The request names "mupag", which does not appear among the candidate products, so no sandbox for it can be confirmed here. The closest fit for sandbox payments is Stripe 1, whose source describes a payments platform with test-mode operations, followed by Plaid 4, which offers sandbox simulation for transfers, and LuniumPay 10, which provides a payments sandbox.
A question back: Did you mean a specific product called MuPag, and which payment method or platform do you want to sandbox?
- 1
Stripestripe.comverified and signed
Payments platform with an API, SDK and CLI, including test-mode operations such as posting test OutboundPayments 1.
official:MCP server · @stripe/mcpAPI · Stripe APISDK · stripelibrary · Stripe.netCLI · stripe-cli+37 community tools built for it
for agents: PostPayouts · PostTestHelpersTreasuryOutboundPaymentsIdPost · PostPaymentMethodDomains
- 2
Plaid APIplaid.comverified and signed
Plaid's API includes Sandbox endpoints that simulate bank transfer and transfer events for testing 4.
official:API · The Plaid API+16 community tools built for it
for agents: sandboxBankTransferSimulate · sandboxTransferRepaymentSimulate · sandboxTransferSimulate
- 3
LuniumPayluniumpay.comverified and signed
Brazilian PIX and stablecoin payments API with a sandbox for testing before production, and an action that provisions a test API key without prior credentials 10.
official:MCP server · com.luniumpay/luniumMCP server · Lunium — Brazilian PIX and stablecoin payments
for agents: Get your own sandbox API key (no API key required) · Get your own sandbox API key (no API key required) · Check your synthetic sandbox test
Sources
- 1Stripe | Financial Infrastructure to Grow Your Revenuestripe.com · read 2026-10-29
- 4Home | Plaid Docsplaid.com · read 2026-10-29
- 10LuniumPay | API Pix para receber e enviar pagamentosluniumpay.com · read 2026-10-29
For agents: the 10 actions behind this answer
PostPayouts · Stripe API verified and signed
Create a payout
muapi_account_topup · Muapi verified and signed
Create a Stripe checkout session to add credits to the muapi.ai account. Returns a checkout URL — open it in a browser to complete payment.
Execute Python in a sandbox · Pydantic verified and signed
Run Python code in a secure sandbox with access to Logfire platform helper functions for advanced analysis.
sandboxBankTransferSimulate · The Plaid API verified and signed
Simulate a bank transfer event in Sandbox
pay-for-service · pay-for-service verified and signed
Make a paid API request to an x402 endpoint with automatic USDC payment. Use when you or the user want to call a paid API, make an x402 request, use a paid service, or pay for an API call. Use after finding a service with search-for-service.
sandbox · @daytonaio/sdk verified and signed
paypal · paypal verified and signed
PayPal development plugin for Claude — integrate payments, subscriptions, invoices, disputes, and more using PayPal's APIs and MCP server
run_code · e2b-mcp-server found in code, not yet checked
Run python code in a secure sandbox by E2B. Using the Jupyter Notebook syntax.
· mcpaid(1) website read, tools not yet checked
Turn any Model Context Protocol (MCP) tool into a monetized API in 60 seconds. Terminal-native micropayments for AI agents via HTTP 402, pre-funded session wallets, and Base L2.
Get your own sandbox API key (no API key required) · Lunium verified and signed
Provisions a Lunium TEST api key for you, in one call, with no prior credentials, no human approval and no money involved. Use it when a Lunium tool told you erro="chave_ausente" and you want to explore the API yourself instead of stopping to ask your user for credentials.
Labels are the instruments' verdict and are never changed by ranking. Agents and robots get this same answer as JSON at /api/v1/find?q=…&answer=1 and through the MCP server.