How do I fix “SYNTER_API_KEY not set”?
Ensure your API key is placed in the `env` section of your MCP config file and that the key string starts with `syn_`.
@jshorwitz
Basic information
MCP server for AI agents to manage ad campaigns across Google, Meta, LinkedIn, Microsoft, Reddit, TikTok, and more. Create campaigns, pull performance data, generate AI creatives, and optimize budgets. Also, for conversion tracking, google analytics, posthog, hubspot, salesforce.
Add this server to your MCP-compatible client using the configuration below.
{
"mcpServers": {
"synter": {
"command": "npx",
"args": [
"@syntermedia/mcp-server"
],
"env": {
"SYNTER_API_KEY": "syn_your_api_key_here"
}
}
}
}Tool list not available yet
This listing does not currently have a tool list to display. This does not mean the server has no tools; check its documentation for supported capabilities.
Fetch the live tool list by running this server in a temporary sandbox using the button above.
Synter is an MCP server that gives AI agents direct access to real advertising budgets—allowing them to create campaigns, adjust bids, pause underperformers, generate creatives, and pull performance data through natural conversation across Google, Meta, LinkedIn, Microsoft, Reddit, TikTok, and more. It is built for advertisers who want to manage paid media using natural language.
Sign up at syntermedia.ai and create an API key in Developer Settings. Add the server to your AI client’s MCP configuration (e.g., Claude Desktop, Cursor, or Amp) using the command npx @syntermedia/mcp-server and the environment variable SYNTER_API_KEY set to your key. Restart the client and start chatting with commands like “Show me all my Google Ads campaigns” or “Create a search campaign for 'project management software' with a $50/day budget.”
Ensure your API key is placed in the `env` section of your MCP config file and that the key string starts with `syn_`.
Verify you copied the full key (they are long), check its status at syntermedia.ai/developer, and confirm it has the `tools:write` scope.
You need to connect at least one ad platform. Go to syntermedia.ai/credentials, click “Connect” next to the platform (e.g., Google Ads), and complete the OAuth flow.
Restart your AI client entirely (not just refresh), check the MCP server logs for errors, and verify the config file path and JSON syntax.
Google Ads: $10/day, Meta: $5/day, LinkedIn: $25/day, Reddit: $5/day, Microsoft (Bing): $10/day, TikTok: $20/day.

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