MANDATE Credential Broker
https://mandate.nanocorp.app/mcp ↗
Description
MCP server for mandates, delegation, policy-gated execution, credential grants, and audit.
What our measurements say
MANDATE Credential Broker is a remote MCP server published at mandate.nanocorp.app. It has been probed 6 times since 9/12/2026. It answered in 6 of them (100.0%), a near-uninterrupted record. Median response time is 1,091 ms, a delay an agent will notice. It offers a narrow, focused set of 11 tools. On the protocol side it still runs 2025-11-25 and has not moved to the newer spec.
Agent readability score
Can an LLM agent pick the right tool here — names, descriptions and parameter clarity are assessed.
Agent readability score
Strengths
- Tool names use consistent verbs (mint, delegate, revoke) that align with their functional intent
- Parameters include required/optional metadata with clear type definitions
- Distinct separation between mandate management and credential broker tools
Weaknesses
- Several descriptions lack explicit use cases (e.g., 'mandate.delegate' doesn't explain when escalation is prohibited)
- Overlap between 'mandate.revoke' and 'broker.revoke-grant' creates potential ambiguity
- No error handling documentation in any tool descriptions
- Some tool names are too generic (e.g., 'verify-proof' doesn't specify proof type)
mandate.discover— Description doesn't explain when this tool is usedmandate.delegate— No clarification on escalation restrictionsbroker.register-credential— 'metadata' parameter lacks usage examplesbroker.use— Doesn't specify validation steps before executing actionsbroker.introspect-grant— No mention of revocation proof requirements
Verdict
Event narrative
Risk: low
Advice
Schema compliance
tools/list structure, inputSchema validity, and a functional smoke test — the components of the 0-100 score.
- tools/list schema valid
- inputSchema invalid: —
- Smoke test not run this round
- Cold-start: cold 189ms → warm 189ms (penalty 0ms)
Tools
Tools the server advertised in the latest measurement — measured, not catalog-claimed.
mandate.discoverReturns this self-describing tool manifest.
mandate.mintCreates an active human-granted mandate for an agent and records it to the hash-chained ledger.
mandate.delegateCreates a child mandate only when it is a no-escalation subset of the parent mandate.
mandate.authorize-actionSubmits an action through the Gateway and canonical Policy Engine; returns ALLOW, DENY, or REQUIRE_APPROVAL with ledger proof.
mandate.verify-proofRecords a proof payload hash and appends proof evidence to the hash-chained ledger.
mandate.revokeRevokes a mandate subtree and records the revocation to the hash-chained ledger.
broker.register-credentialinvalid schemaRegisters an opaque vault handle/reference only; plaintext secret fields are rejected and never ledgered.
vault_handlestringrequiredmetadataobject
broker.request-accessAsks the canonical Policy Engine for an ALLOW decision before issuing a short-lived HMAC-sealed grant bound to credential, mandate, agent, scope, and expiry.
broker.useRedeems a sealed grant for the bound acting agent and executes the bound action through the Gateway and Policy Engine; does not expose plaintext secrets.
broker.revoke-grantRevokes a broker grant by id and records the revocation to the ledger.
broker.introspect-grantValidates a grant token seal, reports active/revoked/expired state, and records introspection to the ledger.
Availability history
Event log
Derived by comparing consecutive probes — changes in era, protocol version, build and reachability.
- Added to watch — era: Legacy
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