Top 8 Python x402 Projects
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red-team-blue-team-agent-fabric
AI agent security harness for adversarial testing: 603 executable tests across MCP, A2A, x402/L402, decision governance, benchmark integrity, human-in-the-loop, skill supply chain. Commit-pinned OWASP Agentic v1.1 T1-T17 coverage (13 direct, 4 partial, 0 not evidenced), AIUC-1 2026-Q1/Q2 crosswalk 19/20 testable, NIST AI 800-2 aligned. v4.13.1
Project mention: 98% of Agents Carry the Lethal Trifecta. Last Week Showed Why. | dev.to | 2026-06-06The agent-security-harness community plugin runtime and MCP server modules exercise the equivalent of preinstall-hook code paths inside MCP plugin loading: untrusted YAML, eval-injection patterns, file size caps, regex safety, delay caps. The community runner's plugin validator is the closest defensive analog the harness contains to what Miasma exploited at the npm layer.
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SaaSHub
SaaSHub - Software Alternatives and Reviews. SaaSHub helps you find the best software and product alternatives
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ag402
Zero latency! Zero code change! Empower your AI agent with payment ability via x402 protocol! (Openclaw, Claude code, Cursor, Langchain, CrewAI, AutoGen...)
Coinbase's x402 protocol solves this. Like HTTP 401 means "authenticate," 402 means "pay." The server publishes payment terms, the client pays automatically. I found ag402, a Python SDK that implements x402 on Solana. Setup:
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x402-discovery-mcp
MCP server for x402 Service Discovery — continuously growing catalog of services, real-time quality signals, facilitator-compat checks. For Claude, Cursor, Windsurf.
Project mention: How to Connect Claude to x402 APIs with MCP — No API Keys Required | dev.to | 2026-03-04x402 Service Discovery MCP solves this for the emerging class of x402-payable APIs — services that implement the Coinbase x402 micropayment protocol, accepting USDC on Base as direct payment instead of API keys.
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rug-munch-mcp
MCP server for Marcus Rug Intel — 19 tools for crypto token risk analysis, rug pull detection, and AI forensics. Works with Claude Desktop, Cursor, Windsurf.
Project mention: Your AI Agent Is One Rug Pull Away from Losing Everything: Here's the Fix | dev.to | 2026-02-25GitHub: CryptoRugMunch/rug-munch-mcp
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app-generation-microservice
Generate a compiling Flutter app from a JSON spec — free preview of the real generated source, pay $3 USDC (x402 on Base) only for the compiled APK. Remote MCP server, nothing to install.
Project mention: Riverpod's two build() signatures bit my Flutter code generator | dev.to | 2026-08-03Source: https://github.com/carlosge492/app-generation-microservice (MIT)
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project_x402
A paid JSON Schema validation API using x402 USDC micropayments. Free trial endpoint available.
Project mention: A paid JSON Schema validation API using x402 micropayments | news.ycombinator.com | 2026-05-11 -
lucy-agent
AI agent for writing, research, code, DeFi & blockchain. Pay per task in USDC on Base or Solana. A2A + MCP + x402 protocols.
Project mention: Lucy – pay-per-task AI agent in USDC, no subscription (A2A/MCP/x402) | news.ycombinator.com | 2026-05-22 -
apiforchads-mcp
MCP server for AI agents — real-time crypto prices, Polymarket CLOB, AI research & JS web rendering. Pay per request via x402 Solana micropayments.
Project mention: Building x402 APIs from Scratch: How I Made AI Agents Pay for Data | dev.to | 2026-02-23GitHub
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Index
What are some of the best open-source x402 projects in Python? This list will help you:
| # | Project | Stars |
|---|---|---|
| 1 | red-team-blue-team-agent-fabric | 24 |
| 2 | ag402 | 9 |
| 3 | x402-discovery-mcp | 4 |
| 4 | rug-munch-mcp | 1 |
| 5 | app-generation-microservice | 0 |
| 6 | project_x402 | 0 |
| 7 | lucy-agent | 0 |
| 8 | apiforchads-mcp | 0 |
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