workflow-builder vs Server4Agent
workflow-builder is a plugin bundle for AI coding tools published by Alireza Rezvani. Marketplaces we read that list it: 1 (Community GitHub marketplaces). Server4Agent is an MCP server published by server4agent.com. 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 | ||
|---|---|---|
| Community marketplace alirezarezvani/claude-skills | Listed Version: 1.0.0 Forks (GitHub): 3 996 Stars (GitHub): 28 271 Not marked · First seen |
Not listed |
| Official MCP Registry | Not listed | Listed Version: 1.0.3 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 | workflow-builder | Server4Agent |
|---|---|---|
| Marketplaces that list it | 1 | 1 |
| Stars (GitHub) (differs) | 28 271 | No figure on GitHub |
| Forks (GitHub) (differs) | 3 996 | No figure on GitHub |
| Last release (differs) | Not published | 2026-10-13 |
| Where it runs (differs) | Installs as a plugin bundle | Remote server (mcp.server4agent.com) |
| Transport (differs) | Not stated | Streamable HTTP |
| Tools it declares | Not published | Not published |
| Environment variables it asks for | Not published | Not published |
| Parts of the bundle (differs) | 3 | Not a bundle |
| Licence (differs) | MIT | Not stated |
| Repository (differs) | github.com/alirezarezvani/claude-skills | Not stated |
| Changes in the last 7 days (differs) | 2 | 3 |
| First seen (differs) | 2026-10-14 | 2026-10-11 |
| Endpoint at the last check (differs) | no remote endpoint we check | Responded 6 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
workflow-builder
Workflow-builder skill: design and write deterministic multi-agent workflow scripts (.js files in .claude/workflows/) for Claude Code's Workflow tool (CLAUDE_CODE_WORKFLOWS=1, /workflows). Every session opens with an intake question set; when the user is vague, a stdlib recommendation engine infers and proposes a topology with rationale instead of stalling. Ships 3 stdlib Python tools (intake recommendation engine, .js validator enforcing pure-literal-meta / no-non-determinism / guarded-loop / parallel-thunk rules, topology scaffolder), 3 references citing 7-8 authoritative sources each (API surface, orchestration patterns, decision + intake guide), templates + a runnable example, cs-workflow-architect persona agent + /cs:workflow-build slash command. Use when building, scaffolding, or running a custom Claude Code workflow or orchestrating sub-agents (fan-out, pipeline, loop, judge-panel).
Server4Agent
Turn plain-English goals into hosted tools and agents with live URLs. Budget-capped, private.
How to run each
workflow-builder As a Claude Code plugin
/plugin marketplace add alirezarezvani/claude-skills
/plugin install workflow-builder@claude-code-skillsServer4Agent As a remote MCP server
claude mcp add --transport http server4agent https://mcp.server4agent.com --header "X-API-Key: <YOUR_X_API_KEY>"Requires: X-API-Key header
Commands built only from what the marketplaces declare; the full set for every client is on each card.
Only Server4Agent 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: workflow-builder · What it can do: Server4Agent · Compare two other plugins
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.