MCP server

RealWorldAPIs Official

com.realworldapis/realworldapis

Checked 26 Oct 2026, 08:29 UTC · Connected to it and listed its tools

Evidence-first registry of real-world APIs for AI agents, with verified metadata and comparison.

Source

At a glance

Type

MCP server

Publisher

realworldapis.com (verified by the MCP Registry)

Status

Working at last check

Tools

6

Token cost

About 3,713 tokens per request

Sets up in

Claude Code, Claude Desktop, Codex, Gemini CLI, Cursor, VS Code, Antigravity, ChatGPT, OpenAI API, Grok

Last checked

26 Oct 2026, 08:29 UTC

Connect it to your agent

Add to CursorAdd to VS CodeVS Code Insiders

Opens the app, which shows the server and asks you to confirm. For other apps, copy the setup below.

Claude Code

claude mcp add --transport http realworldapis https://mcp.realworldapis.com/mcp

Claude Desktop

Settings → Connectors → Add custom connector, and paste the URL.

Codex (config.toml)

[mcp_servers.realworldapis]
url = "https://mcp.realworldapis.com/mcp"

Gemini CLI

{"mcpServers":{"realworldapis":{"httpUrl":"https://mcp.realworldapis.com/mcp"}}}

Cursor

{"mcpServers":{"realworldapis":{"url":"https://mcp.realworldapis.com/mcp"}}}

VS Code

{"servers":{"realworldapis":{"type":"http","url":"https://mcp.realworldapis.com/mcp"}}}

Antigravity

agy mcp add realworldapis https://mcp.realworldapis.com/mcp

ChatGPT

Settings → Apps & Connectors → Advanced settings: turn on Developer mode, then Create a connector and paste the URL. Which plans can do this varies.

OpenAI API (Responses tools)

{"type":"mcp","server_label":"realworldapis","server_url":"https://mcp.realworldapis.com/mcp","require_approval":"always"}

Grok (xAI API tools)

{"type":"mcp","server_label":"realworldapis","server_url":"https://mcp.realworldapis.com/mcp"}

Tools

• compare_apis ~441 tokens
  Compare 2–8 already-known APIs side by side using canonical catalog fields plus capability-graph summary fields such as verified capability count, physical consequences, approval relevance and irreversibility. Use get_api for the full decision profile of one API and search_capabilities for capabilit
• find_api_for_task ~1031 tokens
  Find the best APIs for a natural-language physical-world task. Use this for open-ended task or outcome-based recommendations; use search_apis when you already know exact filters, get_api for one known API, or compare_apis for known candidates. Returns an authoritative canonical structured_results sh
• get_api ~218 tokens
  Retrieve one canonical API decision profile when you already know its name or slug. The response includes the full Verified/High capability profile with execution, access, approval, reversibility, physical-consequence and evidence fields. Exact slug or exact API name is preferred; a partial identifi
• search_apis ~825 tokens
  Search the canonical registry when you already know keywords or exact requirements. All supplied filter groups combine with AND logic; array capability filters require every supplied value, and protocol fields match the exact Yes/No/Unknown status, so Unknown never satisfies Yes. Results include eac
• search_capabilities ~881 tokens
  Search the canonical 770-capability Verified/High decision graph directly. Use this when the question is about what an agent can actually do and under what execution conditions: task/capability text, API, category, action type, acted-on object, human approval, physical consequence, irreversibility,
• verify_requirement ~317 tokens
  Verify whether one specific API can satisfy one exact requirement using the canonical Verified/High capability graph plus linked assertion evidence. Returns YES, NO, PARTIAL or UNKNOWN with matched capability, access/setup prerequisites, approval, safety, reversibility, reliability, coverage and oth

Browse

• OpenAPI tools
• Website monitoring
• Hiring and jobs
• APIs and testing
• Running code

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