Stripe Gets 71% of Payment Firms’ AI Agent Package Downloads

Developers downloaded the AI agent packages that eight payment companies publish on npm 283,129 times in September 2026. Stripe’s three packages accounted for 200,394 of them, or 70.8%.

HaiPay counted 17 packages published under the companies’ own npm scopes: agent toolkits, which plug a company’s API into agent frameworks; Model Context Protocol (MCP) servers, which expose it to AI assistants; and command-line tools built for agents.

Stripe, then Coinbase and Visa

Stripe’s agent toolkit had 86,396 downloads in September, its MCP server 58,974 and its Link CLI, which lets agents get payment credentials from a Link wallet, 55,024. Coinbase’s five packages had 42,679 between them, and Visa’s CLI, described on npm as AI-powered payments for Claude Code, 26,375.

PayPal’s three packages had 6,144, Paddle’s MCP server 5,409, Mastercard’s two 1,145, Adyen’s MCP server 914 and Worldpay’s, published in February, 69. HaiPay found no comparable packages under the npm scopes of Square, Checkout.com, Braintree or Razorpay.

▼ 插入 Figure 1 — agenttools-inline-01-september-share.png
Caption: npm downloads of payment companies’ AI agent toolkit, MCP and CLI packages, September 2026. Source: npm registry; chart by HaiPay.
Alt: Bar chart of September 2026 npm downloads of payment companies’ AI agent packages: Stripe 200,394, Coinbase 42,679, Visa 26,375, PayPal 6,144, Paddle 5,409, Mastercard 1,145, Adyen 914 and Worldpay 69

New tools, fast releases

Four of the 17 did not exist in January. Worldpay published its MCP server in February. Visa first published its CLI on 3 April 2026 and has released 727 versions since. Stripe’s Link CLI followed on 15 April and Coinbase’s CLI on 18 May.

Across all 17, monthly downloads rose from 103,783 in January to 283,129 in September, after a peak of 384,405 in April.

▼ 插入 Figure 2 — agenttools-inline-02-monthly.png
Caption: Monthly npm downloads of 17 payment AI agent packages by company, October 2025 to September 2026. Source: npm registry; chart by HaiPay.
Alt: Stacked column chart of monthly npm downloads of 17 payment AI agent packages from October 2025 to September 2026, rising from about 104,000 in January to 283,000 in September, mostly Stripe

Small next to the SDKs

The numbers are small beside the companies’ main software kits. Stripe’s core npm package was downloaded 85.9 million times in September, about 430 times its three agent packages combined. In January the multiple was about 270: the core package has grown faster this year than the agent tools.

On PyPI, Python’s package index, Stripe’s agent toolkit had 6,511 downloads in September and Coinbase’s 6,379.

Why this matters

For merchants and payment providers, these packages are one of the few measurable signs of which payment APIs developers are wiring into AI agents. On npm, so far, that is mostly Stripe, with Visa the fastest newcomer.

What this does not show

Downloads are not users, agents or payments. npm counts include automated installs by build systems, and hosted MCP servers that need no download are not counted. HaiPay did not contact the companies named.

What to watch

Whether Visa’s CLI overtakes Coinbase’s packages.

Whether more acquirers publish their own MCP servers.

And whether agent package downloads start to grow faster than the core SDKs.