{"endpoint":"POST /onboard","content_type":"application/json","fields":{"company_name":{"type":"string","required":true,"max":256},"api_url":{"type":"string","format":"url","required":true,"max":2048},"contact_email":{"type":"string","format":"email","required":true,"max":256},"category":{"type":"enum","values":["travel","food","finance","e-commerce","other"],"required":true},"description":{"type":"string","required":true,"max":500},"affiliate_program":{"type":"string","format":"url","required":false,"max":2048},"monthly_volume":{"type":"string","required":false,"max":64}}}