"Techniques to Improve Agent Programming" matching MCP servers:

An MCP server that lets your AI coding agent (Claude Code, OpenClaw, Codex, Cursor, etc.) discover and pay on-chain agents registered on ERC-8004, using Coinbase's official x402 protocol. No smart account. No bundler. No relay. Just your EOA, an HTTPS request, and an automatic 402 → sign → retry flow.

The MCP gateway that lets any AI agent discover and pay metered APIs on Base or Solana — without the user wiring payments themselves.

MCP services for agent security preflight, source scanning, injection screening, proof-of-work policy rehearsal, carbon accounting, climate disclosure and regulatory monitoring. Use each hosted endpoint in the README. Inspect a free quote before buyer-authorized x402/USDC payment. Includes free trust and settlement tools. Maxwell rehearsal does not activate runtime protection.

Enables AI agents to discover, price, and purchase SaaS products, developer tools, and MCP servers with live Stripe checkout, affiliate program, and AgentTrust verification.

Enables an Alexa+-style voice agent to watch recurring payments and propose renew/deactivate/cancel recommendations without ever being able to move money itself.

Enables external AI agents to search a PayPal sandbox storefront, create and track orders, request refunds, and open disputes within buyer-set spending mandates, while every charge still requires buyer approval in PayPal.

Enables AI agents to perform free KushBitx token previews, advisory SpendGuard policy evaluations, and discovery of unsigned x402 payment challenges through three MCP tools, with no signing or payment execution.

Foundational MCP/A2A-native core platform for secure credential injection, native x402 micropayments, and Agent-to-Agent routing.

Enables AI agents to discover, call, and pay for existing HTTP APIs over MCP with x402 paywalls, non-custodial settlement, and no code changes to the backend.

Enables agents to generate, track, and manage invoices via MCP tools, with CLI support for payment tracking and earnings summaries.

Enables AI agents to preview Base token market data, evaluate SpendGuard spending policies, and read x402 payment challenge terms without signing or paying.

Per-agent quota meter for the A2A network, enabling quota checks with USDC settlement on Base L2 via x402 envelopes.

A Prime Agent skill that connects to Stripe's official remote MCP server to inspect and manage Stripe resources via OAuth.

Provides AI agents with a prepaid, capped payment method so they can request charges without accessing real accounts. Enforces spending limits, requires human approval for larger transactions, and supports out-of-band approvals via CLI, dashboard, or Telegram.

Enables agents to maintain sandboxed spend ledgers, enforce monthly budgets, transfer funds between agents, and generate invoices, all without real financial accounts.

A buyer-side HTTP 402 runtime and agent-commerce surface inspector for autonomous agents, enabling inspection of paid-action surfaces and execution of payment loops.

MCP server that lets AI agents create reviewable physical mail drafts, validate quotes, and pay for postage via MPP or x402 protocols.

Service name: Scrape Agent Service base URL: https://scrapeagent.xyz Website URL: https://scrapeagent.xyz Email: your email Category: Data Description: Pay-per-use web scraping API built on x402. Extract clean text, links or HTML from any URL for $0.01 USDC on Base. No API key, no subscription needed. Perfect for AI agents that need web data on demand. Endpoint paths: /api/scrape/x402

Enables an AI agent to act as a merchant, selling catalog items and issuing USDC invoices with cross-chain payment support via Arcorapay.

Enables keyless interaction with KushBitx token-risk APIs: free token previews, advisory SpendGuard policy evaluations, and discovery of unsigned x402 payment challenges, without requiring LLM keys, wallets, or payments.