Mahshar: Discover APIs with MCP. Pay per call in USDC.

Hi Product Hunt! I’m introducing Mahshar, an API marketplace for developers and AI agents.

Agents can discover APIs through MCP, inspect what a listing accepts, and pay for execution with USDC via x402 on Arc Mainnet. Providers can list existing APIs and set a price per call while keeping upstream credentials on the server, out of buyer responses.

Discovery is free. API execution may require payment, and prices vary by listing. Mahshar also offers optional, read-only ERC-8004 identity lookup. It checks on-chain registry records; it does not authenticate the caller or grant access.

Development has included scripted Production tests of paid MCP calls and purchase-scoped response recovery across several upstream authentication methods.

You can explore the marketplace at https://mahshar.xyz/marketplace and find the code at https://github.com/sharken3948/Mahshar.

I’d love to hear which APIs you need in your agent workflows and where discovery or integration could be clearer.

Hi Product Hunt! I’m introducing Mahshar, an API marketplace for developers and AI agents.

Development has included scripted Production tests of paid MCP calls and purchase-scoped response recovery across several upstream authentication methods.

You can explore the marketplace at https://mahshar.xyz/marketplace and find the code at https://github.com/sharken3948/Mahshar.

I’d love to hear which APIs you need in your agent workflows and where discovery or integration could be clearer.