{"activeVersionTag":"latest","latestAvailableVersionTag":"latest","collection":{"info":{"_postman_id":"13073417-965c-490b-9054-2e75f8fe5d35","name":"NOW Custody","description":"**NOW Custody** **API** is a tool to store your crypto funds and process exchanges, payments, and payouts. To access the NOW Custody API you need to:\n\n1. Generate an API key. You can get one in [your personal partners account](https://changenow.io/affiliate).\n2. Contact our business development team at [api@changenow.io](https://api@changenow.io) to get access to the full API functionality.\n    \n\nThe set of functions available:\n\n- Store crypto assets: secure and clear. Get access to 300+ crypto assets with no need to maintain full nodes and blockchain-related infrastructure.\n- Process on-chain payments: access your assets at any moment to receive and send payments.\n- Create users and operate funds on their behalf - track balances, request payouts and convert crypto via API.\n    \n\n# General Info\n\n**Base URL:** api.changenow.io/v2\n\n**Max Precision:** 6 decimals.\n\n**JWT token:** also mentioned here as 'Bearer token' and 'access token', can be acquired with the ['Auth'](https://documenter.getpostman.com/view/8180765/UVJfhumn#9cdc68aa-70cf-477c-8642-96bd4eda6454), valid for 5 minutes.\n\n**Master account & subaccounts**:\n\n- The master account is considered to be an account, which API key is registered in affiliate program.\n- The subaccount (also referred to as subpartner) - the new user account, which was created by master account.\n    - Its API key is registered in Custody, but not related to the affiliate program directly, therefore subpartner has no access to ChangeNOW API endpoints which require API key authorization.\n\n# Work Flow\n\n#### How to top up balance:\n\n- Get a list of currently available currencies for sell with the '[List of available currencies](https://documenter.getpostman.com/view/8180765/SVfTPnM8?version=latest#f5216aba-6a44-49eb-a075-ad4435aa40db)' method;\n- Call the '[Estimated Exchange Amount](https://documenter.getpostman.com/view/8180765/SVfTPnM8?version=latest#c95b63b2-03e1-4087-95cd-6b43c237dc7f)' method to get the estimated amount for the exchange in case it is needed to convert initial currency to make a deposit in another or to check the estimation of the amount to be credited;\n- Get your `partnerId` with the '[User info](https://documenter.getpostman.com/view/8180765/UVJfhumn#efacbae3-34ee-4494-afba-13650e4f372c)';\n- Create an exchange with the '[Create deposit](https://documenter.getpostman.com/view/8180765/UVJfhumn#a752a458-04f3-4a33-ba5f-26df2e35ea03)', using your `partnerId` as a part of a payout address - 'changenow_partner_partnerId'.","schema":"https://schema.getpostman.com/json/collection/v2.0.0/collection.json","isPublicCollection":false,"owner":"8180765","team":451850,"collectionId":"13073417-965c-490b-9054-2e75f8fe5d35","publishedId":"UVJfhumn","public":true,"publicUrl":"https://documenter-api.postman.tech/view/8180765/UVJfhumn","privateUrl":"https://go.postman.co/documentation/8180765-13073417-965c-490b-9054-2e75f8fe5d35","customColor":{"top-bar":"FFFFFF","right-sidebar":"303030","highlight":"0176ff"},"documentationLayout":"classic-double-column","customisation":null,"version":"8.10.1","publishDate":"2021-12-01T22:37:21.000Z","activeVersionTag":"latest","documentationTheme":"light","metaTags":{},"logos":{}},"statusCode":200},"environments":[],"user":{"authenticated":false,"permissions":{"publish":false}},"run":{"button":{"js":"https://run.pstmn.io/button.js","css":"https://run.pstmn.io/button.css"}},"web":"https://www.getpostman.com/","team":{"logo":"https://res.cloudinary.com/postman/image/upload/t_team_logo_pubdoc/v1/team/805f78d21f6ea886334656e8744808bd70f955ec9e6dba44472ec05e58ede842","favicon":""},"isEnvFetchError":false,"languages":"[{\"key\":\"csharp\",\"label\":\"C#\",\"variant\":\"HttpClient\"},{\"key\":\"csharp\",\"label\":\"C#\",\"variant\":\"RestSharp\"},{\"key\":\"curl\",\"label\":\"cURL\",\"variant\":\"cURL\"},{\"key\":\"dart\",\"label\":\"Dart\",\"variant\":\"http\"},{\"key\":\"go\",\"label\":\"Go\",\"variant\":\"Native\"},{\"key\":\"http\",\"label\":\"HTTP\",\"variant\":\"HTTP\"},{\"key\":\"java\",\"label\":\"Java\",\"variant\":\"OkHttp\"},{\"key\":\"java\",\"label\":\"Java\",\"variant\":\"Unirest\"},{\"key\":\"javascript\",\"label\":\"JavaScript\",\"variant\":\"Fetch\"},{\"key\":\"javascript\",\"label\":\"JavaScript\",\"variant\":\"jQuery\"},{\"key\":\"javascript\",\"label\":\"JavaScript\",\"variant\":\"XHR\"},{\"key\":\"c\",\"label\":\"C\",\"variant\":\"libcurl\"},{\"key\":\"nodejs\",\"label\":\"NodeJs\",\"variant\":\"Axios\"},{\"key\":\"nodejs\",\"label\":\"NodeJs\",\"variant\":\"Native\"},{\"key\":\"nodejs\",\"label\":\"NodeJs\",\"variant\":\"Request\"},{\"key\":\"nodejs\",\"label\":\"NodeJs\",\"variant\":\"Unirest\"},{\"key\":\"objective-c\",\"label\":\"Objective-C\",\"variant\":\"NSURLSession\"},{\"key\":\"ocaml\",\"label\":\"OCaml\",\"variant\":\"Cohttp\"},{\"key\":\"php\",\"label\":\"PHP\",\"variant\":\"cURL\"},{\"key\":\"php\",\"label\":\"PHP\",\"variant\":\"Guzzle\"},{\"key\":\"php\",\"label\":\"PHP\",\"variant\":\"HTTP_Request2\"},{\"key\":\"php\",\"label\":\"PHP\",\"variant\":\"pecl_http\"},{\"key\":\"powershell\",\"label\":\"PowerShell\",\"variant\":\"RestMethod\"},{\"key\":\"python\",\"label\":\"Python\",\"variant\":\"http.client\"},{\"key\":\"python\",\"label\":\"Python\",\"variant\":\"Requests\"},{\"key\":\"r\",\"label\":\"R\",\"variant\":\"httr\"},{\"key\":\"r\",\"label\":\"R\",\"variant\":\"RCurl\"},{\"key\":\"ruby\",\"label\":\"Ruby\",\"variant\":\"Net::HTTP\"},{\"key\":\"shell\",\"label\":\"Shell\",\"variant\":\"Httpie\"},{\"key\":\"shell\",\"label\":\"Shell\",\"variant\":\"wget\"},{\"key\":\"swift\",\"label\":\"Swift\",\"variant\":\"URLSession\"}]","languageSettings":[{"key":"csharp","label":"C#","variant":"HttpClient"},{"key":"csharp","label":"C#","variant":"RestSharp"},{"key":"curl","label":"cURL","variant":"cURL"},{"key":"dart","label":"Dart","variant":"http"},{"key":"go","label":"Go","variant":"Native"},{"key":"http","label":"HTTP","variant":"HTTP"},{"key":"java","label":"Java","variant":"OkHttp"},{"key":"java","label":"Java","variant":"Unirest"},{"key":"javascript","label":"JavaScript","variant":"Fetch"},{"key":"javascript","label":"JavaScript","variant":"jQuery"},{"key":"javascript","label":"JavaScript","variant":"XHR"},{"key":"c","label":"C","variant":"libcurl"},{"key":"nodejs","label":"NodeJs","variant":"Axios"},{"key":"nodejs","label":"NodeJs","variant":"Native"},{"key":"nodejs","label":"NodeJs","variant":"Request"},{"key":"nodejs","label":"NodeJs","variant":"Unirest"},{"key":"objective-c","label":"Objective-C","variant":"NSURLSession"},{"key":"ocaml","label":"OCaml","variant":"Cohttp"},{"key":"php","label":"PHP","variant":"cURL"},{"key":"php","label":"PHP","variant":"Guzzle"},{"key":"php","label":"PHP","variant":"HTTP_Request2"},{"key":"php","label":"PHP","variant":"pecl_http"},{"key":"powershell","label":"PowerShell","variant":"RestMethod"},{"key":"python","label":"Python","variant":"http.client"},{"key":"python","label":"Python","variant":"Requests"},{"key":"r","label":"R","variant":"httr"},{"key":"r","label":"R","variant":"RCurl"},{"key":"ruby","label":"Ruby","variant":"Net::HTTP"},{"key":"shell","label":"Shell","variant":"Httpie"},{"key":"shell","label":"Shell","variant":"wget"},{"key":"swift","label":"Swift","variant":"URLSession"}],"languageOptions":[{"label":"C# - HttpClient","value":"csharp - HttpClient - C#"},{"label":"C# - RestSharp","value":"csharp - RestSharp - C#"},{"label":"cURL - cURL","value":"curl - cURL - cURL"},{"label":"Dart - http","value":"dart - http - Dart"},{"label":"Go - Native","value":"go - Native - Go"},{"label":"HTTP - HTTP","value":"http - HTTP - HTTP"},{"label":"Java - OkHttp","value":"java - OkHttp - Java"},{"label":"Java - Unirest","value":"java - Unirest - Java"},{"label":"JavaScript - Fetch","value":"javascript - Fetch - JavaScript"},{"label":"JavaScript - jQuery","value":"javascript - jQuery - JavaScript"},{"label":"JavaScript - XHR","value":"javascript - XHR - JavaScript"},{"label":"C - libcurl","value":"c - libcurl - C"},{"label":"NodeJs - Axios","value":"nodejs - Axios - NodeJs"},{"label":"NodeJs - Native","value":"nodejs - Native - NodeJs"},{"label":"NodeJs - Request","value":"nodejs - Request - NodeJs"},{"label":"NodeJs - Unirest","value":"nodejs - Unirest - NodeJs"},{"label":"Objective-C - NSURLSession","value":"objective-c - NSURLSession - Objective-C"},{"label":"OCaml - Cohttp","value":"ocaml - Cohttp - OCaml"},{"label":"PHP - cURL","value":"php - cURL - PHP"},{"label":"PHP - Guzzle","value":"php - Guzzle - PHP"},{"label":"PHP - HTTP_Request2","value":"php - HTTP_Request2 - PHP"},{"label":"PHP - pecl_http","value":"php - pecl_http - PHP"},{"label":"PowerShell - RestMethod","value":"powershell - RestMethod - PowerShell"},{"label":"Python - http.client","value":"python - http.client - Python"},{"label":"Python - Requests","value":"python - Requests - Python"},{"label":"R - httr","value":"r - httr - R"},{"label":"R - RCurl","value":"r - RCurl - R"},{"label":"Ruby - Net::HTTP","value":"ruby - Net::HTTP - Ruby"},{"label":"Shell - Httpie","value":"shell - Httpie - Shell"},{"label":"Shell - wget","value":"shell - wget - Shell"},{"label":"Swift - URLSession","value":"swift - URLSession - Swift"}],"layoutOptions":[{"value":"classic-single-column","label":"Single Column"},{"value":"classic-double-column","label":"Double Column"}],"versionOptions":[],"environmentOptions":[{"value":"0","label":"No Environment"}],"canonicalUrl":"https://documenter.gw.postman.com/view/metadata/UVJfhumn"}