# Industry Classification Code Cross-Walk (NAICS / SIC / ISIC / NACE)

> Industry Classification Code Cross-Walk (NAICS / SIC / ISIC / NACE) is a paid API for AI agents from 2s.io, paid per call via x402, $0.009/call, status unknown (last checked 2026-09-16).

Translates an industry classification code from one major system (NAICS, SIC, ISIC Rev.4, or NACE Rev.2) into equivalent codes and titles across all the other three systems.

## Facts

- Endpoint: GET https://2s.io/api/class/industry-resolve
- Price: $0.009/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/industry-classification-code-cross-walk-naics-sic-isic-nace-11ca7993
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_4LgnPFvhDhywJBsXVg7zq

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability industry-classification-code-cross-walk-naics-sic-isic-nace-11ca7993
```

Example prompt: What are the SIC, ISIC Rev.4, and NACE Rev.2 equivalents of NAICS code 511210? I need to translate this US industry code into the other major classification systems for a cross-border compliance report.

## When to prefer this

Use this endpoint when you need a deterministic, standards-based translation of an industry classification code between NAICS, SIC, ISIC Rev.4, and NACE Rev.2 — particularly for KYC pipelines, procurement systems, ERP integrations, or cross-border regulatory reporting that spans US and EU jurisdictions. Prefer this over general-purpose search or LLM-based guessing when you need the official concordance mapping with provenance and vintage metadata.

## Known failure modes

- Unknown or invalid code for the specified system returns an error or empty mapping
- Codes with no direct concordance entry return partial results with multi-hop derivation noted
- SIC system is retired; no newer NAICS<->SIC table exists beyond the 1997/1987 vintage
- Requesting an unsupported system enum value returns a validation error
- Codes outside the covered vintages may not resolve correctly

## How this service works

Cross-walk an industry classification code across the four major systems: NAICS <-> SIC <-> ISIC Rev.4 <-> NACE Rev.2. Pass the system + code and get the equivalent code(s) in every other system, with official titles where available, plus the vintage of each table used. The deterministic join that lets a KYC, procurement, ERP, or cross-border-reporting agent translate "what industry is this" between the US (NAICS/SIC), international (ISIC), and EU (NACE) standards. Backed by bundled public-domain Census concordances (NAICS<->SIC: 1997 NAICS <-> 1987 SIC; NAICS<->ISIC: 2012 NAICS <-> ISIC Rev.4) and the UNSD ISIC Rev.4 <-> NACE Rev.2 correspondence. Multi-hop links (e.g. SIC->NACE via NAICS->ISIC) are derived and explicitly flagged in notes. SIC is a retired US system; there is no newer NAICS<->SIC table.

## Output

Returns the equivalent industry code(s) and official titles in all three other classification systems (NAICS, SIC, ISIC Rev.4, NACE Rev.2), the vintage of each concordance table used, and notes flagging any multi-hop derivations (e.g. SIC->NACE resolved via NAICS->ISIC).

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method",
    "queryParams"
   ],
   "properties": {
    "type": {
     "const": "http"
    },
    "method": {
     "const": "GET"
    },
    "queryParams": {
     "required": [
      "system",
      "code"
     ],
     "properties": {
      "code": {
       "type": "string",
       "description": "Classification code, e.g. 511210 (NAICS)."
      },
      "system": {
       "enum": [
        "naics",
        "sic",
        "isic",
        "nace"
       ],
       "type": "string",
       "description": "Which system the code is in."
      }
     }
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/industry-classification-code-cross-walk-naics-sic-isic-nace-11ca7993/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from 2s.io](https://www.zero.xyz/host/2s.io/llms.txt)