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opchain MCP Server

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opchain is answering right now. Last checked 12 min ago. It exposes 7 tools. Last commit 31 Oct 2026.

Claude Code / MCP skills for the dev pipeline: discover, spec, design, build, ship, operate.

Uptime history 91 days of history · worst day 90%
91 days agonow
100.0%
Uptime 24h
91 of 91 checks
7
Tools
read from the server
134 ms
Response time
average over 24h
0
Stars
last commit 31 Oct 2026

What changed 17

Every tool that appeared, vanished or quietly changed what it asks for. Recorded since 27 August 2026. No other catalogue keeps this.

19 Sep a tool changed version
17 Sep a tool changed version
15 Sep a tool changed version
14 Sep a tool changed version2 times that day
14 Sep a tool description was rewritten write_checkpoint
14 Sep a tool changed the parameters it asks for write_checkpoint
5 Sep a tool changed version
2 Sep 2 tools changed the parameters they ask for read_checkpoint, write_checkpoint
2 Sep a tool appeared create_checkpoint_session
2 Sep a tool description was rewritten read_checkpoint
and 6 more, back to 27 August 2026

What the code does

We read the source, 2 d ago · tools taken from the live server · rules 995398eba69f

Capabilities

What this server is able to do. For an MCP server this is often the job itself — a terminal server runs commands because that is what it is for. Listed so you know what you are plugging in, not as an accusation.

  const proc = spawn(binary, args, { stdio: ["ignore", "ignore", "pipe", "pipe", "pipe"], detached: true, env });
Builds a file path from a variable plugins/opchain/hooks/route-prompt.cjs:499
  const dir = path.isAbsolute(common) ? common : path.join(root, common);

Is this your server and something here is wrong? Tell us — corrections are free and do not require a plan.

This code can reach further than it looks

We found places where it runs commands, builds paths or queries from values it is given. None of that is a flaw by itself — it becomes one when the code changes, and code changes quietly between releases. We re-read it on every one.

Three servers free · no card

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.

run in your terminal
claude mcp add opchain-skills --transport http https://opchain.dev/mcp
Settings → Connectors → Add custom connector, then paste this address
https://opchain.dev/mcp
~/.codex/config.toml
[mcp_servers.opchain-skills]
url = "https://opchain.dev/mcp"
.cursor/mcp.json
{
  "mcpServers": {
    "opchain-skills": {
      "url": "https://opchain.dev/mcp"
    }
  }
}
.vscode/mcp.json
{
  "servers": {
    "opchain-skills": {
      "type": "http",
      "url": "https://opchain.dev/mcp"
    }
  }
}

This endpoint answered with an authorization challenge. The server is running, but it did not say what kind of credentials it expects.

Available tools 7

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

checkpoint
create_checkpoint_session
Create a private server-issued session for checkpoint storage. Retain the returned sessionId and use it with read_checkpoint/write_checkpoint; never invent or share one.
read_checkpoint
Read a skill's saved session checkpoint (where you left off). sessionId must be a private token returned by create_checkpoint_session.
write_checkpoint
Persist a skill's session checkpoint so progress survives across sessions. Stores the object as given (any JSON object up to 64 KiB); it does not validate it against the opchain checkpoint protocol, so write the shape the protocol documents.
orchestrator
get_orchestrator
Return the shared orchestrator protocol (welcome flow, pipeline map, active-chaining rules). Read once at the start of a session.
route
route
Map a request or an /oc-* command to the skill that should handle it, with the entry phase. Use when you're unsure which skill fits.
skill
get_skill
Return the full SKILL.md (the instructions) for one skill id. Load it, then follow it. Read get_orchestrator once before your first get_skill in a session.
skills
list_skills
List every opchain skill (id, displayName, description, phases, commands). Call this first to see the concept→ship pipeline.

Endpoints

URLTransportStateLatencyChecked
https://opchain.dev/mcp streamable-http needs auth 108 ms 12 min ago

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opchain — questions

Answers built from our own checks of this server.

What can opchain do?
It exposes 7 tools, read directly from the server on our last check. Among them: create_checkpoint_session, get_orchestrator, get_skill, list_skills, read_checkpoint, route and 1 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 →
Is opchain 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 134 ms. The bar chart above shows every period we have measured.
How do I connect opchain?
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. You will need your own credentials: it refuses anonymous clients.
Does opchain need an API key?
Yes. Every time we knock, opchain answers with an authorization challenge instead of its tool list — that is how we know it is running and gated rather than broken. Bring your own credentials and it will talk.
How fast is opchain?
It answers our handshake in 134 ms on average, which is faster than 86% of all working MCP servers we measure. That puts it in the quick quarter of the ecosystem. The comparison comes from our own checks across the whole registry, every 15 minutes.
Is opchain open source?
The code is open source: it is published under the Apache-2.0 licence, written in JavaScript, 0 stars on GitHub and 12 open issues. The licence covers the code in the repository, not the hosted service at opchain.dev, which runs on its operator's own terms.