astronomer-data-agents vs Estuary Flow MCP by usefulapi
astronomer-data-agents is a plugin bundle for AI coding tools published by astronomer. Marketplaces we read that list it: 2 (Claude Code: claude-plugins-official, Claude Code: claude-plugins-community). Estuary Flow MCP by usefulapi is an MCP server published by usefulapi.io. Marketplaces we read that list it: 1 (Official MCP Registry). As of our marketplace pass on 2026-10-16. 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 |  astronomer-data-agents |   Estuary Flow MCP by usefulapi |
|---|---|---|
| Claude Code: claude-plugins-official | Listed Version: 0.1.0 Forks (GitHub): 69 Stars (GitHub): 452 Not marked · First seen |
Not listed |
| Claude Code: claude-plugins-community | Listed Version: 0.1.0 Forks (GitHub): 69 Stars (GitHub): 452 Not marked · First seen |
Not listed |
| Official MCP Registry | Not listed | Listed Version: 1.11.1 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 | astronomer-data-agents | Estuary Flow MCP by usefulapi |
|---|---|---|
| Marketplaces that list it (differs) | 2 (better) | 1 (worse) |
| Stars (GitHub) (differs) | 452 (better) | 0 (worse) |
| Forks (GitHub) (differs) | 69 (better) | 0 (worse) |
| Last release | Not published | Not published |
| Where it runs (differs) | Installs as a plugin bundle | Remote server (estuary-flow.usefulapi.io/mcp) |
| Transport (differs) | Not stated | Streamable HTTP |
| Tools it declares | Not published | Not published |
| Environment variables it asks for | Not published | Not published |
| Hooks it runs (differs) | 2 | Not published |
| Parts of the bundle (differs) | 36 | Not a bundle |
| Licence | Not stated | Not stated |
| Repository (differs) | github.com/astronomer/agents | github.com/m190/usefulapi-mcp |
| Changes in the last 7 days | 0 | 0 |
| First seen | 2026-10-11 | 2026-10-11 |
| Endpoint at the last check (differs) | no remote endpoint we check | Responded 35 h ago, requires a key |
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
astronomer-data-agents
Data engineering for Apache Airflow and Astronomer. Author DAGs with best practices, debug pipeline failures, trace data lineage, profile tables, migrate Airflow 2 to 3, and manage local and cloud deployments.
Estuary Flow MCP by usefulapi
Inspect Estuary Flow captures, materializations, collections and stats.
How to run each
astronomer-data-agents As a Claude Code plugin
/plugin install astronomer-data-agents@claude-plugins-officialEstuary Flow MCP by usefulapi As a remote MCP server
claude mcp add --transport http estuary-flow https://estuary-flow.usefulapi.io/mcpCommands built only from what the marketplaces declare; the full set for every client is on each card.
Only Estuary Flow MCP by usefulapi has a remote endpoint we check. How we check endpoints
Tools each declares
Neither one's marketplaces publish a list of tools, so there is nothing to compare.
Settings each asks for
Neither one's marketplaces publish the settings it asks for.
What it can do: astronomer-data-agents · What it can do: Estuary Flow MCP by usefulapi · 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 the public marketplace file https://github.com/anthropics/claude-plugins-community/blob/HEAD/.claude-plugin/marketplace.json. 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.