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Attest

io.github.dev-prathap/attestv0.1.0Other

Decide by policy, gate behind a human, verify by read-back, record a hash-chained ledger.

The current version, v0.1.0, was published to the official MCP registry on 2026-09-19. It is distributed as attestlayer on PyPI, filed under Other by this index, and declares 11 environment variables. Removals and unreachable sources are measured across every server this index tracks, contract drift across the servers that answer in consecutive snapshots; the index's current counts put this record in context.

In-path gate · all MCP tools

Using Attest in Claude, Cursor, Gemini CLI, Cline, or Zed?

MCP tool contracts can change remotely with no version bump. The mcpindex gate pins each contract and HOLDs the call when it drifts-before your agent acts. Zero credentials. This is not the package install for this server itself (use Install this server for that).

Install the mcpindex gate (one command)

Rewrites your MCP host config so each server launches behind the gate. Inspect first: curl -fsSL https://mcpindex.ai/install.sh | less

uv tool install mcpindex-gate && mcpindex-config-wire
Auditable install path →Watch it hold a drift →
Trust verdict · v1 advisory · method
NOT YET SCREENEDno verdict on file

Verdict not yet evaluated for this tool. The semantic screen takes adversarial cases first; coverage rolls out as the corpus expands (15/150 labels to graduation). The deterministic conformance probe is built but has not yet run on the public corpus, so a recorded verdict here is REVIEW or UNVERIFIED, never a clearing ALLOW. Until a verdict is recorded, an agent should treat this tool as not-yet-cleared and fall back to its own checks. Method: the eval, four-state verdict, honest limits.

Own this server? Screen its description →

That verdict was true at screening time (snapshot 2026-09-19).

Contracts can change after screening, with no version bump. The gate pins Attest’s tool contracts on first sight and holds any silent change before your agent acts - the check that keeps being true on Tuesday.

See your first HOLD in 2 minutes →

Related: how to trust an MCP server · screen before install · silent contract drift

Environment variables
ATTEST_POLICY

Path to a policy YAML (defaults to ./attest.yaml or the built-in default)

ATTEST_LEDGER

Ledger SQLite path (default .attest/ledger.sqlite)

ATTEST_AUTO_APPROVE

Set to 1 to approve every confirm request (development only)

ATTEST_CONFIRM_TIMEOUT

Seconds attest_confirm waits for a human (default 900)

GMAIL_TOKEN
secret

Google OAuth access token with gmail.readonly — enables Gmail read-back

GOOGLE_TOKEN
secret

Google OAuth access token — enables Calendar / Drive / Docs / Sheets read-back

SLACK_BOT_TOKEN
secret

Slack bot token (xoxb-…) with channels:history, channels:read — enables Slack read-back

HUBSPOT_TOKEN
secret

HubSpot private-app token — enables HubSpot read-back

NOTION_TOKEN
secret

Notion integration token — enables Notion read-back

LINEAR_API_KEY
secret

Linear API key — enables Linear read-back

GRAPH_TOKEN
secret

Microsoft Graph token — enables Outlook / Teams read-back

MCP quality score · maturity, not trust · methodology
freshness
25
completeness
20
installability
25
documentation
15
stability
5
Alternatives in Other
AgentRoam
ai.agentroam/agentroam

Buy travel eSIMs, gift cards and mobile top-ups with crypto — user confirms before any order.

Authoryze
ai.authoryze/authoryze

Give your AI agent a spending limit: approval controls and single-use virtual cards.

Attest proxy
io.github.dev-prathap/attest-proxy

Zero-code proxy: policy, human gate, read-back and a hash-chained ledger for any MCP server.