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Oneflow MCP Server
for AI Agents

Connect your AI agent to StackOne's Oneflow MCP server and give it 53 MCP tools out of the box. Auth, tool execution, and security all managed.

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Oneflow MCP Server
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53 Agent Actions

Create, read, update, and delete across Oneflow — and extend your agent's capabilities with custom actions.

MCP Actions → Build Actions →

Authentication

Agent Tool Authentication

Per-user OAuth in one call. Your Oneflow MCP server gets session-scoped tokens with zero credentials stored on your infra.

Agent Auth →

Security

Agent Protection

Every Oneflow tool response scanned for prompt injection in milliseconds — 88.7% accuracy, all running on CPU.

Prompt Injection Defense →

Performance

Max Agent Context. Min Cost.

Free up to 96% of your agent's context window to enhance reasoning and reduce cost, on every Oneflow call.

Tools Discovery →

What is the Oneflow MCP Server?

A Oneflow MCP server lets AI agents read and write Oneflow data through the Model Context Protocol — Anthropic's open standard for connecting LLMs to external tools. StackOne's Oneflow MCP server ships with 53 pre-built actions, fully extensible via the Connector Builder — plus managed authentication, prompt injection defense, observability, and agent execution runtime. Connect it from MCP clients like Claude Desktop, Claude Code, Cursor, Goose, and VS Code, or from agent frameworks like OpenAI Agents SDK, LangChain, and Vercel AI SDK.

All Oneflow MCP Tools

Every action from Oneflow's API, ready for your agent. Create, read, update, and delete — scoped to exactly what you need.

Contracts

  • Create Contract

    Create a new contract based on a selected template

  • Publish Contract

    Publish a contract and send it to participants

  • Import Contract

    Import a contract into Oneflow

  • List Contracts

    Retrieve a list of contracts from your Oneflow account

  • Get Contract

    Retrieve a specific contract by its ID

  • Update Contract

    Update a specific contract by its ID

  • Delete Contract

    Delete a specific contract by its ID

Contract Partys

  • Create Contract Party

    Create a party in a Oneflow contract

  • Get Contract Party

    Retrieve a specific party from a Oneflow contract by its ID

  • Update Contract Party

    Update a party in a Oneflow contract

  • Delete Contract Party

    Delete a specific party from a Oneflow contract by its ID

Contract Participants

  • Create Contract Participant

    Add a new participant to an existing contract party

  • Get Contract Participant

    Retrieve a specific participant from a contract party by its ID

  • Update Contract Participant

    Update a participant in a Oneflow contract

  • Delete Contract Participant

    Delete a specific participant from a contract party by its ID

Contract Data Fields

  • List Contract Data Fields

    Retrieve the list of data fields for a specific Oneflow contract

  • Get Contract Data Field

    Retrieve a specific data field from a Oneflow contract by its ID

  • Update Contract Data Fields

    Update one or multiple data field values in a Oneflow contract

  • Update Contract Data Field

    Update a single data field value in a Oneflow contract

Contract Files

  • Upload Contract File

    Upload a file to a specific file group in a Oneflow contract

  • List Contract Files

    Retrieve the list of all files available for a specific Oneflow contract

  • Download Contract File

    Download a specific file from a Oneflow contract by its ID

Contract Products

  • List Contract Products

    Retrieve the list of products in a specific Oneflow contract

  • Get Contract Product

    Retrieve a specific product from a Oneflow contract by its ID

  • Update Contract Product

    Update a specific product in a Oneflow contract by its ID

Templates

  • List Templates

    Retrieve a list of templates available in your Oneflow account

  • Get Template

    Retrieve a specific template by its ID

Template Types

  • Create Template Type

    Create a new template type in your Oneflow account

  • List Template Types

    Retrieve a list of template types available in your Oneflow account

  • Get Template Type

    Retrieve a specific template type by its ID

Tags

  • Create Tag

    Create a new tag in your Oneflow account

  • List Tags

    Retrieve a list of all tags for your Oneflow account

  • Get Tag

    Retrieve a specific tag by its ID

  • Update Tag

    Update a specific tag by its ID

  • Delete Tag

    Delete a specific tag by its ID

Webhooks

  • Create Webhook

    Create a new webhook in your Oneflow account

  • List Webhooks

    Retrieve the list of webhooks from your Oneflow account

  • Get Webhook

    Retrieve a specific webhook by ID

  • Update Webhook

    Update an existing webhook by ID

  • Delete Webhook

    Delete a webhook by ID

Contacts

  • Create Contact

    Create a new contact within a workspace

  • List Contacts

    Retrieve the list of contacts in a workspace

  • Get Contact

    Retrieve a specific contact by ID

  • Update Contact

    Update an existing contact by ID

  • Delete Contact

    Delete a contact by ID

Workspaces

  • List Workspaces

    Retrieve the list of workspaces available for the authenticated user in your Oneflow account

  • Get Workspace

    Retrieve a specific workspace by its unique ID from your Oneflow account

Other (6)

  • Create Participant Access Link

    Create an access link to a contract for a specific participant

  • List Contract Parties

    Retrieve the list of parties for a specific Oneflow contract

  • List Users

    Retrieve a list of all users from your Oneflow account

  • Get Account

    Retrieve information about the current Oneflow account

  • Mark Contract As Signed

    Mark a contract as signed by all users

  • Decline Contract

    Decline a contract by its ID

Set Up Your Oneflow MCP Server in Minutes

One endpoint. Any framework. Your agent is talking to Oneflow in under 10 lines of code.

MCP Clients

Claude Desktop setup guide
Claude Code setup guide
Cursor setup guide
Goose setup guide

Agent Frameworks

Claude Desktop
{
  "mcpServers": {
    "stackone": {
      "command": "npx",
      "args": [
        "-y",
        "mcp-remote@latest",
        "https://api.stackone.com/mcp?x-account-id=<account_id>",
        "--header",
        "Authorization: Basic <YOUR_BASE64_TOKEN>"
      ]
    }
  }
}

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Platform Resources

MCP Code Mode: Keeping Tool Responses Out of Agent Context

Anthropic's code_execution processes data already in context. Custom MCP code mode keeps raw tool responses in a sandbox. 14K tokens vs 500.

11 min

Comparing BM25, TF-IDF, and Hybrid Search for MCP Tool Discovery

Benchmarking BM25, TF-IDF, and hybrid search for MCP tool discovery across 916 tools. The 80/20 TF-IDF/BM25 hybrid hits 21% Top-1 accuracy in under 1ms.

10 min

Indirect Prompt Injection Defense for MCP Tools: A Technical Guide

MCP tools that read emails, CRM records, and tickets are indirect prompt injection vectors. Here's how we built a two-tier defense that scans tool results in ~11ms.

12 min

MCP vs A2A: Architecture, Security, and When to Use Each

MCP vs A2A: what each protocol standardizes, how they differ, their shared security risks including indirect prompt injection, and when to use one, both, or a hybrid architecture.

12 min

MCP vs API: What 200+ Connector Builds Taught Us

MCP wraps APIs, it doesn't replace them. After building 200+ connectors that serve both, here's when each approach wins.

14 min read

Oneflow MCP Server FAQ

Does StackOne have a Oneflow MCP server?
Yes. StackOne offers a hosted Oneflow MCP server with 53 pre-built actions, and every action is tested and QA'd by StackOne. Connect it to Claude, Cursor, and any other MCP client, or to any agent framework through the AI Action SDK. It ships with managed agent authentication, prompt injection defense, and tool discovery with server-side execution that preserve your agent's context window and keep reasoning performance.
Oneflow MCP server vs direct API integration — what's the difference?
A Oneflow MCP server and direct API integration serve different use cases. Direct API integration is for software-to-software — backend code calling Oneflow. A Oneflow MCP server is for AI agents — MCP clients like Claude and Cursor, plus framework agents built with OpenAI, LangChain, or Vercel AI — discovering and calling Oneflow at runtime. StackOne provides both.
How does Oneflow authentication work for AI agents?
Oneflow authentication for AI agents works through a StackOne Connect Session. Create one via the dashboard or the SDK — you get an auth link and ready-to-paste config for Claude Desktop, Cursor, and other MCP clients. Your user authenticates their own Oneflow account; StackOne handles token exchange, storage, and refresh. Credentials never reach the LLM, and each user is isolated via origin_owner_id.
Are Oneflow MCP tools vulnerable to prompt injection?
Yes — Oneflow MCP tools can be vulnerable to indirect prompt injection. Any tool that reads user-written content — documents, messages, tickets, records, or free-text fields — is a potential vector. StackOne Defender scans every tool response before it enters the agent's context — regex patterns in ~1ms, then a MiniLM classifier in ~4ms. 88.7% accuracy, CPU-only.
What is the context bloat of a Oneflow agent and how do I avoid it?
Context bloat happens when Oneflow tool schemas and API responses eat your Oneflow agent's memory, preventing it from reasoning effectively. A single Oneflow query can return a massive JSON response, and connecting multiple tools compounds the problem. Tools Discovery and Code Mode reduce context bloat — loading only relevant tools per query and keeping raw responses out of the agent's context.
Can I limit which actions my Oneflow agent can access?
Yes — you can limit which actions your Oneflow agent can access directly from the StackOne dashboard. Toggle actions on or off, or restrict them to specific accounts, with no code changes to your agent. Session tokens can be scoped to exact actions so if one leaks, exposure stays contained.
Can I create custom agent actions for my Oneflow MCP server?
Yes — you can create custom agent actions for your Oneflow MCP server using Connector Builder. It's an integration agent your coding assistant (Claude Code, Cursor, or Copilot) can invoke to research Oneflow's API, generate production-ready connector YAML, test against the live API, and validate before you ship.
When should I NOT use a Oneflow MCP server?
Skip a Oneflow MCP server if your integration is purely software-to-software — direct Oneflow API integration is simpler when no AI agent is involved. For deterministic, compliance-critical operations (financial transactions, regulatory reporting), direct API gives you predictable behavior without agent-driven decision-making. MCP shines when AI agents need to dynamically discover and call Oneflow actions at runtime.
What AI frameworks and AI clients does the StackOne Oneflow MCP server support?
The StackOne Oneflow MCP server supports both. MCP clients (paste-and-go apps): Claude Desktop, Claude Code, Cursor, VS Code, Goose. Agent frameworks (code SDKs you build with): OpenAI Agents SDK, Anthropic, Vercel AI, Google ADK, CrewAI, Pydantic AI, LangChain, LangGraph, Azure AI Foundry.

Put your AI agents to work

All the tools you need to build and scale AI agent integrations, with best-in-class connectivity, execution, and security.

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