{"plans":[{"id":"starter","name":"Starter","price_usdc":"5.000000","period_days":30,"includes":["1 API key, valid 30 days from payment","JSON Schema validation: POST /v1/validate/schema","OpenAPI validation: POST /v1/validate/openapi"]}],"payment":{"chain":"Base","chain_id":8453,"token":"USDC","contract":"0x833589fcd6edb6e08f4c7c32d4f71b54bda02913","pay_to":"0x6ac4dddb02eebbbaa855336534f5176f5c188a4b"},"buy_url":"/buy","checkout":"POST /v1/checkout {\"plan\":\"starter\"}"}