npm install openapi-sync
# or
npm install -g openapi-sync
# or use directly
npx openapi-sync

# 1. Create config (all settings as flags — no stdin required)
npx openapi-sync init --no-interactive \
  --api-name petstore \
  --api-url https://petstore3.swagger.io/api/v3/openapi.json \
  --output-folder ./src/api \
  --client-type react-query \
  --validation-library zod \
  --config-format typescript \
  --json

# Or for protected specs, configure auth directly on init:
npx openapi-sync init --no-interactive \
  --api-name backend \
  --api-url https://api.example.com/openapi.json \
  --auth-type bearer \
  --auth-token '${env.SPEC_TOKEN}' \
  --preset react-query-zod \
  --json

# 2. Validate config + specs before writing any files
npx openapi-sync validate --json

# 3. Sync — generate types, endpoints, and schemas
npx openapi-sync --json

# 4. Generate a typed API client
npx openapi-sync generate-client --type react-query --json

$ npx openapi-sync --json
{
  "success": true,
  "apis": ["petstore"],
  "filesWritten": ["src/api/petstore/types.ts", "src/api/petstore/endpoints.ts"],
  "endpointCount": 20,
  "warnings": [],
  "errors": [],
  "phases": {
    "sync": { "filesWritten": ["src/api/petstore/types.ts", "src/api/petstore/endpoints.ts"], "endpointCount": 20 },
    "client": { "filesWritten": [], "endpointCount": 20 }
  }
}

$ npx openapi-sync validate --json
{
  "valid": true,
  "apis": { "petstore": { "valid": true, "endpointCount": 20 } },
  "configErrors": []
}

$ npx openapi-sync list-endpoints --json
{
  "petstore": [
    { "name": "getPetById", "method": "GET", "path": "/pet/{petId}", "tags": ["pet"], "summary": "Find pet by ID" },
    { "name": "addPet", "method": "POST", "path": "/pet", "tags": ["pet"], "summary": "Add a new pet" }
  ]
}

$ npx openapi-sync list-endpoints --api petstore --path-contains pet --limit 2 --offset 0 --json

$ npx openapi-sync get-endpoint --api petstore --operation-id getPetById --json

$ npx openapi-sync read-type --api petstore --type-name Pet --json

npx openapi-sync --dry-run --json
npx openapi-sync generate-client --type fetch --dry-run --json

import {
  ValidateConfig,
  Init,
  GenerateClient,
  ListEndpoints,
  GetEndpointDetails,
  ReadGeneratedType,
  Doctor,
  Purge,
} from "openapi-sync";

// Pre-flight check — no files written
const validation = await ValidateConfig({ silent: true });
if (!validation.valid) throw new Error(JSON.stringify(validation));

// Diagnostic health check on config, specs, peer dependencies, and directories
const health = await Doctor({ silent: true });
console.log("Health check:", health.healthy ? "All checks passed" : "Issues detected");

// Inspect API surface with pagination and filtering
const endpoints = await ListEndpoints({
  apiName: "petstore",
  pathContains: "pet",
  limit: 5,
  offset: 0,
  silent: true,
});
console.log(endpoints.petstore.length, "endpoints found");

// Inspect a single endpoint in full detail (4-tier fuzzy matching)
const detail = await GetEndpointDetails({ apiName: "petstore", operationId: "getPetById", silent: true });
console.log(detail.endpoint.path);

// Read an exact generated type declaration (with optional line pagination)
const typeDecl = await ReadGeneratedType({ apiName: "petstore", typeName: "Pet", silent: true });
console.log(typeDecl);

// Sync and get structured result
const syncResult = await Init({ silent: true });
if (!syncResult.success) throw new Error(JSON.stringify(syncResult));
console.log("Files written:", syncResult.filesWritten);

// Generate client
const clientResult = await GenerateClient({ type: "react-query", silent: true });
console.log(JSON.stringify(clientResult));

// Detect and purge stale files from disk
const purgeResult = await Purge({ yes: true, silent: true });
console.log("Purged files:", purgeResult.purged);

npx openapi-sync init