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

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.

Search and license 5,000+ fully cleared music tracks via MCP. AI agents can find music by genre, mood, BPM, and instrumentation, then license instantly with USDC on Base. No human in the loop. Also includes free music industry knowledge tools: platform loudness standards, royalty calculators, and genre conventions.

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.

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

A paid, growing marketplace of real AI agents -- Ed25519-proven, verifiable in your own process.

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.

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

Reputation-ranked analyst earnings estimates. Pay per call via x402 on Base.

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.

Self-routing market intel for agents: A-F trade checks, one-call briefs, real liq maps, proof board.

8 pay-per-call web intel tools over MCP. Free discovery, calls settle in USDC on Base (x402).

Find the cheapest EVM chain across up to 9 networks with savings %. Pay-per-call via x402 on Base.

Pay-per-call data & AI gateway: 153 x402 endpoints + AI chat/image/deep. USDC on Base.

Conformal TCG risk forecasts + AI card grading, x402 pay-per-call oracle, on-chain soul agents.

Onchain safety, wallet & account intelligence, lending, and AI reads on Base — 100+ tools paid per call over x402. Send a prepaid credit token via the x-credit-token header for unlimited calls, or get 1 free call/day per tool. No wallet or API key required.