Fluxmail Cloud vs Sickle — every mailbox for your agent
Fluxmail Cloud is an MCP server published by fluxmail.ai. Marketplaces we read that list it: 1 (Official MCP Registry). Sickle — every mailbox for your agent is an MCP server published by sickle.app. Marketplaces we read that list it: 1 (Official MCP Registry). As of our marketplace pass on 2026-10-29. 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 |  Fluxmail Cloud |  Sickle — every mailbox for your agent |
|---|---|---|
| Official MCP Registry | Listed Version: 0.1.0 No figure published Not marked · First seen |
Listed Version: 1.1.0 No figure published 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 | Fluxmail Cloud | Sickle — every mailbox for your agent |
|---|---|---|
| Marketplaces that list it | 1 | 1 |
| Last release (differs) | Not published | 2026-10-16 |
| Where it runs (differs) | Remote server (cloud.fluxmail.ai/mcp) | Remote server (mcp.sickle.app) |
| Transport | Streamable HTTP | Streamable HTTP |
| Tools it declares | Not published | Not published |
| Environment variables it asks for | Not published | Not published |
| Licence | Not stated | Not stated |
| Repository | Not stated | Not stated |
| Changes in the last 7 days (differs) | 2 | 0 |
| First seen (differs) | 2026-10-23 | 2026-10-14 |
| Endpoint at the last check (differs) | not checked yet | Responded 2 days 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
Fluxmail Cloud
Hosted MCP server for your Gmail, Outlook and IMAP mail, with mailboxes and scopes set per agent.
Sickle — every mailbox for your agent
Gmail, Outlook, iCloud, Fastmail and any IMAP mailbox for your agent. Scoped OAuth, approved sends.
How to run each
Fluxmail Cloud As a remote MCP server
claude mcp add --transport http cloud https://cloud.fluxmail.ai/mcpSickle — every mailbox for your agent As a remote MCP server
claude mcp add --transport http mail https://mcp.sickle.appCommands built only from what the marketplaces declare; the full set for every client is on each card.
Only Sickle — every mailbox for your agent 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: Fluxmail Cloud · What it can do: Sickle — every mailbox for your agent · Compare two other plugins
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.