Circle2026-08-07 04:54:46Circle launches Discovery API for AI agents to find and pay USDC-enabled servicesCircle has introduced its Discovery API, a new tool designed to let AI agents discover services that accept USDC and pay for them on their own. The company said the API is available as a public endpoint that can be queried without authentication. It supports filtering across 14 parameters, including category, blockchain, and price, while all listed services have gone through compliance pre-screening. The product is built on top of Circle’s Agent Stack, which the company released in May, and its initial coverage includes Arbitrum, Base, and Ethereum. According to CryptoBriefing, Circle is using the launch to set itself apart from other stablecoin issuers by building machine-to-machine payment infrastructure. The company also said developers can integrate the API without having to migrate their existing tech stacks.1890
Circle2026-07-31 02:44:24Circle launches x402 and Agent Stack to let API providers accept USDC paymentsCircle has introduced the x402 payment protocol and the Agent Stack developer toolkit, aiming to help API providers take payments in USD Coin (USDC) and support pay-per-use business models. The setup is designed for the emerging market of autonomous AI agents, where machine customers can call services and pay for them directly instead of going through subscriptions or traditional checkout pages. Circle grouped the services into three categories: data intelligence, digital infrastructure, and real-world execution. The examples cited include market data, browser automation, and local delivery. The company also said developers can convert existing endpoints into services that agents can call, with preset pricing that enables instant transactions. That structure is intended to open up micropayment use cases that were previously difficult to monetize because the payment amounts were too small.1990
Circle2026-07-11 01:20:00Circle open-sources Agent Stack starter kit for AI agents with wallets and USDC paymentsCircle said its Agent Stack starter kit is now open source, giving developers a way to add wallet support, USDC payments, and onchain actions to AI agents. The toolkit is designed to work with several widely used agent and AI development frameworks, including OpenAI Agents SDK, Claude Agent SDK, LangChain Deep Agents, Mastra, Vercel AI SDK, and Google AI ADK. The announcement points to a developer-focused release aimed at making crypto-enabled agent functions easier to integrate across existing AI stacks. Circle did not disclose additional technical details in the source post beyond the supported frameworks and core capabilities.1770
