MCP, MCP server
Courier
Courier, an MCP server listed in the PlugVet directory.
Compatibility: Not stated.
Grade C
One Medium finding. Read the findings before installing.
Not a guarantee. A hygiene check of the source at the commit shown, not a security audit.
INSTALL_REMOTE_SCRIPT
Why this grade
- INSTALL_REMOTE_SCRIPT Medium
Fetches a script from the network and runs it (a pipe to a shell, or an install hook with a URL).
public/index.html, line 105
<code>curl -s https://getcourier.dev/examples/http/quickstart.sh | bash</code><br>
Any High, or two or more Medium findings, give D. One Medium gives C. Low findings or a security Note give B. Each code names a finding behind the letter.
Grades are a hygiene check of the source at the commit shown, on the date checked, not a security audit or a guarantee. The free directory grades are automated. Before release, a PlugVet engineer reviews every paid report and any grade we hold back, including all F grades, against the source code and the evidence we quote.
What was checked
Plain notes from the hygiene checks.
Permissions
Pass
No shell or command call was found in the code. This check does not read permissions an entry declares. A permission line to fetch web content was found in this repository, and it may apply to this entry.
Install and update
Serious
install fetches a script from the network.
INSTALL_REMOTE_SCRIPT
README.md, line 157
curl -s https://getcourier.dev/examples/http/quickstart.sh | bash
public/index.html, line 105
<code>curl -s https://getcourier.dev/examples/http/quickstart.sh | bash</code><br>
Network
Concern
can reach a host that is not written as a fixed address.
NETWORK_NO_FIXED_HOST
deploy-to-grace.sh, line 40
echo "Verify: curl -s https://getcourier.dev/ | head -5"
install.sh, line 13
# bash <(curl -s https://getcourier.dev/install.sh)
install.sh, line 51
curl -s -o courier.py https://getcourier.dev/examples/python/courier.py
Show more
install.sh, line 59
curl -s -o courier.mjs https://getcourier.dev/examples/node/courier.mjs
install.sh, line 92
INBOX=$(curl -s -X POST $BASE/alias \
install.sh, line 105
HEALTH=$(curl -s $BASE/health)
install.sh, line 117
echo " Python: curl -O https://getcourier.dev/examples/python/courier.py"
install.sh, line 118
echo " Node: curl -O https://getcourier.dev/examples/node/courier.mjs"
install.sh, line 122
echo "Then: curl -s $BASE/messages | python3 -m json.tool"
mail-receiver-v2.js, line 442
const proxyReq = http.request(opts, (proxyRes) => { let data = ''; pro
examples/autonomous-onboarding.sh, line 2
# Autonomous Courier onboarding - 6-step curl flow
examples/autonomous-onboarding.sh, line 15
curl -s $BASE/capabilities | jq .capabilities[].name
examples/autonomous-onboarding.sh, line 20
curl -s $BASE/health | jq .status
examples/autonomous-onboarding.sh, line 25
ALIAS_RESP=$(curl -s -X POST $BASE/alias \
examples/openai-agents-integration.md, line 131
r = requests.post("https://getcourier.dev/alias",
examples/openai-agents-integration.md, line 139
r = requests.get("https://getcourier.dev/messages")
Secrets
Concern
reads a credential or environment file.
SECRETS_PATH_DOTENV
.gitignore, line 13
# Secrets
.gitignore, line 14
.env
Agent instructions
Pass
No instruction to ignore earlier instructions or to hide a step.
Obfuscation
Pass
No encoded or minified payload found.
Licence
Pass
A licence file is present (LICENSE).
Maintainer activity
Pass
The latest commit is within the last 365 days.
Note
Hygiene check of commit da28789a8529. install fetches a script from the network. can reach a host that is not written as a fixed address. reads a credential or environment file.
Date and source
Date checked:
github.com
Commit graded: da28789a8529c1acefd3b8b8770d74d281035af9
This link goes to the original host. PlugVet does not host or check what you download from there, and installing it is your own decision and risk.