# Machine Library MCP Server

**Canonical:** https://apis.io/apis/machinelibrary-ai/machine-library-mcp-server/  
**Provider:** Space Frontiers — https://apis.io/providers/machinelibrary-ai/  
**Base URL:** https://mcp.machinelibrary.ai  
**Documentation:** https://machinelibrary.ai/mcp

Machine Library MCP Server is one of 4 APIs that [Space Frontiers](https://apis.io/providers/machinelibrary-ai/) publishes on the [APIs.io](https://apis.io/) network. Tagged areas include MCP, Agent-Native, Retrieval, and Research. The published artifact set on APIs.io includes API documentation and a getting-started guide.

Hosted Streamable-HTTP MCP server at https://mcp.machinelibrary.ai (legacy https://mcp.spacefrontiers.org still served) exposing four read-only, idempotent retrieval tools (spacefrontiers_search_documents, spacefrontiers_search_social, spacefrontiers_fetch_document, spacefrontiers_search_in_document), a hosted spacefrontiers_top_up_balance payment tool, a deep_research_agent prompt and a spacefrontiers://document/{uri_b64} resource template. OAuth 2.1 with PKCE and RFC 7591 dynamic client registration against https://api.spacefrontiers.org, or a Bearer API key. Listed in the official MCP registry as io.github.SpaceFrontiers/mcp; source is MIT-licensed on GitHub.

## Machine-readable artifacts (6)

- **MCPServer** — https://raw.githubusercontent.com/api-evangelist/machinelibrary-ai/refs/heads/main/mcp/machinelibrary-ai-mcp.yml
- **ToolCrosswalk** — https://raw.githubusercontent.com/api-evangelist/machinelibrary-ai/refs/heads/main/mcp/machinelibrary-ai-tool-crosswalk.yml
- **Documentation** — https://machinelibrary.ai/mcp
- **GettingStarted** — https://machinelibrary.ai/install.md
- **SourceCode** — https://github.com/SpaceFrontiers/mcp
- **MCPRegistry** — https://registry.modelcontextprotocol.io/v0/servers?search=spacefrontiers

## Other Space Frontiers APIs (3)

- [Machine Library API](https://apis.io/apis/machinelibrary-ai/machine-library-api/)
- [Machine Library A2A Agent](https://apis.io/apis/machinelibrary-ai/machine-library-a2a-agent/)
- [Hermes Search Engine gRPC API](https://apis.io/apis/machinelibrary-ai/hermes-search-engine-grpc-api/)

## Tags

MCP, Agent-Native, Retrieval, Research

---

Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/machinelibrary-ai/machine-library-mcp-server/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/machinelibrary-ai/.