Frequently Asked Questions
How do I get an API key? ▼
Sign up at 50c.ai/subscribe and you'll receive your API key via email. You can also find it in your dashboard.
What happens if I run out of credits? ▼
Your API calls will return a 402 error. You can top up at 50c.ai/subscribe or upgrade your plan for more credits.
Can I use 50c tools in production? ▼
Yes! Our REST API and MCP server are production-ready. We offer enterprise plans for high-volume usage.
How do I set up MCP in Cursor? ▼
Go to Settings → Features → Model Context Protocol, then add the 50c server with your API key. See our MCP guide for detailed instructions.
What is x402 payment? ▼
x402 is a protocol for autonomous agents to pay per API call using USDC on Base. It enables keyless authentication.
How do developer slots work? ▼
Register your agent to earn 10% revenue share on every call it makes. See the Developer Slots guide for details.
Do you offer refunds? ▼
Unused credits can be refunded within 30 days of purchase. Contact support for assistance.
How do I cancel my subscription? ▼
Visit your dashboard at 50c.ai/dashboard and click "Manage Subscription" to cancel or downgrade.