Declared-vs-Enforced Agent Access Verification vs Assay A2A, MCP & x402 Pre-Flight Verifier & Observatory
Declared-vs-Enforced Agent Access Verification is an MCP server published by textforagents.com. Marketplaces we read that list it: 1 (Official MCP Registry). Assay A2A, MCP & x402 Pre-Flight Verifier & Observatory is an MCP server published by agentdiet.dev. Marketplaces we read that list it: 1 (Official MCP Registry). As of our marketplace pass on 2026-10-27. 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 |  Assay A2A, MCP & x402 Pre-Flight Verifier & Observatory | |
|---|---|---|
| Official MCP Registry | Listed Version: 1.0.0 No figure published Not marked · First seen |
Listed Version: 7.0.17 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 | Declared-vs-Enforced Agent Access Verification | Assay A2A, MCP & x402 Pre-Flight Verifier & Observatory |
|---|---|---|
| Marketplaces that list it | 1 | 1 |
| Stars (GitHub) (differs) | No figure on GitHub | 0 |
| Forks (GitHub) (differs) | No figure on GitHub | 0 |
| Last release (differs) | Not published | 2026-10-21 |
| Where it runs (differs) | Remote server (textforagents.com/products/declared-vs-enforced-agent-access-verification/mcp) | Remote server (assay.agentdiet.dev/mcp) |
| Transport | Streamable HTTP | 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) | Not stated | github.com/robertoyanguas-ops/assay |
| Changes in the last 7 days (differs) | 0 | 2 |
| First seen (differs) | 2026-10-20 | 2026-10-19 |
| Endpoint at the last check (differs) | Answered with HTTP 404 (14 h ago) | Responded 46 h ago |
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
Declared-vs-Enforced Agent Access Verification
Compares declared agent access against actual enforcement per identity class, with drift watch.
Assay A2A, MCP & x402 Pre-Flight Verifier & Observatory
Live behavioral security verifier, schema auditor, and trust oracle for A2A, MCP & x402 agents.
How to run each
Declared-vs-Enforced Agent Access Verification As a remote MCP server
claude mcp add --transport http declared-vs-enforced-agent-access-verifi https://textforagents.com/products/declared-vs-enforced-agent-access-verification/mcpAssay A2A, MCP & x402 Pre-Flight Verifier & Observatory As a remote MCP server
claude mcp add --transport http assay https://assay.agentdiet.dev/mcpCommands built only from what the marketplaces declare; the full set for every client is on each card.
Only the endpoint of Assay A2A, MCP & x402 Pre-Flight Verifier & Observatory responded at the last daily 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: Declared-vs-Enforced Agent Access Verification · What it can do: Assay A2A, MCP & x402 Pre-Flight Verifier & Observatory · 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.