HeraldBLOCK
The self-hosted MCP bridge between Claude Chat and Claude Code.
Overview
From the repository's own README, as read at the audited commit. Badges and raw HTML are left out.
Herald
Code from your phone. Seriously.
The self-hosted MCP bridge between Claude Chat and Claude Code.
Documentation · Quick Start · How It Works · Features · Security · Roadmap
🇫🇷 Version française
You're on the couch. On your phone. You open Claude Chat and type:
"Refactor the auth middleware in my-api to use JWT instead of session cookies. Run the tests."
Four minutes later, it's done. Branch created, code refactored, tests passing, changes committed. Your workstation did all the work. You never opened your laptop.
That's Herald.
The Problem
Claude Chat and Claude Code are two brilliant tools that live in completely separate worlds.
You've been copy-pasting between them. Or worse — you've been waiting until you're back at your desk. That's over.
The Solution
Herald is a self-hosted MCP server that bridges Claude Chat to Claude
d67b9596738dOBSERVED · 2026-10-08Trust audit
BLOCKgrade F · trust 52/100 Do not install this without reading the findings. The audit found something that could harm you or your machine.
| Layer | What it checks | Result |
|---|---|---|
| L0 | Provenance & inventory | FAIL |
| L1 | Static analysis of the code | FAIL |
| L2 | Instruction surface (what it tells the agent) | PASS |
| L3 | Class-specific surface | WARN |
| L4 | Behavioural (sandbox) | SKIPPED |
What the source does
- Filesystem
- declared (1 observation(s))
- Network
- declared (12 observation(s))
- Shell
- none-observed
- Dependencies
- pinned
- Secrets in source
- found
Findings (25)
.env
sudo mv "$src" "$dst"
sudo chmod +x "$dst"
"/etc/herald/herald.yaml",
url := fmt.Sprintf("http://127.0.0.1:%d/health", *port)public_url="http://127.0.0.1:${port}"streamable-http
.env
.goreleaser.yml
claude_path: "/usr/local/bin/claude"
assert.Equal(t, "/usr/local/bin/claude", cfg.Execution.ClaudePath)
"claude_path": "/usr/local/bin/claude",
assert.Equal(t, "/usr/local/bin/claude", claudeExec.ClaudePath)
"path": "../../../etc/passwd",
{"deep traversal", "../../../etc/shadow"},{"hidden traversal", "src/../../etc/passwd"},curl http://127.0.0.1:8420/health
- url: "http://127.0.0.1:8420"
- Verify Herald is running: `curl http://127.0.0.1:8420/health`
- "/var/run/docker.sock:/var/run/docker.sock:ro"
Claude Code relies on user-level authentication tokens stored in your home directory. A **user-level systemd service** (`~/.config/systemd/user/`) inherits your environment, so Herald can access Claud
curl -fsSL https://raw.githubusercontent.com/btouchard/herald/main/install.sh | sh
curl -fsSL https://raw.githubusercontent.com/btouchard/herald/main/install.sh | sh
curl -fsSL https://raw.githubusercontent.com/btouchard/herald/main/install.sh | sh
Gates applied: no_behavioural_pass.
d67b9596738dfull audit observations/trust-audit/mcp-server/btouchard__herald.json · Report an issue / request a re-scanAudit history
Every audit this server has had. A grade with a past is a grade somebody is still checking.
| Date | Source | Verdict | Grade | Score | Change |
|---|---|---|---|---|---|
| 2026-10-08 | d67b9596738d | BLOCK | F | 52 | first audit |
Questions
What is the Herald MCP server?
The self-hosted MCP bridge between Claude Chat and Claude Code.
Is Herald safe to connect to an agent?
No — not without reading the findings first. The audit graded it F (52/100) and found 3 critical or high issues in the source. Each one is listed on this page with the file and line it is on.
What credentials does Herald need?
No credential environment variables were found in its source, so it appears to need none.
How does Herald run?
It speaks streamable-http, so it runs as a service you connect to over the network.
How current is this page?
The grade is for one exact copy of the source (d67b9596738d), read on 2026-10-08. The repository is watched and re-audited when it changes.