Check Guardrail
curl --request POST \
--url https://api.truthlocks.com/v1/guardrails/check \
--header 'Content-Type: application/json' \
--header 'X-API-Key: <api-key>' \
--data '
{
"agent_id": "550e8400-e29b-41d4-a716-446655440000",
"action": "invoke_tool",
"context": {
"tool_name": "database-query",
"query": "SELECT * FROM users"
},
"rules": [
"no-wildcard-queries",
"pii-access-control"
]
}
'import requests
url = "https://api.truthlocks.com/v1/guardrails/check"
payload = {
"agent_id": "550e8400-e29b-41d4-a716-446655440000",
"action": "invoke_tool",
"context": {
"tool_name": "database-query",
"query": "SELECT * FROM users"
},
"rules": ["no-wildcard-queries", "pii-access-control"]
}
headers = {
"X-API-Key": "<api-key>",
"Content-Type": "application/json"
}
response = requests.post(url, json=payload, headers=headers)
print(response.text)const options = {
method: 'POST',
headers: {'X-API-Key': '<api-key>', 'Content-Type': 'application/json'},
body: JSON.stringify({
agent_id: '550e8400-e29b-41d4-a716-446655440000',
action: 'invoke_tool',
context: {tool_name: 'database-query', query: 'SELECT * FROM users'},
rules: ['no-wildcard-queries', 'pii-access-control']
})
};
fetch('https://api.truthlocks.com/v1/guardrails/check', options)
.then(res => res.json())
.then(res => console.log(res))
.catch(err => console.error(err));<?php
$curl = curl_init();
curl_setopt_array($curl, [
CURLOPT_URL => "https://api.truthlocks.com/v1/guardrails/check",
CURLOPT_RETURNTRANSFER => true,
CURLOPT_ENCODING => "",
CURLOPT_MAXREDIRS => 10,
CURLOPT_TIMEOUT => 30,
CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
CURLOPT_CUSTOMREQUEST => "POST",
CURLOPT_POSTFIELDS => json_encode([
'agent_id' => '550e8400-e29b-41d4-a716-446655440000',
'action' => 'invoke_tool',
'context' => [
'tool_name' => 'database-query',
'query' => 'SELECT * FROM users'
],
'rules' => [
'no-wildcard-queries',
'pii-access-control'
]
]),
CURLOPT_HTTPHEADER => [
"Content-Type: application/json",
"X-API-Key: <api-key>"
],
]);
$response = curl_exec($curl);
$err = curl_error($curl);
curl_close($curl);
if ($err) {
echo "cURL Error #:" . $err;
} else {
echo $response;
}package main
import (
"fmt"
"strings"
"net/http"
"io"
)
func main() {
url := "https://api.truthlocks.com/v1/guardrails/check"
payload := strings.NewReader("{\n \"agent_id\": \"550e8400-e29b-41d4-a716-446655440000\",\n \"action\": \"invoke_tool\",\n \"context\": {\n \"tool_name\": \"database-query\",\n \"query\": \"SELECT * FROM users\"\n },\n \"rules\": [\n \"no-wildcard-queries\",\n \"pii-access-control\"\n ]\n}")
req, _ := http.NewRequest("POST", url, payload)
req.Header.Add("X-API-Key", "<api-key>")
req.Header.Add("Content-Type", "application/json")
res, _ := http.DefaultClient.Do(req)
defer res.Body.Close()
body, _ := io.ReadAll(res.Body)
fmt.Println(string(body))
}HttpResponse<String> response = Unirest.post("https://api.truthlocks.com/v1/guardrails/check")
.header("X-API-Key", "<api-key>")
.header("Content-Type", "application/json")
.body("{\n \"agent_id\": \"550e8400-e29b-41d4-a716-446655440000\",\n \"action\": \"invoke_tool\",\n \"context\": {\n \"tool_name\": \"database-query\",\n \"query\": \"SELECT * FROM users\"\n },\n \"rules\": [\n \"no-wildcard-queries\",\n \"pii-access-control\"\n ]\n}")
.asString();require 'uri'
require 'net/http'
url = URI("https://api.truthlocks.com/v1/guardrails/check")
http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true
request = Net::HTTP::Post.new(url)
request["X-API-Key"] = '<api-key>'
request["Content-Type"] = 'application/json'
request.body = "{\n \"agent_id\": \"550e8400-e29b-41d4-a716-446655440000\",\n \"action\": \"invoke_tool\",\n \"context\": {\n \"tool_name\": \"database-query\",\n \"query\": \"SELECT * FROM users\"\n },\n \"rules\": [\n \"no-wildcard-queries\",\n \"pii-access-control\"\n ]\n}"
response = http.request(request)
puts response.read_body{
"allowed": true,
"violations": [
{
"rule": "<string>",
"description": "<string>",
"severity": "low"
}
],
"receipt_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a"
}{
"code": "AUTH_REQUIRED",
"message": "Authentication required",
"http_status": 401
}{
"code": "AUTH_REQUIRED",
"message": "Authentication required",
"http_status": 401
}{
"code": "AUTH_REQUIRED",
"message": "Authentication required",
"http_status": 401
}Guardrails & Delegation
Check Guardrails
Evaluate content or an agent action against configured safety guardrails and policy rules.
POST
/
v1
/
guardrails
/
check
Check Guardrail
curl --request POST \
--url https://api.truthlocks.com/v1/guardrails/check \
--header 'Content-Type: application/json' \
--header 'X-API-Key: <api-key>' \
--data '
{
"agent_id": "550e8400-e29b-41d4-a716-446655440000",
"action": "invoke_tool",
"context": {
"tool_name": "database-query",
"query": "SELECT * FROM users"
},
"rules": [
"no-wildcard-queries",
"pii-access-control"
]
}
'import requests
url = "https://api.truthlocks.com/v1/guardrails/check"
payload = {
"agent_id": "550e8400-e29b-41d4-a716-446655440000",
"action": "invoke_tool",
"context": {
"tool_name": "database-query",
"query": "SELECT * FROM users"
},
"rules": ["no-wildcard-queries", "pii-access-control"]
}
headers = {
"X-API-Key": "<api-key>",
"Content-Type": "application/json"
}
response = requests.post(url, json=payload, headers=headers)
print(response.text)const options = {
method: 'POST',
headers: {'X-API-Key': '<api-key>', 'Content-Type': 'application/json'},
body: JSON.stringify({
agent_id: '550e8400-e29b-41d4-a716-446655440000',
action: 'invoke_tool',
context: {tool_name: 'database-query', query: 'SELECT * FROM users'},
rules: ['no-wildcard-queries', 'pii-access-control']
})
};
fetch('https://api.truthlocks.com/v1/guardrails/check', options)
.then(res => res.json())
.then(res => console.log(res))
.catch(err => console.error(err));<?php
$curl = curl_init();
curl_setopt_array($curl, [
CURLOPT_URL => "https://api.truthlocks.com/v1/guardrails/check",
CURLOPT_RETURNTRANSFER => true,
CURLOPT_ENCODING => "",
CURLOPT_MAXREDIRS => 10,
CURLOPT_TIMEOUT => 30,
CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
CURLOPT_CUSTOMREQUEST => "POST",
CURLOPT_POSTFIELDS => json_encode([
'agent_id' => '550e8400-e29b-41d4-a716-446655440000',
'action' => 'invoke_tool',
'context' => [
'tool_name' => 'database-query',
'query' => 'SELECT * FROM users'
],
'rules' => [
'no-wildcard-queries',
'pii-access-control'
]
]),
CURLOPT_HTTPHEADER => [
"Content-Type: application/json",
"X-API-Key: <api-key>"
],
]);
$response = curl_exec($curl);
$err = curl_error($curl);
curl_close($curl);
if ($err) {
echo "cURL Error #:" . $err;
} else {
echo $response;
}package main
import (
"fmt"
"strings"
"net/http"
"io"
)
func main() {
url := "https://api.truthlocks.com/v1/guardrails/check"
payload := strings.NewReader("{\n \"agent_id\": \"550e8400-e29b-41d4-a716-446655440000\",\n \"action\": \"invoke_tool\",\n \"context\": {\n \"tool_name\": \"database-query\",\n \"query\": \"SELECT * FROM users\"\n },\n \"rules\": [\n \"no-wildcard-queries\",\n \"pii-access-control\"\n ]\n}")
req, _ := http.NewRequest("POST", url, payload)
req.Header.Add("X-API-Key", "<api-key>")
req.Header.Add("Content-Type", "application/json")
res, _ := http.DefaultClient.Do(req)
defer res.Body.Close()
body, _ := io.ReadAll(res.Body)
fmt.Println(string(body))
}HttpResponse<String> response = Unirest.post("https://api.truthlocks.com/v1/guardrails/check")
.header("X-API-Key", "<api-key>")
.header("Content-Type", "application/json")
.body("{\n \"agent_id\": \"550e8400-e29b-41d4-a716-446655440000\",\n \"action\": \"invoke_tool\",\n \"context\": {\n \"tool_name\": \"database-query\",\n \"query\": \"SELECT * FROM users\"\n },\n \"rules\": [\n \"no-wildcard-queries\",\n \"pii-access-control\"\n ]\n}")
.asString();require 'uri'
require 'net/http'
url = URI("https://api.truthlocks.com/v1/guardrails/check")
http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true
request = Net::HTTP::Post.new(url)
request["X-API-Key"] = '<api-key>'
request["Content-Type"] = 'application/json'
request.body = "{\n \"agent_id\": \"550e8400-e29b-41d4-a716-446655440000\",\n \"action\": \"invoke_tool\",\n \"context\": {\n \"tool_name\": \"database-query\",\n \"query\": \"SELECT * FROM users\"\n },\n \"rules\": [\n \"no-wildcard-queries\",\n \"pii-access-control\"\n ]\n}"
response = http.request(request)
puts response.read_body{
"allowed": true,
"violations": [
{
"rule": "<string>",
"description": "<string>",
"severity": "low"
}
],
"receipt_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a"
}{
"code": "AUTH_REQUIRED",
"message": "Authentication required",
"http_status": 401
}{
"code": "AUTH_REQUIRED",
"message": "Authentication required",
"http_status": 401
}{
"code": "AUTH_REQUIRED",
"message": "Authentication required",
"http_status": 401
}Evaluates content or an agent action against the tenant’s configured safety guardrails. The guardrails engine checks the input against all applicable policy rules and returns a deterministic allow/deny decision with detailed violation information.
Guardrail checks are designed for inline use within orchestration flows. They execute in under 50ms for most rule sets, enabling real-time safety enforcement without significant latency overhead.
Circuit Breaker
The guardrails system includes a circuit breaker that automatically escalates to deny-all mode when the violation rate exceeds a configurable threshold within a rolling window. Thecircuit_breaker_status field in the response indicates the current state.
Authentication
string
required
API key with
guardrails:check scope. Alternatively, pass a Bearer JWT token
in the Authorization header.string
required
Tenant identifier for multi-tenant isolation.
Request
string
required
MAIP agent identifier requesting the guardrail check.
string
Text content to evaluate against content safety rules. Provide either
content or action_type (or both).string
Action the agent intends to perform (e.g.
send_email, modify_record,
external_api_call, financial_transaction). Evaluated against action-level
policy rules.object
Additional context for rule evaluation. May include: -
orchestration_id
(string) — Parent orchestration for audit linkage - step_name (string) —
Current workflow step - target_resource (string) — Resource being acted
upon - user_id (string) — End user associated with the action - Any custom
key-value pairs referenced by policy rulesResponse
boolean
Whether the content/action is permitted.
true if no violations were found,
false if any blocking violation was triggered.array
Array of rule violations found. Each violation contains: -
rule_id (string)
— Identifier of the triggered rule - severity (string) — Violation
severity: info, warning, error, critical - message (string) —
Human-readable description of the violationstring
Current circuit breaker state:
closed (normal operation), open (deny-all
mode active), or half_open (recovery testing).integer
Total number of rules evaluated during the check.
number
Time taken to evaluate all rules in milliseconds.
Authorizations
API key for machine-to-machine authentication
Body
application/json

