x402-gateway-mcp
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- AlicenseNot gradedqualityCmaintenanceEnables MCP clients to call pay-per-use tools for search, PDF processing, web reading, extraction, summarization, fact-checking, translation, jobs, and discovery, with each call paid in USDC on Base via x402 and no API key or account required.AGPL 3.0

halowerk-mcpofficial
AlicenseAqualityFmaintenanceProvides access to 70 paid APIs as MCP tools with per-call and session budgets, paying via x402/USDC on Base without requiring an account or login. Includes a built-in allowlist of hosts and safe defaults to prevent unintended payments.1472 npmMIT
fabler-x402-toolsofficial
AlicenseNot gradedqualityCmaintenanceEnables MCP clients to use paid tools for secret scanning, agent-config auditing, and OG image rendering, with payments handled over the x402 protocol on Base.MIT- FlicenseNot gradedqualityCmaintenanceEnables AI agents to access 11 paid x402 endpoints as standard MCP tools, paying per call in USDC on Base without API keys, covering chat, code, vision, embeddings, crypto prices, weather, geolocation, forex, and WHOIS data.-
- AlicenseNot gradedqualityCmaintenanceEnables MCP hosts to invoke pay-per-call wallet, risk, web, repo, and x402 catalog utilities while automatically handling 402 challenges, EIP-3009 USDC payments on Base, and spend guards with a local agent wallet.MIT
- AlicenseNot gradedqualityBmaintenanceEnables AI agents to discover, call, and pay for existing HTTP APIs over MCP with x402 paywalls, non-custodial settlement, and no code changes to the backend.436 npm62Apache 2.0
TDQS
Scored across 23 tools
Each tool targets a distinct domain or operation. For example, crypto_gas vs. crypto_price vs. defi_tvl are clearly different; dev_npm and dev_pypi differ by ecosystem; v1_preflight, v1_endpoint_scorecard, and v1_run serve unique purposes. No two tools have overlapping functionality.
Most tools follow a descriptive pattern (domain_verb or domain_noun) like crypto_price, defi_tvl, web_extract. The v1_* and x402_market_pulse tools use a different prefix but are consistent within their group. Overall, naming is mostly predictable with minor deviations.
23 tools is well-scoped for a multi-purpose gateway. The count covers a wide range of data and utility services without being overwhelming or insufficient. Each tool serves a clear purpose and earns its place.
The tool surface covers diverse domains (crypto, DeFi, packages, domains, weather, etc.) with good depth. Minor gaps exist, such as lack of historical price data for crypto or a token transfer tool, but these are not critical for the gateway's stated purpose. Overall, the set is reasonably complete.