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x402 Logo
  • Product
    • Core Products
      • Smart Proxy
        Financial guardrails for autonomous agents
      • Paywall Service
        Turn your agents into revenue streams
      • Observability
        Complete visibility into agent operations
      • Monetize MCP Server
        Monetize any MCP server in 2 minutes
    • Monetize Your Workflows
      • n8n
        Monetize n8n workflows
      • Activepieces
        Monetize Activepieces flows
      • Zapier
        Monetize Zapier Zaps
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        View all supported platforms
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        Core SDK packages for AI agents
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        Open source repositories
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        Blockchain networks supporting x402
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This is an info Alert.
x402 Logo
  • Product
    • Core Products
      • Smart Proxy
        Financial guardrails for autonomous agents
      • Paywall Service
        Turn your agents into revenue streams
      • Observability
        Complete visibility into agent operations
      • Monetize MCP Server
        Monetize any MCP server in 2 minutes
    • Monetize Your Workflows
      • n8n
        Monetize n8n workflows
      • Activepieces
        Monetize Activepieces flows
      • Zapier
        Monetize Zapier Zaps
      • All Platforms
        View all supported platforms
  • Resources
    • xpay Ecosystem
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        1,000+ pay-per-use tools for your AI agents
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        Core SDK packages for AI agents
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        Open source repositories
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        Blockchain networks supporting x402
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  7. eFunda: The Ultimate Online Reference for Engineers

eFunda: The Ultimate Online Reference for Engineers logo

eFunda: The Ultimate Online Reference for Engineers

efunda.com

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🇺🇸 US
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Traffic: Top 100K
eFunda, the ultimate online reference for the mechanical engineering community
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License via xpay

Pricing on request
This includes:

Licensed AI agent access

MCP server + REST API

Pay per query, no subscription

Single account, instant integration

Compliant licensing & receipts

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© 2025 Agentically Inc. All rights reserved.
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x402 Logo

We're building essential tools that sit between AI agents and autonomous payments, ensuring agents never overspend while enabling instant API monetization.

or ask your AI app
Company
About xpayGitHubDiscordllms.txt
Developers
DocumentationAPI ReferenceSDKs & LibrariesQuickstart GuideOpenAPI Spec
Stay Updated
Subscribe to receive the latest xpay updates and agent payment control guides.
Social
  • Agentic Economy
    • Timeline
    • Protocols
  • x402 Facilitators
    • Overview
    • xpay
    • CDP Facilitator
    • Corbits
    • Mogami
    • thirdweb
    • PayAI
    • Meridian
    • x402.org
  • x402 APIs & Services
    • Overview
    • Firecrawl
    • Neynar
    • Pinata
    • Hyperbolic
    • Zyte API
    • Gloria AI
    • Bonsai
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    • AutoGPT
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    • @coinbase/x402
    • x402-python
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    • go-x402
    • mogami-x402
    • php-x402
  • x402 Networks
    • Overview
    • Base
    • Polygon
    • Ethereum
    • Arbitrum
    • Optimism
    • BNB Chain
  • x402 Use Cases
    • Overview
    • API Monetization
    • Agent Spending Controls
    • Content Monetization
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    • Coinbase
    • Circle
    • Anthropic
    • OpenAI
© 2025 Agentically Inc. All rights reserved.
Privacy PolicyTerms of ServiceAcceptable Use Policy
x402 Logo

We're building essential tools that sit between AI agents and autonomous payments, ensuring agents never overspend while enabling instant API monetization.

or ask your AI app
Company
About xpayGitHubDiscordllms.txt
Developers
DocumentationAPI ReferenceSDKs & LibrariesQuickstart GuideOpenAPI Spec
Stay Updated
Subscribe to receive the latest xpay updates and agent payment control guides.
Social
  • Agentic Economy
    • Timeline
    • Protocols
  • x402 Facilitators
    • Overview
    • xpay
    • CDP Facilitator
    • Corbits
    • Mogami
    • thirdweb
    • PayAI
    • Meridian
    • x402.org
  • x402 APIs & Services
    • Overview
    • Firecrawl
    • Neynar
    • Pinata
    • Hyperbolic
    • Zyte API
    • Gloria AI
    • Bonsai
  • Agent Frameworks
    • Overview
    • LangChain
    • AutoGPT
    • Claude MCP
    • CrewAI
    • Autogen
    • OpenAI Assistants
  • x402 SDKs & Libraries
    • Overview
    • @coinbase/x402
    • x402-python
    • x402-rs
    • go-x402
    • mogami-x402
    • php-x402
  • x402 Networks
    • Overview
    • Base
    • Polygon
    • Ethereum
    • Arbitrum
    • Optimism
    • BNB Chain
  • x402 Use Cases
    • Overview
    • API Monetization
    • Agent Spending Controls
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    • x402 vs Unlock Protocol
  • x402 Companies
    • Overview
    • Coinbase
    • Circle
    • Anthropic
    • OpenAI
© 2025 Agentically Inc. All rights reserved.
Privacy PolicyTerms of ServiceAcceptable Use Policy