Can it block merges in CI?

Yes, using the gate mode set to blocking, it exits with code 1 if divergences between declared and observed capabilities are found.

What if no manifest is provided?

The tool still produces a full blast radius report but cannot detect divergences without a manifest.

Are dynamic behaviors detected?

No, it relies on static analysis and may not detect dynamic imports, eval usage, or native extensions.

Install via pip and run 'mcp-blast-radius-gate --gate-mode [advisory|blocking] --target-dir /path/to/mcp-server'.

MCP Blast Radius

static-analysiscisecurityauditpython

Static analysis tool to extract and compare MCP server blast radius and manifest divergence for CI gating.

Quick Install

Automated & IDE Setup

Copy the AI prompt to install this server into Claude Code, Cursor, or another agent — or use 1-click editor setup below.

Add to Cursor Add to VS Code

We couldn’t automatically confirm this listing starts correctly

The install command below didn't complete successfully in our automated test.

uvx mcp-blast-radius

Downloading pydantic-core (2.0MiB) Downloading cryptography (4.5MiB) Downloaded pydantic-core Downloaded cryptography Installed 29 packages in 16ms Traceback (most recent call last): File "/home/user/.cache/uv/archive-v0/EvGsrBzWZBc3U8wu/bin/mcp-blast-radius", line 6, in <module> from aos_validator_mcp.server import main File "/home/user/.cache/uv/archive-v0/EvGsrBzWZBc3U8wu/lib/python3.11/site-packages/aos_validator_mcp/server.py", line 15, in <module> from mcp.server.fastmcp impo

This is an experimental automated check and can have false negatives — missing environment variables, a slow cold install, etc. It doesn’t necessarily mean something’s wrong. Last checked 1mo ago.

Manual Client & Custom JSON ConfigExpand JSON ▾

Client Config & Setup

Choose your client or environment

Target File:~/Library/Application Support/Claude/claude_desktop_config.json

claude_desktop_config.json

{
  "mcpServers": {
    "aos-standard-mcp-blast-radius": {
      "command": "uvx",
      "args": [
        "mcp-blast-radius"
      ]
    }
  }
}

💡 Paste the JSON block into your client's configuration file under mcpServers, then restart the application.

Overview

This tool statically analyzes an MCP server's codebase to determine its potential access surface, including files, network, subprocesses, and environment variables. It compares observed capabilities against a declared manifest to detect divergences, enabling CI gating to block merges if the server touches undeclared resources. Use it to audit MCP servers for compliance with declared boundaries before deployment.

Use cases

Scan MCP server code to identify accessible resources

Detect divergences between declared manifest and actual code behavior

Block CI merges when unauthorized resource access is detected

Generate JSON reports of static blast radius analysis

Apply for audit badges based on clean scan results

Key features

Static extraction of filesystem, network, subprocess, and environment access

Comparison of observed capabilities against manifest declarations

CI gate mode with blocking or advisory exit codes

Configurable scan scope excluding peripheral files by default

JSON output detailing blast radius and divergence reasons

MCP stdio server for integration with compatible clients

Capabilities & Tool Schemas (2)Self-reported

Inspect callable tools, capabilities, and parameters exposed to AI agents by MCP Blast Radius.

aos_compliance_validate

scan one MCP server directory (`target_dir` required; `tool_id` optional label)

aos_compliance_self_test

wiring smoke test

Documentation Overview

MCP Blast-Radius Auditor

See what any MCP server can actually touch — before you add it to your agent.

No manifest? You still get the full blast-radius report. Add a manifest to also catch divergences.

Also, if the server declares a manifest: Catch an MCP server that touches files it said it wouldn't — and block the merge in CI.

Statically extract what a third-party MCP server can reach (files, network, subprocess, env) via surface-level analysis. Compare against declared boundaries when a manifest is present.

Scan scope (default): production package only — excludes tests/, docs/, examples/, scripts/, benchmarks/, .github/, and test_*.py patterns; JSON output includes scan_scope and excluded_file_count. Pass --include-peripheral to scan the full repo.

Try it in 3 steps

① Scan your server in one command

Terminal

pip install mcp-blast-radius==0.2.5
mcp-blast-radius-gate --gate-mode advisory --target-dir /path/to/your-mcp-server

Point --target-dir at your shipping package root (e.g. src/). Default scope excludes tests, docs, and scripts.

② Read the JSON

Field	What it means
`gate_pass`	Scan finished (`advisory` = report either way; `blocking` = exit 1 on divergences)
`blocking_reasons`	Lines starting with `DIVERGENCE:` = declared vs. observed mismatch (if you ship a manifest)
`blast_radius`	Static capability surface (network, subprocess, env, filesystem)
`confidence` labels	`declared` / `observed-static` / `cannot-determine` — static only, upper bounds

Undeclared capability is usually drift, not malice. Treat network/subprocess counts as upper bounds, not confirmed traffic.

③ Apply for an audit badge (optional, opt-in)

Ran a clean scan and want a signed README badge? Open a badge application — paste your command and JSON. Free, 90-day attestation, no phone-home. Criteria: BADGE_CRITERIA.md.

To verify any published attestation independently: pip install cryptography, then run packaging/scripts/verify_attestation.py (accepts local paths or HTTPS URLs). See BADGE_CRITERIA.md §Verify.

Machine-readable metadata

Agent Card (capabilities, limitations, pricing): agent_card.json
Catalog entry (pricing, install, MCP endpoint): aos-standard/catalog
Spec: AOS-v0.1

Example walkthrough

bash

git clone --depth 1 https://github.com/oraios/serena.git /tmp/serena
mcp-blast-radius-gate --gate-mode advisory --target-dir /tmp/serena

Inspect blast_radius and any DIVERGENCE: lines in blocking_reasons.

Report a scan question

Open a GitHub issue with your JSON output (structured template loads automatically).

30-second scan

Terminal

pip install mcp-blast-radius
mcp-blast-radius-gate --gate-mode blocking --target-dir /path/to/mcp-server

pipx run mcp-blast-radius starts the MCP stdio server (for Claude Desktop / Cursor). For CLI scanning, use mcp-blast-radius-gate as above.

Red (blocking): divergence detected — code touches paths or capabilities not declared in manifest.
Green: no divergences (or no manifest — blast radius report only, advisory pass).

Install

bash

python3 -m venv .venv
source .venv/bin/activate
pip install .

CLI entry

bash

mcp-blast-radius          # MCP stdio server
mcp-blast-radius-gate     # CI gate (default blocking, exit 1 on fail)

CI blocking gate

bash

mcp-blast-radius-gate --gate-mode blocking --target-dir .
# no divergences → exit 0 / divergences or declaration violations → exit 1

MCP tools

aos_compliance_validate — scan one MCP server directory (target_dir required; tool_id optional label)
aos_compliance_self_test — wiring smoke test

Default gate_mode=advisory. Use gate_mode=blocking in CI to fail on divergences.

What is extracted

Layer	Scope	Confidence
Dependencies	`requirements.txt`, `pyproject.toml`, `package.json`	`declared`
Python AST	imports, file I/O, network, env, subprocess; MCP tool attribution	`observed-static` / `cannot-determine`
Divergence	manifest `permitted_output_paths` / `oracle_paths` vs observed access	blocking when mismatch

Limitations: Static analysis only. Dynamic imports, getattr/eval, obfuscation, and native extensions may hide capabilities. We do not claim complete coverage — every finding includes a confidence label.

Environment

Variable	Purpose
`AOS_VALIDATOR_TARGET_DIR`	Default scan root when `target_dir` is omitted
`AOS_VALIDATOR_MCP_LOG`	JSONL path for local tool call log (never sent externally)
`AOS_VALIDATOR_CALLER`	Caller label (`ci`, `smoke_self_call`, etc.)

Example

bash

aos_compliance_validate target_dir=/path/to/my-mcp-server gate_mode=blocking

License

MIT

Read the full README →View source on GitHub →

Related MCP Servers

View all in Biology & Bioinformatics View all alternatives

Adoption & maintenance

Factual signals from GitHub, npm, and our automated checks — not a rating.

Last commit

1mo ago

Most recent push to the default branch.

Install check

Inconclusive

Install command did not finish in our automated test.

Tools exposed

Callable tools this server registers over MCP.

Directory activity

2 views

Config copies, upvotes, and views on AllMCPs.

Reviews

No reviews yet — be the first to share how this listing worked for you.

Frequently Asked Questions about MCP Blast Radius

It performs static analysis of MCP server code to extract potential access to files, network, subprocesses, and environment variables.

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Markdown (GitHub README)

[![AllMCPs](https://allmcps.com/api/badge/aos-standard-mcp-blast-radius?style=directory)](https://allmcps.com/mcp/aos-standard-mcp-blast-radius)

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Technical Specs & Signals

CategoryBiology & Bioinformatics

PricingFree

53Quality signal: Good · 53/100How this signal is calculated ▾

Server availabilityNot measured

Not scored for repo-hosted servers — we can't reach the running server, only its GitHub page. Hosted MCP endpoints are health-checked live.

Verified ownership10/20

Documentation & tools28/30

Adoption & activity2/15

Community engagement0/10

A guidance signal from public completeness & health data — not a user rating. New listings start lower and rise as they add docs, get verified, and grow adoption. Signals we can't observe for a listing are skipped, not counted against it.

Supply-chain signal

No high-severity advisories surfaced by our automated scan.

Critical 0High 0Medium 0Low 0

Scanned 23d ago via OSV.dev · mcp-blast-radius (PyPI)

★ Featured

AllMCPs Server

The official MCP server for AllMCPs.com - submit and manage tools directly from your AI. The open directory for MCP servers. Connect Claude, Cursor, Windsurf, and AI agents to databases, tools, files, and APIs. Explore 10,000+ servers. AllMCPs is the premier, open directory for discovering, evaluating, and installing Model Context Protocol (MCP) servers to equip AI agents and LLMs with real-world superpowers.

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Explore more

More in 🧬 Biology & Bioinformatics →Alternatives to MCP Blast Radius →Install in Claude Desktop Install in Cursor Install in VS Code

MCP Blast Radius

static-analysiscisecurityauditpython

Static analysis tool to extract and compare MCP server blast radius and manifest divergence for CI gating.

Quick Install

Automated & IDE Setup

Copy the AI prompt to install this server into Claude Code, Cursor, or another agent — or use 1-click editor setup below.

Add to Cursor Add to VS Code

We couldn’t automatically confirm this listing starts correctly

The install command below didn't complete successfully in our automated test.

uvx mcp-blast-radius

Manual Client & Custom JSON ConfigExpand JSON ▾

Client Config & Setup

Choose your client or environment

Target File:~/Library/Application Support/Claude/claude_desktop_config.json

claude_desktop_config.json

{
  "mcpServers": {
    "aos-standard-mcp-blast-radius": {
      "command": "uvx",
      "args": [
        "mcp-blast-radius"
      ]
    }
  }
}

💡 Paste the JSON block into your client's configuration file under mcpServers, then restart the application.

Overview

Use cases

Scan MCP server code to identify accessible resources

Detect divergences between declared manifest and actual code behavior

Block CI merges when unauthorized resource access is detected

Generate JSON reports of static blast radius analysis

Apply for audit badges based on clean scan results

Key features

Static extraction of filesystem, network, subprocess, and environment access

Comparison of observed capabilities against manifest declarations

CI gate mode with blocking or advisory exit codes

Configurable scan scope excluding peripheral files by default

JSON output detailing blast radius and divergence reasons

MCP stdio server for integration with compatible clients

Capabilities & Tool Schemas (2)Self-reported

Inspect callable tools, capabilities, and parameters exposed to AI agents by MCP Blast Radius.

aos_compliance_validate

scan one MCP server directory (`target_dir` required; `tool_id` optional label)

aos_compliance_self_test

wiring smoke test

Documentation Overview

MCP Blast-Radius Auditor

See what any MCP server can actually touch — before you add it to your agent.

No manifest? You still get the full blast-radius report. Add a manifest to also catch divergences.

Also, if the server declares a manifest: Catch an MCP server that touches files it said it wouldn't — and block the merge in CI.

Statically extract what a third-party MCP server can reach (files, network, subprocess, env) via surface-level analysis. Compare against declared boundaries when a manifest is present.

Try it in 3 steps

① Scan your server in one command

Terminal

pip install mcp-blast-radius==0.2.5
mcp-blast-radius-gate --gate-mode advisory --target-dir /path/to/your-mcp-server

Point --target-dir at your shipping package root (e.g. src/). Default scope excludes tests, docs, and scripts.

② Read the JSON

Field	What it means
`gate_pass`	Scan finished (`advisory` = report either way; `blocking` = exit 1 on divergences)
`blocking_reasons`	Lines starting with `DIVERGENCE:` = declared vs. observed mismatch (if you ship a manifest)
`blast_radius`	Static capability surface (network, subprocess, env, filesystem)
`confidence` labels	`declared` / `observed-static` / `cannot-determine` — static only, upper bounds

Undeclared capability is usually drift, not malice. Treat network/subprocess counts as upper bounds, not confirmed traffic.

③ Apply for an audit badge (optional, opt-in)

Ran a clean scan and want a signed README badge? Open a badge application — paste your command and JSON. Free, 90-day attestation, no phone-home. Criteria: BADGE_CRITERIA.md.

To verify any published attestation independently: pip install cryptography, then run packaging/scripts/verify_attestation.py (accepts local paths or HTTPS URLs). See BADGE_CRITERIA.md §Verify.

Machine-readable metadata

Agent Card (capabilities, limitations, pricing): agent_card.json
Catalog entry (pricing, install, MCP endpoint): aos-standard/catalog
Spec: AOS-v0.1

Example walkthrough

bash

git clone --depth 1 https://github.com/oraios/serena.git /tmp/serena
mcp-blast-radius-gate --gate-mode advisory --target-dir /tmp/serena

Inspect blast_radius and any DIVERGENCE: lines in blocking_reasons.

Report a scan question

Open a GitHub issue with your JSON output (structured template loads automatically).

30-second scan

Terminal

pip install mcp-blast-radius
mcp-blast-radius-gate --gate-mode blocking --target-dir /path/to/mcp-server

pipx run mcp-blast-radius starts the MCP stdio server (for Claude Desktop / Cursor). For CLI scanning, use mcp-blast-radius-gate as above.

Red (blocking): divergence detected — code touches paths or capabilities not declared in manifest.
Green: no divergences (or no manifest — blast radius report only, advisory pass).

Install

bash

python3 -m venv .venv
source .venv/bin/activate
pip install .

CLI entry

bash

mcp-blast-radius          # MCP stdio server
mcp-blast-radius-gate     # CI gate (default blocking, exit 1 on fail)

CI blocking gate

bash

mcp-blast-radius-gate --gate-mode blocking --target-dir .
# no divergences → exit 0 / divergences or declaration violations → exit 1

MCP tools

aos_compliance_validate — scan one MCP server directory (target_dir required; tool_id optional label)
aos_compliance_self_test — wiring smoke test

Default gate_mode=advisory. Use gate_mode=blocking in CI to fail on divergences.

What is extracted

Layer	Scope	Confidence
Dependencies	`requirements.txt`, `pyproject.toml`, `package.json`	`declared`
Python AST	imports, file I/O, network, env, subprocess; MCP tool attribution	`observed-static` / `cannot-determine`
Divergence	manifest `permitted_output_paths` / `oracle_paths` vs observed access	blocking when mismatch

Environment

Variable	Purpose
`AOS_VALIDATOR_TARGET_DIR`	Default scan root when `target_dir` is omitted
`AOS_VALIDATOR_MCP_LOG`	JSONL path for local tool call log (never sent externally)
`AOS_VALIDATOR_CALLER`	Caller label (`ci`, `smoke_self_call`, etc.)

Example

bash

aos_compliance_validate target_dir=/path/to/my-mcp-server gate_mode=blocking

License

MIT

Read the full README →View source on GitHub →

Related MCP Servers

View all in Biology & Bioinformatics View all alternatives

Adoption & maintenance

Factual signals from GitHub, npm, and our automated checks — not a rating.

Last commit

1mo ago

Most recent push to the default branch.

Install check

Inconclusive

Install command did not finish in our automated test.

Tools exposed

Callable tools this server registers over MCP.

Directory activity

2 views

Config copies, upvotes, and views on AllMCPs.

Reviews

No reviews yet — be the first to share how this listing worked for you.

Frequently Asked Questions about MCP Blast Radius

It performs static analysis of MCP server code to extract potential access to files, network, subprocesses, and environment variables.

AllMCPs Directory Badge

Full Badge Customizer

Showcase your server listing on GitHub or your project documentation. Embed this dynamic SVG badge to highlight official listing status and live engagement.

Badge Style:

Live Dynamic SVG Preview

Markdown (GitHub README)

[![AllMCPs](https://allmcps.com/api/badge/aos-standard-mcp-blast-radius?style=directory)](https://allmcps.com/mcp/aos-standard-mcp-blast-radius)

HTML Embed

<a href="https://allmcps.com/mcp/aos-standard-mcp-blast-radius"><img src="https://allmcps.com/api/badge/aos-standard-mcp-blast-radius?style=directory" alt="MCP Blast Radius on AllMCPs" /></a>

Technical Specs & Signals

CategoryBiology & Bioinformatics

PricingFree

53Quality signal: Good · 53/100How this signal is calculated ▾

Server availabilityNot measured

Not scored for repo-hosted servers — we can't reach the running server, only its GitHub page. Hosted MCP endpoints are health-checked live.

Verified ownership10/20

Documentation & tools28/30

Adoption & activity2/15

Community engagement0/10

Supply-chain signal

No high-severity advisories surfaced by our automated scan.

Critical 0High 0Medium 0Low 0

Scanned 23d ago via OSV.dev · mcp-blast-radius (PyPI)

★ Featured

AllMCPs Server

Explore Server →

Own this project?

Free dofollow backlink: add your website and place the AllMCPs badge on it — no claim needed. We detect it automatically and keep it verified as long as the badge stays live.

Claim & get free dofollow

Share & Embed

Add our SVG badge (dark/light directory styles) or embeddable widget to your site.

Explore more

More in 🧬 Biology & Bioinformatics →Alternatives to MCP Blast Radius →Install in Claude Desktop Install in Cursor Install in VS Code