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How to integrate Saperly MCP with Atomic Agent

Connect Atomic Agent to Saperly MCP. List active saperly phone numbers, review saperly call usage this month, and more using natural language, with authentication handled for you.

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Saperly MCP

Api Key

Saperly MCP is an official MCP server for managing Saperly phone numbers, connections, calls, SMS, and usage. It gives developers scoped workspace access through a single API key.

24 Tools

Managed auth

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Introduction

Atomic Agent is an open-source AI agent that runs on your machine and supports local models through llama.cpp. Connect it to 1,500+ apps through Composio, including Saperly.

This guide uses Atomic Agent's built-in Composio integration. You need Atomic Agent v0.5.6 or later, your own Composio API key, and a Saperly account. See the Atomic Agent documentation for installation instructions.

Also integrate Saperly MCP with

ChatGPT Claude Cowork Hermes

How Atomic Agent connects to Saperly

Atomic Agent connects to Composio's Tool Router over Streamable HTTP MCP. It discovers the tools needed for your request, and Composio handles account authentication.

Execution and account-connection tools follow Atomic Agent's configured approval policy. Review any approval prompt before allowing an action on your connected account.

Connect Saperly to Atomic Agent

Sign up or sign in to the Composio dashboard. Copy your API key.
In Atomic Agent, open the Integrations tab and select Composio. Select API key, press e, paste the key, and press Enter. The tools become available immediately, without a restart.
Ask Atomic Agent to do something in Saperly. It searches Composio for the right tool.
On first use, open the sign-in link returned in the chat. Connect your Saperly account, then return to Atomic Agent to continue.

Headless setup

Add the following line to ~/.atomic-agent/.env, replacing YOUR_COMPOSIO_API_KEY with your key. Start Atomic Agent after saving the file.

bash

COMPOSIO_API_KEY=YOUR_COMPOSIO_API_KEY

What is the Saperly MCP server, and what's possible with it?

The Saperly MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Saperly account. It provides structured and secure access to your phone numbers, connections, calls, SMS, voices, and usage, so your agent can manage numbers, configure call handlers, place calls, send messages, and review communication activity on your behalf.

Phone number management: Have your agent search available numbers, provision new lines, list current numbers, assign connections, set caller ID names, configure SMS sender names, or release numbers.
Call handling and control: Let the agent list and retrieve calls, place outbound calls, speak into live calls, and transfer active calls to a phone number or SIP address.
Connection setup: Direct your agent to create, update, sync, list, retrieve, or delete Saperly connections, including changing their mode and call instructions.
SMS communication: Instruct your agent to send SMS messages from your Saperly numbers and review messages, including messages associated with a specific number.
Voice and usage monitoring: Have your agent list available voices and private custom voices, then check workspace call, message, and balance usage.

Use Saperly from Atomic Agent

With your account connected, ask Atomic Agent to work with Saperly in natural language. You can connect more apps through the same Composio integration as you need them.

Visit the Atomic Agent website or inspect the Atomic Agent source code.

Troubleshooting

Why is my API key rejected?

Copy the key directly from the Composio dashboard. Atomic Agent requires ASCII characters because it sends the key in an HTTP header. Remove any extra characters introduced when copying.

Why are Composio tools unavailable after saving a key?

Check that you use Atomic Agent v0.5.6 or later and that Composio is enabled in your configuration. A "composio": { "enabled": false } setting disables the integration while keeping the saved key on disk.

Does Composio have a free plan?

The Hobby plan includes 100,000 tool calls per month. Composio-managed OAuth apps have a lower included allowance. See Composio pricing for the current limits that apply to your connection.

TOOLS

Supported Tools

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

Assign number connection

Attach a connection (the handler that answers calls) to a number — i.

Create connection

Create a connection.

Delete connection

Delete a connection.

Get call

Fetch one call record by its Saperly id.

Get connection

Fetch one connection by its Saperly id.

Get number

Fetch one phone number by its Saperly id.

Get usage

Summarize calls, messages, and the current balance for this workspace.

List calls

List the calls in this workspace.

List connections

List the connections (call/message handlers) configured in this workspace.

List custom voices

List this workspace’s private voices and their processing status.

List messages

List SMS messages in this workspace, optionally filtered to one number.

List numbers

List the active phone numbers (lines) provisioned in this workspace.

List voices

List stock voices and ready private voices.

Place call

Dial an outbound call from one of your numbers.

Provision number

Order a new phone number and add it to this workspace.

Release number

Release a phone number and stop billing it.

Search available numbers

Search available inventory for numbers available to provision, priced for this workspace.

Send sms

Send an SMS from one of your numbers.

Set caller id name

Set (or clear) a line’s outbound CALLER ID NAME — the 1–15 letter/number/space display name (CNAM) shown alongside the number on the called party’s phone.

Set sms sender

Set (or clear) a line’s alphanumeric SMS sender name — the 1–11 letter/number label recipients see as the “from” on INTERNATIONAL SMS only.

Speak into call

Speak a line into a live call.

Sync connection

Reconcile a connection — create/update its assistant and mint its manual-mode secret.

Transfer call

Blind-transfer a live call to another destination — an E.

Update connection

Update a connection’s name, instructions, compliance/disclosure — or switch its mode between hosted (an in-network AI assistant) and manual (your own brain via BYO-LLM).

FRAMEWORKS

How to build Saperly MCP Agent with another framework

ChatGPT

Use Saperly MCP with ChatGPT

Claude Cowork

Use Saperly MCP with Claude Cowork

Hermes

Use Saperly MCP with Hermes

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FAQ

Frequently asked questions

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

Yes, you can. Atomic Agent 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 Saperly tools.

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

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