Is Circle Agent Stack MCP open source?

Partly. Some of Circle Agent Stack MCP is published as source (https://github.com/kinance/circle-agent-stack-mcp) and some is not. Checked as of 2026-10-21.

Which chains does Circle Agent Stack MCP support?

Circle Agent Stack MCP lists support for Ethereum, Base as of 2026-10-21.

Is Circle Agent Stack MCP still maintained?

The most recent code activity Sato Hub observed was on 2026-06-04 (last commit 2026-06-04, last release 2026-06-04), which Sato Hub labels "Quiet". Posts on X are not counted as maintenance. Activity is a recency signal, not a quality judgment.

Is Circle Agent Stack MCP verified on Sato Hub?

No independent verification is on record for Circle Agent Stack MCP; its verification status is "Unverified" and its Sato Score is 52 of 100. Self-reported is not verified, and the score is not a safety, quality or returns grade.

Wallet Infrastructure

Circle Agent Stack MCP

MCP wrapper around Circle's Agent Stack — create USDC wallets, set spend policies, send stablecoin, and pay x402-gated endpoints.

Sato Score52
ChainsEthereum, Base

EarlyUnverifiedQuiet · 5mo ago

Circle Agent Stack MCP is a partly open-source wallet infrastructure on Ethereum and Base, with last code activity on 2026-06-04 (Quiet). Latest release on 2026-06-04. Sato Score 52/100 (how open, active and verifiable it is, not a safety grade), as of 2026-10-21. How the score works →

See how to install Circle Agent Stack MCP →

Last commit Jun 4, 2026 · Last release Jun 4, 2026 · ★ 1

Listed from developers.circle.com on 2026-07-19. Install: not attempted. Evidence →

Website ↗GitHub ↗

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Watch Circle Agent Stack MCP

One email if what we observe changes — its repo goes quiet or disappears, or the listing is retired. Nothing else.

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Run Sato Hub Preflight on kinance/circle-agent-stack-mcp before I use it.

Full setup: Claude Code, Cursor, others →

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.

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Overview

This MCP server wraps Circle's official Agent Stack CLI as tool calls: creating dev/hosted/smart wallets, setting daily spend caps, sending USDC, and paying x402-priced API endpoints from a coding assistant. It has 2 releases (latest v0.1.3, June 2026), tests, and a Dockerfile — a thin, documented layer over Circle's own infrastructure rather than a standalone custody system.

Sato Score

52/100· Medium

How open, active & verifiable — not a safety or returns grade.

Maintenance & liveness: 20/35
Code transparency: 13/20
Interface verifiability: 8/10
Docs & demo: 0/10
Listing transparency & provenance: 6/15
Independent verification: 5/10

View verification & embed badge →History →How the Sato Score works

Sato Check

v0.1.3 · as of 2026-09-29

Does it take your key?: No key read found
Does your key leave?: Not yet run
Can it move funds on its own?: Unknown

Full profile, evidence and limits →

A profile describes what we read and ran, with dates. It is not a safety rating, an audit or an endorsement, and "not found" is not "not there".

Evidence — listed vs checked · what the words mean

Listed from developers.circle.com on 2026-07-19. Install: not attempted.

Claim	Value	Evidence	Source	Checked
Chains supported	Ethereum, Base	self-reported	developers.circle.com	as of 2026-10-21
Verification status	Unverified — not independently reviewed	self-reported	developers.circle.com	as of 2026-10-21
Recent activity	last release 2026-06-04 · last commit 2026-06-04	observed	github.com/kinance/circle-agent-stack-mcp	2026-10-21
Install works	documented by the project, not run by Sato Hubnot attempted: the run did not complete and the log named no cause we could attribute	self-reported	github.com/kinance/circle-agent-stack-mcp	as of 2026-10-19
Website answers	answered (HTTP 200)	observed	developers.circle.com	2026-10-21
Daily check record	90 of 90 daily checks since 2026-07-23 succeededa success rate of our checks, not uptime; the source is this listing's own history	observed	—	2026-10-20
Takes your key	no private-key read found in what we read	traced	satohub.ai	2026-09-29
Key leaves the machine	not yet run with planted test keysthe sandbox lane has not run on this version	observed	satohub.ai	not dated
Moves funds on its own	unknown — could not read what it exposes	traced	satohub.ai	2026-09-29
Sato Score	52/100 (Medium)how open, active and verifiable — not a safety or quality grade	computed	satohub.ai	2026-10-21

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.

Install — not run by us — the run did not complete and the log named no cause we could attribute

Runtime: Node.js (npx; shells out to the Circle CLI)

npm install -g @circle-fin/circle-cli
circle login
export CIRCLE_API_KEY=your_key_here
npx circle-agent-stack-mcp
{"mcpServers":{"circle":{"command":"npx","args":["-y","circle-agent-stack-mcp"],"env":{"CIRCLE_API_KEY":"your_key_here"}}}}

You supply: CIRCLE_API_KEY (required), CIRCLE_PAYOUT_ADDRESS (required for self-hosted x402 paywall mode)

MCP invocation: npx -y circle-agent-stack-mcp (stdio); also `claude mcp add circle -- npx -y circle-agent-stack-mcp`

Read from the project’s own docs as of 2026-10-19. What a deploy spec is →

Observed record — 91 daily checks since 2026-07-23

100%of 91 checks since 2026-07-23 succeeded

Currently responding for 91 days

Succeeded: 91
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. 40 of these checks predate 2026-09-01, when the probe counted a bot-block (HTTP 403) as a failure and recorded no reason for any failure. Every one of them passed, so the rate covers them too.

Last 30 days — to 2026-10-21, one point per UTC day

Share of OUR checks that succeeded

100%

7-day rolling; unattributable days are gaps · 30/30 days

Tools listed

fewer than 2 points—

from the server's own tools/list · 0/30 days

Sato Score

as snapshotted that day · 29/30 days

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: Ethereum, Base
Agent types: MCP server
Open source: Partial
Last checked: 2026-10-21

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.

#mcp#usdc#wallet#x402#circle

Where Circle Agent Stack MCP fits

Payments Wallets

Related concepts: How Agents Use Wallets, What Are Onchain Agents?

See something inaccurate or outdated?Submit a correction →

Listing History

Recorded changes to Circle Agent Stack MCP's listing — status, verification, Sato Score, and recent releases. Full history is kept in the listing record.

Oct 19, 2026
Verified: deploy spec
Jul 24, 2026
Sato Hub began tracking this listing
Jul 19, 2026
Edited: website url
Jul 19, 2026
Listed on Sato Hub

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Reference

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Sato Hub. "Circle Agent Stack MCP — Sato Hub." Sato Hub, updated 2026-10-21, accessed 2026-10-21. https://satohub.ai/resources/circle-agent-stack-mcp

Data last refreshed 2026-10-21; 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.

Circle Agent Stack MCP

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Overview

Sato Score

Sato Check

Evidence — listed vs checked · what the words mean

Install — not run by us — the run did not complete and the log named no cause we could attribute

Observed record — 91 daily checks since 2026-07-23

Last 30 days — to 2026-10-21, one point per UTC day

Details

Marketplace Signals

Where Circle Agent Stack MCP fits

Listing History

Compared with

Appears in

Related Resources

Coinbase AgentKit

Hyperliquid

Model Context Protocol (MCP)

Questions people ask about Circle Agent Stack MCP

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