Compatible with every major AI agent and IDE
What is the Library of Congress MCP Server?
Connect your AI agent to the Library of Congress (LOC) and explore the vast digital archives of the United States' oldest federal cultural institution. Access millions of records, from historical newspapers to rare maps and sound recordings.
What you can do
- Global Search — Search across the entire LOC catalog including items, legislation, and blogs using the
searchtool. - Digital Collections — Browse and list all available digital collections or drill down into specific ones like the 'Abraham Lincoln Papers' using
list_collectionsandget_collection_items. - Format-Specific Discovery — Filter your research by specific media types such as maps, audio, or photos with
search_format. - Deep Bibliographic Research — Retrieve detailed metadata and digital resource links for specific items using
get_item. - OCR & Text Analysis — Access full-text OCR, word coordinates, and context snippets for digitized documents via
get_text_service. - Technical Image Metadata — Fetch IIIF technical data for high-resolution images using
get_image_info.
How it works
- Subscribe to this server
- Enter your Library of Congress API Key (optional but recommended for higher rate limits)
- Start researching historical data directly from your MCP-compatible client
Who is this for?
- Researchers & Historians — Instantly find primary sources and bibliographic data without manual catalog navigation.
- Educators & Students — Access digitized manuscripts and historical records for curriculum development.
- Data Scientists — Utilize OCR services and metadata for large-scale historical text analysis.
Built-in capabilities (8)
List items within a specific collection
json for a specific image identifier. Get technical metadata about an image (IIIF)
Get detailed bibliographic data for a single item
g., a specific page of a newspaper) using resource_id. Get access to discrete digitized files
Access full-text OCR, word coordinates, and context snippets
List all digital collections
using a keyword query. Search the entire Library of Congress website
g., maps, photos, audio). Search items of a specific format
Why Windsurf?
Windsurf's Cascade agent chains multiple Library of Congress tool calls autonomously. query data, analyze results, and generate code in a single agentic session. Paste Vinkius Edge URL, reload, and all 8 tools are immediately available. Real-time tool feedback appears inline, so you see API responses directly in your editor.
- —
Windsurf's Cascade agent autonomously chains multiple tool calls in sequence, solving complex multi-step tasks without manual intervention
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Purpose-built for agentic workflows. Cascade understands context across your entire codebase and integrates MCP tools natively
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JSON-based configuration means zero code changes: paste a URL, reload, and all 8 tools are immediately available
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Real-time tool feedback is displayed inline, so you see API responses directly in your editor without switching contexts
Library of Congress in Windsurf
Library of Congress and 4,000+ other MCP servers. One platform. One governance layer.
Teams that connect Library of Congress to Windsurf through Vinkius don't need to source, host, or maintain individual MCP servers. Every tool call runs inside a hardened runtime with credential isolation, DLP, and a signed audit chain.
Raw MCP | Vinkius | |
|---|---|---|
| Server catalog | Find and host yourself | 4,000+ managed |
| Infrastructure | Self-hosted | Sandboxed V8 isolates |
| Credential handling | Plaintext in config | Vault + runtime injection |
| Data loss prevention | None | Configurable DLP policies |
| Kill switch | None | Global instant shutdown |
| Financial circuit breakers | None | Per-server limits + alerts |
| Audit trail | None | Ed25519 signed logs |
| SIEM log streaming | None | Splunk, Datadog, Webhook |
| Honeytokens | None | Canary alerts on leak |
| Custom domains | Not applicable | DNS challenge verified |
| GDPR compliance | Manual effort | Automated purge + export |
Why teams choose Vinkius for Library of Congress in Windsurf
The Library of Congress MCP Server runs on Vinkius-managed infrastructure inside AWS — a purpose-built runtime with per-request V8 isolates, Ed25519 signed audit chains, and sub-40ms cold starts. All 8 tools execute in hardened sandboxes optimized for native MCP execution.
Your AI agents in Windsurf only access the data you authorize, with DLP that blocks sensitive information from ever reaching the model, kill switch for instant shutdown, and up to 60% token savings. Enterprise-grade infrastructure, zero maintenance.

* Every MCP server runs on Vinkius-managed infrastructure inside AWS - a purpose-built runtime with per-request V8 isolates, Ed25519 signed audit chains, and sub-40ms cold starts optimized for native MCP execution. See our infrastructure
How Vinkius secures
Library of Congress for Windsurf
Every tool call from Windsurf to the Library of Congress MCP Server is protected by DLP redaction, cryptographic audit chains, V8 sandbox isolation, kill switch, and financial circuit breakers.
Frequently asked questions
Can I search for items specifically in a format like 'maps' or 'audio'?
Yes! Use the search_format tool and specify the format parameter (e.g., 'maps', 'photos', 'audio') along with your query to get targeted results.
How do I get the full OCR text of a digitized document?
You can use the get_text_service tool. Provide the document segment path and set the full_text parameter to 1 to retrieve the complete OCR transcript.
Can I list items from a specific collection like the Abraham Lincoln papers?
Yes. Use the get_collection_items tool with the collection slug (e.g., 'abraham-lincoln-papers') to see all items contained within that specific archive.
How does Windsurf discover MCP tools?
Windsurf reads the mcp_config.json file on startup and connects to each configured server via Streamable HTTP. Tools are listed in the MCP panel and available to Cascade automatically.
Can Cascade chain multiple MCP tool calls?
Yes. Cascade is an agentic system. it can plan and execute multi-step workflows, calling several tools in sequence to accomplish complex tasks without manual prompting between steps.
Does Windsurf support multiple MCP servers?
Yes. Add as many servers as needed in mcp_config.json. Each server's tools appear in the MCP panel and Cascade can use tools from different servers in a single flow.
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