SIGN UPLOG IN
X (Twitter)LinkedInGitHubDiscordYouTube

How to connect AnyAPI to Claude

Connect Claude Web, Desktop and Cowork to AnyAPI MCP. Convert usd prices to eur for invoices, check public holidays before scheduling client meetings, and more using natural language, with authentication handled for you.

Get started for freeGet a demo
AnyAPI logoAnyAPI
Api Key

AnyAPI is a marketplace of utility APIs for validation, currency conversion, holidays, documents, and web data. It brings common application workflows together through one practical API platform.

21 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 AnyAPI account to Claude via Composio Connect, enabling it to convert USD prices to EUR for invoices, check public holidays before scheduling client meetings, validate customer email addresses before sending campaigns, 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 AnyAPI with

ChatGPTHermesAtomic Agent

Connecting AnyAPI 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 AnyAPI account

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

For example, ask Claude to:

  • "Convert USD prices to EUR for invoices"
  • "Check public holidays before scheduling client meetings"
  • "Validate customer email addresses before sending campaigns"

It will prompt you to authenticate and authorize access.

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

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

The AnyAPI MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your AnyAPI account. It provides structured and secure access to utility APIs for validation, currency conversion, holiday lookup, document generation, spreadsheet data, and web data, so your agent can validate information, convert currencies, check holidays, create invoices, and manage Google Sheets rows on your behalf.

  • Validation and verification: Have your agent validate email addresses, phone numbers, IBANs, and VAT numbers, or find phone numbers in text with parsed details.
  • Currency, tax, and holiday tools: Direct your agent to convert currencies, list exchange rates, calculate VAT, retrieve VAT rates, and check or list holidays by country and year.
  • Invoice and document generation: Instruct your agent to generate a downloadable PDF invoice with seller, customer, tax, payment, locale, and line item details.
  • Google Sheets management: Let the agent inspect spreadsheet documents, retrieve rows from a tab, append new rows, or delete existing rows.
  • Text and location utilities: Have your agent analyze sentiment in English, Spanish, or Portuguese text, look up approximate details for an IP address, and report email or phone validation results.

Troubleshooting

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

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

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

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

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

  • 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 AnyAPI.
  • If it fails again, send the error and the ofid_ reference id to support@composio.dev.

3. Why does the AnyAPI authorization link not work?

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

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

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

The AnyAPI connection can expire or lose permission.

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

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

Claude can manage the AnyAPI connection for you.

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

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

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

  • In Claude Desktop, open Customize > Connectors.
  • Next to Composio, click ⋮ and click Clear cache.
  • If AnyAPI 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 AnyAPI.
TOOLS

Supported Tools

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

Analyze Sentiment

Classify the sentiment of English, Spanish, or Portuguese text and return the provider's label, score, language, and tokens.

Calculate VAT

Calculate the tax-inclusive total and applicable VAT details for a pre-tax amount and country, optionally considering a VAT number and state code.

Check Holiday

Return holidays AnyAPI reports for a calendar date and country; reported holiday dates can differ from the requested date.

Convert Currency

Convert a monetary amount between two currency codes using the latest available exchange rate.

Create Google Sheet Row

Append a row to a Google Sheets tab.

Delete Google Sheet Row

Permanently delete an existing row from a Google Sheet tab by its row ID.

Find Phone Numbers

Find phone numbers in text and return each number's parsed format, validity, type, and character offsets.

Generate Blog OpenGraph Image

Currently unavailable because AnyAPI's Chromium runtime is failing.

Generate PDF Invoice

Generate and return a downloadable PDF invoice using seller, customer, tax, payment, locale, and up to one line item.

Get Google Sheet Document

Return a Google Sheets document's title, locale, and sheet-tab titles.

Get Google Sheet Rows

Get the JSON payload for one Google Sheets tab as an object or array of row objects.

Get VAT Rates

Return the latest applicable VAT rate and charge treatment for a country and optional VAT number.

List Exchange Rates

Return the latest available exchange rates for every supported currency relative to an optional base currency, or AnyAPI's default when omitted.

List Holidays

List holidays for a country, optionally narrowed by subdivision, language, and year.

Lookup IP

Look up approximate location, timezone, daylight-saving, and country-flag details for an IPv4 or IPv6 address.

Scrape Webpage

Currently unavailable because AnyAPI's Chromium runtime is failing.

Take Website Screenshot

Currently unavailable because AnyAPI's Chromium runtime is failing.

Validate Email

Validate an email address and report syntax, typo, disposable-domain, and MX checks.

Validate IBAN

Validate an IBAN and return its normalized formats plus bank and BIC details.

Validate Phone Number

Validate and parse one phone number into country, type, international, national, and telephone-URI forms.

Validate VAT Number

Validate a VAT number and return its normalized identifier plus country and registered-company details.

FRAMEWORKS

How to build AnyAPI MCP Agent with another framework

ChatGPT logo

ChatGPT

Use AnyAPI MCP with ChatGPT

Hermes logo

Hermes

Use AnyAPI MCP with Hermes

Atomic Agent logo

Atomic Agent

Use AnyAPI MCP with Atomic Agent

FAQ

Frequently asked questions

With a standalone AnyAPI MCP server, the agents and LLMs can only access a fixed set of AnyAPI tools tied to that server. However, with the Composio Tool Router, agents can dynamically load tools from AnyAPI 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 AnyAPI tools.

Yes, absolutely. You can configure which AnyAPI 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 AnyAPI data and credentials are handled as safely as possible.

Start with AnyAPI.It takes 30 seconds.

Managed auth, hosted MCP servers, and every AnyAPI tool your agent needs.Free to start.

Start building