Circle Agent Stack
Circle's official agent toolkit: Circle CLI, policy-controlled Agent Wallets, gasless USDC Nanopayments, an x402 facilitator and an agent marketplace.
- Sato Score59
- ChainsBase, Polygon +6
Circle Agent Stack is a partly open-source wallet infrastructure by Circle on Base, Polygon, Ethereum and other chains, with last code activity on 2026-08-28 (Recent). Sato Score 59/100 (how open, active and verifiable it is, not a safety grade), as of 2026-11-07. How the score works →
Check what an install would ask of your keys, before you run it →Last commit Aug 28, 2026 · ★ 30
Listed from circle.com on 2026-09-23. Install: not attempted — no install path on record. Evidence →
Next step
Watch Circle Agent Stack
One email if what we observe changes — its repo goes quiet or disappears, or the listing is retired. Nothing else.
Check it from your agent
Add Sato Hub’s MCP server (no key), then ask:
https://satohub.ai/api/mcpRun Sato Hub Preflight on circlefin/agent-stack-starter-kits before I use it.Your project?
Prove you control the domain and correct this page — description, links, tags, chains. A claim proves control, not verification: it never changes the Sato Score.
Claim this listing →Overview
Circle announced Agent Stack on May 11, 2026. Its docs list Circle CLI, Agent Wallets with spending policies, Agent Nanopayments, an Agent Marketplace, open-source Circle Skills and a hosted x402 facilitator for Arc, Base and Polygon PoS (https://developers.circle.com/agent-stack). Nanopayments via Circle Gateway went live on mainnet on Apr 29, 2026 with gas-free USDC transfers down to $0.000001 on 11 EVM chains (https://www.circle.com/blog/nanopayments-powered-by-circle-gateway-is-now-live-on-mainnet). Runnable starter kits for LangChain, the Claude Agent SDK, the OpenAI Agents SDK, the Vercel AI SDK and Google ADK are published at https://github.com/circlefin/agent-stack-starter-kits (Apache-2.0). The Arc mainnet launch (Sep 16, 2026) extends it to Circle's own chain.
Sato Score
59/100· MediumHow open, active & verifiable — not a safety or returns grade.
- Maintenance & liveness
- 25/35
- Code transparency
- 14/20
- Interface verifiability
- 0/10
- Docs & demo
- 6/10
- Listing transparency & provenance
- 11/15
- Independent verification
- 3/10
Evidence — listed vs checked · what the words mean
Listed from circle.com on 2026-09-23. Install: not attempted — no install path on record.
| Claim | Value | Evidence | Source | Checked |
|---|---|---|---|---|
| Chains supported | Base, Polygon, Ethereum, Arbitrum, Avalanche, Optimism, Sei, Multichain | self-reported | developers.circle.com | as of 2026-11-07 |
| Verification status | Self-Reported — not independently reviewed | self-reported | circle.com | as of 2026-11-07 |
| Recent activity | last commit 2026-08-28 | observed | github.com/circlefin/agent-stack-starter-kits | 2026-11-07 |
| Website answers | answered (HTTP 200) | observed | circle.com | 2026-11-07 |
| Daily check record | 45 of 45 daily checks since 2026-09-23 succeededa success rate of our checks, not uptime; the source is this listing's own history | observed | — | 2026-11-06 |
| Built by | Circleconfidence 0.90 | self-reported | circle.com | as of 2026-09-30 |
| Works with | Claude Code, Cursor, Codex, OpenClaw, LangChain, Claude Agent SDK, OpenAI Agent…confidence 0.85 | self-reported | developers.circle.com | as of 2026-09-30 |
| Sato Score | 59/100 (Medium)how open, active and verifiable — not a safety or quality grade | computed | satohub.ai | 2026-11-07 |
Self-reported rows are the project’s own words, dated when we recorded them — not a check. Only reproduced and reviewed rows carry a mark. None of these rows is a safety or quality rating.
Observed record — 46 daily checks since 2026-09-23
- Succeeded
- 46
- Failed
- 0
- Their error
- 0
- Unattributed
- 0
This is the share of our daily checks that succeeded — not an availability guarantee. A check can fail because the host was down, because our runner timed out, or because the network in between dropped it, and only the first of those is a fact about this project. Failures are split by what we can attribute; anything we cannot attribute is counted, not hidden.
Last 30 days — to 2026-11-07, one point per UTC day
A gap is a day we have no attributable observation — never a zero. Thirty points is the whole shape the free layer carries; the daily rows behind it stay in the snapshot series.
Details
- Chains
- Base, Polygon, Ethereum, Arbitrum, Avalanche, Optimism, Sei, Multichain
- Agent types
- Agent Wallet, Payments
- Open source
- Partial
- Works with
- Claude Code, Cursor, Codex, OpenClaw, LangChain, Claude Agent SDK, OpenAI Agents SDK, Vercel AI SDK +3
- Last checked
- 2026-11-07
Marketplace Signals
No marketplace signals recorded for this resource yet.
Verification status reflects evidence reviewed by Sato Hub. Self-reported claims are never presented as verified.
Where Circle Agent Stack fits
Related concepts: How Agents Use Wallets, What Are Onchain Agents?
Listing History
Recorded changes to Circle Agent Stack's listing — status, verification, Sato Score, and recent releases. Full history is kept in the listing record.
- Sep 30, 2026Auto-enriched: creator name, supported integrations
- Sep 23, 2026Listed on Sato Hub
- Sep 23, 2026Sato Hub began tracking this listing
Compared with
Appears in
- x402 payment tools on Base, scored →
- x402-ready tools, scored →
- Wallets for agents, scored →
- x402 endpoints checked for a payment-required answer →
- x402 facilitators on Base →
- x402: agent payments over HTTP →
- Onchain agents on Base →
- Onchain agents on Ethereum →
- Onchain agents on Arbitrum →
- Onchain agents on Polygon →
- Onchain agents on Optimism →
- Onchain agents on Avalanche →
Related Resources
Agent Payments Protocol (AP2)
ActiveOpen protocol from Google for secure agent-led payments across traditional and crypto rails, with a crypto-native x402 extension built with Coinbase, Ethereum Foundation, and MetaMask.
Zerion
ActiveWallet and DeFi data provider offering portfolio, positions, transactions, PnL, and prices across many chains, with an agent-accessible API.
Bankr
ActiveCrypto execution layer and cross-chain wallet that lets agents and users trade, bridge, and manage assets via natural language, plus a skills marketplace and an x402 cloud for spinning up pay-per-call agent endpoints.
Reference
QuestionsWhat people ask about this pageShowHide
Questions people ask about Circle Agent Stack
- Is Circle Agent Stack open source?
- Partly. Some of Circle Agent Stack is published as source (https://github.com/circlefin/agent-stack-starter-kits) and some is not. Checked as of 2026-11-07.
- Which chains does Circle Agent Stack support?
- Circle Agent Stack lists support for Base, Polygon, Ethereum, Arbitrum, Avalanche, Optimism, Sei, Multichain as of 2026-11-07.
- Is Circle Agent Stack still maintained?
- The most recent code activity Sato Hub observed was on 2026-08-28 (last commit 2026-08-28), which Sato Hub labels "Recent". Posts on X are not counted as maintenance. Activity is a recency signal, not a quality judgment.
- How do I install or run Circle Agent Stack?
- Sato Hub has no deploy spec for Circle Agent Stack; follow the project's own documentation at https://developers.circle.com/agent-stack.
- Is Circle Agent Stack verified on Sato Hub?
- No independent verification is on record for Circle Agent Stack; its verification status is "Self-Reported" and its Sato Score is 59 of 100. Self-reported is not verified, and the score is not a safety, quality or returns grade.
Cite this pagePlain text, APA or BibTeXShowHide
Cite this page
Sato Hub. "Circle Agent Stack — Sato Hub." Sato Hub, updated 2026-11-07, accessed 2026-11-07. https://satohub.ai/resources/circle-agent-stackData last refreshed 2026-11-07; this page is rebuilt daily. Citations carry the date so a reader can tell which snapshot a claim came from. Catalog data is licensed CC-BY-4.0.
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