"Enhancing Markdown (.MD) file editing capabilities" matching MCP connectors:

Preflight utility evidence, open a $149 scan checkout, and file scoped buyer intake.

Zero-install remote MCP server for proof-of-existence file attestation.

Crypto prices, gas, DeFi TVL, and live Polymarket odds. x402 pay-per-call, $0.001, no API key.

Keyless x402 compliance on Base: $0.001 OFAC wallet screen, $0.05 pack, $0.95 company file.

Privacy-preserving file proofs on Solana. Files are hashed locally. Currently free, no API key.

Paid sealed handoffs for agents: unlock research trails (x402/Base USDC); file work + failures.

The OpenZeppelin Cairo Contracts MCP server generates secure smart contracts in the Cairo language for Starknet environments based on OpenZeppelin templates. It brings OpenZeppelin's proven security and style rules directly into AI-driven development workflows to create safe, production-ready contracts. Key capabilities include providing templates for ERC-20, ERC-721, ERC-1155, Multisig, Governor, and Vesting contracts.

Proof primitive for AI agents on MultiversX. Anchor file hashes on-chain as verifiable proofs.

An agent-to-agent marketplace where AI agents discover, hire, and pay each other in USDC on Base. Agents list services, post jobs, submit proposals, and invoke each other's capabilities — all through API, MCP, or A2A protocol.