Live 98 Actions

Oneflow MCP Server
for AI Agents

Q: 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.

Connect your AI agent to StackOne's Oneflow MCP server and give it 98 MCP tools out of the box. Auth, tool execution, and security all managed.

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Oneflow MCP Server

Built by

StackOne

Coverage

98 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 98 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

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 (51)

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
Active Check
Responds with 200 OK to any Oneflow webhook delivery that does not carry a usable event.
Contract Create
Triggered by the Oneflow "contract:create" event when the webhook is subscribed to it via the filters EVENT_TYPE rule. Retrieve the contract with get_contract using the eventId (contract.id).
Contract Publish
Triggered by the Oneflow "contract:publish" event when the webhook is subscribed to it via the filters EVENT_TYPE rule. Retrieve the contract with get_contract using the eventId (contract.id).
Contract Sign
Triggered by the Oneflow "contract:sign" event when the webhook is subscribed to it via the filters EVENT_TYPE rule. Retrieve the contract with get_contract using the eventId (contract.id).
Contract Decline
Triggered by the Oneflow "contract:decline" event when the webhook is subscribed to it via the filters EVENT_TYPE rule. Retrieve the contract with get_contract using the eventId (contract.id).
Contract Delete
Triggered by the Oneflow "contract:delete" event when the webhook is subscribed to it via the filters EVENT_TYPE rule. Retrieve the contract with get_contract using the eventId (contract.id).
Contract Restore
Triggered by the Oneflow "contract:restore" event when the webhook is subscribed to it via the filters EVENT_TYPE rule. Retrieve the contract with get_contract using the eventId (contract.id).
Contract Content Update
Triggered by the Oneflow "contract:content_update" event when the webhook is subscribed to it via the filters EVENT_TYPE rule. Retrieve the contract with get_contract using the eventId (contract.id).
Contract Signature Reset
Triggered by the Oneflow "contract:signature_reset" event when the webhook is subscribed to it via the filters EVENT_TYPE rule. Retrieve the contract with get_contract using the eventId (contract.id).
Contract Signing Period Expire
Triggered by the Oneflow "contract:signing_period_expire" event when the webhook is subscribed to it via the filters EVENT_TYPE rule. Retrieve the contract with get_contract using the eventId (contract.id).
Contract Signing Period Revive
Triggered by the Oneflow "contract:signing_period_revive" event when the webhook is subscribed to it via the filters EVENT_TYPE rule. Retrieve the contract with get_contract using the eventId (contract.id).
Contract Workspace Update
Triggered by the Oneflow "contract:workspace_update" event when the webhook is subscribed to it via the filters EVENT_TYPE rule. Retrieve the contract with get_contract using the eventId (contract.id).
Contract Ai Extract Complete
Triggered by the Oneflow "contract:ai_extract:complete" event when the webhook is subscribed to it via the filters EVENT_TYPE rule. Retrieve the contract with get_contract using the eventId (contract.id).
Contract Draft Approval Flow Start
Triggered by the Oneflow "contract:draft_approval_flow:start" event when the webhook is subscribed to it via the filters EVENT_TYPE rule. Retrieve the contract with get_contract using the eventId (contract.id).
Contract Draft Approval Flow Complete
Triggered by the Oneflow "contract:draft_approval_flow:complete" event when the webhook is subscribed to it via the filters EVENT_TYPE rule. Retrieve the contract with get_contract using the eventId (contract.id).
Contract Draft Approval Flow Reset
Triggered by the Oneflow "contract:draft_approval_flow:reset" event when the webhook is subscribed to it via the filters EVENT_TYPE rule. Retrieve the contract with get_contract using the eventId (contract.id).
Contract Lifecycle Settings Update
Triggered by the Oneflow "contract:lifecycle_settings:update" event when the webhook is subscribed to it via the filters EVENT_TYPE rule. Retrieve the contract with get_contract using the eventId (contract.id).
Contract Lifecycle State Start
Triggered by the Oneflow "contract:lifecycle_state:start" event when the webhook is subscribed to it via the filters EVENT_TYPE rule. Retrieve the contract with get_contract using the eventId (contract.id).
Contract Lifecycle State New Period
Triggered by the Oneflow "contract:lifecycle_state:new_period" event when the webhook is subscribed to it via the filters EVENT_TYPE rule. Retrieve the contract with get_contract using the eventId (contract.id).
Contract Lifecycle State Cancel
Triggered by the Oneflow "contract:lifecycle_state:cancel" event when the webhook is subscribed to it via the filters EVENT_TYPE rule. Retrieve the contract with get_contract using the eventId (contract.id).
Contract Lifecycle State Terminate
Triggered by the Oneflow "contract:lifecycle_state:terminate" event when the webhook is subscribed to it via the filters EVENT_TYPE rule. Retrieve the contract with get_contract using the eventId (contract.id).
Contract Lifecycle State End
Triggered by the Oneflow "contract:lifecycle_state:end" event when the webhook is subscribed to it via the filters EVENT_TYPE rule. Retrieve the contract with get_contract using the eventId (contract.id).
Contract Lifecycle Reminder New
Triggered by the Oneflow "contract:lifecycle_reminder:new" event when the webhook is subscribed to it via the filters EVENT_TYPE rule. Retrieve the contract with get_contract using the eventId (contract.id).
Contract Lifecycle Reminder End
Triggered by the Oneflow "contract:lifecycle_reminder:end" event when the webhook is subscribed to it via the filters EVENT_TYPE rule. Retrieve the contract with get_contract using the eventId (contract.id).
Participant Create
Triggered by the Oneflow "participant:create" event when the webhook is subscribed to it via the filters EVENT_TYPE rule. Retrieve the contract with get_contract using the eventId (contract.id).
Participant Publish
Triggered by the Oneflow "participant:publish" event when the webhook is subscribed to it via the filters EVENT_TYPE rule. Retrieve the contract with get_contract using the eventId (contract.id).
Participant Sign
Triggered by the Oneflow "participant:sign" event when the webhook is subscribed to it via the filters EVENT_TYPE rule. Retrieve the contract with get_contract using the eventId (contract.id).
Participant Decline
Triggered by the Oneflow "participant:decline" event when the webhook is subscribed to it via the filters EVENT_TYPE rule. Retrieve the contract with get_contract using the eventId (contract.id).
Participant Signature Reset
Triggered by the Oneflow "participant:signature_reset" event when the webhook is subscribed to it via the filters EVENT_TYPE rule. Retrieve the contract with get_contract using the eventId (contract.id).
Participant Update
Triggered by the Oneflow "participant:update" event when the webhook is subscribed to it via the filters EVENT_TYPE rule. Retrieve the contract with get_contract using the eventId (contract.id).
Participant Delegate
Triggered by the Oneflow "participant:delegate" event when the webhook is subscribed to it via the filters EVENT_TYPE rule. Retrieve the contract with get_contract using the eventId (contract.id).
Participant Delete
Triggered by the Oneflow "participant:delete" event when the webhook is subscribed to it via the filters EVENT_TYPE rule. Retrieve the contract with get_contract using the eventId (contract.id).
Participant Delivery Failure
Triggered by the Oneflow "participant:delivery_failure" event when the webhook is subscribed to it via the filters EVENT_TYPE rule. Retrieve the contract with get_contract using the eventId (contract.id).
Participant First Visit
Triggered by the Oneflow "participant:first_visit" event when the webhook is subscribed to it via the filters EVENT_TYPE rule. Retrieve the contract with get_contract using the eventId (contract.id).
Participant Draft Approval Flow Approve
Triggered by the Oneflow "participant:draft_approval_flow:approve" event when the webhook is subscribed to it via the filters EVENT_TYPE rule. Retrieve the contract with get_contract using the eventId (contract.id).
Participant Draft Approval Flow Reset
Triggered by the Oneflow "participant:draft_approval_flow:reset" event when the webhook is subscribed to it via the filters EVENT_TYPE rule. Retrieve the contract with get_contract using the eventId (contract.id).
Party Create
Triggered by the Oneflow "party:create" event when the webhook is subscribed to it via the filters EVENT_TYPE rule. Retrieve the contract with get_contract using the eventId (contract.id).
Party Update
Triggered by the Oneflow "party:update" event when the webhook is subscribed to it via the filters EVENT_TYPE rule. Retrieve the contract with get_contract using the eventId (contract.id).
Party Delete
Triggered by the Oneflow "party:delete" event when the webhook is subscribed to it via the filters EVENT_TYPE rule. Retrieve the contract with get_contract using the eventId (contract.id).
Product Create
Triggered by the Oneflow "product:create" event when the webhook is subscribed to it via the filters EVENT_TYPE rule. Retrieve the contract with get_contract using the eventId (contract.id).
Product Update
Triggered by the Oneflow "product:update" event when the webhook is subscribed to it via the filters EVENT_TYPE rule. Retrieve the contract with get_contract using the eventId (contract.id).
Product Delete
Triggered by the Oneflow "product:delete" event when the webhook is subscribed to it via the filters EVENT_TYPE rule. Retrieve the contract with get_contract using the eventId (contract.id).
Data Field Update
Triggered by the Oneflow "data_field:update" event when the webhook is subscribed to it via the filters EVENT_TYPE rule. Retrieve the contract with get_contract using the eventId (contract.id).
Comment Create
Triggered by the Oneflow "comment:create" event when the webhook is subscribed to it via the filters EVENT_TYPE rule. Retrieve the contract with get_contract using the eventId (contract.id).
Reminder Expire
Triggered by the Oneflow "reminder:expire" event when the webhook is subscribed to it via the filters EVENT_TYPE rule. Retrieve the contract with get_contract using the eventId (contract.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

Agent Frameworks

Claude Desktop-

JSON

Claude Desktop Docs

{
  "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 98 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.

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Oneflow MCP Serverfor AI Agents