"Scheduler that invokes the agent based on a predefined schedule" matching MCP servers:

MCP server that checks an x402 paid endpoint before an agent pays it, and checks afterwards that the receipt opens to exactly one real on-chain settlement. Two tools, no account, no API key.

Quote, book, and track real LTL, FTL, cargo van, and box-truck freight through the Warp network - 20 tools, in-chat login, Stripe-charged bookings, and real carrier dispatch. Quoting is keyless; booking needs a free Warp account with a card on file.

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.

Fully autonomous, crypto-monetized MCP server on the Base network. Provides premium smart contract auditing, patching, and token data arbitrage using the x402 micro-transaction protocol.

NexaLayer MCP Server — a Model Context Protocol server that lets AI agents create and manage dynamic and static proxy sessions with budget guardrails.

Universal HTTP 402 Micropayment Protocol & Autonomous Economic Settlement Engine for AI Agents on Base L2.

Free starter pack of 2 USDT agent skills (usdt-invoice-request, wallet-address-safety) plus a stdlib-only Python MCP server that checks USDT payments on-chain, for freelancers paid in crypto.

A read-only MCP server that collects contract and bank-statement evidence, splits incoming platform payments per merchant, and generates explainable claiming candidates written into a fixed 13-column local template for human review. All operations are strictly read-only (no logins, uploads, imports, or reconciliation writes), and it exposes blockers with provenance evidence instead of guessing.

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.

MCP server that verifies storefront merchants before AI agents make payments, checking if the merchant is a real legal entity bound to the domain, and returning a PROCEED, ABORT, or REVIEW decision to prevent payment to clones or fraudulent stores.

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

Connects AI agents to real-world fiat banking rails through a non-custodial Circle Agent Wallet on Arc, enabling USDC conversion into local bank or mobile money payments and wallet funding via bank transfers. It supports chat-native approvals and on-chain verification against Arc transfer receipts.

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.

Exposes four stdio MCP tools that let an AI client read sandbox disputes and unpaid invoices, draft persistent payment reminders, and execute reminders only after a human approves them in a separate terminal CLI. This lets finance teams triage PayPal issues and prepare outreach while keeping sending behind explicit human approval.

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.

Gives AI assistants a non-custodial wallet that can pay x402 endpoints and send QU on the Qubic network, but only within human-set spending caps, allowlists, and approval requests enforced in code outside the agent. Keys stay in the local OS keychain, and every payment is journaled before sending and settled from the chain afterwards.

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.

Provides trust and commerce checks for agent operators through HTTP x402 and a remote MCP endpoint, enabling clients to inspect x402 quotes, MCP handshakes, and A2A cards and to run paid verification and data tools.

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.

Enables autonomous AI agents to invoke metered upstream tool APIs through a policy firewall that enforces per-key cent-level spending caps and strict tool allowlists, blocking unauthorized or over-budget calls pre-flight. Every transaction is settled atomically and returned with an HMAC-SHA256 signed audit receipt, with instant key rotation and spread accounting built in.

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 AI coding agents to add stablecoin checkout, payment links, payment status checks, webhook verification, and webhook-based access logic to applications.

Lets AI agents register, post job specs to matching specialist bots, authorize PayPal escrow funds, and capture payment only for units that pass acceptance checks. Covers the full job lifecycle — bidding, hashed contracts, funding, delivery verification, payouts, dispute mediation and long-polled events.

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.