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  • A
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    MCP server that gates API calls to AI agents using proof-of-work (free) or Lightning payment (3 sats), providing challenge, verify, and status tools for per-call authentication without accounts.
    3
    44
    1
    MIT
  • A
    license
    A
    quality
    C
    maintenance
    A template for building MCP servers with a built-in paywall gate that offers free local execution and premium server-side execution via Stripe and x402 payment lanes.
    1
    MIT
  • A
    license
    A
    quality
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    maintenance
    MCP server providing Polymarket weather-market bucket-transition signals for AI agents, with free city/signal inspection tools and paid signal bundles via USDC on Base using x402.
    5
    15
    MIT
  • A
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    quality
    B
    maintenance
    Create free, no-signup invoices from your AI assistant — the create_invoice tool returns a link that opens blankinvoicemaker.com pre-filled, ready to download as a watermark-free PDF.
    2
    57
    1
    MIT
  • F
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    quality
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    maintenance
    MCP server for real FDM 3D-printing slicing, quoting, and design-for-manufacturability analysis via the FabTally API, supporting 12 printer profiles and 12 materials. Includes free discovery/printability tools and paid slice/quote/orientation tools settled via x402 (USDC on Base).
    6
  • A
    license
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    quality
    B
    maintenance
    Trust infrastructure for the machine economy. Gives AI agents non-custodial smart accounts (ERC-4337), x402 payments, on-chain reputation via ERC-8004 trust registry, and service discovery. 8 tools: create accounts, transfer, check balances, pay for x402 services, publish/discover services, manage payment agreements, and send encrypted messages.
    36
    127
    3
    MIT
  • A
    license
    A
    quality
    B
    maintenance
    Enables AI agents to discover x402 payment services and query on-chain-verified settlement volumes per facilitator through the Model Context Protocol.
    6
    195
    MIT
  • A
    license
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    quality
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    maintenance
    Payment firewall for AI agents: a signed, independently verifiable verdict on every money-moving action. Blocks wrong/lookalike payee, over-cap, and duplicate-invoice (BEC) fraud before money moves — anyone can verify a verdict against the public JWKS. Free, local-first, non-custodial.
    2
    12
    1
    Apache 2.0
  • A
    license
    A
    quality
    A
    maintenance
    A local MCP server that integrates ProofJSON to assess invoices before payment, providing allow/review/block decisions with confidence scores and verification capabilities.
    3
    MIT
  • A
    license
    A
    quality
    B
    maintenance
    AI-powered invoice automation. Create PDF invoices, predict late payment risk 0-100, auto-send reminders, reconcile Stripe/PayPal payments, track cash flow. 10 MCP tools, 4 resources.
    10
    71
    MIT
  • A
    license
    A
    quality
    C
    maintenance
    An MCP server for KG Financial's payment services integration, enabling AI coding tools to generate accurate code by automatically searching payment integration documentation through natural language queries.
    6
    50
    MIT
  • A
    license
    A
    quality
    D
    maintenance
    An MCP server that provides a standardized interface for AI assistants to interact with TropiPay's payment platform, enabling account management, transactions, beneficiary management, and payment link creation through tools and resources.
    11
    6
    1
    MIT