Agent Output Verifier by SarnAI vs ProofStream
Agent Output Verifier by SarnAI is an MCP server published by sarnai.dev. Marketplaces we read that list it: 1 (Official MCP Registry). ProofStream is an MCP server published by ProofStreamai. Marketplaces we read that list it: 1 (Official MCP Registry). As of our marketplace pass on 2026-10-21. 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 |   Agent Output Verifier by SarnAI | |
|---|---|---|
| Official MCP Registry | Listed Version: 0.5.7 Forks (GitHub): 0 Stars (GitHub): 0 Not marked · First seen |
Listed Version: 0.1.1 Downloads/month (npm): 130 Downloads/week (npm): 31 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 | Agent Output Verifier by SarnAI | ProofStream |
|---|---|---|
| Marketplaces that list it | 1 | 1 |
| Stars (GitHub) (differs) | 0 | No figure on GitHub |
| Forks (GitHub) (differs) | 0 | No figure on GitHub |
| Last release (differs) | 2026-10-14 | Not published |
| Where it runs (differs) | Remote server (verify.sarnai.dev/mcp) | On your machine (proofstream-mcp) |
| Transport (differs) | Streamable HTTP | stdio |
| 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/sarnai-dev/agent-output-verifier | Not stated |
| Changes in the last 7 days | 0 | 0 |
| First seen | 2026-10-11 | 2026-10-11 |
| Endpoint at the last check (differs) | Responded 5 days ago | no remote endpoint we check |
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
Agent Output Verifier by SarnAI
Independent schema and rule check of AI agent output before you pay. Signed attestation and receipt.
ProofStream
Dispatch a human verifier to physically verify anything in the real world. For AI agents.
How to run each
Agent Output Verifier by SarnAI As a remote MCP server
claude mcp add --transport http agent-output-verifier https://verify.sarnai.dev/mcpProofStream As a local MCP server: npm package
claude mcp add --transport stdio proofstream-mcp -- npx -y proofstream-mcpCommands built only from what the marketplaces declare; the full set for every client is on each card.
Only Agent Output Verifier by SarnAI has a remote endpoint we check. How we check endpoints
Tools each declares
Neither the marketplaces of ProofStream nor its endpoint list any tools, so we do not compare tools.
Settings each asks for
Neither one's marketplaces publish the settings it asks for.
What it can do: Agent Output Verifier by SarnAI · What it can do: ProofStream · 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.