E2B vs ultracost
E2B is an MCP server published by e2b-dev. Marketplaces we read that list it: 1 (Docker MCP Catalog). ultracost is a plugin bundle for AI coding tools published by danielkremen818. Marketplaces we read that list it: 1 (Community GitHub marketplaces). 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 |  E2B |  ultracost |
|---|---|---|
| Docker MCP Catalog | Listed Version: sha256:ff4f9608cc4c Forks (GitHub): 72 Pulls (Docker Hub): 23 248 Stars (Docker Hub): 2 Stars (GitHub): 393 Not marked · First seen |
Not listed |
| Community marketplace davepoon/buildwithclaude | Not listed | Listed Version: 0.4.5 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 | E2B | ultracost |
|---|---|---|
| Marketplaces that list it | 1 | 1 |
| Stars (GitHub) (differs) | 393 (better) | 0 (worse) |
| Pulls (Docker Hub) (differs) | 23 248 | No figure on Docker Hub |
| Forks (GitHub) (differs) | 72 (better) | 0 (worse) |
| Last release | Not published | Not published |
| Where it runs (differs) | On your machine (mcp/e2b) | Installs as a plugin bundle |
| Transport (differs) | stdio | Not stated |
| Tools it declares (differs) | 1 | Not published |
| Environment variables it asks for (differs) | 1, secrets among them: 1 | Not published |
| Hooks it runs (differs) | Not published | 4 |
| Parts of the bundle (differs) | Not a bundle | 16 |
| Licence (differs) | Apache-2.0 | MIT |
| Repository (differs) | github.com/e2b-dev/mcp-server | github.com/danielkremen818/ultracost |
| Changes in the last 7 days (differs) | 0 | 2 |
| First seen (differs) | 2026-10-11 | 2026-10-15 |
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
E2B
Giving Claude ability to run code with E2B via MCP (Model Context Protocol).
ultracost
Per-stage model routing + pre-flight cost gate for Claude Code ultracode dynamic workflows. Pins an explicit model + effort on every agent subagent stage, estimates cost before launch, and ships a static guard + PreToolUse gate that flag stages which would silently inherit the session's Opus model. Zero dependencies, no telemetry, MIT.
How to run each
E2B As a local MCP server: Docker image
claude mcp add --env "E2B_API_KEY=<YOUR_E2B_API_KEY>" --transport stdio e2b -- docker run -i --rm -e E2B_API_KEY mcp/e2bRequires: E2B_API_KEY (secret)
ultracost As a Claude Code plugin
/plugin marketplace add davepoon/buildwithclaude
/plugin install ultracost@buildwithclaudeCommands built only from what the marketplaces declare; the full set for every client is on each card.
Tools each declares
The marketplaces of ultracost publish no list of tools, so we do not compare tools.
Settings each asks for
The marketplaces of ultracost publish no settings it asks for, so we do not compare settings.
What it can do: E2B · What it can do: ultracost · Compare two other plugins
Data comes from the Docker MCP Catalog (desktop.docker.com/mcp/catalog) and Docker Hub. Data comes from public marketplace files in GitHub repositories of their authors. Figures come from our own regular passes over the marketplaces, last read on . We publish no contact details for plugin publishers.