langchain - 💡(How to fix) Fix Cryptographic agent identity, intent verification, and kill switch for production deployments [47 comments, 12 participants]

Checked other resources

• This is a feature request, not a bug report or usage question.
• I added a clear and descriptive title that summarizes the feature request.
• I used the GitHub search to find a similar feature request and didn't find it.
• I checked the LangChain documentation and API reference to see if this feature already exists.
• This is not related to the langchain-community package.

Package (Required)

• langchain
• langchain-openai
• langchain-anthropic
• langchain-classic
• langchain-core
• langchain-model-profiles
• langchain-tests
• langchain-text-splitters
• langchain-chroma
• langchain-deepseek
• langchain-exa
• langchain-fireworks
• langchain-groq
• langchain-huggingface
• langchain-mistralai
• langchain-nomic
• langchain-ollama
• langchain-openrouter
• langchain-perplexity
• langchain-qdrant
• langchain-xai
• Other / not sure / general

Feature Description

When LangChain agents are deployed to production, there is no built-in mechanism to cryptographically verify which agent is executing a tool call, enforce per-tool action boundaries (allowed/denied actions, monetary limits), or instantly revoke a compromised agent's access across all tools.

I'm requesting native support for cryptographic agent identity and intent verification, so every tool call is signed, verified, and auditable before execution. This includes a kill switch that instantly blocks all tool calls from a revoked agent.

Use Case

In production environments handling financial transactions or sensitive data, agent security currently relies on prompt engineering and API key scoping, both are insufficient.

Example: A LangChain agent has access to transfer_funds, send_email, and search_database. Today, if a prompt injection tricks the agent into calling transfer_funds("[email protected]", 50000), there is no protocol-level barrier. With cryptographic identity, the action is automatically blocked because the signed intent fails verification against the agent's $500 per-transaction boundary, the tool never executes.

This is critical for anyone deploying LangChain agents in fintech, healthcare, or enterprise environments.

Proposed Solution

An open-source protocol called AIP (Agent Identity Protocol) that solves this:

• Agent Passports — Ed25519 keypair per agent with allowed/denied actions and monetary limits
• Signed Intent Envelopes — Before every tool call, agent signs: "I am X, doing Y, at time T"
• Kill Switch — Instant revocation, sub-millisecond, zero network calls

GitHub: https://github.com/theaniketgiri/aip

from aip_protocol import AgentPassport, create_envelope, sign_envelope, verify_intent

passport = AgentPassport.create(
    domain="fintech.com", agent_name="assistant",
    allowed_actions=["search", "send_email", "transfer_funds"],
    denied_actions=["delete_records"],
    monetary_limit_per_txn=500,
)
# Every tool call → signed envelope → verified → execute or block

This have a working LangChain integration.

Alternatives Considered

• API key scoping — Limits which APIs an agent can call, but doesn't verify intent or enforce monetary limits per action
• Prompt-level guardrails — System prompts saying "don't transfer more than $500" can be bypassed by prompt injection
• LLM-as-judge — Using another LLM to validate actions adds latency and is probabilistic, not deterministic

AIP is deterministic, sub-millisecond, and operates outside the LLM context — it cannot be bypassed by prompt engineering.

Additional Context

• Working LangChain demo: github.com/theaniketgiri/aip/demos/langchain_protected_tools
• Repo: github.com/theaniketgiri/aip
• Install: pip install aip-protocol