AgenticRail Gate - sequence enforcement and verifiable audit receipts for AI ag…

Name: AgenticRail Gate - sequence enforcement and verifiable audit receipts for AI ag…
Author: MSMD-RUA

by MSMD-RUAversion 1.3.0i★ –iRuns in the cloud

Registry namenz.agenticrail/gate

Install

Overview

Description from the maker (original English)

Deterministic runtime enforcement of step order for AI agents: ALLOW/DENY before a step runs.

PopNx MCP’s three pillars

These three are never merged into one score: opinions, measurements and popularity are different things.

User voiceiNo reviews yetReviews open together with accounts in a later step
Our basic checksi1 of 1 passedChecked from public information; code not scanned yet
UsageiNot measured yet★ –

What you can do with it

We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.

Connection: Runs in the cloud
Transport: Streamable HTTP
Category: Other

Install

Pick the AI app you use, then copy the settings.

Before you install

Basic checks: 1 of 1 passed
Runs on the maker’s server: what you ask it goes through their server.
The registry lists no key to fill in.

You need

Runs in the cloudNothing to install; it connects over the internet

Which app do you use?

ClaudeClaude CodeCursorVS CodeChatGPT

Pick your app above. We remember it, so next time the button says “Install in …”.

Works in Claude on the web, desktop and mobile:

Open Settings → Connectors
Press Add custom connector
Paste the address below and press Add
If it asks you to sign in, sign in with the maker

https://mcp.agenticrail.nz/

Run this in your terminal

claude mcp add --transport http gate https://mcp.agenticrail.nz/

Open in Cursor

Or copy the settings yourself

Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json

{
  "mcpServers": {
    "gate": {
      "url": "https://mcp.agenticrail.nz/"
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

Open in VS Code

Or copy the settings yourself

Paste into .vscode/mcp.json in your project

{
  "servers": {
    "gate": {
      "type": "http",
      "url": "https://mcp.agenticrail.nz/"
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

ChatGPT connects only to servers on the internet:

Open ChatGPT on the web → Settings → Connectors (Apps)
Press Create or Add (some plans need Developer mode under Advanced first)
Paste the address below, give it a name and save
If it asks you to sign in, sign in with the maker

https://mcp.agenticrail.nz/

Menu names can differ slightly by plan and over time.

Your choice stays on this device in a cookie; no account needed.

These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.

What it can do

We have not read this server’s tool list yet; we check endpoints in rotation.

Basic checksi

We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 7, 2026

✓ Pass
Maker matches the repo
The registry name was verified against the domain agenticrail.nz (the registry checks domain ownership)
… Not checked yet
Still maintained
We have not read this repo from GitHub yet
… Not checked yet
Has a licence
We have not read this repo from GitHub yet
… Not checked yet
Endpoint responds
Not checked yet; we check endpoints in rotation
… Not checked yet
Sign-in with OAuth
Not checked yet; we check endpoints in rotation
… Not checked yet
No hidden instructions in tool descriptions
Not checked yet; we read the tool list when we check the endpoint

Compared with others in Otheri

More stars than 0% of the other 32680 servers in this category
Published to the registry more recently than 49% of the other 32680 servers in this category
Basic checks equal to or better than 100% of the other 32680 servers in this category

Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.

Common questions

Is AgenticRail Gate - sequence enforcement and verifiable audit receipts for AI ag… safe?

It passed 1 of 1 applicable basic checks. We have not read the code. Before adding a key or token, see what access the server asks for and use a key with only the permissions you need.

What keys or codes does it need?

The registry does not list a required key, though some servers ask you to sign in on first use.

Does it run on my computer or in the cloud?

It runs in the maker’s cloud. Connect over the internet with nothing to install, but what you send passes through the maker’s servers.

Is it still maintained?

The GitHub repo last changed –, and the latest version (1.3.0) reached the registry 41 days ago.

Which apps can use it?

Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. It connects by URL, so apps that accept remote MCP servers work too, such as ChatGPT in developer mode.

What can I use instead?

In the same category: Spec Driven Development, Remote Desktop Commander, EmbeddedCI BenchPod

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README from the maker

Open the README

Copied from the maker’s repo as written. PopNx MCP has not reviewed or endorsed it. HTML, images and scripts are removed. Links lead off this site.

agenticrail-mcp

A Model Context Protocol server that exposes the live AgenticRail enforcement gate to any MCP client as two tools.

AgenticRail is a deterministic enforcement layer for AI agents: it holds an agent to its declared step order, refuses replays and skipped steps, and seals each completed sequence with a signed receipt. This server is the MCP adapter in front of it.

In the words the problem usually gets asked in: it is a policy enforcement point for AI agent tool calls. It catches skipped steps and procedural hallucination (an agent reporting success on a step that never ran) by refusing the out-of-order step before it runs, and every decision, ALLOW or DENY, becomes a tamper-evident audit trail entry.

Endpoint: https://mcp.agenticrail.nz/ (Streamable HTTP, stateless) Protocol: 2026-07-28 — the revision that retired the initialize exchange and Mcp-Session-Id. This server was built stateless with neither, so it needed no migration. initialize is still answered for older clients. Registry: nz.agenticrail/gate on the official MCP registry

Tools

Tool	What it does	Calls
`evaluate_step`	ALLOW/DENY a single agent step before it runs; seals a signed receipt	`POST https://api.agenticrail.nz/v1/evaluate`
`verify_receipt`	Fetch a sequence's verification report; confirm the receipt chain is intact	`POST https://report.agenticrail.nz/report`

Call evaluate_step before running each step of a sequence, and do not run a step the gate DENYs.

A DENY tells you how to fix it

Every refusal carries its own remedy in the response envelope — unsigned, DENY-only, because it describes the sequence's state now rather than the decision that was made:

refusal	what comes back
`ACTION_NOT_ALLOWED`	`allowed_action_types` — exactly what this step would have accepted
`SEQUENCE_VIOLATION`	`next_expected_step` — the step the sequence is waiting for
`STEP_ORDER_MISMATCH`	`locked_step_order` — the order this sequence was locked to on its first call
`UNKNOWN_STEP`	`expected_step_order` + `step_order_source` (`caller` or `msmd_spine`)

action_type is an enum of exactly eight values, and each step accepts only a subset. The enum in the tool schema is a hint, not a control — it binds only a client that validates its own arguments, and an invented verb is by far the most common first refusal: READ, QUERY, TOOL_CALL, LOOKUP, EXECUTE and the like are not action types, however well they describe your step. The gate is the control. When it refuses, allowed_action_types comes back carrying the ones this step would have taken.

A refused call locks nothing. A denial is answered before the sequence store is written to, so the run is not spoiled: the call was wrong, not the sequence. Correct the field the denial names and send the step again. The lock is set only by actually *sending* a step_order on a call that is allowed; from then on that list is enforced and a different one is refused with STEP_ORDER_MISMATCH. Omitting step_order sets no lock at all — it means only that this call is judged against the built-in MSMD spine, whose step names are almost certainly not yours.

So if your process has its own step names, send `step_order` with those names and the gate will enforce your order instead. One step is a valid sequence.

Connect

In Claude Code:

# zero config — uses the public demo key

claude mcp add --transport http agenticrail https://mcp.agenticrail.nz/

with your own key

claude mcp add --transport http agenticrail https://mcp.agenticrail.nz/ \ --header "Authorization: Bearer "

Any Streamable-HTTP MCP client works — point it at the URL.

Try it without installing anything

BASE=https://mcp.agenticrail.nz/

curl -s -X POST "$BASE" -H 'content-type: application/json' \ -d '{"jsonrpc":"2.0","id":1,"method":"tools/list"}' | jq .

⚠️ Use a sequence_id nobody else will pick. On the shared demo key the id is

GLOBAL and sealing is PERMANENT — a fixed one in an example works once for one

person on earth and returns SEALED_SEQUENCE for everyone after.

SEQ="mcp-smoke-$(date +%s)-$RANDOM"

curl -s -X POST "$BASE" -H 'content-type: application/json' \ -d "{\"jsonrpc\":\"2.0\",\"id\":2,\"method\":\"tools/call\",\"params\":{ \"name\":\"evaluate_step\", \"arguments\":{\"sequence_id\":\"$SEQ\",\"step\":\"intake\", \"action_type\":\"CHECK_STATE\"}}}" | jq .

With no Authorization header the public demo key is used and your sequence_id comes back rewritten to `demo-mcp- ` — demo- marks the public lane, mcp- marks it as anonymous MCP traffic. Use the id returned in the response from then on; the one you sent will not resolve. This is intended, not a leak.

A `demo-` sequence's report needs no key to read, so treat anything you send on it as public.

Design — read before changing

Protocol adapter only. This worker holds no internal secrets and has no privileged path to the enforcement core. It calls the same public API an external caller uses, so the tool logic is decoupled from AgenticRail's internals *and* from the MCP transport version.
Service bindings, not fetch. mcp.agenticrail.nz is on the same zone as api. and report., so a plain fetch() would be a same-zone loopback (Cloudflare error 1002). The bindings hit the identical public handlers — they are not an internal bypass.
Stateless Streamable HTTP. No Mcp-Session-Id is issued or required; every POST is self-contained. The transport shell is handleRpc + the fetch handler — the only part a spec revision touches. The value-bearing calls (callEvaluate / callVerify) are plain HTTPS and don't change.
`GET /` serves the discovery card; every other GET path 404s. POST is left permissive on purpose so a client that appends a path to the endpoint URL still works.
**A 404 on /.well-known/oauth-* is correct** — it is how an MCP server says *no auth required*. agent.json, agent-card.json, x402 and ai-plugin.json are protocols this server does not implement; answering them would be a claim.

Deploy

npx wrangler deploy

AgenticRail Gate - sequence enforcement and verifiable audit receipts for AI ag…

Overview

PopNx MCP’s three pillars

What you can do with it

Install

Before you install

What it can do

Basic checksi

Maker matches the repo

Still maintained

Has a licence

Endpoint responds

Sign-in with OAuth

No hidden instructions in tool descriptions

Compared with others in Otheri

Common questions

Alternatives

Spec Driven Development

Remote Desktop Commander

EmbeddedCI BenchPod

README from the maker

agenticrail-mcp

Tools

A DENY tells you how to fix it

Connect

with your own key

Try it without installing anything

⚠️ Use a sequence_id nobody else will pick. On the shared demo key the id is

GLOBAL and sealing is PERMANENT — a fixed one in an example works once for one

person on earth and returns SEALED_SEQUENCE for everyone after.

Design — read before changing

Deploy

Links