tollbooth-mcp is an open-source MCP server that demonstrates agent pay-per-call workflows for AI systems. It supports 402 challenge, payment, and signed receipts in a simulated environment. Designed for AI developers exploring monetization and agent protocol integration.
In the Frameworks & runtimes space, tollbooth-mcp takes a focused approach. Demonstrates agent pay-per-call workflows for AI developers using the Model Context Protocol. It is built as an open-source project for AI developers. tollbooth-mcp is open source under the MIT license. It runs on the command line.
Behind tollbooth-mcp is roblambert9, and it first shipped in 2026. Development happens publicly on GitHub with 15 commits in the last 90 days. Among its 5 catalogued features are MCP server, pay-per-call demo, and 402 challenge. It exposes integrations via an MCP server.
Summary written by a language model from the project’s public pages.
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