"Understanding HTTP Requests" matching MCP servers:

Enables any existing API to become a pay-per-call service for agents by issuing HTTP 402 payment requests and settling USDC payments via CDP, while exposing MCP tools that charge per call and support Bazaar discovery.

Enables AI agents to discover and pay for x402-gated HTTP APIs, handling 402 Payment Required flows with local signing. Supports EVM and Solana with non-custodial wallet management.

Enables AI agents to make pay-as-you-go AI inference requests through x402 with automatic Solana USDC payments, no API keys or registration, while enforcing configurable spending limits.

Enables AI agents to discover, inspect, and pay for paid HTTP and MCP services using USDC on Solana with a self-custodial wallet.

Enables AI agents to interact with a Liquid network wallet, including balance checks, transaction history, and sending L-BTC or Liquid assets. Backed by an in-process LWK wallet, requiring only a mnemonic, with both stdio and HTTP support.

Stamp, upgrade, and verify Bitcoin timestamps via AI agents using the OpenTimestamps protocol. No API keys required.

MCP server providing on-chain monitoring reads such as ENS expiry, gas prices, token unlocks, and oracle health via the FabTally Chain API. It supports stdio and streamable-http transports, is read-only and keyless, with pay-per-call tools.

Multi-language crypto news MCP server with editorial summaries, sentiment labels (BULLISH/NEUTRAL/BEARISH), and importance scores (0–100). 6 tools across 8 languages; every story credits the original publisher. Bridges stdio to the public Streamable HTTP endpoint at https://zippfeed.com/mcp/.

Lets AI agents discover, pay for, and call any HTTP API per request using USDC, with gasless nanopayments and no API keys or accounts needed.

An MCP server for USDC payments on Base, enabling AI agents to check balances, send payments, generate payment requests, and view transaction history.

Search 14,000+ x402-enabled HTTP APIs by keyword. Agents pay $0.01 USDC per search via x402 micropayments on Base mainnet — no API keys or accounts required.

An MCP wallet server that lets an AI agent hold, send, and spend USDC on Hedera, using the x402 standard for HTTP payments.

Gives AI agents a smart-contract wallet on Base (USDC) with 10 stdio tools: create wallets, send USDC payments, pay x402-protected HTTP resources, and run ERC-8183 escrow Jobs for A2A service delivery.

Provides AI agents with direct liteserver access to the TON blockchain for querying balances, account states, transactions, and contract get-methods without HTTP gateways.

Agent marketplace with human concierge. Submit service requests in natural language, get quoted in sats, pay via Lightning Network. 3 MCP tools: submit_request, check_status, list_services.

Enables AI agents to fundraise for projects on the Base chain using milestone-based escrow management. It allows agents to create proposals, track funding progress, and generate payment release requests upon completing work.

A local MCP server for handling X402 payment-protected HTTP endpoints, offering tools for order placement, signing, and payment submission with multiple signing modes and blockchain networks.

Provides free Polymarket discovery data alongside paid deep-market intelligence tools via live x402 HTTP handshakes on Base mainnet. It allows AI agents to securely settle real, ultra-low-cost USDC micro-payments (0.05 USDC) directly over the Model Context Protocol.

Enables agents to autonomously pay x402 API requests in USDG on Robinhood Chain while enforcing budget caps and scoped sessions.

TRON Energy & Bandwidth marketplace for AI agents — 27 MCP tools for buying/selling resources, DEX swaps, and automated energy management via Streamable HTTP.