against the plan quota.
          headers:
            X-Request-Id: { $ref: "#/components/headers/XRequestId" }
            X-Data-Version: { $ref: "#/components/headers/XDataVersion" }
            X-RateLimit-Limit: { $ref: "#/components/headers/XRateLimitLimit" }
            X-RateLimit-Remaining: { $ref: "#/components/headers/XRateLimitRemaining" }
            X-RateLimit-Reset: { $ref: "#/components/headers/XRateLimitReset" }
          content:
            application/json:
              schema: { $ref: "#/components/schemas/VendorSearchResult" }
        "401": { $ref: "#/components/responses/Unauthorized" }
        "429": { $ref: "#/components/responses/RateLimited" }

  /v1/healthz:
    get:
      operationId: healthz
      summary: Liveness check (not counted against any quota, no API key required)
      security: []
      responses:
        "200":
          description: Database reachable
          content:
            application/json:
              schema:
                type: object
                properties: { status: { type: string, enum: [ok] } }
        "503":
          description: Database unreachable
          content:
            application/json:
              schema:
                type: object
                properties: { error: { type: string } }

components:
  securitySchemes:
    apiKeyHeader:
      type: http
      scheme: bearer
      description: 'Authorization: Bearer mk_...'
    apiKeyQuery:
      type: apiKey
      in: query
      name: api_key

  headers:
    XRequestId:
      description: Per-request identifier, present on every response including errors.
      schema: { type: string }
    XDataVersion:
      description: Date (UTC) the underlying vendor database last synced successfully. Same value as meta.database_version.
      schema: { type: string, format: date }
    XRateLimitLimit:
      description: Requests-per-minute cap for the authenticated plan.
      schema: { type: integer }
    XRateLimitRemaining:
      description: Requests remaining in the current sliding window.
      schema: { type: integer }
    XRateLimitReset:
      description: Seconds until the current window's usage resets.
      schema: { type: integer }

  responses:
    Unauthorized:
      description: Missing or invalid API key
      content:
        application/json:
          schema:
            type: object
            properties: { error: { type: string } }
    RateLimited:
      description: Requests-per-minute limit exceeded for the authenticated plan
      content:
        application/json:
          schema:
            type: object
            properties: { error: { type: string } }

  schemas:
    ParseErrorBody:
      type: object
      properties:
        valid: { type: boolean, enum: [false] }
        error: { type: string }
        request_id: { type: string }

    ConfidenceNoneLowMediumHigh:
      type: string
      enum: [none, low, medium, high]

    VendorBlock:
      type: object
      description: One IEEE-assigned MAC/OUI prefix block, as returned by /v1/vendors.
      properties:
        prefix_int: { type: integer, description: The block's registered prefix, left-justified into the high bits of a 48-bit value. }
        mask_bits: { type: integer, enum: [24, 28, 36] }
        block_type: { type: string, enum: [MA-L, MA-M, MA-S, IAB, CID] }
        organization: { type: string }
        address: { type: string }
        country: { type: string, description: ISO 3166-1 alpha-2, empty if not extracted. }
        is_private: { type: boolean }
        first_seen_at: { type: string, format: date-time }
        last_changed_at: { type: string, format: date-time }

    VendorSearchResult:
      type: object
      properties:
        total: { type: integer, description: How many blocks match, independent of the limit applied. }
        blocks:
          type: array
          items: { $ref: "#/components/schemas/VendorBlock" }

    DeviceCategory:
      type: string
      description: >
        Controlled taxonomy. "unknown" when the vendor is too broad or no
        vendor profile exists in this deployment's starter dataset: most
        registered organizations fall here today.
      enum:
        - computer
        - smartphone
        - tablet
        - router
        - switch
        - wireless_access_point
        - firewall
        - server
        - storage
        - printer
        - camera
        - smart_tv
        - media_device
        - gaming_console
        - iot
        - embedded_device
        - industrial
        - medical
        - automotive
        - virtual_machine
        - container
        - network_interface
        - consumer_electronics
        - unknown

    Result:
      type: object
      description: >
        The x-added-in-version extension on a property marks it as added
        after the original v1 shape shipped; every such field is nullable
        or safely defaulted.
      required:
        - mac
        - valid
        - oui
        - registered
        - transmission_type
        - administration_type
        - locally_administered
        - potentially_randomized
        - randomization_confidence
        - vendor_lookup_reliable
        - is_zero
        - is_broadcast
        - explanation
        - is_private
        - device
        - virtualization
        - special_use
        - vendor_location
        - randomization
        - local_vendor_derivation
        - meta
      properties:
        mac: { type: string, description: Canonical colon-separated uppercase form. }
        valid: { type: boolean }
        oui:
          type: string
          description: Always the first 24 bits of the address itself, regardless of matched block width. See matched_prefix for the complete matched registry block.
        organization: { type: [string, "null"] }
        vendor_address: { type: [string, "null"] }
        country: { type: [string, "null"], description: ISO 3166-1 alpha-2, extracted from vendor_address. }
        block_type: { type: [string, "null"], enum: [MA-L, MA-M, MA-S, IAB, CID, null] }
        address_capacity: { type: [integer, "null"] }
        range_start: { type: [string, "null"] }
        range_end: { type: [string, "null"] }
        registered: { type: boolean }
        transmission_type: { type: string, enum: [unicast, multicast, broadcast] }
        administration_type: { type: string, enum: [universally_administered, locally_administered] }
        locally_administered: { type: boolean }
        slap_quadrant: { type: [string, "null"], enum: [AAI, ELI, reserved, SAI, null] }
        eui64: { type: [string, "null"] }
        ipv6_link_local: { type: [string, "null"] }
        potentially_randomized: { type: boolean }
        randomization_confidence: { type: string, enum: [none, possible, likely] }
        vendor_lookup_reliable: { type: boolean }
        is_zero: { type: boolean }
        is_broadcast: { type: boolean }
        explanation: { type: string }
        is_private: { type: boolean, deprecated: true, description: "Use organization === null and vendor_lookup_reliable instead." }

        matched_prefix:
          type: [string, "null"]
          x-added-in-version: "1.1"
          description: The complete registered prefix actually matched, at its real width (colon-separated bytes plus a trailing bare hex nibble for a non-byte-aligned width like /28 or /36). Null when unregistered.
        prefix_length:
          type: [integer, "null"]
          x-added-in-version: "1.1"

        registry:
          x-added-in-version: "1.1"
          oneOf:
            - type: "null"
            - type: object
              properties:
                source: { type: string, enum: [IEEE] }
                record_type: { type: string, enum: [MA-L, MA-M, MA-S, IAB, CID] }
                record_updated_at:
                  type: [string, "null"]
                  format: date
                  description: "Always null today: IEEE's public feeds carry no per-record update-date column."
                database_synced_at: { type: [string, "null"], format: date-time }

        device:
          x-added-in-version: "1.1"
          type: object
          properties:
            category: { $ref: "#/components/schemas/DeviceCategory" }
            possible_categories: { type: array, items: { $ref: "#/components/schemas/DeviceCategory" } }
            confidence: { $ref: "#/components/schemas/ConfidenceNoneLowMediumHigh" }
            inference_source: { type: [string, "null"], enum: [vendor_profile, null] }
            exact_model_known: { type: boolean, enum: [false], description: "Always false: a MAC address alone never identifies an exact model." }

        virtualization:
          x-added-in-version: "1.1"
          type: object
          properties:
            detected: { type: boolean }
            platform: { type: [string, "null"] }
            confidence: { type: string, enum: [none, low, high, exact] }
            signals: { type: array, items: { type: string } }

        special_use:
          x-added-in-version: "1.1"
          type: object
          properties:
            detected: { type: boolean }
            type: { type: [string, "null"] }
            protocol: { type: [string, "null"] }
            name: { type: [string, "null"] }
            source: { type: [string, "null"] }
            confidence: { type: string, enum: [none, high, exact] }

        vendor_location:
          x-added-in-version: "1.1"
          type: object
          properties:
            raw: { type: [string, "null"] }
            address_line: { type: [string, "null"] }
            city: { type: [string, "null"] }
            region: { type: [string, "null"] }
            postal_code: { type: [string, "null"] }
            country_code: { type: [string, "null"] }
            country_name: { type: [string, "null"] }
            parse_confidence: { type: string, enum: [none, low, medium] }

        randomization:
          x-added-in-version: "1.1"
          type: object
          description: Machine-readable explanation of potentially_randomized/randomization_confidence, cross-checked against virtualization.
          properties:
            potentially_randomized: { type: boolean }
            confidence: { type: string, enum: [none, possible, likely] }
            signals: { type: array, items: { type: string } }
            alternative_explanations: { type: array, items: { type: string } }

        local_vendor_derivation:
          x-added-in-version: "1.2"
          type: object
          description: >
            Best-effort vendor recovery for a locally administered unicast
            address that looks formed by setting the U/L bit on a real IEEE
            assignment (multi-BSSID Wi-Fi APs, Wi-Fi Direct / P2P
            interfaces, naive MAC spoofing), rather than by OS privacy
            randomization. detected is true only when clearing the U/L bit
            yields a prefix that matches a registered block, the address is
            not already registered, it is unicast, it is not an
            SAI-quadrant protocol address, and its suffix is not all zero.
            confidence is always "low": a match is strong evidence the bits
            came from that OUI, but cannot tell an AP's own BSSID from a
            spoofer who chose that OUI. This is never a decode of OS
            randomization, whose 46 bits are uniformly random.
          properties:
            detected: { type: boolean }
            method: { type: string, enum: ["", ul_bit_flip] }
            universal_mac:
              type: [string, "null"]
              description: The address actually looked up, i.e. this address with the U/L bit cleared. Null when detected is false.
            confidence: { type: string, enum: [none, low] }
            organization: { type: [string, "null"], description: Registered organization behind the cleared prefix. Null when the block is private or nothing was derived. }
            country: { type: [string, "null"], description: ISO 3166-1 alpha-2 of the derived block. }
            matched_prefix: { type: [string, "null"] }
            block_type: { type: [string, "null"], enum: [MA-L, MA-M, MA-S, IAB, CID, null] }
            lookup_url: { type: [string, "null"], format: uri }
            device:
              oneOf:
                - type: "null"
                - type: object
                  description: enrich device-category inference run against the derived organization; same shape as the top-level device object.
                  properties:
                    category: { $ref: "#/components/schemas/DeviceCategory" }
                    possible_categories: { type: array, items: { $ref: "#/components/schemas/DeviceCategory" } }
                    confidence: { $ref: "#/components/schemas/ConfidenceNoneLowMediumHigh" }
                    inference_source: { type: [string, "null"], enum: [vendor_profile, null] }
                    exact_model_known: { type: boolean, enum: [false] }
            signals: { type: array, items: { type: string } }

        assignment:
          x-added-in-version: "1.1"
          oneOf:
            - type: "null"
            - type: object
              properties:
                registered_at:
                  type: [string, "null"]
                  description: "Always null: no authoritative IEEE registration date exists in the source feed."
                first_seen_at: { type: [string, "null"], format: date, description: When this deployment first observed the record, not an IEEE date. }
                last_changed_at: { type: [string, "null"], format: date }

        vendor:
          x-added-in-version: "1.1"
          description: "Conservative canonical identity: a mechanical slug of the exact registered name, never a merge of spelling variants or subsidiaries."
          oneOf:
            - type: "null"
            - type: object
              properties:
                id: { type: string }
                registered_name: { type: string }
                canonical_name: { type: string }
                slug: { type: string }
                block_count: { type: integer }
                lookup_url: { type: string, format: uri }

        meta:
          x-added-in-version: "1.1"
          type: object
          properties:
            request_id: { type: string }
            api_version: { type: string, enum: ["v1"] }
            database_version: { type: [string, "null"], format: date }
            processed_at: { type: string, format: date-time }
            cached: { type: boolean }

    BatchItem:
      allOf:
        - { $ref: "#/components/schemas/Result" }
        - type: object
          properties:
            input: { type: string, description: The original input string as submitted. }
            error: { type: string, description: Present only when this entry failed to resolve. }