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How to connect Taggun to Claude

Connect Claude Web, Desktop and Cowork to Taggun MCP. Extract vendor and total from this receipt image url, list all line items from uploaded invoice link, and more using natural language, with authentication handled for you.

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Taggun is a real-time receipt OCR API for extracting structured data from receipt images. Instantly turn receipts into actionable data for expense management and automation.

14 Tools

Introduction

Claude is Anthropic's AI assistant, available on the web, in the desktop app, and on mobile. Cowork is its agent for knowledge work, and it runs on all of those surfaces too. Connected to your apps, Claude can work with your files and services to accomplish complex tasks on your behalf.

This guide walks you through the easiest and most secure way to connect your Taggun account to Claude via Composio Connect, enabling it to extract vendor and total from this receipt image URL, list all line items from uploaded invoice link, validate this receipt URL before submitting expense, and more such actions on your behalf without compromising your account security.

Setup is the same on Claude Web, Desktop, and Cowork, and you only need to do it once. The connector is tied to your account, so it's available in all three.

Also integrate Taggun with

Claude CodeOpenAI Agents SDKClaude Agent SDKCodexOpenClawHermesAtomic AgentGoogle ADKLangChainVercel AI SDKMastra AILlamaIndexCrewAIPydantic AIAutoGen

Connecting Taggun to Claude Web, Desktop, and Cowork

Two ways to add the Composio connector. Pick whichever you prefer.

1. Add with one click

Click the button. Claude opens with the Composio connector filled in. Click Add, then go to step 2.

Add to Claude

Add manually

In Claude Desktop, click Customize in the left sidebar, then select Connectors and click the + icon at the top.

Claude Desktop connectors screen with Add custom connector selected

Click Add custom connector and paste in the Composio MCP server URL:

bash
https://connect.composio.dev/mcp
Add custom connector dialog with Composio MCP server URL

2. Authorize in your browser

Click Connect. You'll be redirected to a browser window where you can authorize Composio to continue.

Composio authorization screen for Claude Web, Desktop, and Cowork

3. Connect your Taggun account

Back in Claude, ask it to connect to Taggun or give it any Taggun-related task.

For example, ask Claude to:

  • "Extract vendor and total from this receipt image URL"
  • "List all line items from uploaded invoice link"
  • "Validate this receipt URL before submitting expense"

It will prompt you to authenticate and authorize access.

That's it. Composio's tools are now available in Claude, and your Taggun account is ready to use.

What is the Taggun Claude Connector, and what's possible with it?

The Taggun MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Taggun account. It provides structured and secure access to real-time receipt OCR and merchant management, so your agent can scan receipts, extract detailed data, validate image URLs, and manage merchant records on your behalf.

  • Instant receipt data extraction: Have your agent process receipt or invoice images via public URLs to pull out structured purchase data quickly and accurately.
  • Detailed line item analysis: Use verbose extraction to get comprehensive data including line items, merchant info, and confidence metrics from receipt images or PDFs.
  • Automated merchant registry management: Export the full list of known merchants for audits or synchronize merchant data directly through your agent.
  • Receipt image URL validation: Let your agent check if a receipt image URL meets campaign and validation requirements before processing.
  • Generate merchant mock CSVs for testing: Easily create sample merchant CSV files to test or bulk import merchant data as part of your automation workflow.

Troubleshooting

1. Why does Claude not use the Composio connector for Taggun?

The connector can show as connected, but Claude must use it in each Taggun conversation.

  • Click + at the lower left of the chat, or type /.
  • Hover Connectors.
  • Turn on Composio.
  • Ask Claude to connect to Taggun again.

2. Why does Claude show an MCP server error before Taggun connects?

Claude can show Couldn't reach the MCP server or Authorization with the MCP server failed when you add the connector for Taggun.

  • Check that the connector URL is https://connect.composio.dev/mcp.
  • Connectors run from Anthropic's cloud, so your device network is usually not the problem.
  • Add the connector again from Customize > Connectors, then ask Claude to connect Taggun.
  • If it fails again, send the error and the ofid_ reference id to support@composio.dev.

3. Why does the Taggun authorization link not work?

The Composio connector is one server. Your Taggun account connects separately when Claude asks for it.

  • If the browser does not open, or the link expires, ask Claude to retry the Taggun connection.
  • Composio creates a fresh Taggun authorization link.
  • Open that link in your browser and finish the Taggun sign-in.

4. Why do Taggun actions fail after they worked before?

The Taggun connection can expire or lose permission.

  • Ask Claude to inspect the Taggun connection.
  • If the connection is unhealthy, disconnect it when Claude prompts you.
  • Reconnect the Taggun account and retry the action.
  • If Claude shows a permission prompt, approve it before Claude changes data in Taggun.
  • If the action still fails with a permission error, check that the connected account has that permission in Taggun itself.

5. How do I switch to a different Taggun account?

Claude can manage the Taggun connection for you.

  • Ask Claude to disconnect or delete the current Taggun account.
  • Ask Claude to connect Taggun again.
  • Open the new Composio authorization link for Taggun.
  • Sign in with the other Taggun account in the browser.
  • After the account connects, ask Claude to retry the Taggun task.

6. Why is my Taggun connection missing in Claude Desktop or on a Team plan?

The connector belongs to your Claude account, so your Taggun connection works in Claude Web, Desktop, and Cowork.

  • In Claude Desktop, open Customize > Connectors.
  • Next to Composio, click ⋮ and click Clear cache.
  • If Taggun tools still do not appear, click ⋮, disconnect, remove the connector, and add it again.
  • On Team or Enterprise, an Owner or Primary Owner must enable the connector before you can connect Taggun.
TOOLS

Supported Tools

Every Taggun action and event your agent gets out of the box.

Add Merchant Name

Tool to add a merchant name keyword to your account's model for predicting merchant names.

Export Known Merchants

Export the complete list of known merchants used for merchant name normalization in Taggun.

Export Known Product Codes

Export the complete list of known product codes used for product normalization and matching in Taggun.

Export Product Categories

Export a list of product categories and descriptions used for product categorization in CSV format.

Generate Merchants CSV

Generate a CSV file with mock merchant data for testing purposes.

Import Known Merchants

Import a list of merchant names and addresses to normalize and match in CSV or TSV format.

Import Known Product Codes

Tool to import a list of product codes in CSV or TSV format for normalization and matching.

Import Product Categories

Import a list of product categories and descriptions for product categorization.

Transcribe Receipt from Base64 Encoded Image

Extract structured data from a receipt or invoice using base64 encoded image data.

Transcribe Receipt Encoded Verbose

Tool to transcribe a receipt using base64 encoded image in JSON payload and return detailed results.

Transcribe Receipt File (Simple)

Tool to upload a receipt or invoice image file and extract basic data including merchant name, total amount, tax amount, and date.

Process Receipt via URL

Extract structured data from a receipt or invoice image using OCR.

URL Validation

Tool to extract and validate receipt data from a URL.

URL Verbose

Tool to process a receipt or invoice from a URL for detailed data extraction.

FRAMEWORKS

How to build Taggun MCP Agent with another framework

Claude Code logo

Claude Code

Use Taggun MCP with Claude Code

OpenAI Agents SDK logo

OpenAI Agents SDK

Use Taggun MCP with OpenAI Agents SDK

Claude Agent SDK logo

Claude Agent SDK

Use Taggun MCP with Claude Agent SDK

Codex logo

Codex

Use Taggun MCP with Codex

OpenClaw logo

OpenClaw

Use Taggun MCP with OpenClaw

Hermes logo

Hermes

Use Taggun MCP with Hermes

Atomic Agent logo

Atomic Agent

Use Taggun MCP with Atomic Agent

Google ADK logo

Google ADK

Use Taggun MCP with Google ADK

LangChain logo

LangChain

Use Taggun MCP with LangChain

Vercel AI SDK logo

Vercel AI SDK

Use Taggun MCP with Vercel AI SDK

Mastra AI logo

Mastra AI

Use Taggun MCP with Mastra AI

LlamaIndex logo

LlamaIndex

Use Taggun MCP with LlamaIndex

CrewAI logo

CrewAI

Use Taggun MCP with CrewAI

Pydantic AI logo

Pydantic AI

Use Taggun MCP with Pydantic AI

AutoGen logo

AutoGen

Use Taggun MCP with AutoGen

FAQ

Frequently asked questions

With a standalone Taggun MCP server, the agents and LLMs can only access a fixed set of Taggun tools tied to that server. However, with the Composio Tool Router, agents can dynamically load tools from Taggun and many other apps based on the task at hand, all through a single MCP endpoint.

Yes, you can. Claude Cowork fully supports MCP integration. You get structured tool calling, message history handling, and model orchestration while Tool Router takes care of discovering and serving the right Taggun tools.

Yes, absolutely. You can configure which Taggun scopes and actions are allowed when connecting your account to Composio. You can also bring your own OAuth credentials or API configuration so you keep full control over what the agent can do.

All sensitive data such as tokens, keys, and configuration is fully encrypted at rest and in transit. Composio is SOC 2 Type 2 compliant and follows strict security practices so your Taggun data and credentials are handled as safely as possible.

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