Agent Prompt Injection Firewall MCP

WAF for AI agents — block prompt injection before it reaches the LLM

Agents that blindly forward user input + retrieved documents to other agents are the #1 production AI vulnerability (OWASP LLM01). This MCP is the pre-flight gate.

By MEOK AI Labs.

Install

pip install agent-prompt-injection-firewall-mcp

Tools

scan_prompt
define_custom_rule
list_rules
scan_log
sign_firewall_attestation

Claude Desktop

{
  "mcpServers": {
    "agentpromptinjectionfirewall": { "command": "agent-prompt-injection-firewall-mcp" }
  }
}

Tiers

Free — generous daily limit (100-1,000 depending on operation)
Pro £199/mo — unlimited + signed HMAC attestations with public verify URLs — subscribe
Enterprise £1,499/mo — multi-tenant + custom predicate DSL + SIEM webhook push — subscribe

Why this exists

The EU AI Act (Aug 2026), DORA (live), ISO 42001, and OWASP LLM01 Top-10 all demand runtime controls for agent systems — not just deployment-time audits. This MCP is that runtime control layer, emitting cryptographically signed evidence your auditor accepts.

Related MEOK A2A MCPs

agent-policy-enforcement-mcp — per-pair IAM
agent-handoff-certified-mcp — signed delegation chain
agent-prompt-injection-firewall-mcp — prompt injection WAF
agent-rate-limiter-mcp — fleet-wide quota
agent-audit-logger-mcp — hash-chained signed log
a2a-governance-bridge-mcp — map A2A to compliance frameworks
meok-attestation-verify — independent cert verifier

License

MIT — MEOK AI Labs, 2026.

License
- OSI Approved :: MIT License
Operating System
- OS Independent
Programming Language
- Python :: 3
Topic
- Security

Metadata

License
- OSI Approved :: MIT License
Operating System
- OS Independent
Programming Language
- Python :: 3
Topic
- Security

Release files for agent-prompt-injection-firewall-mcp 1.0.0

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Source distribution (sdist)

Source distribution for agent-prompt-injection-firewall-mcp 1.0.0
File	Size	Uploaded
agent_prompt_injection_firewall_mcp-1.0.0.tar.gz	7.3 kB	Apr 23, 2026	Details

Built distribution (wheel)

Table of built distributions (wheels) for agent-prompt-injection-firewall-mcp 1.0.0
File	Interpreter	ABI	Platform	Reset
agent_prompt_injection_firewall_mcp-1.0.0-py3-none-any.whl 9.1 kB Apr 23, 2026	Python 3	none	any	Details

Total release size: 16.5 kB

Release files / agent_prompt_injection_firewall_mcp-1.0.0.tar.gz

Download URL	agent_prompt_injection_firewall_mcp-1.0.0.tar.gz
Size	7.3 kB
Tags	Source
SHA-256 checksum How to use checksums	`21a81cfaf9f20d24071c36233a05cc3df4f4b1a9137dd6620a6a85298799e664`
BLAKE2b-256 checksum How to use checksums	`d7082e50b9e92a8c4ccd9c263248f181066e667c95c813a4965e5ffec652500f`
Upload date	Apr 23, 2026
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Uploaded via	`twine/6.2.0 CPython/3.9.6`

Release files / agent_prompt_injection_firewall_mcp-1.0.0-py3-none-any.whl

Download URL	agent_prompt_injection_firewall_mcp-1.0.0-py3-none-any.whl
Size	9.1 kB
Tags	Python 3
SHA-256 checksum How to use checksums	`23d92ae97db15df55c56100431b28b46fd28e9798ee6612f55adce6d23cc6c0c`
BLAKE2b-256 checksum How to use checksums	`935d712975f6b9dea399d3c410317f46b1f3d1b298acd92b3fca36cc66f90b05`
Upload date	Apr 23, 2026
Uploaded using Trusted Publishing? What is trusted publishing?	No
Uploaded via	`twine/6.2.0 CPython/3.9.6`