circle-skills vs Agent Data Tools: Chain data
circle-skills is a plugin bundle for AI coding tools published by circlefin. Marketplaces we read that list it: 2 (Claude Code: claude-plugins-official, Community GitHub marketplaces). Agent Data Tools: Chain data is an MCP server published by Nutshell2000. Marketplaces we read that list it: 1 (Official MCP Registry). As of our marketplace pass on 2026-10-20. This pair was picked by a reader, not by our comparison rule, so search engines are asked not to index the page.
Where each is published
| Marketplace |  circle-skills |  Agent Data Tools: Chain data |
|---|---|---|
| Claude Code: claude-plugins-official | Listed Version: 1.6.0 Forks (GitHub): 62 Stars (GitHub): 157 Not marked · First seen |
Not listed |
| Official MCP Registry | Not listed | Listed Version: 1.44.0 Forks (GitHub): 0 Stars (GitHub): 0 Not marked · First seen |
Each figure is the marketplace's own and is never added up across marketplaces. A marketplace that publishes no figure shows none: no number is not zero.
The facts side by side
| Fact | circle-skills | Agent Data Tools: Chain data |
|---|---|---|
| Marketplaces that list it (differs) | 2 (better) | 1 (worse) |
| Stars (GitHub) (differs) | 157 (better) | 0 (worse) |
| Forks (GitHub) (differs) | 62 (better) | 0 (worse) |
| Last release (differs) | 2026-10-16 (worse) | 2026-10-20 (better) |
| Where it runs (differs) | Remote server (api.circle.com/v1/codegen/mcp) | Remote server (agent-data-tools.revmesh2074.workers.dev/mcp/chain) |
| Transport | Streamable HTTP | Streamable HTTP |
| Tools it declares | Not published | Not published |
| Environment variables it asks for | Not published | Not published |
| Parts of the bundle (differs) | 20 | Not a bundle |
| Licence (differs) | Apache-2.0 | Not stated |
| Repository (differs) | github.com/circlefin/skills | github.com/nutshell2000/agent-data-tools |
| Changes in the last 7 days (differs) | 1 | 20 or more |
| First seen (differs) | 2026-10-11 | 2026-10-19 |
| Endpoint at the last check (differs) | Responded 2 days ago | not checked yet |
Lines where the two differ have a tinted background and bold values. Where the data itself says which value is better (more marketplaces, a larger figure of the same marketplace, a fresher release, a verified mark on a marketplace that lists both), the better one is also marked green with ▲ and the worse one red with ▼. Where it runs, the transport, the tools, the settings, hooks, the bundle's parts, the licence and the week's changes are marked only as different: more or fewer is not better in itself.
What each says it does
circle-skills
Ship stablecoin apps faster. Best-practice skills for USDC payments, cross-chain transfers, wallets, and smart contracts — plus Circle's MCP server for real-time SDK and documentation guidance.
Agent Data Tools: Chain data
64 tools: balances, blocks, gas, txs and logs on 5 EVM chains, plus Bitcoin. 25 free calls.
How to run each
circle-skills As a Claude Code plugin
/plugin install circle-skills@claude-plugins-officialAgent Data Tools: Chain data As a remote MCP server
claude mcp add --transport http agent-data-tools-chain https://agent-data-tools.revmesh2074.workers.dev/mcp/chain --header "Authorization: Bearer <YOUR_TOKEN>"Requires: Authorization header
Commands built only from what the marketplaces declare; the full set for every client is on each card.
Only circle-skills has a remote endpoint we check. How we check endpoints
Tools each declares
Neither the marketplaces of Agent Data Tools: Chain data nor its endpoint list any tools, so we do not compare tools.
Settings each asks for
Neither one's marketplaces publish the settings it asks for.
What it can do: circle-skills · What it can do: Agent Data Tools: Chain data · Compare two other plugins
Data comes from the public marketplace file https://github.com/anthropics/claude-plugins-official/blob/HEAD/.claude-plugin/marketplace.json. Data comes from public marketplace files in GitHub repositories of their authors. Data comes from the Official MCP Registry (registry.modelcontextprotocol.io), CC0 1.0. Figures come from our own regular passes over the marketplaces, last read on . We publish no contact details for plugin publishers.