The request is generic ('payment-assistant') and does not name a platform or constraint, but the most established option for building a payment assistant is Stripe, which exposes an MCP server, API, SDK and CLI and has payment actions such as creating a PaymentIntent 111. Alternatives depend on whether you need card payments, crypto/stablecoin rails, or agent micropayments 2310.
A question back: Which payment rail do you need (cards, stablecoins/crypto, or per-call agent micropayments), and which platform or language will the assistant run on?
- 1
Stripe APIstripe.comverified and signed
Stripe is a payments platform with an MCP server, API, SDK and CLI, where an assistant can create a PaymentIntent to accept a payment or pay an invoice 111.
official:MCP server · @stripe/mcpAPI · Stripe APISDK · stripelibrary · Stripe.netCLI · stripe-cli+37 community tools built for it
for agents: PostPaymentMethods · PostPaymentIntents · PostInvoicesInvoicePay
- 2
- 3
StableOpsstableops.devfound in code, not yet checked
A stablecoin payment API with USDC/USDT collection, on-chain confirmation and webhooks, with tools to read and list payment intents 10.
for agents: stableops_ap_get_payment · stableops_get_payment · stableops_ap_list_payments
- 4
bolthub.aibolthub.aiwebsite read, tools not yet checked
Lets agents pay per call over Lightning for any MCP tool or API, with MCP and package access for charging per request 3.
official:MCP server · bolthubpackage · bolthubMCP server · bolthub Marketplace+1 community tools built for it
Sources
- 1Stripe | Financial Infrastructure to Grow Your Revenuestripe.com · read 2026-10-29
- 2Coinbase Developer Docs - Coinbase Developer Documentationdocs.cdp.coinbase.com · read 2026-10-29
- 3Charge AI agents for your tools, per call | bolthub.aibolthub.ai · read 2026-10-29
- 10StableOps | Stablecoin payment and on-chain event platform · StableOpsstableops.dev · read 2026-10-29
- 11Stripe API: declares "PostPaymentMethods" (the record we read and signed)unfragile.ai · read 2026-10-24
- 12pay-for-service: declares "pay-for-service" (the record we read and signed)unfragile.ai · read 2026-10-24
For agents: the 10 actions behind this answer
PostPaymentMethods · Stripe API verified and signed
Create a PaymentMethod
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.
· bolthub.ai website read, tools not yet checked
Card networks can't price an API call; bolthub can. Agents pay per call over Lightning for any MCP tool or API, straight to your wallet. From 1 sat.
· AIPayGen API docs website read, tools not yet checked
API reference for AIPayGen Site Intel tools.
CreateX402PaymentHeader · mcp-x402 found in code, not yet checked
Create the X402 payment headers for a given payment request as per https://www.x402.org/
· BlindPay website read, tools not yet checked
BlindPay is a stablecoin API infrastructure for global finance, connecting stablecoins, local payment rails, business accounts, and compliance through a unified API. We streamline global payments by ensuring full compliance and regulatory alignment, empowering companies to move money seamlessly acro
newPaymentRequest · Fire Financial Services Business API verified and signed
Create a Fire Open Payment request
· x402 List API website read, tools not yet checked
An independent x402 directory of APIs that AI agents pay per request. Browse endpoint pricing, monitored uptime and observed settlement activity.
· Payments AI website read, tools not yet checked
Monetize AI from day one with one agentic billing layer: merchant-of-record payments for AI apps and gateway orchestration for platforms and marketplaces.
stableops_ap_get_payment · StableOps Agent Payments MCP Server found in code, not yet checked
Read a payment intent, state transitions, and receipt when available.
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.