AgentGuard

io.github.MerchantGuard/agentguardv0.3.1Other

Local spend caps, kill-switch blocking and Ed25519-signed receipts for AI agent tool calls.

The current version, v0.3.1, was published to the official MCP registry on 2026-09-21. It is distributed as @agentguard-run/mcp on npm, filed under Other by this index, and declares 21 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 AgentGuard 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 2026-09-22).

Contracts can change after screening, with no version bump. The gate pins AgentGuard’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 →

Environment variables

AGENTGUARD_MCP_DAILY_CAP_CENTS

Local daily spend cap in cents. A nonnegative integer.

AGENTGUARD_MCP_PER_CALL_CAP_CENTS

Local per-call spend cap in cents. A nonnegative integer.

AGENTGUARD_MCP_TENANT

Tenant identifier stamped into local receipts.

AGENTGUARD_HOME

Local signing-key, configuration and ledger directory. Defaults to .agentguard in the operating system home directory.

AGENTGUARD_MCP_LEDGER

Local decision storage. ndjson persists receipts across restarts; memory retains this process only.

AGENTGUARD_MCP_DISABLE_COST_OVERRIDE

Set to 1 to discard and prevent model pricing overrides for this server.

AGENTGUARD_LOCK_COST_OVERRIDES

Spend SDK startup lock. Set to 1 to prevent model pricing overrides.

AGENTGUARD_ACTOR_DIGEST

Set to 1 to hash actor identifiers before they enter local receipts.

AGENTGUARD_LICENSE_KEY

secret

Optional AgentGuard license key for license validation and seat registration. Otherwise read from local configuration.

AGENTGUARD_LICENSE_ENDPOINT

License and seat service base URL. No prompts, tool content or receipts are sent.

AGENTGUARD_NO_BEACON

Set to 1 to disable optional activation telemetry regardless of saved consent.

AGENTGUARD_TELEMETRY

Set to 1 to opt in to content-free activation telemetry. Otherwise saved consent applies, default off.

AGENTGUARD_INSTALL_ID

Optional identifier used only by opted-in activation telemetry when no saved install identifier exists.

AGENTGUARD_ANONYMOUS_INSTALL_ID

Legacy fallback for AGENTGUARD_INSTALL_ID in opted-in activation telemetry.

CI