MOLEG

National Law Information API

Official MOLEG API for searching statutes, administrative rules, local laws, court precedents, Constitutional Court decisions, statutory interpretations, and administrative appeals. Provides over 4.7 million legal records.

What agents get

Statute names, serial numbers, promulgation and enforcement dates, responsible ministries, detail links; precedent case names, case numbers, ruling dates, court names; local-law and administrative-rule records
Legal Q&A, contract and regulation review, precedent analysis, compliance checks, and guidance on administrative procedures

Use cases

Search current statutes by statute name
Look up full statute text
Keyword search for precedents
Search local laws and ordinances
Verify the statute in force as of an enforcement date

Registered APIs (2)

Statute Search lawSearch.do

Unified search across statutes, precedents, local laws, and administrative rules. Select the target with the target parameter

target Required — law (statute) / prec (precedent) / adhmLaw (local law) / ordin (ordinance) / dpc (administrative rule) e.g. law
query Required — Search keyword e.g. 근로기준법
type Optional — JSON or XML e.g. JSON
page Optional e.g. 1
display Optional — Results per page e.g. 10

Returns: Statute serial number, Statute name in Korean, Promulgation date, Enforcement date, Responsible ministry name, Statute category name, Statute detail link, totalCnt

Rate limit: 10,000 calls/day (Per OC auth key)

Statute Detail Lookup lawService.do

Look up the full text of a statute by its serial number (MST)

target Required e.g. law
MST Required — Statute serial number (from the lawSearch result) e.g. 285279
type Optional — HTML or XML e.g. HTML
efYd Optional — Reference enforcement date e.g. 20261008

Returns: Full statute text (article/paragraph/item structure), Supplementary provisions, Enforcement date

Rate limit: 10,000 calls/day

Auth · pricing · terms

Auth	OC — Issued free at open.law.go.kr. Stored only on the proxy server.
Pricing	Free. Auto-approved
License	Public data: attribution required
Redistribution	Allowed (attribution required)
Terms checked	2026-10-10
Apply	Sign up at open.law.go.kr -> Get an OC auth key (auto-approved) Portal
Status	Coming soon (opens after key registration)
Last checked	2026-10-10

How agents call

Call through our proxy. Start with the keyless quick API shown above (no token needed). For the keyed proxy, send X-Agent-Token to POST /agencatalog/api/call with ('service', 'endpoint', 'params'). The full service list is at /agencatalog/api/services.json.

Example: POST /agencatalog/api/call {service:'law-go-kr', endpoint:'lawSearch.do', params:{target:'law', query:'근로기준법'}}

Machine-readable JSON schema

{
  "service": "law-go-kr",
  "name": "National Law Information API",
  "provider": "MOLEG",
  "apis": [
    {
      "id": "lawSearch.do",
      "name": "Statute Search",
      "params": [
        {
          "name": "target",
          "required": true,
          "example": "law",
          "desc": "law (statute) / prec (precedent) / adhmLaw (local law) / ordin (ordinance) / dpc (administrative rule)"
        },
        {
          "name": "query",
          "required": true,
          "example": "근로기준법",
          "desc": "Search keyword"
        },
        {
          "name": "type",
          "required": false,
          "example": "JSON",
          "desc": "JSON or XML"
        },
        {
          "name": "page",
          "required": false,
          "example": "1"
        },
        {
          "name": "display",
          "required": false,
          "example": "10",
          "desc": "Results per page"
        }
      ]
    },
    {
      "id": "lawService.do",
      "name": "Statute Detail Lookup",
      "params": [
        {
          "name": "target",
          "required": true,
          "example": "law"
        },
        {
          "name": "MST",
          "required": true,
          "example": "285279",
          "desc": "Statute serial number (from the lawSearch result)"
        },
        {
          "name": "type",
          "required": false,
          "example": "HTML",
          "desc": "HTML or XML"
        },
        {
          "name": "efYd",
          "required": false,
          "example": "20261008",
          "desc": "Reference enforcement date"
        }
      ]
    }
  ],
  "proxy_call": "POST /agencatalog/api/call",
  "attribution": "Source: MOLEG National Law Information Service (open.law.go.kr)"
}

Notes

API keys live only on the server. Clients asking for keys directly cannot use this route.
Each provider has a daily quota. Over-quota calls return 429 and are blocked.
Provider outages or over-quota errors are passed through. Check the error field before retrying.
Attribution: Source: MOLEG National Law Information Service (open.law.go.kr)

Last checked: 2026-10-10

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