Grades are a hygiene check, not a security guarantee.

MCP, MCP server

Data Aggregator Mcp

data-aggregator-mcp is an MCP server that lets AI agents search 21 public research-data sources at once and get back one deduplicated list.

Compatibility: Not stated.

Grade B

Minor issues only, no Medium or High. Worth a quick look at the findings below before installing.

Graded by PlugVetRubric v2

Not a guarantee. A hygiene check of the source at the commit shown, not a security audit.

PERMISSION_DELETE_FILES NETWORK_NO_FIXED_HOST SECRETS_PATH_DOTENV SECRETS_ENV_READ OBFUSCATION_FILE_OVER_READ_CAP OBFUSCATION_FILE_CAP_REACHED

Why this grade

  • PERMISSION_DELETE_FILES Low

    Contains a call that can delete files.

    benchmarks/h2h/adjudicate.py, line 67 shutil.rmtree(work)

  • NETWORK_NO_FIXED_HOST Low

    Makes a network call whose host is not written as a fixed address.

    benchmarks/h2h/analyze.py, line 73 # Round 5: the queries PREREG_2026-10-18.md fixed before any fetch (backup topics used

  • SECRETS_PATH_DOTENV Low

    Mentions a .env file.

    src/data_aggregator_mcp/llm.py, line 42 # UnicodeEncodeError for a non-ASCII key, and a line break (a CRLF .env file) is an h11

  • SECRETS_ENV_READ Note

    Reads an environment variable whose name contains KEY, SECRET, TOKEN, PASSWORD or CREDENTIAL.

    src/data_aggregator_mcp/_eutils.py, line 27 key = os.environ.get("NCBI_API_KEY")

  • OBFUSCATION_FILE_OVER_READ_CAP Note

    A file was over the read cap and was not fully read.

    uv.lock, line 1 version = 1

  • OBFUSCATION_FILE_CAP_REACHED Note

    The 400 file cap was reached before every file was read.

    uv.lock, line 1 version = 1

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

    Concern

    can delete files.

    PERMISSION_DELETE_FILES

    benchmarks/h2h/adjudicate.py, line 67

    shutil.rmtree(work)

    benchmarks/h2h/adjudicate.py, line 81

    proc = subprocess.run(cmd, cwd=work, stdout=fh, stderr=subprocess.PIPE, text=True,

    benchmarks/h2h/adjudicate.py, line 101

    shutil.rmtree(work)

    Show more

    benchmarks/h2h/build_keys.py, line 190

    proc = subprocess.run(

    benchmarks/h2h/run.py, line 196

    proc = subprocess.run(["claude", "--version"], capture_output=True, text=True, check=True)

    benchmarks/h2h/run.py, line 341

    proc = subprocess.run(

    benchmarks/h2h/run.py, line 364

    shutil.rmtree(cwd)

    benchmarks/h2h/run.py, line 365

    shutil.rmtree(state)

    benchmarks/h2h/run.py, line 771

    proc = subprocess.run(

    benchmarks/perf/ratchet.py, line 192

    proc = subprocess.run(

    scripts/guardrails-selftest.sh, line 42

    check nosec-needs-reason m.py 'subprocess.call(cmd, shell=True) # nosec' fail

    scripts/guardrails-selftest.sh, line 43

    check nosec-needs-reason m2.py 'subprocess.call(cmd, shell=True) # nosec B602' fail

  • Install and update

    Pass

    No install-time script found, and dependencies are pinned or absent.

  • Network

    Concern

    can reach a host that is not written as a fixed address.

    NETWORK_NO_FIXED_HOST

    benchmarks/h2h/analyze.py, line 73

    # Round 5: the queries PREREG_2026-10-18.md fixed before any fetch (backup topics used

    benchmarks/h2h/analyze.py, line 237

    with urllib.request.urlopen(req, timeout=60) as resp: # nosec B310 - fixed https host

    benchmarks/h2h/round4/osf_recheck.py, line 35

    with urllib.request.urlopen(req, timeout=60) as r: # nosec B310 - fixed https host

    Show more

    src/data_aggregator_mcp/_pushdown.py, line 4

    The router applies these filters after fetch (``router._passes_filters``) to every

    src/data_aggregator_mcp/http_transport.py, line 26

    `fetch(dest=...)` writes to the filesystem of the **server** process. Over stdio

    src/data_aggregator_mcp/server.py, line 502

    # fetch(dest=...) writes to THIS process's filesystem. Over stdio that is the

    src/data_aggregator_mcp/server.py, line 505

    "data-aggregator-mcp: serving over HTTP - note that fetch() writes to this "

    CHANGELOG.md, line 1729

    `fetch(dest=…)` writes to the **server's** filesystem, not the caller's. The

  • Secrets

    Concern

    reads a credential or environment file.

    SECRETS_ENV_READ SECRETS_PATH_DOTENV

    src/data_aggregator_mcp/_eutils.py, line 27

    key = os.environ.get("NCBI_API_KEY")

    src/data_aggregator_mcp/_ratelimit.py, line 66

    return (10.0 if os.environ.get("NCBI_API_KEY") else 3.0) * _NCBI_HEADROOM

    src/data_aggregator_mcp/llm.py, line 42

    # UnicodeEncodeError for a non-ASCII key, and a line break (a CRLF .env file) is an h11

    Show more

    src/data_aggregator_mcp/datagov.py, line 144

    key = os.environ.get("DATA_GOV_API_KEY")

    src/data_aggregator_mcp/embeddings.py, line 59

    os.environ.get("EMBEDDING_API_KEY"),

    src/data_aggregator_mcp/llm.py, line 56

    os.environ.get("LLM_API_KEY"),

    CHANGELOG.md, line 830

    `.env` file with Windows line endings leaves it) or a non-ASCII character, and an

  • Agent instructions

    Pass

    No instruction to ignore earlier instructions or to hide a step.

  • Obfuscation

    Note

    a file was over the read cap and was not fully read. the file cap was reached before every file was read.

    OBFUSCATION_FILE_OVER_READ_CAP OBFUSCATION_FILE_CAP_REACHED

    uv.lock, line 1

    version = 1

    benchmarks/h2h/rescored/r5/scores_rescored.json, line 1

    [

    benchmarks/h2h/round5/scores_2026-10-19.json, line 1

    [

    Show more

    tests/test_pubmed_observed.py, line 1

    """What the PubMed adapter sends and what it reports, pinned exactly (#88 mutation burn-down)."""

  • Licence

    Pass

    A licence file is present (LICENSE).

  • Maintainer activity

    Pass

    The latest commit is within the last 365 days.

Get the full report on this tool, £49

Note

Hygiene check of commit d1823add31d1. can delete files. can reach a host that is not written as a fixed address. reads a credential or environment file. a file was over the read cap and was not fully read. the file cap was reached before every file was read.

Date and source

Date checked:

View source

github.com

Commit graded: d1823add31d13bbece984dab29f53c96eda2c4ef

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.

Read how this letter is chosen