NAICS / SIC industry-code lookup API

Look up a NAICS or SIC industry code by number (with NAICS sector context), or search both classification systems by keyword, returning matching codes and titles. The MORE: a curated cross-system table so agents can map between NAICS and legacy SIC and resolve a code to a human-readable industry. Answers 'what is NAICS 541511', 'SIC code for software', 'industry name for this code', 'NAICS to SIC mapping'.

Price$0.01per request

MethodPOST

Route/v1/ref/naics-sic

StatusLive

MIME typeapplication/json

Rate limit60/minute

CacheNo cache

refnaicssicindustry-codeclassificationindustrysectorbusiness-code

API URLhttps://x402.hexl.dev/v1/ref/naics-sic

Integration docs

Example request

{
  "code": "541511"
}

Example response

{
  "code": "541511",
  "naics": {
    "code": "541511",
    "title": "Custom Computer Programming Services",
    "sector": "Professional, Scientific, and Technical Services"
  },
  "sic": null
}

Input schema

{
  "type": "object",
  "required": [],
  "properties": {
    "code": {
      "type": "string",
      "examples": [
        "541511"
      ]
    },
    "query": {
      "type": "string",
      "examples": [
        "software"
      ]
    }
  }
}

Output schema

{
  "type": "object",
  "additionalProperties": true
}