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Circle launched a Discovery API in the Circle Agent Stack on 2026-08-06 that…

2026-08-06 · 19:01 UTC ·@jerallaire ·0 min read

Brief

Circle released a Discovery API in its Agent Stack that lets builders query the full Agent Marketplace via one public endpoint (no API key/auth/Circle account needed). The marketplace lists 900+ endpoints and enables wallets, clients, agent frameworks and apps to programmatically discover services accepting USDC and x402, accelerating integration of agentic services.

Why it matters

Circle launched a Discovery API in the Circle Agent Stack on 2026-08-06 that exposes the full Agent Marketplace catalog through a single public endpoint with no API key, auth, or Circle account required.

Key details

  • The Agent Marketplace already lists 900+ endpoints and lets wallets, clients, agent frameworks, and apps programmatically discover services that accept USDC and x402 (details at developers.circle.com/agent-…).
Source evidence

Circle launches new agent service discovery layer, enabling agents to seamlessly discover services they can use and consume using USDC and x402, building on our growing marketplace (900+ endpoints and counting) for agentic services.

Circle (@circle)

Circle Agent Stack now gives builders programmatic access to a curated discovery layer for agentic services.

With the new Discovery API, builders can query the full Agent Marketplace catalog through a single public endpoint, with no API key, auth, or Circle account required.

Wallets, clients, agent frameworks, and apps can discover USDC-accepting services programmatically and build on top of the marketplace without starting from scratch.

Try it out: developers.circle.com/agent-…

— https://nitter.net/circle/status/2085420269557137726#m