--- title: "NatWest API: connect it to your AI chat ยท Hypamoon" description: "The NatWest API is documented, but access goes through NatWest first. What it takes to connect it to your AI chat with Hypamoon, with sources." url: https://hypamoon.com/connect-to/natwest --- 1. [Connect to](https://hypamoon.com/connect-to) 2. NatWest Payments and billing # Connect NatWest to Hypamoon Possible, with help from NatWest. The API is documented, but you cannot just create a key: access goes through NatWest first. Possible ## The check Three questions about the API of NatWest, answered from its own docs. **Public API docs**\ **Yes.** NatWest offers Bankline Direct APIs for corporate customers (payments and reconciliation) and Open Banking APIs with a public sandbox portal; the Bankline Direct developer docs are shared after you get in touch. [Read the docs](https://www.natwest.com/corporates/everyday-banking/bankline-direct/bankline-direct-apis/corporates.html) **A key you create yourself**\ **No.** Bankline Direct APIs are subject to status and eligibility, with fees and an implementation manager. Open Banking production needs regulatory permission. [natwest.com](https://www.natwest.com/corporates/everyday-banking/bankline-direct/bankline-direct-apis/corporates.html) **Versions or a changelog**\ **Yes.** The APIs use ISO 20022 formats and the versioned UK Open Banking Standard. [natwest.com](https://www.natwest.com/corporates/everyday-banking/bankline-direct/bankline-direct-apis/corporates.html) **How it signs in**\ OAuth 2.0 and OpenID Connect for Open Banking; Bankline Direct credentials are set up during onboarding. **Webhooks**\ **Not confirmed.** **Hosting**\ Cloud **Condition**\ Bankline Direct APIs need a Bankline Direct agreement with fees. For Open Banking data without that, use a licensed aggregator such as TrueLayer (https://docs.truelayer.com/docs/data-api-basics). ## What you can build Get account information and payment status from Bankline into your own finance tool, and prepare payments for approval, once NatWest has set up Bankline Direct APIs for you. Your chat writes it as a Hypamoon adapter from the docs above. Reading starts after you click Allow in the portal, and every write waits for your approval, one call at a time. [How adapters work](https://hypamoon.com/docs/adapters) ### Good to know - NatWest signs in with OAuth or signed requests only, with tokens that expire. The Hypamoon vault holds a fixed key today, so an adapter for NatWest takes more work: ask your chat to check this first. - Bankline Direct APIs let corporate, commercial and non-bank financial institution customers make Faster Payments, CHAPS and international payments and get account information from their own systems. ## Try it in your chat First get access from NatWest. Then fill in what to read and write, and send it. Say this in your chat > Build the Hypamoon recipe build-an-adapter for NatWest. API docs: https://developer.sandbox.natwest.com/. Read: \[what\]. Write: \[what, or nothing\]. [Open in Claude](https://claude.ai/new?q=Build%20the%20Hypamoon%20recipe%20build-an-adapter%20for%20NatWest.%20API%20docs%3A%20https%3A%2F%2Fdeveloper.sandbox.natwest.com%2F.%20Read%3A%20%5Bwhat%5D.%20Write%3A%20%5Bwhat%2C%20or%20nothing%5D.) In Claude, or another chat with the full Hypamoon connection; adapters are not in ChatGPT yet. You paste the key in the portal, never in the chat. [The full recipe](https://hypamoon.com/r/build-an-adapter) ## Sources Checked on 7 November 2026. - [www.natwest.com/corporates/everyday-banking/bankline-direct/bankline-direct-apis/corporates.html](https://www.natwest.com/corporates/everyday-banking/bankline-direct/bankline-direct-apis/corporates.html) NatWest is a name of its owner, used here only to describe the software. This page is not an official integration and Hypamoon has no partnership with NatWest. Found something that changed? 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Ask the chat to check its API. The same three checks work for any software. Your chat reads the vendor's own docs and tells you what it found. Say this in your chat > Check if \[software\] has an open API that a Hypamoon adapter can use: public API docs, a key or token I can create myself without asking the vendor, and versions or a changelog. Link the pages you used. [Open in Claude](https://claude.ai/new?q=Check%20if%20%5Bsoftware%5D%20has%20an%20open%20API%20that%20a%20Hypamoon%20adapter%20can%20use%3A%20public%20API%20docs%2C%20a%20key%20or%20token%20I%20can%20create%20myself%20without%20asking%20the%20vendor%2C%20and%20versions%20or%20a%20changelog.%20Link%20the%20pages%20you%20used.) [Open in ChatGPT](https://chatgpt.com/?q=Check%20if%20%5Bsoftware%5D%20has%20an%20open%20API%20that%20a%20Hypamoon%20adapter%20can%20use%3A%20public%20API%20docs%2C%20a%20key%20or%20token%20I%20can%20create%20myself%20without%20asking%20the%20vendor%2C%20and%20versions%20or%20a%20changelog.%20Link%20the%20pages%20you%20used.) Fill in the name of your software. Checking needs no connection to Hypamoon. ## Ready to connect NatWest? Connect your chat once, then ask it to build the adapter. [Start free](https://app.hypamoon.com/?mode=signup&utm_source=connect-to&utm_campaign=natwest) Works in Claude, ChatGPT and Copilot. [Add to Claude](https://hypamoon.com/connect?via=connect-to~natwest#claude) [Add to ChatGPT](https://hypamoon.com/connect?via=connect-to~natwest#chatgpt) [Add to Copilot](https://hypamoon.com/docs/microsoft-copilot)