How do I install Vessel?

Install Vessel in your harness: Codex — codex plugin marketplace add spenceclark/Vessel; Claude Code — /plugin marketplace add spenceclark/Vessel; MCP — git clone https://github.com/spenceclark/Vessel. Full step-by-step guidance is on the HOL plugin page.

How do I install Vessel in Codex?

To install Vessel in Codex, start with codex plugin marketplace add spenceclark/Vessel. The complete step-by-step install guide for Codex is on the HOL plugin page.

How do I install Vessel in Claude Code?

To install Vessel in Claude Code, start with /plugin marketplace add spenceclark/Vessel. The complete step-by-step install guide for Claude Code is on the HOL plugin page.

How do I install Vessel in MCP?

To install Vessel in MCP, start with git clone https://github.com/spenceclark/Vessel. The complete step-by-step install guide for MCP is on the HOL plugin page.

Vessel is listed as free on HOL.

How is the Trust Score for Vessel computed?

Vessel has a HOL Trust Score of 35 out of 100. The score is a weighted sum of six components from a static scan of the source, capped for high-severity findings and adjusted by two disclosed policies. Memberships and payments are not inputs, and a scan is not a safety guarantee. Full breakdown: https://hol.org/registry/plugins/spenceclark%2Fvessel/trust

Who publishes Vessel?

Vessel is published by spenceclark and listed on HOL.

Is Vessel available now?

Vessel is currently available according to its latest public launch.

Vessel

Local reverse proxy that records every request and response to models

spenceclark/vessel · v0.3.1 · Tools & Integrations

by spenceclarkOwner verifiedScan grade: unsafe

Local reverse proxy that records every request and response between agents and Ollama, OpenAI-compatible or Anthropic backends to SQLite for search, replay and comparison, with a read-only MCP server for Claude Code and other MCP clients

Install Source

Follow0

Trust Score35 Security scan24 Components1

Protect this install with HOL Guard

Guard checks the skills and MCP servers a plugin adds on your machine and asks you before a risky action runs. The scores above are free, and no plan changes them.

Is Vessel a fit?

From the plugin's manifest and HOL's scan. Anything the plugin does not declare is shown as not declared.

Works with

Codex
Claude Code
MCP
Ollama

1 MCP server

Before you install

Sign-in: Not declared
Declared access: Not declared
License: MIT

Check before relying on it

Some security checks did not finish: HOL plugin scan. See the evidence
1 high or critical finding from the scan. See the evidence

What is Vessel?

Vessel is a published tools & integrations plugin for AI coding agents that works with Codex, Claude Code, MCP and Ollama, developed by spenceclark and distributed through the HOL AI plugin registry. Local reverse proxy that records every request and response between agents and Ollama, OpenAI-compatible or Anthropic backends to SQLite for search, replay and comparison, with a read-only MCP server for Claude Code and other MCP clients.

Canonical slug: spenceclark/vessel
Version: v0.3.1 · updated Oct 15, 2026
Open data: entity.json (JSON-LD)

Registry snapshot

Repository: https://github.com/spenceclark/Vessel
Homepage: https://vesselproxy.app
Canonical profile: https://hol.org/registry/plugins/spenceclark%2Fvessel
Owner verification: Verified on HOL as @spenceclark
Scanner: Registry fallback scan
Security result: Caution
Digest verified: Yes

Trust and security

Trust & reputation

On-Chain Verified

HOL Trust Score

Per-metric points (0–100 each) combined via a weighted average into the overall score.

Installability

64/100

Maintenance

55/100

MCP server setup

65/100

Plugin Security

24/100

Provenance

80/100

Publisher Quality

100/100

Provenance

Plugin root: .
Source repo: https://github.com/spenceclark/Vessel
Source commit: b6bcdf416860…
Publisher verified: Yes
Owner verified: @spenceclark

Continuous scanner CI not detected

This plugin remains listed. Its overall trust score is reduced by 10% because security checks are not maintained in the source repository's CI.

Optional: maintain the scanner in the source repository's CI to receive the full trust score. Listing does not require that change.

README badge not detected

Plugin owners can add the HOL badge to the repository README from Guard Plugins. Distribution, not security evidence. It adds a 2% engagement adjustment to the overall trust score and never changes the security result.

Security posture

See how the Trust Score is computed

Caution

Security result

Security score

High findings

Provider: registry-broker-fallback
Grade: F · unsafe
Version: Unknown

cisco-skill-scanner: not_applicable

Published advisories

None matched in GitHub security advisories, checked 2026-10-30. This covers published advisories only, not problems nobody has reported.

GitHub security advisories are those the source repository has published.

Findings

mediumpublishabilitypublishability.link.missing.websiteURL

websiteURL should be present for marketplace readiness.

mediumpublishabilitypublishability.link.missing.privacyPolicyURL

privacyPolicyURL should be present for marketplace readiness.

mediumpublishabilitypublishability.link.missing.termsOfServiceURL

termsOfServiceURL should be present for marketplace readiness.

highmcp-securitymcp.remote.http

MCP server vessel uses insecure HTTP transport.

lowoperational-securitysupply-chain.lockfile-missing

Repository snapshot does not include a lockfile.

Install guidance

Install in Claude Code

Install through the Claude Code plugin marketplace.

Claude Code plugin docs

Optional: install HOL Guard for Claude Code first, so it can check this plugin's tools on your machine before Claude Code uses them.

1
Add the marketplace
Run this inside a Claude Code session. It registers the marketplace manifest shipped at the repository root. If the repository ships none, add the generated entry from the Advanced section below first.
claude code
2
Find the marketplace and plugin names
The install id is <plugin-entry>@<marketplace-name>, and the marketplace name is declared inside the manifest — it can differ from the repository name. List registered marketplaces to read both names.
shell
3
Install the plugin
Substitute the plugin entry name and the marketplace name shown by the previous step.
claude code

Did setup work in Claude Code?

No setup reports for Claude Code yet. Self-reported by signed-in visitors. Copying a command is not counted, and most installs are never reported.

Attested installs: Fewer than 10 attested installs of this plugin in week 2026-W43, so no number is shown. Counted from opt-in HOL Guard install reports, once per machine and runtime, and never mixed with the answers above. How install reports work.

1 / 1

Main screen

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Plugin manifest

{
  "name": "vessel",
  "version": "0.3.1",
  "description": "Search and inspect LLM traffic captured by a running Vessel proxy through its read-only MCP endpoint (requests, sessions, stats).",
  "author": {
    "name": "Spencer Clark",
    "url": "https://github.com/spenceclark"
  },
  "homepage": "https://vesselproxy.app",
  "repository": "https://github.com/spenceclark/Vessel",
  "license": "MIT",
  "keywords": [
    "llm",
    "observability",
    "proxy",
    "mcp",
    "ollama"
  ],
  "mcpServers": "./.registry/mcp.json",
  "interface": {
    "displayName": "vessel",
    "developerName": "spenceclark"
  },
  "holManifestOrigin": "repository",
  "registryIndexVersion": 5
}

Marketplace source

Repo URL: https://github.com/spenceclark/Vessel
Marketplace path: Unknown
Source path: .
Install policy: Unspecified

File inventory

.claude-plugin/plugin.json

file

613 bytes

b06d5b2116dddefb…

.codex-plugin/plugin.json

plugin-manifest

579 bytes

b9ee152192904dc2…

.registry/mcp.json

mcp-config

82 bytes

c61ec5ecb997e34b…

AGENTS.md

file

1,709 bytes

e4afdd028cf620f5…

CLAUDE.md

file

11 bytes

336cc4fbf19beaad…

README.md

file

17,472 bytes

1d5569f851917fe7…

SECURITY.md

file

1,619 bytes

52d79994b177d5dd…

Vessel — Frequently asked questions

What is Vessel?: Vessel is an AI plugin in the HOL registry. Local reverse proxy that records every request and response between agents and Ollama, OpenAI-compatible or Anthropic backends to SQLite for search, replay and comparison, with a read-only MCP server for Claude Code and other MCP clients.
How do I install Vessel?: Install Vessel in your harness: Codex — codex plugin marketplace add spenceclark/Vessel; Claude Code — /plugin marketplace add spenceclark/Vessel; MCP — git clone https://github.com/spenceclark/Vessel. Full step-by-step guidance is on the HOL plugin page.
How do I install Vessel in Codex?: To install Vessel in Codex, start with codex plugin marketplace add spenceclark/Vessel. The complete step-by-step install guide for Codex is on the HOL plugin page.
How do I install Vessel in Claude Code?: To install Vessel in Claude Code, start with /plugin marketplace add spenceclark/Vessel. The complete step-by-step install guide for Claude Code is on the HOL plugin page.
How do I install Vessel in MCP?: To install Vessel in MCP, start with git clone https://github.com/spenceclark/Vessel. The complete step-by-step install guide for MCP is on the HOL plugin page.
Is Vessel free?: Vessel is listed as free on HOL.
How is the Trust Score for Vessel computed?: Vessel has a HOL Trust Score of 35 out of 100. The score is a weighted sum of six components from a static scan of the source, capped for high-severity findings and adjusted by two disclosed policies. Memberships and payments are not inputs, and a scan is not a safety guarantee. Full breakdown: https://hol.org/registry/plugins/spenceclark%2Fvessel/trust
Who publishes Vessel?: Vessel is published by spenceclark and listed on HOL.
Is Vessel available now?: Vessel is currently available according to its latest public launch.

Install signal

HOL cannot see every install. These are separate signals from different sources, so they are not added together. Counts under each floor show as <N.

Install commands issued here: <5; HOL Guard install commands issued from this listing, last 28 days.
Opt-in install reports: <10; Machines that reported installing it through HOL Guard in week 2026-W43. Reporting is opt-in, so most installs are not counted.
HOL Guard workspaces: <5; Workspaces that approved it or include it in an approved-plugin feed, as of today.
New GitHub stars: <5; From HOL's GitHub snapshots of the repository, 2026-10-12 to 2026-10-31.

History, reviews, and similar plugins

Latest launch

Launch history

Vessel v0.3.1live · 0 points · 1 comments

User reviews

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Read or write reviews

Is Vessel a fit?

Works with

Before you install

Check before relying on it

What is Vessel?

Registry snapshot

Trust and security

Trust & reputation

HOL Trust Score

Provenance

Security posture

Published advisories

Findings

Install guidance

Install in Claude Code

Did setup work in Claude Code?

Plugin manifest

Marketplace source

File inventory

Vessel — Frequently asked questions

Install signal

Related plugins

Alternatives in Tools & Integrations

History, reviews, and similar plugins

Launch history

User reviews

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