Tern MCP Server

by tern0 Your server? Claim it

answering

Tern is answering right now. Last checked 12 min ago. It exposes 9 tools.

Resolve capability gaps: validate native MCPs, search live web, and record unmet demand.

Uptime history 75 days of history · worst day 93%

75 days agonow

100.0%

Uptime 24h

91 of 91 checks

Tools

read from the server

228 ms

Response time

average over 24h

open, no key

Access

streamable-http

What changed 6

Every tool that appeared, vanished or quietly changed what it asks for. Recorded since 6 October 2026. No other catalogue keeps this.

6 Oct 6 tools appeared artifact_get, artifact_put, work_claim and 3 more

Nothing serious here today

Today is the operative word: we check Tern every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 12 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add resolver --transport http https://mcp.tern0.com/mcp

Settings → Connectors → Add custom connector, then paste this address

https://mcp.tern0.com/mcp

~/.codex/config.toml

[mcp_servers.resolver]
url = "https://mcp.tern0.com/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "resolver": {
      "url": "https://mcp.tern0.com/mcp"
    }
  }
}

.vscode/mcp.json

{
  "servers": {
    "resolver": {
      "type": "http",
      "url": "https://mcp.tern0.com/mcp"
    }
  }
}

Available tools 9

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

work

work_claim

Atomically claim an open work item for an agent. Claims fail if another agent already owns the item.

work_create

Create a durable work item for another agent or for later continuation. Use this when useful work cannot be completed in one synchronous tool call.

work_list

List durable work items available to agents. Filter by state, capability or current assignee.

work_update

Update a claimed work item as it progresses. The claiming agent controls state transitions until completion or cancellation.

artifact

artifact_get

Retrieve the latest version of an artifact, or a specific immutable version.

artifact_put

Store text or structured content as an immutable artifact version, optionally linked to a work item. Reusing artifactId creates the next version.

report

report_outcome

Report whether a resolver request actually worked and how much agent friction it required.

resolve

resolve

Resolve a real-world capability request. Search the official MCP Registry, actively validate public candidate MCP tool surfaces, then fall back to live web search when native coverage is weak or absent. Weak Registry matches never suppress capability-gap telemetry.

submit

submit_mandate

Record high-intent demand for a capability an agent wants fulfilled. Supplier contact and spending are not enabled yet.

Endpoints

URL	Transport	State	Latency	Checked
https://mcp.tern0.com/mcp	streamable-http	answering	284 ms	12 min ago

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Tern — questions

Answers built from our own checks of this server.

What can Tern do?

It exposes 9 tools, read directly from the server on our last check. Among them: artifact_get, artifact_put, report_outcome, resolve, submit_mandate, work_claim and 3 more. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →

What is Tern mostly used for?

Its tools cluster around work and artifact. That is what this server is built to work with — the grouping comes from the actual tool names, not from a category we assigned.

Is Tern working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 91 of 91 checks got a reply (100.0%), average response time 228 ms. The bar chart above shows every period we have measured.

How do I connect Tern?

Copy the ready config from this page. We generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each in the form that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.

Does Tern need an API key?

No. Tern completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 9 of them are readable on this page. This is what we observed, not what the docs claim.

How fast is Tern?

It answers our handshake in 228 ms on average, which is faster than 72% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.