Quartr MCP Server
for AI Agents
Connect your AI agent to StackOne's Quartr 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 Quartr — and extend your agent's capabilities with custom actions.
Authentication
Agent Tool Authentication
Per-user OAuth in one call. Your Quartr MCP server gets session-scoped tokens with zero credentials stored on your infra.
Agent Auth →
Security
Agent Protection
Every Quartr 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 Quartr call.
Tools Discovery →What is the Quartr MCP Server?
A Quartr MCP server lets AI agents read and write Quartr data through the Model Context Protocol — Anthropic's open standard for connecting LLMs to external tools. StackOne's Quartr 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 Quartr MCP Tools
Every action from Quartr's API, ready for your agent. Create, read, update, and delete — scoped to exactly what you need.
Other (35)
- List Audio Recordings
List historical earnings call audio recordings.
- Retrieve An Audio Recording
Retrieve a single audio recording by its id.
- List Audio Chapters
List the chapter markers that structure an audio recording.
- List Companies
List companies covered by Quartr, filtered by identifier, country or exchange.
- Retrieve A Company
Retrieve a single company by its Quartr company id.
- List Company Segments
List the financial segment breakdowns reported by a company.
- List Documents
List reports, slide decks and transcripts together in one query.
- Retrieve A Document
Retrieve a single document by its id, across any document dataset.
- List Document Types
List the document type reference data used to classify documents.
- Retrieve A Document Type
Retrieve a single document type by its id.
- List Events
List company events such as earnings calls and capital markets days.
- Retrieve An Event
Retrieve a single company event by its id.
- Retrieve An Event Summary
Retrieve the AI-generated summary of a company event.
- List Event Types
List the event type reference data used to classify events.
- Retrieve An Event Type
Retrieve a single event type by its id.
- List Live Events
List earnings calls that are live now or about to start.
- Retrieve A Live Event
Retrieve a single live event by its id.
- List Live Audio Streams
List the real-time audio streams for calls in progress.
- Retrieve A Live Audio Stream
Retrieve a single live audio stream by its id.
- List Live Transcripts
List the real-time transcripts for calls in progress.
- Retrieve A Live Transcript
Retrieve a single live transcript by its id.
- List Reports
List company filings and reports.
- Retrieve A Report
Retrieve a single report by its id.
- List Report Pages
List the parsed, page-by-page contents of a report.
- Retrieve A Report Summary
Retrieve the AI-generated summary of a report.
- Retrieve Report Text
Retrieve the full parsed text of a report as a single document.
- List Slide Decks
List investor presentation slide decks.
- Retrieve A Slide Deck
Retrieve a single slide deck by its id.
- List Slide Deck Pages
List the parsed, slide-by-slide contents of a deck.
- Retrieve A Slide Deck Summary
Retrieve the AI-generated summary of a slide deck.
- Retrieve Slide Deck Text
Retrieve the full parsed text of a slide deck as a single document.
- List Transcripts
List historical earnings call transcripts.
- Retrieve A Transcript
Retrieve a single transcript by its id.
- List Transcript Chapters
List the chapter segments that structure a transcript.
- Retrieve A Transcript Summary
Retrieve the AI-generated summary of a transcript.
Set Up Your Quartr MCP Server in Minutes
One endpoint. Any framework. Your agent is talking to Quartr 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 Hundreds of Connector Builds Taught Us
MCP wraps APIs, it doesn't replace them. After building hundreds of connectors that serve both, here's when each approach wins.
14 min read
Quartr MCP Server FAQ
Does StackOne have a Quartr MCP server?
Quartr MCP server vs direct API integration — what's the difference?
How does Quartr authentication work for AI agents?
origin_owner_id.Are Quartr MCP tools vulnerable to prompt injection?
What is the context bloat of a Quartr agent and how do I avoid it?
Can I limit which actions my Quartr agent can access?
Can I create custom agent actions for my Quartr MCP server?
When should I NOT use a Quartr MCP server?
What AI frameworks and AI clients does the StackOne Quartr 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.