x402 + AI Agents: Pay-Per-Call APIs Without Signup or API Keys
DevForgeWhat is x402?
x402 is a protocol that lets AI agents pay for API calls using USDC cryptocurrency. When an agent hits a paid endpoint, it receives an HTTP 402 response with payment instructions, sends a microtransaction on the Base blockchain, and retries with proof of payment.
No signup. No API keys. No subscription. Just pay-per-call.
Why This Matters
Traditional APIs require: 1) Create account, 2) Generate API key, 3) Set up billing, 4) Configure rate limits. With x402, an AI agent can discover and use any API instantly — the wallet IS the credential.
Try It Right Now
DevForge offers 10 x402-enabled endpoints:
- Web scraping: $0.001/call
- Data extraction: $0.002/call
- Text analysis: $0.002/call
- Search: $0.003/call
- Batch processing: $0.005/call
Check pricing: curl http://69.62.106.38:3100/x402/pricing
Discovery: curl http://69.62.106.38:3100/.well-known/x402.json
Free Tools Too
Not everything costs money. DevForge has 18 completely free endpoints:
curl http://69.62.106.38:3100/ip
curl http://69.62.106.38:3100/uuid
curl http://69.62.106.38:3100/dns/example.com
curl http://69.62.106.38:3100/timestamp
MCP Server: 25 Free Tools for AI Assistants
Connect in one command:
claude mcp add devforge --transport streamable-http http://69.62.106.38:3109/mcp
Works with Claude Code, Cursor, Windsurf, or any MCP-compatible client.