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kinance/circle-agent-stack-mcp
MCP server for Circle Agent Stack — wallet management, USDC transfers, and x402 nanopayments via tool calls
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Config template (adjust for your client)
claude mcp add circle-agent-stack-mcp -- npx -y circle-agent-stack-mcp
A pasteable skeleton generated from the repository name. Check the project README for the exact package and arguments.
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- 1 ★ · kinance/circle-agent-stack-mcp · read from the GitHub search API · (checked 2026-10-16 20:00:20)
- Source
- collected from the punkpeye/awesome-mcp-servers list · type: MCP server
- Harvest history
- first seen 2026-10-09 · last seen 2026-10-16 · seen 32× · listed by 7 sources
- Score
- score 703 · 1 ★ · 7 sources · mcp
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How do I install it?
We did not find an install command for this repository (our install coverage is only about 4%). Check its README or releases page.
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We filed it under these tags: MCP 服务. The tags come from the entry itself, not a taxonomy we imposed.
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kinance/circle-agent-stack-mcp；first catalogued 2026-10-09；last seen 2026-10-16。There is no official certification or quality rating here — we record sources and dates only.Third-party quality signals
circle-agent-stack-mcp
以下摘录自该仓库的 README（片段） · 在 GitHub 读完整 README →
MCP server for Circle's Agent Stack. Create wallets, set spend policies, send USDC, and pay x402-priced endpoints — all from a tool call.
Tools
| Tool | What it does |
|---|---|
| circle_wallet_create | Create an agent wallet (dev/hosted/smart) |
| circle_wallet_list | List wallets with USDC balances |
| circle_balance | Balance + last 10 txns for a wallet |
| circle_policy_set | Set daily cap, x402 cap, allow/block lists |
| circle_transfer_usdc | Send USDC to an on-chain address |
| circle_x402_pay | Pay an x402-priced endpoint and return its response |
Quickstart
You need the Circle CLI installed and authenticated:
Claude Desktop
Claude Code
Example
Self-hosting with x402 paywall
http-server.ts wraps the same tools behind an x402 paywall — agents pay per call in USDC rather than using an API key. Useful if you want to expose Circle tooling as a paid service.
To test the x402 flow locally, run the toy demo server in examples/x402-demo-server.mjs.
How it works
v0.1 shells out to the Circle CLI for all operations. This keeps auth handling out of this repo and avoids reimplementing the API client before the tool surface is validated. v0.2 will switch to direct HTTP via @circle-fin/circle-sdk.
Security
Your Circle API key has spend authority. Always:
- Set daily_cap_usdc before enabling automated payments
- Start on type="dev" wallets, not mainnet
- Review the allowlist before moving to production
- Don't commit CIRCLE_API_KEY
Roadmap
- [ ] circle_nanopayment_stream — streaming x402 payments for per-token billing
- [ ] circle_skills_list / circle_skills_call — Circle Skills marketplace
- [ ] Direct HTTP API mode (v0.2) — remove CLI dependency
- [ ] Multi-chain — EURC, CCTP cross-chain transfers
Related
- Circle Agent Stack docs
- x402 protocol
Tools
| Tool | What it does |
|---|---|
| circle_wallet_create | Create an agent wallet (dev/hosted/smart) |
| circle_wallet_list | List wallets with USDC balances |
| circle_balance | Balance + last 10 txns for a wallet |
| circle_policy_set | Set daily cap, x402 cap, allow/block lists |
| circle_transfer_usdc | Send USDC to an on-chain address |
| circle_x402_pay | Pay an x402-priced endpoint and return its response |
Quickstart
You need the Circle CLI installed and authenticated:
Claude Desktop
Claude Code
Example
Self-hosting with x402 paywall
http-server.ts wraps the same tools behind an x402 paywall — agents pay per call in USDC rather than using an API key. Useful if you want to expose Circle tooling as a paid service.
To test the x402 flow locally, run the toy demo server in examples/x402-demo-server.mjs.
How it works
v0.1 shells out to the Circle CLI for all operations. This keeps auth handling out of this repo and avoids reimplementing the API client before the tool surface is validated. v0.2 will switch to direct HTTP via @circle-fin/circle-sdk.
Security
Your Circle API key has spend authority. Always:
- Set daily_cap_usdc before enabling automated payments
- Start on type="dev" wallets, not mainnet
- Review the allowlist before moving to production
- Don't commit CIRCLE_API_KEY
Roadmap
- [ ] circle_nanopayment_stream — streaming x402 payments for per-token billing
- [ ] circle_skills_list / circle_skills_call — Circle Skills marketplace
- [ ] Direct HTTP API mode (v0.2) — remove CLI dependency
- [ ] Multi-chain — EURC, CCTP cross-chain transfers
Related
- Circle Agent Stack docs
- x402 protocol
- Source
- awesome · https://github.com/kinance/circle-agent-stack-mcp
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