🛡️ Agent Shield

PII Redaction Shield for AI Agents

Strip PII before the LLM. Restore it after. Zero data leaks.

What it does

Agent Shield sits between your agent and the LLM. Before sending data, it redacts PII (names, emails, phone numbers, SSNs, credit cards, addresses). After the LLM responds, it hydrates the original values back in. Your LLM never sees sensitive data.

Why agents need this

•LLMs are external APIs — every prompt sends data to a third party
•PII in prompts violates GDPR, CCPA, and most data handling policies
•Once PII is in an LLM context window, it can appear in logs, caches, and training data
•Building PII redaction is complex — regex misses edge cases, NER is expensive to maintain

Get started in 30 seconds

One API call. No SDK. No configuration.

cURL

curl -X POST https://www.agent-utils.com/api/shield \
  -H "x-api-key: au_your_key" \
  -H "Content-Type: application/json" \
  -d '{
    "text": "Hi, I am John Doe (john@example.com). My SSN is 123-45-6789."
  }'

Python

import requests

resp = requests.post(
    "https://www.agent-utils.com/api/shield",
    headers={"x-api-key": "au_your_key"},
    json={"text": "Hi, I am John Doe (john@example.com). My SSN is 123-45-6789."},
)
redacted = resp.json()["data"]["redacted"]
# "Hi, I am [NAME_1] ([EMAIL_1]). My SSN is [SSN_1]."

JavaScript

const res = await fetch("https://www.agent-utils.com/api/shield", {
  method: "POST",
  headers: {
    "x-api-key": "au_your_key",
    "Content-Type": "application/json",
  },
  body: JSON.stringify({
    text: "Hi, I am John Doe (john@example.com). My SSN is 123-45-6789.",
  }),
});
const { data } = await res.json();
console.log(data.redacted);
// "Hi, I am [NAME_1] ([EMAIL_1]). My SSN is [SSN_1]."

Use cases

Customer support

Agent processes support tickets containing customer names, emails, and order details

Healthcare records

Agent analyzes patient data — redact PHI before any LLM call

Financial analysis

Agent works with transaction data containing account numbers and SSNs

HR automation

Agent processes employee records — redact personal details before summarization

AgentUtils vs. alternatives

Traditional tools like Presidio (Microsoft), Nightfall, Tonic.ai require SDK integration, credential management, and infrastructure setup. AgentUtils replaces all of that with a single HTTP call.

	AgentUtils	Alternatives
Setup time	30 seconds	Hours to days
SDK required	No (REST API)	Yes
Credentials to manage	1 API key	Multiple keys/tokens
Infrastructure	Zero-config	Provision + configure

Related tools

📋 Audit Log

Immutable agent action history.

🗄️ KV Store

State persistence for agents.

⚡ Rate Limiter

Outbound API rate limiting.

All AgentUtils tools

📎 Ephemeral File Host 📬 Dead Letter Queue 👤 Human-in-the-Loop 🛡️ Agent Shield 🔑 AgentVerify OTP 🔔 Notification Router 📋 Audit Log 🗄️ KV Store ⚡ Rate Limiter 📩 Webhook Inbox 📝 Agent Form

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500 free API calls per month. No credit card required.

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