All servers · Agent payments (x402) · Payments & accounting

x402 Micropayments MCP

io.github.kwizzlesurp10-ctrl/x402-mcp · v1.30.0

Measured by MCP Station

Description written by the publisher, not verified

Pay-per-call US city property compliance and Base tx checks, paid in USDC on Base via x402.

Connect

claude mcp add --transport http x402-mcp https://x402-mcp.onrender.com/mcp/mcp

{
  "mcpServers": {
    "x402-mcp": {
      "url": "https://x402-mcp.onrender.com/mcp/mcp"
    }
  }
}

Tools as reported by the server

• x402.agent_card
  Return the A2A Protocol v1.0 Agent ID Card and MCP server card. Optional target_id filters to a skill id, name, or tag.
• x402.discover
  Discover paid HTTP APIs in the x402 Bazaar via the facilitator catalog. Call this first to find a resource URL, then x402.probe and x402.pay_and_fetch.
• x402.probe
  Probe a URL for HTTP 402 PAYMENT-REQUIRED terms using the x402 client SDK. Use before x402.pay_and_fetch to inspect price, network, and payTo without spending.
• x402.pay_and_fetch
  Pay USDC via x402 and fetch a protected HTTP resource in one call. Requires EVM_PRIVATE_KEY on this host; otherwise use x402.probe for a no-spend 402.
• x402.build_seller
  Build seller-side x402 payment requirements for your own HTTP resource. Pass resource_url plus discovery_* fields to catalog the endpoint in Bazaar.
• x402.verify
  Verify an x402 PAYMENT-SIGNATURE against PAYMENT-REQUIRED terms via the facilitator. Call after a buyer presents a signature and before releasing paid content.
• x402.networks
  List supported settlement networks, facilitators, and x402 v2 header names. Call when choosing a preferred_network for x402.pay_and_fetch or x402.build_seller.
• commerce.pro_requirements
  Build x402 payment requirements to purchase the Pro quota tier. Next: pay those terms, then commerce.activate_pro with the signature.
• commerce.activate_pro
  Verify a Pro-tier x402 payment and unlock Pro quota limits for the agent. MCP-native: call without payment to receive x402 requirements in the tool result, then retry with _meta['x402/payment'] (@x402/mcp client). Legacy: pass PAYMENT-SIGNATURE + PAYMENT-REQUIRED after commerce.pro_requirements.
• commerce.credits_requirements
  Build x402 payment requirements to buy a pack of per-use MCP tool credits. Next: pay those terms, then commerce.purchase_credits with the signature.
• commerce.purchase_credits
  Verify an x402 payment and add per-use tool credits to the agent. MCP-native: call without payment for x402 requirements, then retry with _meta['x402/payment']. Legacy: PAYMENT-SIGNATURE + PAYMENT-REQUIRED after commerce.credits_requirements.
• swarm.research
  Run the swarm agency: compose a research product from free inputs and list it for resale. Pass allow_paid_inputs=true only when buying upstream x402 services is intended.
• swarm.settle
  Verify and settle a buyer's x402 payment for a listed composite product and record revenue. Call with product_id plus PAYMENT-SIGNATURE after the buyer pays.
• swarm.revenue
  Get swarm composite economics: spend, composite sales, LTV:CAC, margins, per-source scores. total_revenue_usdc is swarm listings only; storefront.revenue_usdc is the full settled ledger. Call after swarm.research or swarm.settle to inspect realized economics.
• pulse.base
  Get live Base Network Pulse: base fee, EIP-1559 projection, utilization, USD settlement cost, verdict. Call before settling on Base when you need a settle-now vs hold recommendation.
• ops.metrics
  Get host OS telemetry: CPU, memory, swap, disk, network, and an ok/warn/critical health verdict. Call to diagnose this MCP host; set include_processes=true for top memory processes.
• city.list
  List US City Open-Data Compliance Network cities with paid_url, sample_url, and price. Call first, then city.sample, then city.check for the paid address lookup.
• city.sample
  Get a free fixed-address property compliance sample for one US city code. Use before city.check to validate city_code and response shape without paying.
• city.check
  Paid US city property compliance check (MCP seller x402). Unpaid calls return PaymentRequired with accepts; pay via _meta['x402/payment']. Prefer city.sample first. Price: $0.01 per call (x402, USDC on Base/Solana/Arbitrum).
• a2a.resolve_card
  Discover and inspect an external Agent-to-Agent (A2A) node by domain or URL. Fetches .well-known/agent-card.json, validates protocol compatibility, checks for a2a-x402 and AP2 payment extensions, and extracts callable skills with pricing.

Tool changes

• 2026-10-19: x402.agent_card, x402.discover, x402.probe, x402.pay_and_fetch, x402.build_seller, x402.verify, x402.networks, commerce.pro_requirements, commerce.activate_pro, commerce.credits_requirements, commerce.purchase_credits, swarm.research
• 2026-10-18: x402.agent_card, x402.discover, x402.probe, x402.pay_and_fetch, x402.build_seller, x402.verify, x402.networks, commerce.pro_requirements, commerce.activate_pro, commerce.credits_requirements, commerce.purchase_credits, swarm.research
• 2026-10-16: x402.agent_card, x402.discover, x402.probe, x402.pay_and_fetch, x402.build_seller, x402.verify, x402.networks, commerce.pro_requirements, commerce.activate_pro, commerce.credits_requirements, commerce.purchase_credits, swarm.research

Repository · Website · JSON · Text for agents · Registry updated 2026-10-17