Connect
Optimize
Secure
Live 67 Actions
Accelo MCP Server
for AI Agents
Connect your AI agent to StackOne's Accelo MCP server and give it 67 MCP tools out of the box. Auth, tool execution, and security all managed.
Accelo MCP Server
Built by 
StackOne
StackOne 
Coverage
67 Agent Actions
Create, read, update, and delete across Accelo — and extend your agent's capabilities with custom actions.
Authentication
Agent Tool Authentication
Per-user OAuth in one call. Your Accelo MCP server gets session-scoped tokens with zero credentials stored on your infra.
Agent Auth →
Security
Agent Protection
Every Accelo 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 Accelo call.
Tools Discovery →What is the Accelo MCP Server?
A Accelo MCP server lets AI agents read and write Accelo data through the Model Context Protocol — Anthropic's open standard for connecting LLMs to external tools. StackOne's Accelo MCP server ships with 67 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 Accelo MCP Tools
Every action from Accelo's API, ready for your agent. Create, read, update, and delete — scoped to exactly what you need.
Companys
- Create Company
Create a new company
- Get Company
Retrieve details of a specific company
- Update Company
Update an existing company
- Delete Company
Delete a company
Contacts
- Create Contact
Create a new contact
- List Contacts
Retrieve a list of all contacts
- Get Contact
Retrieve details of a specific contact
- Update Contact
Update an existing contact
- Delete Contact
Delete a contact
Activitys
- Create Activity
Create a new activity
- Get Activity
Retrieve details of a specific activity
- Update Activity
Update an existing activity
Job (Project)s
- Create Job (Project)
Create a new job/project
- Get Job (Project)
Retrieve details of a specific job/project
- Update Job (Project)
Update an existing job/project
- Delete Job (Project)
Delete a job/project
Tasks
- Create Task
Create a new task
- List Tasks
Retrieve a list of all tasks
- Get Task
Retrieve details of a specific task
- Update Task
Update an existing task
- Delete Task
Delete a task
Issue (Ticket)s
- Create Issue (Ticket)
Create a new issue/ticket
- Get Issue (Ticket)
Retrieve details of a specific issue/ticket
- Update Issue (Ticket)
Update an existing issue/ticket
- Delete Issue (Ticket)
Delete an issue/ticket
Invoices
- Create Invoice
Create a new invoice
- List Invoices
Retrieve a list of all invoices
- Get Invoice
Retrieve details of a specific invoice
- Update Invoice
Update an existing invoice
Quotes
- Create Quote
Create a new quote
- List Quotes
Retrieve a list of all quotes
- Get Quote
Retrieve details of a specific quote
- Update Quote
Update an existing quote
Contract (Retainer)s
- Create Contract (Retainer)
Create a new contract/retainer
- Get Contract (Retainer)
Retrieve details of a specific contract/retainer
- Update Contract (Retainer)
Update an existing contract/retainer
Expenses
- Create Expense
Create a new expense
- List Expenses
Retrieve a list of all expenses
- Get Expense
Retrieve a specific expense
- Update Expense
Update an expense
Payments
- Create Payment
Create a new payment
- List Payments
Retrieve a list of all payments
- Get Payment
Retrieve a specific payment
Prospects
- Create Prospect
Create a new sales prospect
- List Prospects
Retrieve a list of all sales prospects
- Get Prospect
Retrieve details of a specific sales prospect
- Update Prospect
Update an existing sales prospect
- Delete Prospect
Delete a sales prospect
Staff Members
- Create Staff Member
Create a new staff member
- Get Staff Member
Retrieve a specific staff member
- Update Staff Member
Update a staff member
Affiliations
- Create Affiliation
Create a new affiliation
- List Affiliations
Retrieve a list of all affiliations
- Get Affiliation
Retrieve a specific affiliation
Milestones
- Create Milestone
Create a new milestone
- List Milestones
Retrieve a list of all milestones
- Get Milestone
Retrieve a specific milestone
Webhooks
- Create Webhook
Create a new webhook
- List Webhooks
Retrieve all webhooks
- Get Webhook
Retrieve a specific webhook
- Update Webhook
Update a webhook
Other (6)
- List Companies
Retrieve a list of all companies
- List Activities
Retrieve a list of all activities
- List Jobs (Projects)
Retrieve a list of all jobs/projects
- List Issues (Tickets)
Retrieve a list of all issues/tickets
- List Contracts (Retainers)
Retrieve a list of all contracts/retainers
- List Staff (Team Members)
Retrieve a list of all staff members
Accelo AI Agent Use Cases
Connect your AI agent to Accelo and help your team scale the sales operations they run by hand today.
Post-Demo Follow-Up
Use StackOne to connect your AI agent to your CRM, email, and calendar tools to automate post-demo follow-up.
View Deal Risk Scoring
Use StackOne to connect your AI agent to your CRM, email, and calendar tools to automate deal risk scoring and pipeline alerts.
View Outbound Prospecting
Use StackOne to connect your AI agent to your CRM, sales engagement, and messaging tools to automate outbound prospecting.
ViewSet Up Your Accelo MCP Server in Minutes
One endpoint. Any framework. Your agent is talking to Accelo in under 10 lines of code.
Agent Frameworks
JSON{
"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>"
]
}
}
}Check More CRM MCP Servers
Salesforce
380+ actions
Keap
158+ actions
Zoho CRM
127+ actions
Pipedrive
121+ actions
Freshsales
120+ actions
HubSpot
106+ actions
Pardot
88+ actions
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
Accelo MCP Server FAQ
Does StackOne have a Accelo MCP server?
Yes. StackOne offers a hosted Accelo MCP server with 67 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.
Accelo MCP server vs direct API integration — what's the difference?
A Accelo MCP server and direct API integration serve different use cases. Direct API integration is for software-to-software — backend code calling Accelo. A Accelo 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 Accelo at runtime. StackOne provides both.
How does Accelo authentication work for AI agents?
Accelo 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 Accelo account; StackOne handles token exchange, storage, and refresh. Credentials never reach the LLM, and each user is isolated via
origin_owner_id.Are Accelo MCP tools vulnerable to prompt injection?
Yes — Accelo 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 Accelo agent and how do I avoid it?
Context bloat happens when Accelo tool schemas and API responses eat your Accelo agent's memory, preventing it from reasoning effectively. A single Accelo 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 Accelo agent can access?
Yes — you can limit which actions your Accelo 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 Accelo MCP server?
Yes — you can create custom agent actions for your Accelo MCP server using Connector Builder. It's an integration agent your coding assistant (Claude Code, Cursor, or Copilot) can invoke to research Accelo's API, generate production-ready connector YAML, test against the live API, and validate before you ship.
When should I NOT use a Accelo MCP server?
Skip a Accelo MCP server if your integration is purely software-to-software — direct Accelo 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 Accelo actions at runtime.
What AI frameworks and AI clients does the StackOne Accelo MCP server support?
The StackOne Accelo 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.