API & open data

Returns an entity with its relations grouped by type, its claims with evidence and sources, and assessments.

curl "https://polityatlas.org/api/v1/entities/polycentric-law?lang=en"

import httpx

r = httpx.get("https://polityatlas.org/api/v1/entities/polycentric-law?lang=en")
entity = r.json()

const res = await fetch("https://polityatlas.org/api/v1/entities/polycentric-law?lang=en");
const entity = await res.json();

{
  "id": 11,
  "slug": "polycentric-law",
  "kind": "concept",
  "title": "Polycentric law",
  "summary": "Several coexisting centres of rule-making and dispute resolution.",
  "review_state": "published",
  "last_verified_at": "2026-10-02T00:00:00Z",
  "relations": [
    {
      "type": "implements",
      "direction": "incoming",
      "label": "implemented by",
      "items": [{ "entity": { "slug": "arbitration", "kind": "mechanism" } }]
    }
  ],
  "claims": [{
    "id": 318,
    "text": "…",
    "epistemic_status": "disputed",
    "verification_status": "verified",
    "evidence": [{ "stance": "supports", "source": { "id": 41 } }]
  }]
}