vulcan vs Priors
vulcan is a plugin bundle for AI coding tools published by Ellipsis-Labs. Marketplaces we read that list it: 1 (Claude Code: claude-plugins-community). Priors is an MCP server published by priors-agents. 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 |  vulcan |  Priors |
|---|---|---|
| Claude Code: claude-plugins-community | Listed Version: 0.5.0 Forks (GitHub): 6 Stars (GitHub): 20 Not marked · First seen |
Not listed |
| Official MCP Registry | Not listed | Listed Version: 0.9.3 Downloads/month (npm): 6 709 Downloads/week (npm): 2 721 Forks (GitHub): 6 Stars (GitHub): 5 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 | vulcan | Priors |
|---|---|---|
| Marketplaces that list it | 1 | 1 |
| Stars (GitHub) (differs) | 20 (better) | 5 (worse) |
| Forks (GitHub) | 6 | 6 |
| Last release (differs) | Not published | 2026-10-14 |
| Where it runs (differs) | Installs as a plugin bundle | On your machine (@priors/mcp) |
| Transport (differs) | Not stated | stdio |
| Tools it declares | Not published | Not published |
| Environment variables it asks for (differs) | 2, secrets among them: 1 | 9, secrets among them: 1 |
| Parts of the bundle (differs) | 21 | Not a bundle |
| Licence (differs) | MIT | Not stated |
| Repository (differs) | github.com/ellipsis-labs/vulcan-cli | github.com/priors-agents/priors |
| Changes in the last 7 days (differs) | 0 | 5 |
| First seen (differs) | 2026-10-12 | 2026-10-11 |
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
vulcan
Agent and human-friendly CLI for trading Phoenix perpetual futures on Solana.
Priors
Pay x402 APIs in USDG on Robinhood Chain, borrow and repay a Priors credit line, check records.
How to run each
vulcan As a Claude Code plugin
/plugin marketplace add anthropics/claude-plugins-community
/plugin install vulcan@claude-communityPriors As a local MCP server: npm package
claude mcp add --env "PRIORS_KEY=<YOUR_PRIORS_KEY>" --transport stdio priors -- npx -y @priors/mcpRequires: PRIORS_KEY (secret)
Commands built only from what the marketplaces declare; the full set for every client is on each card.
Tools each declares
Neither one's marketplaces publish a list of tools, so there is nothing to compare.
Settings each asks for
Only vulcan asks for
VULCAN_WALLET_NAMEVULCAN_WALLET_PASSWORD (secret)
Only Priors asks for
PRIORS_AGENT_IDPRIORS_KEY (secret)PRIORS_KEY_FILEPRIORS_MAX_BORROW_DAY_USDPRIORS_MAX_BORROW_USDPRIORS_MAX_PRICE_USDPRIORS_MAX_SPEND_DAY_USDPRIORS_MAX_SPEND_USDPRIORS_PAY_HOSTS
Settings as each marketplace publishes them. Asking for fewer is not better in itself.
What it can do: vulcan · What it can do: Priors · Compare two other plugins
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.