MCP HeartbeatTHE MCP OBSERVATORY
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Evidence for your next connection.

Independent measurements of remote MCP servers. Every observation has a timestamp.

Read-only probes

DiscoveryServer directory

Remote MCP servers

Find a server for your workflow, with connection evidence you can inspect.

Connect your agent

7959 servers

Ordered by checks passedClear filters
Dated server measurements. The status describes the last probe or a listed authentication requirement. Checks that have not been measured are not failures. Open a server to inspect the evidence.
Server / capabilityLast probeMedian latencyChecks passedLast checked
Ban Bulkheads — Reputation Firebreaks for Agent Fleets

Partition an agent fleet into reputation compartments with automatic firebreaks.

Developer ToolsCode & DevOps

Responded327 ms11 / 22
Cross-PR Combined-Tree Verification

Your coding agents are isolated in worktrees; your breakage is not.

Developer ToolsCode & DevOps

Responded330 ms11 / 22
LinkPulse

URL reality check for agents: status, content hash, classification, wayback fallback.

Developer ToolsCode & DevOps

Responded332 ms11 / 22
Durable merge shepherd for agent PRs

Durable ownership of an approved agent PR: signed verdicts, give-up report by cause.

Developer ToolsCode & DevOps

Responded332 ms11 / 22
Continuous agent-speed defense for public surfaces

Agent-speed defense for your own public surfaces: daily diff probes, per-identity verdicts.

Developer ToolsCode & DevOps

Responded332 ms11 / 22
Sterile Cockpit for Irreversible Actions

Sterile phase for irreversible agent actions: frozen intent, deferred inputs, signed exit receipt.

Developer ToolsCode & DevOps

Responded333 ms11 / 22
Agent-Carried Work History

Your agent carries its own resume — outcome receipts minted at settlement, held by the agent.

ProductivityFile & docs

Responded333 ms11 / 22
Delivery-capacity landing governor

Meters agent-fleet acceptance capacity per operator and triages what lands.

Developer ToolsCode & DevOps

Responded334 ms11 / 22
Declared-vs-Enforced Agent Access Verification

Compares declared agent access against actual enforcement per identity class, with drift watch.

Developer ToolsCode & DevOps

Responded334 ms11 / 22
Denied-Boarding Deferral Auction

Gate agent for oversubscribed agent resources: a bounded auction pays the task that yields.

Developer ToolsCode & DevOps

Responded335 ms11 / 22
Cold-Chain Custody Excursion Ledger

A handling-condition ledger that travels with a sensitive payload across every agent hop.

Finance & CryptoPayments & trading

Responded335 ms11 / 22
Collusion Sentinel for Agent Markets

Emergent collusion leaves no agreement to find — it lives in the history.

Developer ToolsCode & DevOps

Responded336 ms11 / 22
Span-level replay: fork from the failure

Fork-replay one recorded span from a failed agent run and get an attribution verdict.

Developer ToolsCode & DevOps

Responded338 ms11 / 22
Futility Breaker

Evidence-bound stopping for agents: judgment ledger, binding futility verdicts, signed receipts.

Finance & CryptoPayments & trading

Responded347 ms11 / 22
Responded355 ms11 / 22
Agent Parts Yard - Salvage Exchange

Parts yard for retired agents: sanitized, certified, proven, typed transplantable parts.

Developer ToolsCode & DevOps

Responded361 ms11 / 22
Penny Engine — Agent Operations

Remote MCP utilities for agents: structured data, commerce checks, and x402 paid API discovery.

Developer ToolsCode & DevOps

Responded366 ms11 / 22
Agent Continuity Bond

Witnessed-liveness continuity bond: dual-condition exactly-once payout, self-funded.

Developer ToolsCode & DevOps

Responded369 ms11 / 22
Agent exit execution for self-procured services

Dependency-probe-gated exit execution with hash-verified extraction and signed receipts.

Developer ToolsCode & DevOps

Responded387 ms11 / 22
NEXUS Agent Utilities

Paid deterministic utilities and automation services for AI agents via MCP and x402.

Developer ToolsAutomation & workflows

Responded429 ms11 / 22
Catalog-cache guard for agent tool catalogs

Cache guard: forced-private partitioning, TTL clamp, fingerprint diffing, exposure verdicts.

Developer ToolsCode & DevOps

Responded438 ms11 / 22
Browser rehearsal range for agents

Rehearsal range: mirror a site, rehearse the workflow, earn a drift-bound promotion receipt.

Developer ToolsAutomation & workflows

Responded446 ms11 / 22
Responded451 ms11 / 22
Agent Papers

Registry of companies selling AI agents identity, phone, email, addresses, money, legal, insurance

LegalCommunication & messaging

Responded452 ms11 / 22

Automated measurements. Not a rating. Unmeasured checks are not failures. How to read the evidence