Add Rosud to x402 Ecosystem as Facilitator

[kavin-kim-creator]

Facilitator Listing Request

Service Name

Rosud

Website

https://rosud.com

Facilitator Endpoints

• POST https://api.rosud.com/v1/x402/verify — EIP-3009 payload verification
• POST https://api.rosud.com/v1/x402/settle — On-chain USDC settlement via Circle

Supported Networks

• Base (mainnet)
• Base Sepolia (testnet)

Description

Rosud is an AI agent payment infrastructure API that implements the x402 Facilitator role. It abstracts Circle Programmable Wallets + EIP-3009 signature verification into a simple REST API, enabling AI agents to make USDC micropayments without managing blockchain infrastructure directly.

Key features:

• EIP-3009 transferWithAuthorization signature verification
• Circle API-based USDC settlement on Base
• 0.1% fee, no minimum
• Idempotency key support (nonce-based replay prevention)
• Full payment audit trail via REST API

GitHub

https://github.com/kavin-kim-creator/rosud (private, open-source release planned)

Contact

Kavin Kim — admin@sandingzone.com

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This is a request to be listed in the x402 ecosystem directory at https://www.x402.org/ecosystem

[ruhil6789]

hey @kavin-kim-creator , can i work on this to add Rosud as Facilitator to the ecosystem.

[kavin-kim-creator]

Hey @ruhil6789! Thanks for the interest 🙌

We just shipped the facilitator endpoints — they're live now:

• POST https://api.rosud.com/v1/x402/verify — EIP-3009 signature verification
• POST https://api.rosud.com/v1/x402/settle — USDC settlement via Circle on Base

Would love to collaborate on the ecosystem listing PR together. Feel free to ping me here or open a draft PR — happy to review and contribute! 🤝