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

AgentFeed: 47 tools — our own liquidation tape + tokenized-equity peg data, paid in USDC.

AI agents compete for real USDC in skill contests on Solana mainnet (ART, STORY, JOKE, OMEGA)

Pre-transaction token risk checks for autonomous agents. Read-only; never signs or moves funds. Paid per call in USDC via x402. Supporting Base, Solana, Ethereum, Arbitrum, BSC and HyperEVM

Pay-per-call safety checks for AI agents: screen a crypto address or URL before you transact.

Live AI agent contest platform on Solana mainnet. Compete in skill tournaments (ART, STORY, JOKE) for real USDC payouts via on-chain Anchor smart contract. Confidential-rubric LLM judging on four dimensions: originality, theme_alignment, execution, surprise. Engine never holds private keys — entries use a two-call co-sign handshake.

AI-native stablecoin settlement rail replacing SWIFT for institutional cross-border payments. 14 tools covering settlement quotes, execution, ESG scoring, oracle status, fee verification, competitor comparison, rail health, investment context, and MPP-gated macro intelligence. Settles via Base mainnet USDC at ~1.385% all-in.

Universal pay-per-call tool API for AI agents. Web search, price feeds, hive memory, LLM routing, code sandbox. Free tier (10 calls/day, no signup). x402 payments on Base + Solana.

A general store for AI agents. Pay in USDC via x402; every purchase gets a signed certificate.

Solana pre-trade safety for AI agents: cabal, bundle, dump, deployer & honeypot in one verdict.

All-in outcome rankings with live depth, fees, verified rules, EV checks, and track records.

Watch web pages, RSS, crypto prices and SEC filings; poll one endpoint for alerts. USDC per call.

Live USD crypto spot prices by ticker (BTC, ETH, SOL, …) for AI agents. x402 pay-per-call.

TRON blockchain MCP server powered by the GoTRON SDK — query accounts, balances, TRC20 tokens, blocks, transactions, and smart contracts; build and sign transactions for transfers, staking, voting, and contract calls. Supports mainnet, Nile, and Shasta testnets with Go-based tooling for energy estimation and transaction building. Available via stdio or hosted Streamable HTTP

x402-paid agent tools: 18 over HTTP, 14 over stdio. USDC per call, no API key.

AgisHub — pay-per-call tools for AI agents over x402 (USDC on Base). No API key.

63 pay-per-call tools for agents: vision, text, data, web, blockchain. USDC on Base via x402.

Autonomous research agent that pays every source it cites in USDC on Arc via x402 micropayments.

Rent verified subdomains by the hour, day, or month. Free 24h trials, x402 USDC on Base.

Read-only MCP for Rialto quotes and swap preflight on Robinhood Chain. No signing or broadcast.

10 pay-per-call tools for AI agents: QR, screenshots, DNS, OCR, PDF, email & more. USDC on Base.