API Tester MCP Server
A Model Context Protocol server that allows Claude to make API requests on your behalf, providing to...
Obtain an OpenAI API key
- Go to your OpenAI account dashboard (platform.openai.com) and sign in.
- Open the “API keys” (or “View API keys”) section of the dashboard.
- Click “Create new secret key” (or similar), give it a name, and copy the generated key immediately (it is shown only once).
Add the key to the FastMCP connection interface (use the “Install Now” button)
- In the FastMCP connection UI, click the “Install Now” button to open the environment-variable entry form.
- For the variable name enter: OPENAI_API_KEY
- For the value paste the API key you copied from OpenAI.
- Save/Confirm the installation so the MCP server can read the variable.
(Optional) Add a local .env for development
- In your project root create a file named
.env(copy from.env.exampleif present). - Add the line:
OPENAI_API_KEY=your_openai_api_key_here - Ensure
.envis listed in.gitignoreso the key is not committed.
- In your project root create a file named
Verify and run
- Confirm the key is set in the FastMCP connection interface.
- Start the server (e.g., run
python main.py) and test an OpenAI tool (for example, use the providedopenai_chat_completionexample) to verify the key is working.
Security reminder
- Treat the API key as a secret—do not paste it into chat or share it publicly.
- Revoke and create a new key from the OpenAI dashboard if the key is ever exposed.
Quick Start
Choose Connection Type for
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Secure by default
Encrypted connections. Secrets never stored locally.
Configuration for
Environment Variables
Please provide values for the following environment variables:
HTTP Headers
Please provide values for the following HTTP headers:
started!
The MCP server should open in . If it doesn't open automatically, please check that you have the application installed.
Copy and run this command in your terminal:
Make sure Gemini CLI is installed:
Visit Gemini CLI documentation for installation instructions.
Make sure Claude Code is installed:
Visit Claude Code documentation for installation instructions.
Installation Steps:
Configuration
Installation Failed
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