---
title: "Avalara E-Invoicing API · Hypamoon"
description: "The Avalara E-Invoicing API is documented, but access goes through Avalara E-Invoicing first. What it takes to connect it to your AI chat, with sources."
url: https://hypamoon.com/connect-to/avalara-e-invoicing
---

1.  [Connect to](https://hypamoon.com/connect-to)
2.  Avalara E-Invoicing

Payments and billing

# Connect Avalara E-Invoicing to Hypamoon

Possible, with help from Avalara E-Invoicing. The API is documented, but you cannot just create a key: access goes through Avalara E-Invoicing first.

Possible

## The check

Three questions about the API of Avalara E-Invoicing, answered from its own docs.

**Public API docs**\
**Yes.** [Read the docs](https://developer.avalara.com/products/e-invoicing/)

**A key you create yourself**\
**No.** E-invoicing services are provisioned through Avalara onboarding that configures mandates and connectivity. [developer.avalara.com](https://developer.avalara.com/products/e-invoicing/)

**Versions or a changelog**\
**Yes.** Major, minor and patch versions; n and n-1 stay fully supported, and n-2 is decommissioned 18 months after a new major version. [developer.avalara.com](https://developer.avalara.com/api-versioning/)

**How it signs in**\
Credentials come with Avalara onboarding; the method was not confirmed.

**Webhooks**\
**Not confirmed.**

**Hosting**\
Cloud

**Condition**\
Avalara sets up the e-invoicing service and mandates for your company before you get production access.

## Your own e-invoicing flow on Avalara, once onboarding is done.

-   Sending and receiving e-invoices for the mandates Avalara sets up.
-   AI that checks each outgoing invoice for missing fields before it goes out, with a person approving.
-   A screen for your team and an email when an invoice is rejected.

### Ask your chat

Answers straight from your Avalara E-Invoicing data, in Claude or another chat with the full Hypamoon connection.

-   Which invoices were rejected by the receiving network this month?
-   Which customers still need an e-invoicing address?

### On a schedule

Avalara E-Invoicing has no webhooks we could confirm, so an agent checks every 15 minutes and decides what happens next.

1.  Every 15 minutes

    New sales invoices in your own system.

    AI decides

    AI checks VAT numbers, addresses and required fields.

    Then

    Your team gets one email with what is ready to send.

### A screen for your team or customers

An app on your own address, with sign-in, on top of the same Avalara E-Invoicing data.

-   For your team

    Your team sees each invoice with its delivery status per country.

Avalara E-Invoicing stays the core: your chat builds the rest on its API, as an adapter plus an app and agents in your Hypamoon project. Reading starts after you click Allow in the portal. Every change an agent or a chat makes in Avalara E-Invoicing waits for your approval, one call at a time. [How adapters work](https://hypamoon.com/docs/adapters)

### Good to know

-   Set the API version with the avalara-version header. Avalara also offers an SDK and an MCP server for e-invoicing.

## Try it in your chat

First get access from Avalara E-Invoicing. Then fill in what to read and write, and send it.

Say this in your chat

> Build the Hypamoon recipe build-an-adapter for Avalara E-Invoicing. API docs: https://developer.avalara.com/products/e-invoicing/. Read: \[what\]. Write: \[what, or nothing\].

[Open in Claude](https://claude.ai/new?q=Build%20the%20Hypamoon%20recipe%20build-an-adapter%20for%20Avalara%20E-Invoicing.%20API%20docs%3A%20https%3A%2F%2Fdeveloper.avalara.com%2Fproducts%2Fe-invoicing%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.

-   [developer.avalara.com/products/e-invoicing/](https://developer.avalara.com/products/e-invoicing/)
-   [developer.avalara.com/api-versioning/](https://developer.avalara.com/api-versioning/)

Avalara E-Invoicing 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 Avalara E-Invoicing. Found something that changed? Tell us at [support](https://hypamoon.com/support#contact).

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## Tool not listed? 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 Avalara E-Invoicing?

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=avalara-e-invoicing)

Works in Claude, ChatGPT and Copilot. [Add to Claude](https://hypamoon.com/connect?via=connect-to~avalara-e-invoicing#claude) [Add to ChatGPT](https://hypamoon.com/connect?via=connect-to~avalara-e-invoicing#chatgpt) [Add to Copilot](https://hypamoon.com/docs/microsoft-copilot)