Expo MCP Server
for AI Agents
Connect your AI agent to StackOne's Expo MCP server and give it 43 MCP tools out of the box. Auth, tool execution, and security all managed.
StackOne 
Coverage
43 Agent Actions
Create, read, update, and delete across Expo — and extend your agent's capabilities with custom actions.
Authentication
Agent Tool Authentication
Per-user OAuth in one call. Your Expo MCP server gets session-scoped tokens with zero credentials stored on your infra.
Agent Auth →
Security
Agent Protection
Every Expo 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 Expo call.
Tools Discovery →What is the Expo MCP Server?
A Expo MCP server lets AI agents read and write Expo data through the Model Context Protocol — Anthropic's open standard for connecting LLMs to external tools. StackOne's Expo MCP server ships with 43 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 Expo MCP Tools
Every action from Expo's API, ready for your agent. Create, read, update, and delete — scoped to exactly what you need.
Accounts
- List Accounts
List the Expo accounts and organizations the authenticated user can access
- Get Account
Retrieve a specific Expo account or organization by ID
Apps
- Create App
Create a new Expo app (project) under an account
- List Apps
List apps (projects) owned by an Expo account with cursor pagination
- Get App
Retrieve a specific Expo app (project) by its ID
- Delete App
Schedule an Expo app (project) for deletion
Builds
- Create Build
Start a new EAS cloud build for Android or iOS
- List Builds
List EAS cloud builds for an app with cursor pagination and optional filters
- Get Build
Retrieve a specific EAS build by ID
- Delete Build
Delete an EAS build record by ID
Submissions
- Create Submission
Submit a build to the App Store or Google Play
- List Submissions
List app-store submissions for an app with cursor pagination
- Get Submission
Retrieve a specific app-store submission by ID
Branchs
- Create Branch
Create a new EAS Update branch for an app
- Get Branch
Retrieve a specific EAS Update branch by ID
- Delete Branch
Delete an EAS Update branch by ID
Channels
- Create Channel
Create a new EAS Update channel for an app
- List Channels
List EAS Update channels for an app with cursor pagination
- Get Channel
Retrieve a specific EAS Update channel by ID
- Update Channel
Update an EAS Update channel's branch mapping
- Delete Channel
Delete an EAS Update channel by ID
Deployments
- List Deployments
List EAS Update deployments (channel + runtime pairings) for an app
- Get Deployment
Retrieve a specific EAS Update deployment by ID
Workflows
- List Workflows
List EAS Workflow definitions for an app
- Get Workflow
Retrieve a specific EAS Workflow definition by ID
Workflow Runs
- List Workflow Runs
List EAS Workflow runs for an app with cursor pagination and optional filters
- Get Workflow Run
Retrieve a specific EAS Workflow run, including its jobs
Environment Variables
- Create Environment Variable
Create an environment variable for an app
- List Environment Variables
List an app's environment variables, optionally scoped to an environment
- Update Environment Variable
Update an existing environment variable
- Delete Environment Variable
Delete an environment variable by ID
Webhooks
- Create Webhook
Create an outbound webhook on an app for build or submit events
- List Webhooks
List the outbound webhooks configured on an app
- Get Webhook
Retrieve a specific webhook by ID
- Update Webhook
Update an existing webhook's URL, event, or secret
- Delete Webhook
Delete a webhook by ID
Other (7)
- Get Current Actor
Retrieve the authenticated Expo actor (user or robot) and the accounts they can access
- List Updates
List over-the-air (EAS Update) updates for an app with cursor pagination
- Get Update
Retrieve a specific EAS Update (OTA) by ID
- List Updates By Group
Retrieve all platform variants of an update that share a group ID
- List Branches
List EAS Update branches for an app with cursor pagination
- Cancel Build
Cancel an in-progress or queued EAS build
- Cancel Submission
Cancel an in-progress or queued app-store submission
Set Up Your Expo MCP Server in Minutes
One endpoint. Any framework. Your agent is talking to Expo 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>"
]
}
}
}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
Expo MCP Server FAQ
Does StackOne have a Expo MCP server?
Expo MCP server vs direct API integration — what's the difference?
How does Expo authentication work for AI agents?
origin_owner_id.Are Expo MCP tools vulnerable to prompt injection?
What is the context bloat of a Expo agent and how do I avoid it?
Can I limit which actions my Expo agent can access?
Can I create custom agent actions for my Expo MCP server?
When should I NOT use a Expo MCP server?
What AI frameworks and AI clients does the StackOne Expo MCP server support?
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.