# How to integrate Flexisign MCP with Atomic Agent ```json { "title": "How to integrate Flexisign MCP with Atomic Agent", "toolkit": "Flexisign", "toolkit_slug": "flexisign", "framework": "Atomic Agent", "framework_slug": "atomic-agent", "url": "https://composio.dev/toolkits/flexisign/framework/atomic-agent", "markdown_url": "https://composio.dev/toolkits/flexisign/framework/atomic-agent.md", "updated_at": "2026-08-11T13:09:42.577Z" } ``` ## 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 Flexisign. 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 Flexisign account. See the [Atomic Agent documentation](https://atomicagent.io/docs/?cta_placement=atomic-agent-docs) for installation instructions. ## Also integrate Flexisign with - [OpenAI Agents SDK](https://composio.dev/toolkits/flexisign/framework/open-ai-agents-sdk) - [Claude Agent SDK](https://composio.dev/toolkits/flexisign/framework/claude-agents-sdk) - [Claude Code](https://composio.dev/toolkits/flexisign/framework/claude-code) - [Claude Cowork](https://composio.dev/toolkits/flexisign/framework/claude-cowork) - [Codex](https://composio.dev/toolkits/flexisign/framework/codex) - [OpenClaw](https://composio.dev/toolkits/flexisign/framework/openclaw) - [Hermes](https://composio.dev/toolkits/flexisign/framework/hermes-agent) - [Google ADK](https://composio.dev/toolkits/flexisign/framework/google-adk) - [LangChain](https://composio.dev/toolkits/flexisign/framework/langchain) - [Vercel AI SDK](https://composio.dev/toolkits/flexisign/framework/ai-sdk) - [Mastra AI](https://composio.dev/toolkits/flexisign/framework/mastra-ai) - [LlamaIndex](https://composio.dev/toolkits/flexisign/framework/llama-index) - [CrewAI](https://composio.dev/toolkits/flexisign/framework/crew-ai) - [Pydantic AI](https://composio.dev/toolkits/flexisign/framework/pydantic-ai) - [AutoGen](https://composio.dev/toolkits/flexisign/framework/autogen) ## TL;DR ### How Atomic Agent connects to Flexisign 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 Flexisign to Atomic Agent ### Connect Flexisign to Atomic Agent - Sign up or sign in to the [Composio dashboard](https://dashboard.composio.dev/?cta_placement=atomic-agent-api-key). 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 Flexisign. It searches Composio for the right tool. - On first use, open the sign-in link returned in the chat. Connect your Flexisign 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 Flexisign MCP server, and what's possible with it? The Flexisign MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Flexisign account. It provides structured and secure access to your e-signature templates, so your agent can perform actions like listing document templates, surfacing available forms, and streamlining your e-signature workflow automatically. - Template discovery and listing: Quickly retrieve and display all available Flexisign templates directly through your agent. - Automated onboarding workflows: Let your agent surface the right template for onboarding, contracts, or agreements without manual searching. - Pre-signature document preparation: Enable your agent to fetch templates so you can prepare documents for signature faster. - Template-driven workflow automation: Use agent-powered discovery to launch automated processes based on the exact templates you need. ## Supported Tools | Tool slug | Name | Description | |---|---|---| | `FLEXISIGN_LIST_TEMPLATES` | List Templates | Tool to list all available document templates. Use when you need to retrieve and display templates from your FlexiSign account after connecting. | ## Supported Triggers None listed. ## 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](/pricing) for the current limits that apply to your connection. ## Complete Code None listed. ## Conclusion ### Use Flexisign from Atomic Agent With your account connected, ask Atomic Agent to work with Flexisign in natural language. You can connect more apps through the same Composio integration as you need them. Visit the [Atomic Agent website](https://atomicagent.io/?cta_placement=atomic-agent-site) or inspect the [Atomic Agent source code](https://github.com/AtomicBot-ai/atomic-agent?cta_placement=atomic-agent-repo). ## How to build Flexisign MCP Agent with another framework - [OpenAI Agents SDK](https://composio.dev/toolkits/flexisign/framework/open-ai-agents-sdk) - [Claude Agent SDK](https://composio.dev/toolkits/flexisign/framework/claude-agents-sdk) - [Claude Code](https://composio.dev/toolkits/flexisign/framework/claude-code) - [Claude Cowork](https://composio.dev/toolkits/flexisign/framework/claude-cowork) - [Codex](https://composio.dev/toolkits/flexisign/framework/codex) - [OpenClaw](https://composio.dev/toolkits/flexisign/framework/openclaw) - [Hermes](https://composio.dev/toolkits/flexisign/framework/hermes-agent) - [Google ADK](https://composio.dev/toolkits/flexisign/framework/google-adk) - [LangChain](https://composio.dev/toolkits/flexisign/framework/langchain) - [Vercel AI SDK](https://composio.dev/toolkits/flexisign/framework/ai-sdk) - [Mastra AI](https://composio.dev/toolkits/flexisign/framework/mastra-ai) - [LlamaIndex](https://composio.dev/toolkits/flexisign/framework/llama-index) - [CrewAI](https://composio.dev/toolkits/flexisign/framework/crew-ai) - [Pydantic AI](https://composio.dev/toolkits/flexisign/framework/pydantic-ai) - [AutoGen](https://composio.dev/toolkits/flexisign/framework/autogen) ## Related Toolkits - [Google Drive](https://composio.dev/toolkits/googledrive) - Google Drive is a cloud storage platform for uploading, sharing, and collaborating on files. It's perfect for keeping your documents accessible and organized across devices. - [Google Docs](https://composio.dev/toolkits/googledocs) - Google Docs is a cloud-based word processor that enables document creation and real-time collaboration. Its seamless sharing and version history make team editing and content management a breeze. - [Google Super](https://composio.dev/toolkits/googlesuper) - Google Super is an all-in-one suite combining Gmail, Drive, Calendar, Sheets, Analytics, and more. It gives you a unified platform to manage your digital life, boosting productivity and organization. - [ActiveMerge](https://composio.dev/toolkits/active_merge) - ActiveMerge is a document automation platform for generating documents, images, merged files, and e-signature workflows. It helps teams turn templates and stored files into finished, shareable documents faster. - [Affinda](https://composio.dev/toolkits/affinda) - Affinda is an AI-powered document processing platform that automates data extraction from resumes, invoices, and more. It streamlines document-heavy workflows by turning files into structured, actionable data. - [Agility cms](https://composio.dev/toolkits/agility_cms) - Agility CMS is a headless content management system for building and managing digital experiences across platforms. It lets teams update content quickly and deliver omnichannel experiences with ease. - [Airparser](https://composio.dev/toolkits/airparser) - Airparser is an AI-powered parser for extracting structured data from emails, documents, PDFs, and files. It turns messy inbound content into clean fields your apps and workflows can use. - [Algodocs](https://composio.dev/toolkits/algodocs) - Algodocs is an AI-powered platform that automates data extraction from business documents. It delivers fast, secure, and accurate processing without templates or manual training. - [Api2pdf](https://composio.dev/toolkits/api2pdf) - Api2Pdf is a REST API for generating PDFs from HTML, URLs, and documents using powerful engines like wkhtmltopdf and Headless Chrome. It streamlines document conversion and automation for developers and businesses. - [Archive.org](https://composio.dev/toolkits/archive_org) - Archive.org is the Internet Archive's digital library of websites, books, audio, video, and images. Use it to preserve, explore, and access historical web captures and public-domain media. - [Aryn](https://composio.dev/toolkits/aryn) - Aryn is an AI-powered platform for parsing, extracting, and analyzing data from unstructured documents. Use it to automate document processing and unlock actionable insights from your files. - [Boldsign](https://composio.dev/toolkits/boldsign) - Boldsign is a digital eSignature platform for sending, signing, and tracking documents online. Organizations use it to automate agreements and manage legally binding workflows efficiently. - [Boloforms](https://composio.dev/toolkits/boloforms) - BoloForms is an eSignature platform built for small businesses, offering unlimited signatures, templates, and forms. It simplifies digital document signing and team collaboration at a predictable, fixed price. - [Box](https://composio.dev/toolkits/box) - Box is a cloud content management and file sharing platform for businesses. It helps teams securely store, organize, and collaborate on files from anywhere. - [Box MCP](https://composio.dev/toolkits/box_mcp) - Box MCP is Box's hosted MCP server that exposes enterprise files, folders, and metadata. It provides secure, centralized access to corporate content for search and management. - [Carbone](https://composio.dev/toolkits/carbone) - Carbone is a blazing-fast report generator that turns JSON data into PDFs, Word docs, spreadsheets, and more using flexible templates. It lets you automate document creation at scale with minimal code. - [Castingwords](https://composio.dev/toolkits/castingwords) - CastingWords is a transcription service specializing in human-powered, accurate transcripts via a simple API. Get seamless audio-to-text conversion for interviews, meetings, podcasts, and more. - [CertSeal](https://composio.dev/toolkits/cert_seal) - CertSeal is an API platform for issuing and managing verifiable digital certificates. Use it to automate trusted certificate workflows for recipients, batches, designs, and webhooks. - [Cloudconvert](https://composio.dev/toolkits/cloudconvert) - CloudConvert is a powerful file conversion service supporting over 200 file formats. It streamlines converting, compressing, and managing documents, media, and more, all in one place. - [Cloudlayer](https://composio.dev/toolkits/cloudlayer) - Cloudlayer is a document and asset generation service for creating PDFs and images via API or SDKs. It lets you automate high-quality doc creation, saving dev time and reducing manual work. ## Frequently Asked Questions ### What are the differences in Tool Router MCP and Flexisign MCP? With a standalone Flexisign MCP server, the agents and LLMs can only access a fixed set of Flexisign tools tied to that server. However, with the Composio Tool Router, agents can dynamically load tools from Flexisign and many other apps based on the task at hand, all through a single MCP endpoint. ### Can I use Tool Router MCP with Atomic Agent? 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 Flexisign tools. ### Can I manage the permissions and scopes for Flexisign while using Tool Router? Yes, absolutely. You can configure which Flexisign 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. ### How safe is my data with Composio Tool Router? 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 Flexisign data and credentials are handled as safely as possible. --- [See all toolkits](https://composio.dev/toolkits) ยท [Composio docs](https://docs.composio.dev/llms.txt)