"Interacting with a webpage using a browser plugin and live browser instance" matching MCP servers:

Official Dodo Payments MCP servers - dodopayments-api for live payments, subscriptions, customers, products, refunds, license keys, and usage-based billing (browser OAuth, no API key needed) and dodo-knowledge for semantic search over Dodo Payments documentation.

Approval receipts for AI browser purchases. Enables purchase evaluation, approval recording, budget alerts, and receipt export.

Enables agents and IDE assistants to validate x402 payment endpoints without shelling out: it fetches a URL unpaid and returns a conformance report on the returned 402 challenge, decodes and classifies base64 payment blobs, and summarises which scheme/network pairs a facilitator can settle.

Discover audio and LLM services, compare seven voices, and check prices for free. Generate speech, transcribe audio and request LLM text with optional capped USDC payments on Base; voice-cloning requirements are also available.

Credit and payments for AI agent developers — over MCP. No crypto required

Enables users to discover and query multiple AI models, request second opinions or bulk completions, inspect balance and usage, manage referrals and wallet-based keys, and generate configuration for various coding tools.

Enables agents to create and pay for physical postcards and letters, returning print previews and Stripe checkout links, with human review before USPS First-Class mailing to US addresses.

SIMcloud is a hosted South African MCP server for wallet balance checks, network lookups, SMS sending, airtime recharges, data bundle purchases, and prepaid electricity orders. It connects over Streamable HTTP and uses each user's own SIMcloud account via OAuth.

Enables AI agents to manage global shipping operations, including rate comparison, shipment creation, label purchasing, tracking, pickup scheduling, address validation, billing, and analytics, via natural language.

Enables Vellum assistants to search and book flights and hotels, assemble trips, check out, pay agentically, and service bookings through Jinko's remote MCP endpoint.

Remote MCP server for searching, booking, paying, and canceling hotel stays via Travala, with USDC payment through Algorand x402.

Checks live x402 routes across Base, Solana, and Algorand before agents spend. $0.003 USDC settles only for a valid live eligible route; normal typed misses are not settled. Free preview and validate tools. Seller payment is separate; the agent keeps its wallet. Optional signed route-binding receipts support buyer-side checks.

A pre-payment safety gate for x402 that screens payment metadata for PII, enforces spending policies, and detects replay attacks before signing.

Enables AI agents to call paid APIs and settle HTTP 402 payment challenges with USDC on Base, without private keys ever being involved.

A paid MCP server that lets AI agents send SMS messages to US phone numbers via x402 micropayments, with automatic compliance and opt-out handling.

Keyless crypto payments for AI agents. One MCP call turns any wallet address into a non-custodial crypto payment link or tip jar, no API key and no account, with funds settling straight to your wallet at a 0% platform fee (USDC/USDT, BTC, LTC, DASH, DOGE, ZCASH).

Keyless MCP exchanger for AI agents — pay an exact amount to one deposit address, EMC delivered to any address. USDT(Tron) > EMC. Live at https://swap.emercoin.com/mcp

Reads and validates any European e-invoice a business receives — XRechnung, UBL, CII, ZUGFeRD/Factur-X PDF, Peppol BIS 3, FatturaPA, KSeF FA(3) — into canonical EN 16931 JSON with plain-language fix hints in EN/DE/PL/IT/FR, plus PDF, CSV and DATEV export. Nothing is stored; works without a key on a small daily quota.

Lets an AI agent hire and pay a verified human: post real-world tasks (voice, observation, judgment) and pay in USDC via a non-custodial x402 auth-capture escrow on Base, budget frozen at deploy. Humans verify their X identity before submitting.

A local, read-only stdio MCP server that lets a Grok Build CLI agent check how much of its weekly SuperGrok / Grok Build usage pool is left, when the period resets, and its Extra Usage cap via tools like get_budget. It reads the existing grok login session and returns per-product figures as JSON, mirroring the TUI /usage screen, so agents can pause before expensive work when quota runs low.