Exa MCP Server
for AI Agents
Connect your AI agent to StackOne's Exa MCP server and give it 35 MCP tools out of the box. Auth, tool execution, and security all managed.
StackOne 
Coverage
35 Agent Actions
Create, read, update, and delete across Exa — and extend your agent's capabilities with custom actions.
Authentication
Agent Tool Authentication
Per-user OAuth in one call. Your Exa MCP server gets session-scoped tokens with zero credentials stored on your infra.
Agent Auth →
Security
Agent Protection
Every Exa 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 Exa call.
Tools Discovery →What is the Exa MCP Server?
A Exa MCP server lets AI agents read and write Exa data through the Model Context Protocol — Anthropic's open standard for connecting LLMs to external tools. StackOne's Exa MCP server ships with 35 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 Exa MCP Tools
Every action from Exa's API, ready for your agent. Create, read, update, and delete — scoped to exactly what you need.
Events
- List Events
List all events that have occurred in the system. You can paginate through the results using the `cursor` parameter.
- Get Event
Get a single Event by id. You can subscribe to Events by creating a Webhook.
Monitor Runs
- List Monitor Runs
Lists all runs for the Monitor.
- Get Monitor Run
Gets a specific monitor run.
Monitors
- Create Monitor
Create a Monitor that re-runs a Webset search on a schedule to keep the Webset updated with fresh items.
- List Monitors
Lists all monitors for the Webset.
- Get Monitor
Retrieve a single Websets Monitor by its ID, including its schedule and behavior.
- Update Monitor
Updates a monitor configuration.
- Delete Monitor
Permanently delete a Websets Monitor by its ID.
Webset Enrichments
- Create Webset Enrichment
Create an Enrichment for a Webset.
- Get Webset Enrichment
Retrieve a single enrichment on a Webset by the Webset ID and enrichment ID.
- Update Webset Enrichment
Update an Enrichment configuration for a Webset.
- Delete Webset Enrichment
When deleting an Enrichment, any running enrichments will be canceled and all existing `enrichment_result` generated by this Enrichment will no longer be available.
Webset Items
- List Webset Items
Returns a list of Webset Items. You can paginate through the Items using the `cursor` parameter.
- Get Webset Item
Retrieve a single item within a Webset by the Webset ID and item ID.
- Delete Webset Item
Deletes an Item from the Webset. This will cancel any enrichment process for it.
Webset Searchs
- Create Webset Search
Creates a new Search for the Webset. The default behavior is to reuse the previous Search results and evaluate them against the new criteria.
- Get Webset Search
Retrieve a single search on a Webset by the Webset ID and search ID.
Websets
- Create Webset
Creates a new Webset with optional search, import, and enrichment configurations. The Webset will automatically begin processing once created. You can specify an `externalId` to reference the Webset with your own identifiers for easier integration.
- List Websets
Returns a list of Websets. You can paginate through the results using the `cursor` parameter.
- Get Webset
Retrieve a single Webset by its ID, optionally expanding its items.
- Update Webset
Update the metadata of an existing Webset identified by its ID.
- Delete Webset
Deletes a Webset. Once deleted, the Webset and all its Items will no longer be available.
Other (12)
- Create Import
Create an Import to upload external data into Websets for enrichment, search, or exclusion.
- Get Contents
Retrieve cleaned page contents (text, highlights, and/or summary) for one or more URLs or Exa result IDs.
- List Imports
Lists all imports for the Webset.
- Get Import
Retrieve a single Websets Import by its ID, including its status and configuration.
- Search
Perform a search with an Exa prompt-engineered query and retrieve a list of relevant results. Optionally get contents.
- Update Import
Updates a import configuration.
- Delete Import
Permanently delete a Websets Import by its ID.
- Generate Answer
Performs a search based on the query and generates either a direct answer or a detailed summary with citations, depending on the query type.
- Cancel Webset Enrichment
All running enrichments will be canceled. You can not resume an Enrichment after it has been canceled.
- Cancel Webset Search
Cancels a currently running Search. You can cancel all searches at once by using the `websets/:webset/cancel` endpoint.
- Cancel Webset
Cancels all operations being performed on a Webset. Any enrichment or search will be stopped and the Webset will be marked as `idle`.
- Preview Webset
Preview how a search query will be decomposed before creating a webset. This endpoint performs the same query analysis that happens during webset creation, allowing you to see the detected entity type, generated search criteria, and available enrichment columns in advance. Use this to help users understand how their search will be interpreted before committing to a full webset creation.
Set Up Your Exa MCP Server in Minutes
One endpoint. Any framework. Your agent is talking to Exa 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 AI & ML MCP Servers
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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
Exa MCP Server FAQ
Does StackOne have a Exa MCP server?
Exa MCP server vs direct API integration — what's the difference?
How does Exa authentication work for AI agents?
origin_owner_id.Are Exa MCP tools vulnerable to prompt injection?
What is the context bloat of a Exa agent and how do I avoid it?
Can I limit which actions my Exa agent can access?
Can I create custom agent actions for my Exa MCP server?
When should I NOT use a Exa MCP server?
What AI frameworks and AI clients does the StackOne Exa 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.