APIs & Databases Stateless MCP v2 Verified

OneSimpleAPI

Created by OneSimpleAPI

Hosted Streamable HTTP MCP server exposing utility APIs for website screenshots, QR code generation, image editing, PDF signing, email validation, and FX rates.

Official Website

How to Connect & Install

Select your client or environment below to copy the verified, ready-to-run installation configuration.

1-line autonomous agent setup instruction. Paste into Claude Code, Codex CLI, or Cursor Agent:
Fetch and configure Model Context Protocol (MCP) server OneSimpleAPI from https://www.fastmcp.dev/server/onesimpleapi

Agents automatically discover, install, and execute the server spec without manual token setup.

Connect via direct Stateless MCP v2 / Streamable HTTP endpoint or JSON-RPC:
https://onesimpleapi.com/mcp

Stateless edge endpoint compliant with MCP 2024-11-05 and v2 draft protocol specs.

Includes server instructions and tool definitions for Claude:
claude mcp add --transport http sub_5sjach1z https://onesimpleapi.com/mcp

Run in terminal to register server in current project or pass --scope user for global availability.

Configures server instructions and tools for OpenAI Codex & ChatGPT Desktop:
[mcp_servers.sub_5sjach1z] url = "https://onesimpleapi.com/mcp"

Applies to ChatGPT Desktop app, Codex CLI, and IDE extension across your Codex host.

Add to Cursor project settings (.cursor/mcp.json) or Cursor Settings > Features > MCP:
{ "mcpServers": { "sub_5sjach1z": { "type": "http", "url": "https://onesimpleapi.com/mcp" } } }

Commit to version control to allow teammates to connect immediately.

Install as an autonomous Agent Skill using the standard skills CLI:
npx skills add https://onesimpleapi.com

Standard agent skill installer compatible with Claude Code, Cursor, and agy harnesses.

Server Guidance & Instructions OpenAI & Claude Spec Compliant
OneSimpleAPI: Execute utility API tools for web screenshots, QR codes, image processing, PDF creation and signing, email verification, and currency exchange rates over Streamable HTTP using OAuth or an API key.

Codex and Claude read this instruction prompt during initialization to orchestrate cross-tool workflows and rate limits.

Top Core Functions
01 Capture website screenshots and QR codes
02 Edit images and sign PDF documents
03 Validate email addresses and convert currencies