ProofGraph (Antigravity MCP) vs Fact Verification MCP
ProofGraph (Antigravity MCP) is an MCP server published by AI-BuildInfra. Marketplaces we read that list it: 1 (Official MCP Registry). Fact Verification MCP is an MCP server published by FoundryNet. Marketplaces we read that list it: 1 (Official MCP Registry). As of our marketplace pass on 2026-10-15. 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 |  ProofGraph (Antigravity MCP) | |
|---|---|---|
| Official MCP Registry | Listed Version: 1.0.0 Forks (GitHub): 0 Stars (GitHub): 1 Not marked · First seen |
Listed Version: 1.0.0 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 | ProofGraph (Antigravity MCP) | Fact Verification MCP |
|---|---|---|
| Marketplaces that list it | 1 | 1 |
| Stars (GitHub) (differs) | 1 | No figure on GitHub |
| Forks (GitHub) (differs) | 0 | No figure on GitHub |
| Last release | Not published | Not published |
| Where it runs (differs) | Not stated | Remote server (fact-check-mcp-production.up.railway.app/mcp) |
| Transport (differs) | Not stated | Streamable HTTP |
| Tools it declares | Not published | Not published |
| Environment variables it asks for | Not published | Not published |
| Licence | Not stated | Not stated |
| Repository (differs) | github.com/ai-buildinfra/proof-graph | github.com/foundrynet/fact-check-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 | Not responding since 2026-10-12 |
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
ProofGraph (Antigravity MCP)
Evidence-first entity and knowledge graph MCP server for AI agents to verify claims.
Fact Verification MCP
Verify claims with verdict, confidence & cited sources; batch verify, source checks, daily brief.
How to run each
ProofGraph (Antigravity MCP)
No data for an automatic command: what its marketplaces declare does not say unambiguously how to connect it.
Fact Verification MCP As a remote MCP server
claude mcp add --transport http fact-check-mcp https://fact-check-mcp-production.up.railway.app/mcpCommands built only from what the marketplaces declare; the full set for every client is on each card.
Only Fact Verification MCP 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: ProofGraph (Antigravity MCP) · What it can do: Fact Verification MCP · 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.