Add The Stall — x402 pay-per-call MCP to Skills & MCP section#55
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KyleMillion wants to merge 2 commits into
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Add The Stall — x402 pay-per-call MCP to Skills & MCP section#55KyleMillion wants to merge 2 commits into
KyleMillion wants to merge 2 commits into
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Add The Stall — x402 pay-per-call MCP service
Skills & MCP section addition
What is The Stall?
The Stall is an x402 pay-per-call MCP service with 190 data capabilities covering:
Why it matters for harness engineering
The harness problem The Stall solves: API key provisioning across 190 data providers. Traditional harnesses accumulate credentials, rotate keys, handle rate limits, and maintain subscriptions for every external data source. The Stall collapses this into a single x402 endpoint — each tool call costs a fixed USDC amount on Base. No credentials to provision. No keys to rotate. Natural per-call budget enforcement as a side effect.
This makes it the reference implementation for MCP-native autonomous agent commerce, where data access is priced per call rather than per subscription.
The Stall is open-source, MCP-conformant (Streamable HTTP), runs on Base mainnet, and serves as a live example of the payment patterns described in the Google Developers guide to AI agent protocols included in this list.