Instant USDC Payments for
Three-click monetization for API providers — friction-free USDC payments for agent builders.
What is Fluxel?
Fluxel is an HTTP 402 gateway enabling developers, companies, and AI agents to buy or sell APIs with instant USDC settlement on Base L2.
- No keys, no invoices — a single USDC transfer pays and authorises the request in one round-trip.
- Agent-first UX — ERC-4337 smart-wallets via Privy remove gas prompts and seed phrases for autonomous agents.
Challenges We Solve
Manual API Keys & Billing
Problem: Developers must issue keys, track usage, and send invoices by hand.
Solution: Fluxel issues on-chain receipts and auto-settles per call—no keys, no invoices.
Slow & Irreversible Latency
Problem: Fiat payments add days of delay and charge-back risk.
Solution: USDC on Base finalizes in one block (~2 sec) with zero charge-backs.
Wallet UX Friction
Problem: End-users hate seed phrases and gas prompts.
Solution: Privy smart-wallets (ERC-4337) create a gas-abstracted wallet in one click.
Hidden Revenue Leakage
Problem: Middlemen take variable, unpredictable percentages.
Solution: Flat 0.15 USDC facilitator fee—transparent and fixed.
Key Features
Header-Only Payments
HTTP 402 + X-PAYMENT header — settle in one round-trip, no API keys
One-click MCP Auto-Convert
Upload Swagger / Postman JSON, get an MCP manifest & live proxy instantly
Smart-Wallet Ready
ERC-4337 wallets via Privy for gas-abstracted UX
Agent-Ready SDK
Type-safe helpers & built-in 4337 logic for autonomous agents
Pricing
Consumers pay the provider-defined price plus a flat 0.15 USDC fee.
Provider price
1.00 USDC
Total charged
1.15 USDC
(includes 0.15 USDC fee)
FAQ
What currency do I pay?
Base USDC only.
Who pays gas?
Users cover the Base ETH gas; the facilitator just verifies the fee.
How much is the fee?
Flat 0.15 USDC per call. No percentage mark-up.
Can I get a refund?
Payments are final. Please use the sandbox for testing.