Base Hosts 32,000 USDC Senders on x402 Payment Protocol

152% Growth Across Tracked Networks

Data from Token Terminal's x402 dashboard counts 43,100 active senders on the AI agent payment protocol over the past 30 days, and 32,000 of them sent USD Coin (USDC) on Base, the largest tally of any network in the tracker. Algorand follows with 9,100 senders and Solana with 1,500. Across every network the dashboard covers, active senders are up 152% from 30 days earlier, growth that has put this PayFi rail among the faster-expanding corners of on-chain settlement. The USDC price has held its dollar peg through the stretch, which keeps the unit of account predictable for automated transactions. x402 lets autonomous software agents pay for services over standard web requests, with settlement denominated in a stablecoin rather than a chain's native token. Each entry in the tally is a distinct wallet address that initiated at least one payment inside the window, so the figure measures participation, not money moved. The dashboard's own definition matters here: an active sender has simply taken part in a payment, and the metric says nothing about transfer size or about total usage by AI agents across the protocol. That qualification does not dilute the headline number. A 152% rise on a base measured in tens of thousands of addresses is expansion in the population actually using the rail. Within the window published on 2026-10-18, no other tracked network came close to Base, and the concentration there, where roughly three quarters of all tracked senders sent USDC, marks that chain as the default venue for USDC payments by autonomous agents.

USD Coin functions as the settlement asset across the wider set of networks named in agent payment coverage: Base, Algorand, Solana, Polygon (POL) and Canton. The token's supply has moved inside a $70 billion to $80 billion band over the past 12 months, a scale that clears the European Union's MiCA e-money threshold of €5 billion, the level the bloc's framework sets for significant e-money tokens, by more than an order of magnitude. Unlike a central bank digital currency, USDC is issued by a private company, Circle, which also runs a marketplace for AI agent services that accepts payment in the token, a service described in earlier coverage. Tether's USDT still holds the larger share of the overall stablecoin market, so USDC's sender concentration on x402 describes one rail, not the whole sector. The limits on the figures come from the data itself. Circulation measures tokens issued to the market and cannot show how much money has actually flowed into agent payments, or how much new capital the trend has pulled in. Market share and x402 sender counts are separate measures, and reading them side by side does not produce a share of the agent payment market as a whole. What the numbers do establish is placement: the asset most often chosen for machine settlement, on the chain most often chosen to carry it. Circle's distribution build-out runs in parallel, with USDC payment rails slated for about 40 emerging markets and USDC distribution costs consuming 58.7% of the issuer's first-half revenue. Reserve design sits under separate scrutiny as well, after USDC's 86-cent depeg episode prompted a proposed set of fixes to reserve management.

Breadth, Not Volume

Read closely, the 152% jump measures breadth, not volume. A sender base that grew this fast in 30 days shows the rail reaching more participants; it cannot show the ticket size behind each payment, and the $70 billion to $80 billion circulation band, essentially flat for a year, suggests agent payments are drawing on existing USDC rather than new issuance. The line between what Circle has committed to and what x402 has merely recorded also stays visible: the issuer has built a marketplace that settles in USDC and is expanding payment infrastructure, while the 32,000 figure is observed activity on the networks one tracker covers. The scale of actual spend remains undescribed, and that is the number worth waiting for.