<strong>The open, recomputable evidence profile for privileged MCP tool actions.</strong>
Assay MCP server is a hosted integration for AI assistants that speak the Model Context Protocol. The open, recomputable evidence profile for privileged MCP tool actions..
Once Assay is connected, these are the calls the assistant has available:
Positioning — ADR-033 · RFC-005Output — What it isAttestation — Export a bundle as an in-toto / DSSE statement (v0), anchor-pluggableDeterministic — Same input, same decision — not probabilisticOffline-first — No backend required for core enforcement and bundle verificationQuickstart — mkdir -p /tmp/assay-demo && echo "safe content" > /tmp/assay-demo/safe.txt assay mcp wrap --policy examples/mcp-quickstart/policy.yaml \ -- npxBeing a remote server, there is no local install. You register the endpoint with your client, authorise it once, and the tools appear.
Among the developer tooling options, the useful question is rarely "what can it do" but "what does it cost you to run" — permissions, credentials, and how much of your context its toolset consumes. Assay's toolset — Positioning, Output, Attestation and 3 more — is a fair guide to whether it matches your workflow. It is maintained by rul1an; worth a glance at recent repository activity before you build anything load-bearing on it.
SyncDev reviews every entry in this directory against the project's own documentation before publishing, and revisits them as servers change.
| Tool | What it does |
|---|---|
| Positioning | [ADR-033](docs/architecture/ADR-033-OTel-Trust-Compiler-Positioning.md) · [RFC-005](docs/architecture/RFC-005-trust-compiler-mvp-2026q2.md) |
| Output | What it is |
| Attestation | Export a bundle as an in-toto / DSSE statement (v0), anchor-pluggable. |
| Deterministic | Same input, same decision — not probabilistic. |
| Offline-first | No backend required for core enforcement and bundle verification. |
| Quickstart | mkdir -p /tmp/assay-demo && echo "safe content" > /tmp/assay-demo/safe.txt assay mcp wrap --policy examples/mcp-quickstart/policy.yaml \ -- npx @modelcontextprotocol/server-filesystem /tmp/assay-demo |
{
"mcpServers": {
"assay": {
"command": "npx",
"args": ["-y", "@modelcontextprotocol/server-filesystem"]
}
}
}Add to claude_desktop_config.json, then restart Claude Desktop.
Kill hallucinated APIs — version-accurate, up-to-date library documentation injected straight into context.
Microsoft's official browser automation server — drive a real browser through the accessibility tree, no screenshots needed.
GitHub's official server — repos, issues, pull requests, Actions and code security, straight from your assistant.
Issue tracking at the speed of conversation — Linear's official hosted server with OAuth and zero install.
Local repository surgery — status, diffs, commits, branches and history for any repo on disk.
Timezone sanity for AI — current time anywhere and correct conversions, without the model doing date math.