"Understanding Call Hierarchy in Software Development or Programming" matching MCP servers:

Provides tools and prompts for Trezoa blockchain development, including RPC methods for querying account balances, transaction data, and account information on the Trezoa network.

9 tools, Lightning-gated. Pay per call. For agents that need verifiable signed actions with an audit trail. Nostr event signing via daemon Publish events to relays Create Lightning invoices Action receipts — signed proof of agent actions Identity attestation

The CSPR.trade MCP server provides AI Agents with 14 tools for interacting with the CSPR.trade decentralized exchange on the Casper Network.

Enables an autonomous agent wallet on Base to make payments, approve tokens, swap on Uniswap V3, Aerodrome, 0x and CoW Protocol, lend/borrow via Aave V3 and Morpho Blue, trade perps on Hyperliquid, and enforce risk policies via blacklists, caps, simulation, and audit logs.

Enables AI-powered cryptocurrency trading and analytics across multiple exchanges and blockchains, with integrated Telegram bot and live trading capabilities.

Pay-per-call data and tools for AI agents over x402, by UnyKorn. 360 endpoints: DeFi and market data, multi-chain wallet reads, wallet and token risk signals, SEC filings, web and domain intel, and AI text tools. Settled per call in USDC on Base ($0.001-$0.25). No API keys or subscriptions; unpaid calls return the exact quote first.

MCP server for the CortexCloud API, enabling pay-per-call AI generation, web search, market data, and blockchain RPC endpoints via the x402 protocol, billed in USDC on Base without API keys or subscriptions.

Pay-per-call x402 data products on Base mainnet — sanctions screening, aviation weather, mortgage rates, US property dossier, title chain, wallet balance, and agent session auth. Every call settles in USDC with an on-chain receipt, no accounts or API keys.

An MCP server that mints STAS, DSTAS, and BSV-21 tokens into a BSV Desktop wallet in seconds, enabling rapid token testing and development.

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.

A Model Context Protocol server that gives any MCP client two economic-safety tools: realizable quote and pretrade check, paid per call in USDC with no accounts.

MCP server that gives autonomous agents pay-per-call Bitcoin context (self-custody radar, fee percentiles, price change windows, condition frequencies) paid in sats over Lightning via L402 invoices, with no account or API key required.

Enables AI agents to access crypto/web3 data across 5 chains with pay-per-call billing in USDC via x402, no API key required, and built-in spend caps.

Provides AI agents with real-time Solana data and agent-swarm intelligence as tools, with auto-paid per-call micropayments in CIRC via x402.

Pay per MCP tool call in USDC on Base. Non-custodial settlement, no admin keys, 30 bps fee.

Provides prediction-market data as MCP tools, including live prices, keyword search, probability history, volume spikes, arbitrage gaps, and resolutions. Pay per call in USDC on Base with no API key or signup.

MCP server for verifying blockchain safety on Base via x402, with free pricing/receipt tools and paid per-call guard, contract, and metadata checks settled in USDC.

Enables AI agents to detect and verify the language of texts, run bundle checks, and top up prepaid credits by paying per call in USDC on Solana, with no account, API key, or subscription needed. Payment is handled transparently via x402 challenges, prepaid credit tokens, or a funded payer wallet with sponsored gas.

Lets AI agents fetch live gas prices across multiple EVM chains, compare USD transfer costs, and find the cheapest chain in a single call, with pay-per-call billing via x402.

Enables AI agents to pay per call for AI compute in Kaspa (KAS) over HTTP 402, with no account, API key, or human in the loop, settling each request on-chain.