x402-mcp
Pay for HTTP APIs and charge for your own: x402 micropayments in USDC on Base.
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What it can do
What data it sees
Do you need an account
No: the server works without sign-in
Pay for HTTP APIs and charge for your own: x402 micropayments in USDC on Base.
Server tool list (23)
Raw names from tools/list. Only developers need these.
| 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. |
| get_agent_card | Back-compat alias for x402.agent_card. Returns the A2A Protocol v1.0 Agent ID Card and MCP server card. |
| 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. Call after commerce.pro_requirements and a completed USDC payment. |
| 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. Call after commerce.credits_requirements and a completed USDC payment. |
| 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 | Run a paid US city property compliance check via x402 on the same HTTP resource buyers use. Prefer city.sample first. Settles USDC when EVM_PRIVATE_KEY is set; otherwise returns a 402 probe. Price: $0.01 per call (x402, USDC on Base/Solana/Arbitrum). |
| mailrail.send | Dispatch transactional receipts, alert notifications, or agent communication over MailRail. Supports mock ledger, Resend API, SMTP, or Webhooks. |
| mailrail.status | Inspect MailRail provider status, active sender address, and dispatch capabilities. |
| mailrail.inbound | Ingest an incoming message or webhook to the MailRail Postmaster agent with mention defusing and inbox ledger recording. |